Innovative and Sustainable Materials for Strengthening and Rehabilitation of Building Structures

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Materials, and Repair & Renovation".

Deadline for manuscript submissions: 31 January 2025 | Viewed by 2260

Special Issue Editor


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Guest Editor
Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
Interests: civil engineering; shear strength; structural engineering; building

Special Issue Information

Dear Colleagues,

The built heritage of many countries throughout the world is mainly composed of masonry and reinforced concrete buildings, which may have not been designed according to the current regulations and standards or against the seismic action. Moreover, over time, their structural performances could have degraded. Therefore, we must retrofit and strengthen these constructions considering both gravitational and seismic loads. With this purpose, in recent years, the use of innovative materials, e.g., high-performance fibers and different types of organic and inorganic matrices, has become widespread. It is well known that the construction sector is responsible for a huge amount of CO2 emission and to achieve carbon neutrality in the future, the novel materials must be durable and sustainable. In this framework, experimental evidence supported by numerical simulations should determine the efficiency of these solutions, and, when possible, provide definitions for the design criteria and formulations.

This Special Issue aims to collect original papers or state-of-the-art reviews about innovative and sustainable materials for the strengthening and rehabilitation of existing masonry and reinforced concrete buildings. The contributions should be focused on, but not limited to, the following topics:

  • Experimental campaigns on innovative and sustainable materials for structural retrofitting, from material testing to full-scale testing;
  • Experimental procedures for the mechanical characterization of the innovative materials;
  • Studies on the durability of sustainable materials;
  • Numerical simulations in support of experimental tests;
  • Analytical formulations and design criteria.

Dr. Francesca Ferretti
Guest Editor

Manuscript Submission Information

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Keywords

  • existing buildings
  • masonry
  • reinforced concrete
  • retrofitting interventions
  • innovative materials
  • sustainable materials
  • durability

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Published Papers (2 papers)

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Research

18 pages, 7142 KiB  
Article
Experimental and Numerical Investigation of Shear Strengthening of Simply Supported Deep Beams Incorporating Stainless Steel Plates
by Ahmed Hamoda, Saad A. Yehia, Mizan Ahmed, Khaled Sennah, Aref A. Abadel and Ramy I. Shahin
Buildings 2024, 14(11), 3680; https://doi.org/10.3390/buildings14113680 - 19 Nov 2024
Viewed by 238
Abstract
In this study, the effectiveness was investigated of shear strengthening techniques in reinforced concrete (RC) deep beams incorporating stainless steel plates (SSPs). Four RC deep beams were tested under incremental static loading until failure to examine the proposed strengthening techniques. The key parameters [...] Read more.
In this study, the effectiveness was investigated of shear strengthening techniques in reinforced concrete (RC) deep beams incorporating stainless steel plates (SSPs). Four RC deep beams were tested under incremental static loading until failure to examine the proposed strengthening techniques. The key parameters considered in this study included the arrangement of the externally bonded SSPs. The experimental findings demonstrated that strengthening using SSPs led to substantial improvements in their performance compared to the unstrengthened control beam. The use of SSPs increased the ultimate shear capacity by 129 to 175% over the control specimen. Finite element models (FEMs) were developed to simulate the responses of the tested beams strengthened using SSPs. Parametric studies were then conducted using the validated FEM to investigate to identify the effects of the area of SSPs on the shear capacity of the beams. The parametric studies concluded that increasing the plate thickness resulted in the enhanced shear capacity of the deep beam specimens up to a critical point upon which the increases in the thickness have insignificant effects on the shear strength. The accuracy of the design equations given by European and American codes in predicting the shear strength of the deep beams is examined. Full article
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15 pages, 1701 KiB  
Article
Proposal of Empirical Equations for Masonry Compressive Strength: Considering the Compressive Strength Difference between Bricks and Mortar
by Karishma Nazimi, Juan Jose Castro, Shogo Omi and Bimkubwa Seif Ali
Buildings 2024, 14(4), 1138; https://doi.org/10.3390/buildings14041138 - 18 Apr 2024
Cited by 1 | Viewed by 1654
Abstract
Solid brick masonry poses challenges in predicting compressive strength due to its non-homogeneous and anisotropic nature, compounded by variations in the properties of the constituent bricks and mortar. This research addresses this issue through secondary analysis and examining the interplay between brick-and-mortar compressive [...] Read more.
Solid brick masonry poses challenges in predicting compressive strength due to its non-homogeneous and anisotropic nature, compounded by variations in the properties of the constituent bricks and mortar. This research addresses this issue through secondary analysis and examining the interplay between brick-and-mortar compressive strengths. Contrary to existing empirical equations for predicting masonry compressive strength, regression analysis was conducted on test specimens categorized into two groups based on the relative strength of the constitutive materials: Group 1, masonry specimens with bricks stronger than mortar (fb > fj), and Group 2, specimens where the mortar has higher compressive strength than the bricks (fj > fb). Additionally, the calculated impact of factors like the slenderness ratio and mortar-to-brick joint thickness ratio on masonry compressive strength highlights the need for more precise compressive strength predictions. The results emphasize the importance of considering the individual contributions of bricks and mortar to the overall compressive strength, shedding light on how these components affect structural behavior. Full article
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