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Seismic Impacts on Structures and Infrastructures

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: closed (10 September 2021) | Viewed by 4035

Special Issue Editors


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Guest Editor
Institute of Mechanics and Seismic Stability of Structures, Academy of Sciences of the Republic of Uzbekistan, 70, Тошкент 100047, Uzbekistan
Interests: seismic stability of buildings and structures; dynamic strain and destruction of soils and rocks; soil-structure interaction; wave processes in soil media interacting with underground structures

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Guest Editor
Institute of Civil Engineering, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 Saint Petersburg, Russia
Interests: structural engineering; cold formed steel structures; concrete structures; building physics; mechanics of materials
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Institute of Mechanics and Seismic Stability of Structures, Academy of Sciences of the Republic of Uzbekistan, 70, Тошкент 100047, Uzbekistan
Interests: dynamics of various structures; internal dissipation and wave entrainment of energy; three-dimensional dynamic problems for earth structures; geometrical and physical nonlinearity; soil interaction with water medium; strength and seismic resistance of earth dams; seismic stability and the strength of earth dams

Special Issue Information

Dear Colleagues,

Experimental and theoretical studies to determine the seismic stability of earth dams and reservoir dams are also critical since their destruction can have catastrophic consequences. Therefore, the determination of sliding surfaces and collapse of soil structures, taking into account the degree of moisture content of the soil massif and the soil's inelastic properties, are very relevant.

Ensuring the strength and stability of underground and underwater pipelines and tunnels during seismic impacts are the primary tasks of the population's life support. The preservation of the environment also depends on the seismic safety of underground pipelines that transport energy carriers.

Experimental studies of the behavior of underground and above ground structures under seismic or equivalent dynamic effects are very important. In recent years, centrifugal modeling methods have been effectively used in experimental studies of structures and their dynamics. The experimental results have undoubtedly led to new knowledge and, consequently, to new theories in seismic resistance of structures and infrastructure.

Prof. Dr. Karim Sultanovich Sultanov
Prof. Dr. Nikolai Vatin
Prof. Dr. Mirziyod Mirsaidovich Mirsaidov
Guest Editors

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Keywords

  • bridge
  • building
  • buildings and structures
  • damper
  • dams
  • earthquake
  • earthquake effect
  • earthquake engineering
  • earthquake magnitude
  • full-waveform
  • geophysics
  • ground motion
  • ground structures
  • hazard analysis
  • hazard assessment
  • infrastructure
  • peak acceleration
  • pipeline
  • S wave
  • seismic
  • seismic data
  • seismic hazard
  • seismic isolation
  • seismic loads
  • seismic prospecting
  • seismic resistance
  • seismic response
  • seismic wave
  • seismic waves.
  • seismology
  • site effect
  • soil–structure interaction
  • surface wave
  • tunnels
  • underground structures
  • underwater structures
  • wave equation

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Published Papers (1 paper)

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Research

26 pages, 5934 KiB  
Article
Wave Theory of Seismic Resistance of Underground Pipelines
by Karim Sultanovich Sultanov and Nikolai Ivanovich Vatin
Appl. Sci. 2021, 11(4), 1797; https://doi.org/10.3390/app11041797 - 18 Feb 2021
Cited by 35 | Viewed by 3384
Abstract
The object of the research is an underground straight horizontal pipeline subjected to seismic impact. The research method was analytical. The results were compared with the experimental results of other authors and computer calculations. It was shown that the main disadvantage of the [...] Read more.
The object of the research is an underground straight horizontal pipeline subjected to seismic impact. The research method was analytical. The results were compared with the experimental results of other authors and computer calculations. It was shown that the main disadvantage of the dynamic theory of seismic resistance of underground pipelines is the neglect of the dynamic stress state in soil under seismic wave propagation. The next drawback of the dynamic theory is an inaccurate, approximate accounting for the displacement of the soil medium to which the underground pipeline is embedded. The complete interaction process includes the stages of nonlinear changes in the interaction force (the friction force) by manifesting its peak value and the Coulomb friction. The contact layer of soil undergoes shear deformations until complete structural destruction of the soil contact layer. The interaction force is the friction force, and its peak value does not appear. The seismic resistance of underground pipelines should be considered based on the theory of propagating seismic waves in a soil medium and the interaction of seismic waves with underground pipelines, i.e., based on the wave theory of seismic resistance of underground pipelines. A one-dimensional coupled problem of seismic resistance of underground pipelines under seismic impacts was posed based on the wave theory. An algorithm and a program for the numerical solution of the stated wave problems were developed using the method of characteristics and the method of finite differences. An analysis of the laws of interaction of underground pipelines with soil under seismic influences shows that it is necessary to use in the calculations the laws of interaction that account for the complete interaction processes observed in experiments. The analysis of the obtained numerical solutions and the posed coupled problems of the wave theory of seismic resistance of underground pipelines show the occurrence mechanisms of longitudinal stresses in underground pipelines under seismic influences. The results of calculations stated that an account for the dynamic stress normal to the underground pipeline’s outer surface leads to multiple increases in longitudinal stress in the underground pipeline. This multiple increase is due to the transformation of the interaction force into an active frictional force, resulting from a greater strain in soil than the one in the underground pipeline. Based on the analysis results, a theory of the seismic wave propagation process in an underground pipeline and surrounding soil was proposed. Full article
(This article belongs to the Special Issue Seismic Impacts on Structures and Infrastructures)
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