Advanced Research and Prospect of Buildings Seismic Performance

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Structures".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 24722

Special Issue Editors


E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering (DICA), Politecnico Di Milano, 20133 Milan, Italy
Interests: masonry materials; concrete materials; composite materials; strengthening materials; masonry structures; reinforced concrete; composite structures; steel structures; structural design; structural analysis
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
1. Department of Continuum Mechanics and Structures, Universidad Politécnica de Madrid, 28040 Madrid, Spain
2. Civil Engineering Division, Pontificia Universidad Católica del Perú, 15088 San Miguel, Peru
Interests: seismic; earth buildings; building codes; earthquake; construction; rehabilitation; pathology; numerical modelling; heritage; seismic vulnerability

E-Mail Website
Guest Editor
Instituto de Ciencia y Tecnología del Hormigón, Universitat Politècnica de València, 46022 València, Spain
Interests: structural analysis; finite element analysis; finite element modeling; construction engineering; stress analysis; structural dynamics; concrete technologies; civil engineering technology

Special Issue Information

Dear Colleagues,

The prospect of buildings' seismic performance remains the biggest concern of engineers and researchers in seismic-prone countries. The last earthquakes, considering their damages and losses, despite their magnitude, have shown the flaws of the current or past vision for safer buildings. On the other side, there are plenty of examples to be highlighted, showing the advancement of expertise, knowledge, and know-how around adverse seismic hazards. It is the common opinion that continuous investigation of present structures, construction technique flaws, and the advantages of innovative perspectives will lead to a more secure built stock. In this context, any original contributions of research, case studies, or reviews are welcomed. Both existing and new structures present the same relevance for the coming decades. As a matter of fact, the current challenges which could be of interest cover a vast area of research activity. However, this issue is not limited to very narrow aspects. The current Special Issue, “Advanced Research and Prospect of Buildings Seismic Performance,” aims to gather contributions on:

  • Experimental setups of seismic performance of constructions;
  • Monitoring of seismic performance, new technologies toward awareness, and prevention measures;
  • Numerical analysis of structures;
  • Linear seismic analysis of structures;
  • Behavior factor investigation and consideration;
  • Advanced nonlinear simulations;
  • Fragility analysis;
  • Cases studies of new, existing, or retrofitted structures;
  • Base isolation technologies and their applications;
  • Energy dissipation elements and their applications.

Dr. Rafael Shehu
Dr. Nicola Tarque
Dr. Manuel Buitrago
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Buildings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • seismic analysis
  • seismic performance
  • incremental dynamic analysis
  • pushover analysis
  • fragility functions
  • nonlinear response
  • seismic retrofitting
  • seismic isolation
  • new structures
  • existing structures

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (13 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Editorial

Jump to: Research

3 pages, 157 KiB  
Editorial
Editorial for Special Issue: “Advanced Research and Prospects in Seismic Performance of Buildings”
by Rafael Shehu, Nicola Tarque and Manuel Buitrago
Buildings 2024, 14(10), 3127; https://doi.org/10.3390/buildings14103127 - 30 Sep 2024
Viewed by 554
Abstract
A building’s level of seismic performance remains the greatest concern for engineers and researchers in seismic-event-prone countries [...] Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)

Research

Jump to: Editorial

20 pages, 11088 KiB  
Article
Static and Seismic Safety of the Inclined Tower of Portogruaro: A Preliminary Numerical Approach
by Rafael Shehu
Buildings 2024, 14(9), 2611; https://doi.org/10.3390/buildings14092611 - 23 Aug 2024
Cited by 1 | Viewed by 578
Abstract
Masonry towers are peculiar structures with complex structural behavior despite biased conclusions deriving from their geometrical regularity and simplicity. Their geometrical features and the epistemic uncertainty that masonry material bears strongly influence their static and seismic behavior. This paper investigates a remarkable and [...] Read more.
Masonry towers are peculiar structures with complex structural behavior despite biased conclusions deriving from their geometrical regularity and simplicity. Their geometrical features and the epistemic uncertainty that masonry material bears strongly influence their static and seismic behavior. This paper investigates a remarkable and representative case study. The bell tower of Portogruaro (Italy) is a 57 m high tall construction, built in the XII-th century, and has a notable inclination. The Italian Guideline for the safety assessment of masonry towers is a key focus in this paper, highlighting the pros and cons of different suggested approaches. Some relevant proposals are presented in this paper in order to address the seismic safety assessment of masonry bell towers. The findings show that very slender structures do not meet the guidelines recommendations due to limitations in their current stress state. In addition, in similar cases, the recommended values for the mechanical properties of masonry material led to predicting non-withstanding structural behavior, questioning the correct choice of the adapted material properties. Advanced pushover analysis has been conducted in order to investigate the results of the simplified approach in terms of failure patterns and seismic safety estimation. The simulations are implemented for four different hypothetical scenarios of the existing masonry mechanical properties. The results obtained for the case study tower reflect a different perspective in the seismic assessment of masonry towers when specific approaches are defined. The preliminary results on the safety of Portogruaro Tower show a significant variability of seismic safety based on the adopted scenario, highlighting the necessity to pay attention to the preservation state of the present case and of similar ones. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

16 pages, 7108 KiB  
Article
Seismic Performance of Precast Steel Beam-Column Joint with Bolted Connection
by Yandan Chen, Yonggang Lu and Tong Liu
Buildings 2024, 14(8), 2588; https://doi.org/10.3390/buildings14082588 - 22 Aug 2024
Cited by 1 | Viewed by 842
Abstract
This paper introduces a modular, assembled steel beam-column flange connection joint that efficiently connects prefabricated beams and columns using high-strength bolts. It enables the rapid repair of damaged joints after earthquakes by replacing flange connectors and high-strength bolt groups. Four joint specimens with [...] Read more.
This paper introduces a modular, assembled steel beam-column flange connection joint that efficiently connects prefabricated beams and columns using high-strength bolts. It enables the rapid repair of damaged joints after earthquakes by replacing flange connectors and high-strength bolt groups. Four joint specimens with varying thicknesses and lengths of the inner flange sleeve, scaled at a 1:2 ratio, were fabricated to evaluate performance. These specimens were subjected to low circumferential reciprocal loads to investigate damage modes, hysteresis curves, skeleton curves, ductility performance, energy dissipation capacity, and seismic performance, including stiffness degradation. The test and analysis results reveal that the primary failure mode is characterized by bulging of the flange jacket cover, with damage concentrated in the plastic hinge zone at the beam end. The flange connection joint exhibits excellent load-bearing, rotational, and energy dissipation capacities. The ‘secondary strengthening’ feature significantly enhances joint load-bearing capacity, ductility performance, and energy dissipation, increasing overall safety redundancy. Increasing the thickness and length of the flange connector substantially improves seismic performance and enlarges the plastic development area. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

32 pages, 66583 KiB  
Article
Preliminary Geospatial and In Situ Reconnaissance of the 8 September 2023 Moroccan Atlas Earthquake Damage
by Beatriz González-Rodrigo, Laura Navas-Sánchez, Juan Gregorio Rejas-Ayuga, Orlando Hernández-Rubio and María Belén Benito
Buildings 2024, 14(3), 693; https://doi.org/10.3390/buildings14030693 - 5 Mar 2024
Cited by 1 | Viewed by 1816
Abstract
This research investigates the post-earthquake performances of structures in four rural villages in the Moroccan Atlas, emphasizing common construction system characteristics and design flaws that render buildings susceptible to seismic events. Village selection was based on a prior multispectral satellite-image study, proving effective [...] Read more.
This research investigates the post-earthquake performances of structures in four rural villages in the Moroccan Atlas, emphasizing common construction system characteristics and design flaws that render buildings susceptible to seismic events. Village selection was based on a prior multispectral satellite-image study, proving effective for planning high-impact, post-earthquake field campaigns. The significance of this research resides in on-site data collection, facilitating the physical assessment of earthquake-induced damage and identification of inherent vulnerabilities in construction systems. The constructions in the study area exhibited structural design deficiencies, inadequate construction techniques, and urban modifiers, leading to damage extensively documented in the literature, as well as less-documented unique damage. Predominant seismic-design shortcomings in the study area included subpar material quality, insufficient earthquake-resistant design, and unskilled labor. In situ data were complemented by a global geospatial approach using differential synthetic aperture radar interferometry with Copernicus Sentinel 1 data. Once calibrated the proposed methodology with field data, the analysis of remote sensing processing results, allow assessing the damages in other earthquake-affected areas, including those not visited in the field but also impacted by the seismic event. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

18 pages, 5809 KiB  
Article
Seismic Performance of a 1:4 Scale Two-Story Rammed Earth Model Reinforced with Steel Plates Tested on a Bi-Axial Shaking Table
by Natalia Barrera, Daniel M. Ruiz, Juan C. Reyes, Yezid A. Alvarado and Daniela Carrasco-Beltrán
Buildings 2023, 13(12), 2950; https://doi.org/10.3390/buildings13122950 - 27 Nov 2023
Cited by 4 | Viewed by 1617
Abstract
During the 16th and 17th centuries, Latin American cities adopted earthen construction techniques from European colonizers. As a result, rammed earth (RE) buildings now occupy an important place in Latin America’s cultural heritage. However, earthquakes around the world have shown that unreinforced earthen [...] Read more.
During the 16th and 17th centuries, Latin American cities adopted earthen construction techniques from European colonizers. As a result, rammed earth (RE) buildings now occupy an important place in Latin America’s cultural heritage. However, earthquakes around the world have shown that unreinforced earthen constructions are highly vulnerable. For several years, researchers in northern South America have been proposing a technique that consists of installing confining steel plates (or wooden elements) on both sides of the RE walls to form a grid. This system has shown excellent performance in controlling seismic damage and increasing strength and ductility capacity. Although researchers have tested full-scale one- and two-story earthen walls under pseudo-static loading in the laboratory, and one- and two-story earthen walls at 1:1 and 1:2 scales on uniaxial and biaxial shaking tables, the behavior of a complete reinforced module (one- or two-story) on a shaking table has never been assessed. The present study presents the results of shaking table tests performed on two-story RE modules at 1:4 scale. The experimental data indicate that the retrofit system with confining steel plates was effective in reducing the seismic damage of earthen constructions. In addition, the comparison of the results of the 1:4 scale tests with the 1:2 and 1:1 scale tests previously conducted by the researchers shows that the acceleration levels of the equivalent prototypes are in the same order of magnitude for the three scales. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

26 pages, 18824 KiB  
Article
Reflections from the 2019 Durrës Earthquakes: An Earthquake Engineering Evaluation for Masonry Typologies
by Hüseyin Bilgin, Marsed Leti, Rafael Shehu, Hayri Baytan Özmen, Ahmet Hilmi Deringol and Rrapo Ormeni
Buildings 2023, 13(9), 2227; https://doi.org/10.3390/buildings13092227 - 31 Aug 2023
Cited by 9 | Viewed by 1929
Abstract
Two earthquakes struck the NW region of Albanian territory on 21 September 2019 (Mw = 5.6) and on 26 November 2019 (Mw = 6.4). The epicenters of the seismic activity were located offshore NW Durrës, one of Albania’s most populated cities, [...] Read more.
Two earthquakes struck the NW region of Albanian territory on 21 September 2019 (Mw = 5.6) and on 26 November 2019 (Mw = 6.4). The epicenters of the seismic activity were located offshore NW Durrës, one of Albania’s most populated cities, located 30 km from the capital Tirana. Various aftershocks followed subsequently. While there were no reported injuries, a number of buildings sustained significant damage near the epicenter following the initial event. Subsequently, during the second event, there was loss of life and extensive damage to civilian structures, resulting in multiple collapses. This study focuses on the earthquake damages observed in residential and public buildings in the earthquake-affected region. The earthquakes predominantly affected low-rise masonry buildings, while the newly constructed RC structures built according to the latest seismic rules were almost unaffected. The commonly encountered building typologies in the region, together with photos showing the amount of destruction are presented here. As observed by the authors during the reconnaissance visit to the stricken area, examples of various damage patterns are presented, along with a technically substantiated description of the reasons for those damages. Although modern buildings during recent earthquakes in the region show acceptable performance, the detailed surveys from the Durrës Earthquakes showed that there is still an important level of deficiency in current masonry buildings built by conventional methods and materials. This problem may reoccur in future earthquakes that may hit other rural regions of Albania, which must be focused on systematically in the near future. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

20 pages, 4676 KiB  
Article
Influence of Different European Code Provisions for Capacity Design on the Seismic Performance of Reinforced Concrete Frames
by Fernando Gómez-Martínez and Agustín Pérez-García
Buildings 2023, 13(8), 2051; https://doi.org/10.3390/buildings13082051 - 11 Aug 2023
Cited by 1 | Viewed by 1086
Abstract
Performance-based seismic codes ensure proper inelastic behaviour of reinforced concrete frames through capacity design, among others. This strategy relies not only on avoiding brittle failures and providing ductility to plastic hinges but also in their distribution within the frame aimed at a greater [...] Read more.
Performance-based seismic codes ensure proper inelastic behaviour of reinforced concrete frames through capacity design, among others. This strategy relies not only on avoiding brittle failures and providing ductility to plastic hinges but also in their distribution within the frame aimed at a greater number of storeys involved in the eventual collapse mechanism. Although codes are generally in agreement to some basic principles in order to ensure capacity design, they show some discrepancies regarding the specific strategies. In this paper, capacity design provisions proposed by some European current codes—Eurocode 8, Italian NTC, and Spanish NCSE-02—are compared, and their effectiveness is discussed. The alternative formulation proposed by Italian code for “strong column–weak beam” turns out to be not suitable under specific circumstances, such as with large gravity loads or significant cantilever deformation in lower storeys. Regarding the value of axial load in columns to be considered for the calculation of shear and moment capacities, provisions in the three codes could eventually cause unconservative design for perimeter columns. The Spanish whole set of provisions is proved to not be effective due to their different fundamentals—they are based on overstrength instead of capacity. For all the three cases, some alternative procedures are suggested in this work. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

16 pages, 6362 KiB  
Article
Influence of Heterogeneous Foundation on the Safety of Inverted Cone Bottom Oil Storage Tanks under Earthquakes
by Zuhao Dai, Hong Qiao, Xvdong Hao, Yijuan Wang, Hanwen Lei and Zhiqiang Cui
Buildings 2023, 13(7), 1720; https://doi.org/10.3390/buildings13071720 - 6 Jul 2023
Cited by 3 | Viewed by 1342
Abstract
In order to study the mechanical properties of inverted cone bottom oil storage tanks under earthquakes when the foundation is uneven, finite element modeling calculation for a 20,000 m3 storage tank is carried out based on ANSYS Workbench. Wind load, hydraulic pressure [...] Read more.
In order to study the mechanical properties of inverted cone bottom oil storage tanks under earthquakes when the foundation is uneven, finite element modeling calculation for a 20,000 m3 storage tank is carried out based on ANSYS Workbench. Wind load, hydraulic pressure load, and seismic load are all equalized as distributed loads with varying spatial positions. Considering various combinations of different heterogeneous foundations and seismic loads, and by adjusting the preset foundation bed coefficient, the final foundation bed coefficient and the maximum foundation settlement value when the equivalent stress of the tank floor reaches yield strength under different conditions are calculated. The results show that under the condition of heterogeneous foundation stiffness considering seismic action, when the coefficient of local foundation bed is higher than that of natural silty clay, the requirement for safe use of the inverted cone bottom storage tank can be met. Among the seven simulated heterogeneous foundation forms, the form with high foundation stiffness on the windward side has a great influence on the safety of storage tanks. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

20 pages, 8634 KiB  
Article
Seismic Performance of Concrete Column Connection with Square-Upper-Circular-Lower Steel Tube for Antique Buildings
by Xianghong Sun, Qingwei Guo, Yunpeng Xuan, Bingxue Wu and Jiabin Gao
Buildings 2023, 13(4), 916; https://doi.org/10.3390/buildings13040916 - 30 Mar 2023
Cited by 1 | Viewed by 1592
Abstract
The antique building combines traditional design with contemporary technology, making it an important structural style. Columns, as a crucial structural component, directly affect how well the building functions as a whole. This paper proposes a new connection form with the upper square concrete-filled [...] Read more.
The antique building combines traditional design with contemporary technology, making it an important structural style. Columns, as a crucial structural component, directly affect how well the building functions as a whole. This paper proposes a new connection form with the upper square concrete-filled steel tube-lower circular concrete-filled steel tube (USCFST-LCCFST). This study investigates the seismic performance of the proposed connection form of the columns. First, the finite element software ABAQUS-2021 is used to simulate and analyze the connection forms of the upper square concrete-filled steel tube and lower circular reinforced concrete (USCFST-LCRC) and the upper square steel reinforced concrete and lower circular reinforced concrete (USSRC-LCRC) above the antique building, respectively, which confirms the rationality of the modeling method explored in this paper. Then, geometric modeling of the USCFST-LCCFST connection is performed using ABAQUS. Simulation results demonstrate the superior seismic performance of the proposed connection form. In addition, the influence law of steel tube yield strength and the ratio of upper and lower column linear stiffness on its seismic performance are analyzed and determined through the variational parameter analysis of the USCFST-LCCFST connection form. The steel tube yield strength of USCFST-LCCFST column connection components is recommended to be 355–420 MPa and the ratio of upper and lower column linear stiffness should be no less than 0.063. In order to ensure the good seismic performance of the connection, the steel tube yield strength and the ratio of upper and lower column stiffness should be efficiently controlled in the design of antique buildings’ USCFST-LCCFST column connection components. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

18 pages, 10683 KiB  
Article
Seismic Retrofitting of Indonesian Masonry Using Bamboo Strips: An Experimental Study
by Ahmad Basshofi Habieb, Farisal Akbar Rofiussan, Djoko Irawan, Gabriele Milani, Budi Suswanto, Amien Widodo and Hidajat Soegihardjo
Buildings 2023, 13(4), 854; https://doi.org/10.3390/buildings13040854 - 24 Mar 2023
Cited by 5 | Viewed by 2347
Abstract
Unreinforced masonry (UM) is well known as a vulnerable structure against earthquakes. However, it remains a popular structural system for low-rise residential housing in many high-seismicity areas, particularly in developing regions due to its low cost and easy construction. In the present study, [...] Read more.
Unreinforced masonry (UM) is well known as a vulnerable structure against earthquakes. However, it remains a popular structural system for low-rise residential housing in many high-seismicity areas, particularly in developing regions due to its low cost and easy construction. In the present study, a retrofitting strategy using locally available material, bamboo strips, was proposed. In addition to its fast-growing rate, the tensile strength of bamboo is considered high, nearly comparable to its steel counterpart. A series of experimental tests were performed in this study, including the bamboo tensile test, the mortar flexural test, the diagonal compressive shear test on the masonry assemblages, and the in-plane pushover test on masonry wall specimens without and with bamboo reinforcement. The retrofitted specimens with different volumes of bamboo reinforcement were also considered. The results show that the application of bamboo reinforcement, at a proper volume, significantly increases the ultimate strength and the ductility of the masonry wall. Such results indicate that the brittle failure of UM structures can be avoided by means of bamboo retrofitting. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

16 pages, 3723 KiB  
Article
Seismic Hazard Curve as Dynamic Parameters in Earthquake Building Design for Sabah, Malaysia
by Noor Sheena Herayani Harith, Felix Tongkul and Azlan Adnan
Buildings 2023, 13(2), 318; https://doi.org/10.3390/buildings13020318 - 20 Jan 2023
Cited by 4 | Viewed by 3837
Abstract
This paper presents the significance of a seismic hazard curve plot as a dynamic parameter in estimating earthquake-resistant structures. Various cases of structural damages in Malaysia are due to underestimating earthquake loadings since mostly buildings were designed without seismic loads. Sabah is classified [...] Read more.
This paper presents the significance of a seismic hazard curve plot as a dynamic parameter in estimating earthquake-resistant structures. Various cases of structural damages in Malaysia are due to underestimating earthquake loadings since mostly buildings were designed without seismic loads. Sabah is classified as having low to moderate seismic activity due to a few active fault lines. Background point, area, and line sources are the three tectonic features that have impacted Sabah. Data on earthquakes from 1900 to 2021 have been collected by a number of earthquake data centers. The seismicity is based on a list of historical seismicities in the area, which stretches from latitudes 4 °S to 8 °N and longitudes 115 °E to 120 °E. The goal of this research is to develop a seismic hazard curve based on a conventional probabilistic seismic hazard analysis being examined for the maximum peak ground acceleration at 10% probability of exceedance as published in MSEN1998-1:2015. This study extended to 5% and 2% probability of exceedance combined with the seismic hazard curve by using Ranau as a case study. To calculate the expected ground motion recurrence, such as peak ground acceleration at the site, earthquake recurrence models were combined with selected ground motion models. A logic tree structure was used to combine simple quantities such as maximum magnitudes and the chosen ground motion models to describe epistemic uncertainty. The result demonstrates that peak ground acceleration values at the bedrock were estimated to be 0.16, 0.21, and 0.28 g of the total seismic hazard curve at 10%, 5%, and 2% PE in a 50-year return period, respectively. The seismic hazard study at a Ranau site basically depends on the seismicity of a region and the consequences of failure in the past. Thus, the results can be used as a basis for benchmarking design or evaluation decisions and for designing remedial measures for Sabah constructions to minimize structural failure. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

19 pages, 9316 KiB  
Article
Shaking Table Testing of a Low-Rise Reinforced Concrete Intermediate Moment Resisting Frame
by Sida Hussain, Hamna Shakeel, Asif Ali, Muhammad Rizwan and Naveed Ahmad
Buildings 2022, 12(12), 2104; https://doi.org/10.3390/buildings12122104 - 1 Dec 2022
Cited by 1 | Viewed by 2835
Abstract
Multi-level shaking table tests were performed on a 1:3 reduced scale two-story reinforced concrete (RC) intermediate moment resisting frame (IMRF) conforming to the requirements given in the ACI-318-19. The exterior joints lacked shear reinforcement to assess the viability of the ACI model recommended [...] Read more.
Multi-level shaking table tests were performed on a 1:3 reduced scale two-story reinforced concrete (RC) intermediate moment resisting frame (IMRF) conforming to the requirements given in the ACI-318-19. The exterior joints lacked shear reinforcement to assess the viability of the ACI model recommended for determining the design shear strength of the beam–column joint panel. One of the horizontal components of the 1994 Northridge earthquake accelerogram (090 CDMG Station 24278, Source: PEER strong motion database) was input to the frame for multi-level shaking table testing. Plastic hinges developed in beams under base input motion with a maximum acceleration equal to 0.40 g. The exterior joints incurred extensive damage under base input motion with a maximum acceleration equal to 0.70 g. The frame achieved displacement ductility and overstrength factors (determined as the ratio of the maximum resistance of the frame to the design base share force) equal to 2.40 and 2.50, respectively. This gives a response modification factor equal to 6. The satisfactory performance of the frame is attributed to the high efficiency of the beam–column joint, which was confined by spandrel beams on two faces and the high strength of the concrete. The inherent minimal confinement is sufficient to ensure satisfactory seismic behavior. The analysis confirmed overstrength equal to 1.58 for joint shear strength in comparison to the design strength determined using the ACI model. The data might serve as a reference for calibrating and validating numerical modeling techniques for performance evaluation, which are crucial in the context of performance-based engineering. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Graphical abstract

24 pages, 6278 KiB  
Article
Yielding and Ultimate Deformations of Wide and Deep Reinforced Concrete Beams
by Fernando Gómez-Martínez and Agustín Pérez-García
Buildings 2022, 12(11), 2015; https://doi.org/10.3390/buildings12112015 - 18 Nov 2022
Cited by 3 | Viewed by 1588
Abstract
Current formulations proposed by Eurocode 8 part 3 for the inelastic deformations of existing reinforced concrete members are assessed separately for wide beams (WB) and conventional deep beams (DB). The current approach, based on a large experimental database of members, predicts larger ultimate [...] Read more.
Current formulations proposed by Eurocode 8 part 3 for the inelastic deformations of existing reinforced concrete members are assessed separately for wide beams (WB) and conventional deep beams (DB). The current approach, based on a large experimental database of members, predicts larger ultimate chord rotation but lower chord rotation ductility for WB rather than for DB despite the similar curvature ductility, due to lower plastic hinge lengths in WB. However, if the data are disaggregated into DB and WB, predicted chord rotations are consistently conservative for DB and not conservative for WB if compared with experimental values, especially at ultimate deformation. Thus, plastic hinge length may be even greater for DB in comparison to WB. Therefore, some feasible corrections of the formulations for chord rotations are proposed, in order to reduce the bias and thus increase the robustness of the model for cross-section shape variability. Full article
(This article belongs to the Special Issue Advanced Research and Prospect of Buildings Seismic Performance)
Show Figures

Figure 1

Back to TopTop