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Advanced Studies of Risk Resistant Building Structures

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

Deadline for manuscript submissions: closed (10 February 2023) | Viewed by 23699

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Special Issue Editors

Dr. Chunfeng Zhao

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Guest Editor

College of Civil Engineering, Hefei University of Technology, Hefei 230009, China
Interests: seismic fragility; seismic isolation; seismic performance; earthquake engineering; machine learning

Prof. Dr. Xiaohui Yu

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Guest Editor

College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China
Interests: seismic fragility analysis of structures; seismic risk and resilience evaluation of structures; progressive collapse performance of structures
Special Issues, Collections and Topics in MDPI journals

Dr. Wen Bai

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Guest Editor

Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
Interests: seismic isolation; seismic resilience; non-structural component seismic performance

Special Issue Information

Dear Colleagues,

The operational performance of engineering structures may significantly affect structural safety during the full life cycle. This Special Issue, entitled “Advanced Studies of Risk-Resistant Building Structures”, mainly focuses on recent advancements in structural performance, fragility and risk evaluation for structures, infrastructures, and nuclear power plants under various loads, considering uncertainties. Furthermore, novel methods or frameworks based on or using artificial intelligence are particularly encouraged for risk evaluation analysis. Authors who are experts in these fields of study are invited and encouraged to submit their contributions on the following topics to this Special Issue. The topics include, but are not limited to, the following:

Seismic fragility analysis;
Seismic risk analysis;
Seismic performance;
Risk evaluation;
Seismic isolation;
Non-structural components;
Machine learning.

Dr. Chunfeng Zhao
Prof. Dr. Xiaohui Yu
Dr. Wen Bai
Guest Editors

Manuscript Submission Information

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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.

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Keywords

fragility analysis
seismic fragility
seismic risk
seismic performance
risk evaluation
reliability
seismic isolation
non-structural components
machine learning

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Published Papers (10 papers)

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Research

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27 pages, 6429 KiB

Open AccessArticle

Design Optimization of a Hybrid Vibration Control System for Buildings

by Basel Salaas, Gebrail Bekdaş, Yasser E. Ibrahim, Sinan Melih Nigdeli, Mohamed Ezzat, Mahmoud Nawar and Aylin Ece Kayabekir

Buildings 2023, 13(4), 934; https://doi.org/10.3390/buildings13040934 - 1 Apr 2023

Cited by 4 | Viewed by 1802

Abstract

Control of high-rise structures under seismic excitations was investigated using a passive hybrid control system consisting of a base-isolation (BI) subsystem and a passive tuned liquid column damper (TLCD) system. Both of the systems were optimized considering using the other system in the same structure. An optimization method was developed, and a computer code was written based on dynamic analysis of the structure and metaheuristic optimization methods. Within the scope of the study, a general solution was found by using many earthquake records during the optimization process. Moreover, one of the most suitable and successful metaheuristic algorithms was used in this study. In addition, numerical simulations were performed on a benchmark high-rise building structure to investigate the effectiveness of the optimized hybrid control system in controlling the seismic response of the building. The performance of the base-isolated TLCD-controlled structure was examined when the TLCD was placed on the base floor by using a set of 44 recorded ground motions as base excitations. Based on the results obtained from this study, the use of a base-isolation subsystem decoupling the superstructure from the ground motions by lowering the structure’s fundamental natural frequency reduces the structural responses of the building in most cases. The responses of the base-isolation subsystem were not too large since the parameters of the BI subsystem were optimized specifically for the investigated structure. Nevertheless, displacements of BI might exceed the maximum limit to undesirable values in some cases. The TLCD system appears to be quite effective in protecting the base-isolation subsystem by reducing its displacements to the maximum allowable limit or below when attached to it. Moreover, the proposed passive hybrid control system can effectively reduce the structural responses under seismic excitations. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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18 pages, 7903 KiB

Open AccessArticle

Influence of the Vertical Component of Yangbi Ground Motion on the Dynamic Response of RC Frame and Brick-Concrete Structure

by Hongwei Wang, Mingming Jia, Yanwu Yao, Xueliang Chen and Zirong Zhang

Buildings 2023, 13(1), 147; https://doi.org/10.3390/buildings13010147 - 6 Jan 2023

Cited by 3 | Viewed by 2052

Abstract

An earthquake of magnitude 6.4 occurred in Yangbi County, Yunnan Province on 21 May 2021, with a focal depth of 8 km, and strong ground motion with vertical components was monitored by Yangbi station (53YBX). A total of 14,122 houses were damaged in Yangbi in the earthquake, and 232 of them collapsed. Vertical components of ground motions have been gained more attention for its effect on structure’s seismic response in epicenter or near-fault regions at present. Taking the three earthquake ground motions of Yangbi, Chi-Chi, and Loma Prieta as inputs, and modeling based on Perform-3D, this research carried out the seismic dynamic time history analysis of an RC (reinforced concrete) frame structure and a brick-concrete structure under both horizontal and vertical working conditions. The results showed that vertical components of the three ground motions had no evident impact on the top horizontal displacement and acceleration of the two types of structures. Among the three ground motions, the vertical component of Yangbi ground motion has largely influenced the top vertical displacement, acceleration, and axial force of the frame column bottom (or masonry wall bottom). The vertical component had different amplification effects on the axial pressure and the bending moment of a single column at the bottom of the RC frame structure, thus causing resonance amplification effect of the brick-concrete structure floors and amplifying the vertical acceleration of the top floor. In addition, it considerably increase the maximum axial tensile strain of masonry walls and the possibility of faster tensile failure of the brick-concrete structure. Influence of vertical ground motion on the bearing capacity of RC frame structure’s columns and the brick-concrete structure’s masonry walls should not be ignored. The results of the research may provide a reference for the earthquake-resistant design of building structures, especially the earthquake-resistant design considering the vertical seismic effect. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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16 pages, 19860 KiB

Open AccessArticle

A Calculation Model for Vibration Effect Induced by Resonance-Free Vibratory Hammer Method

by Xinjun Cheng, Xiang Xu, Wen Bai, Zhinan Hu, Haian Liang and Jie Cui

Buildings 2022, 12(12), 2204; https://doi.org/10.3390/buildings12122204 - 13 Dec 2022

Cited by 3 | Viewed by 2181

Abstract

Buildings close to the ground treated by the resonance- free vibratory hammer method are often vulnerable to excessive vibrations. An in situ test of an urban soft site was carried out to investigate the resonance-free vibratory hammer induced vibration effects during construction. Vibration pickups were set at the positions with distances of 15 m, 30 m, 50 m, and 100 m away from the vibration source. On the basis of the results obtained from this investigation, vibration effects of the resonance-free vibratory hammer and safe construction distances were systematically analyzed. The testing results indicate that the vibration in the vertical direction is stronger than that in the other two horizontal directions. The vertical vibration should be the main reference quantity for the foundation treatment by using the resonance-free vibratory hammer method. The predominant frequency of each measuring point in the same direction decreased with an increase of the distance from the vibration source (DFTVS). In terms of the measuring point with a DFTVS of 30 m, the peak values of velocity in all directions were within 5 mm/s, which meet the requirements of the allowable limit of building vibration. According to the in situ testing results, a model for calculating the acceleration exponent of the vibration caused by the resonance-free vibratory hammer technology was established by comprehensively considering the amplitude of acceleration, the attenuation coefficient of THE DFTVS, and the vibration correction factor. Finally, the reliability of the calculation model was verified through the comparison between the calculated results and field vibration experimental results, in which all the correlation coefficients of validation example were above 0.9. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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21 pages, 6942 KiB

Open AccessArticle

Test and Bearing Capacity Calculation of a New Energy-Dissipated Precast Shear Wall

by Yuliang Wang, Zhaohui Wang, Yunlong Zhou, Zhinian Yang and Yumin Zhang

Buildings 2022, 12(11), 1990; https://doi.org/10.3390/buildings12111990 - 16 Nov 2022

Cited by 1 | Viewed by 1467

Abstract

At present, most precast shear walls are implemented in accordance with the method equivalent to a cast-in-place structure, where the joint is complicated, and the construction is difficult. According to the characteristics of precast shear wall structures, the design method of “strong horizontal joints, weak vertical joints” for a precast shear wall structure is proposed. The existing horizontal joint method was used to form strong horizontal joints, and the damper was used to connect the vertical joints to form weak vertical joints. It can reduce the pouring of concrete and improve construction efficiency. Three types of specimens (Rectangle shape, T shape, L shape) were designed. Low cycle reciprocating load tests were carried out under different axial compression ratios (0.1, 0.3), and the bearing capacity and ductility of the specimens were studied. The results show that the precast shear wall structure has good mechanical properties. The ductility coefficient is close to or greater than three, and the maximum ductility coefficient is 3.62. The specimens have good ductility. The relative displacement of the damper is greater than 1.75 mm. All the dampers yield and dissipate energy, which improves the seismic performance of the structure and plays a good role in connecting the wall limbs. The strain distribution law of the specimen section is discussed, the simplified mechanical calculation model is given, and the calculation method of flexural capacity of a precast shear wall structure is put forward. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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18 pages, 5261 KiB

Open AccessArticle

Seismic Response of a Liquefiable Site-Underground Structure System

by Xinjun Cheng, Xiang Xu, Zhinan Hu, Liping Jing, Haian Liang and Jie Cui

Buildings 2022, 12(10), 1751; https://doi.org/10.3390/buildings12101751 - 20 Oct 2022

Cited by 1 | Viewed by 2054

Abstract

To study the dynamic response of a saturated sand-underground structure system subjected to earthquakes, a series of shaking table tests with a geometric scale ratio of 1/30 were conducted. Based on the experimental acceleration records of testing soil deposits, the relationship between dynamic shear stress and horizontal soil displacement was analyzed by the 1D shear beam inverse calculation method. Meanwhile, the development law of the equivalent dynamic horizontal subgrade reaction coefficient and the dynamic strain of the sidewall in the underground structure has also been discussed. The testing results indicate that the dynamic shear stress of the soil deposit under the bottom plate of the underground structure is larger than that of the soils surrounding the sidewall and above the roof plate; in addition, the soil displacement tends to decrease with the buried depth. The dynamic shear stress–displacement hysteretic loop of the soil deposits tends to be plump as the input amplitude increases. The spectral characteristics of ground motions obviously influence both the dynamic shear stress–displacement hysteretic curve and the excess pore water pressure ratio of saturated sand soil, especially under medium and strong excitations. The equivalent dynamic horizontal subgrade reaction coefficient decreases with the increase of soil depth, and the difference between the coefficient above and underneath the underground structure model can reach 7.589 MN/m³. On the contrary, the equivalent dynamic horizontal subgrade reaction coefficient decreases with the increase of the input amplitude of ground motions, and the maximum reduction ratios of the coefficient are 74.4%, 66.7%, and 47.3%, corresponding to the El-Centro, Kobe, and Wolong ground motions, respectively. The soil liquefaction has a certain effect on the equivalent dynamic horizontal subgrade reaction coefficient. In general, the dynamic strain at the top of the sidewall in the underground structure is higher than that at the bottom of the sidewall, which illustrates that the deformation of underground structures is in good agreement with the seismic deformation mode of soil deposits. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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17 pages, 3994 KiB

Open AccessArticle

Bending Performance of Precast Ceramsite-Concrete-Insulated Sandwich Panel with Stainless Steel Shear Connectors

by Yingjie Chen, Chaofeng Kang, Yunfeng Wu and Zhenxiao Qian

Buildings 2022, 12(10), 1640; https://doi.org/10.3390/buildings12101640 - 9 Oct 2022

Cited by 2 | Viewed by 1872

Abstract

With the continuous improvement of building energy-conservation requirements, both traditional concrete external insulation and internal insulation have been unable to meet energy-saving needs. In order to meet the demands of building energy-saving in the new era, new precast concrete external-wall-insulation technology should be developed. In this study, a bending static test and numerical simulation were carried out to evaluate the influence of the thickness of inner concrete wythe and insulation and the length of plate-type shear connectors on the cracking condition, bearing capacity and composite degree of a precast ceramsite-concrete-insulated sandwich panel (PCCISP) under the outside-plane load. The results show that the failure modes of four precast ceramsite-concrete-insulated sandwich panels were all ductile failure of the concrete flexural members. The ultimate bearing capacity of the PCCISP decreased with the decrease in the thickness of the inner concrete wythe. Reducing the thickness of insulation had no significant influence on the ultimate bearing capacity. When the thickness of insulation was reduced by 30%, the composite degree of rigidity and bearing capacity of the PCCISP were increased by 8.85% and 2.67%, respectively. Increasing the length of the plate-type shear connector slightly increased the ultimate bearing capacity, but it had no obvious influence on the rigidity and bearing capacity composite degree. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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19 pages, 7077 KiB

Open AccessArticle

Theoretical and Numerical Study on the Pile Barrier in Attenuating Seismic Surface Waves

by Chunfeng Zhao, Chao Zeng, Yinzhi Wang, Wen Bai and Junwu Dai

Buildings 2022, 12(10), 1488; https://doi.org/10.3390/buildings12101488 - 20 Sep 2022

Cited by 6 | Viewed by 2155

Abstract

The purpose of this study is to investigate the attenuation effect of the pile barrier in blocking seismic surface waves by using theoretical and numerical methods. First, we derive the dispersion characteristics of pile barriers embedded in soil from the perspective of periodicity theory to explain that such periodic barriers can attenuate seismic surface waves when the main frequencies fall into the band gaps of the pile barrier. Second, the dispersion characteristics of periodic barriers composed of different inclusions are discussed, and it is suggested preliminarily that scatters with low stiffness and low density are more conductive to mitigate low-frequency surface waves. Third, a three-dimensional transmission calculation model is also developed to illustrate that the attenuation zone of a finite number of piles is consistent with the surface wave band gap. Finally, transient analysis of the periodic pile barriers is performed to validate the block effects on seismic surface waves. The numerical results show that the frequency band gaps of multi-row pile barriers are in accordance with the frequency band gaps of the surface wave in theory, which can greatly mitigate surface ground vibration. The pile spacing, number of piles, and pile length are the key parameters that can affect the width of attenuation zones of the periodic barriers by an appropriate design. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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19 pages, 6693 KiB

Open AccessArticle

Study on Seismic Performance of TID-LRB Hybrid Control System under Multi-Level Earthquakes

by Xiao Huang, Zhixiang Hu, Yunlin Liu and Liqing Nie

Buildings 2022, 12(9), 1465; https://doi.org/10.3390/buildings12091465 - 16 Sep 2022

Cited by 6 | Viewed by 1702

Abstract

The seismic response characteristics of a lead-rubber-bearing(LRB) base-isolated structure under rare and very rare earthquakes were investigated. The acceleration, ductility coefficient, and shear strain of the LRB increase significantly under very rare earthquakes in comparison to rare earthquakes; in particular, the shear strain of the LRB may exceed the ultimate shear strain and cause damage to the base-isolated structure. The criterion selected for the optimum tuned inerter damper (TID) of the TID–LRB hybrid control system is the minimization of the mean value of the maximum shear strain of the LRB. For each inertance mass ratio of the TID, there exists an optimum tuning frequency ratio and damping ratio of the TID to minimize the shear strain of the LRB, and the effectiveness is increased with a higher inertance mass ratio. By equipping the TID with appropriate parameters, the safety of the LRB during rare and very rare earthquakes can be ensured. Finally, the pounding response of the base-isolated structure collision with the moat wall under very rare earthquakes was analyzed. It was observed that under very rare earthquakes, the ductility coefficients of the superstructure by equipping with the suitable TID were improved, and the shear strain of the LRB was reduced. In addition, equipping the TID can reduce the required width of the isolation joint to avoid collision between the isolation layer and the moat wall, and with an increase in the inertance mass ratio, the required width of the isolation joint is smaller. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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23 pages, 14496 KiB

Open AccessArticle

Performance of Bolt-Welded CFST Short Columns with Different Initial Imperfections: Experimental and Numerical Studies

by Peng Yu, Zhaoyong Ren, Weijing Yun, Ye Zhao and Jinglei Xu

Buildings 2022, 12(9), 1352; https://doi.org/10.3390/buildings12091352 - 1 Sep 2022

Cited by 6 | Viewed by 1976

Abstract

Gap between the steel tube and core concrete of Concrete-Filled Steel Tube (CFST) members is regarded as an initial imperfection, which may exist in the CFST arch bridge due to construction process problems. In this paper, based on the design scheme of the bolt-welded joints in arch rib columns of an extra-long span CFST arch bridge, the effects of two types of initial imperfections, interfacial gap and spherical-cap gap, on the mechanical properties of Bolt-Welded CFST (BWCFST) short column under axial compression were investigated. Axial compression tests were conducted on three column specimens with spherical-cap gap, three specimens with interfacial gap, and one normal specimen without imperfection. A Finite Element Analysis (FEA) model was developed to further investigate the behavior of the BWCFST short columns, and was validated by the experiment. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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Review

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22 pages, 950 KiB

Open AccessFeature PaperEditor’s ChoiceReview

Temperature Effect on Vibration Properties and Vibration-Based Damage Identification of Bridge Structures: A Literature Review

by Jin Luo, Minshui Huang and Yongzhi Lei

Buildings 2022, 12(8), 1209; https://doi.org/10.3390/buildings12081209 - 11 Aug 2022

Cited by 47 | Viewed by 5279

Abstract

In civil engineering structures, modal changes produced by environmental conditions, especially temperature, can be equivalent to or greater than the ones produced by damage. Therefore, it is necessary to distinguish the variations in structural properties caused by environmental changes from those caused by structural damages. In this paper, we present a review of the technical literature concerning variations in the vibration properties of civil structures under varying temperature conditions and damage identification methods for bridge structures. First, the literature on the effect of temperature on vibration properties is roughly divided into experimental and theoretical studies. According to the classification of theoretical research methods, the progress in research on the probability analysis method, the artificial intelligence method, and the optimization algorithm method in this field is reviewed. Based on the different methods of experimental research employed in this field, the experimental research is reviewed according to qualitative and quantitative analyses. Then, damage identification methods for bridge structures are reviewed, considering data-based and model-based methods. Finally, different research methods are summarized. Full article

(This article belongs to the Special Issue Advanced Studies of Risk Resistant Building Structures)

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