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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 637-648页

作者： Lulu Yan Ding-Hao Yu Research Center for Geotechnical and Structural Engineering Technology of Liaoning Province Dalian UniversityDalian116622China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

In this study,a novel equivalent damping ratio model that is suitable for reinforced concrete(RC)structures considering cyclic degradation behavior is developed,and a new equivalent linearization analysis method for implementing the proposed equivalent damping ratio model for use in seismic damage evaluation is *** this end,Ibarra’s peak-oriented model,which incorporates an energy-based degradation rule,is selected for representing hysteretic behavior of RC structure,and the optimized equivalent damping for predicting the maximum displacement response is presented by using the empirical method,in which the effect of cyclic degradation is ***,the relationship between the hysteretic energy dissipation of the inelastic system and the elastic strain energy of the equivalent linear system is established so that the proposed equivalent linear system can be directly integrated with the Park-Ang seismic model to implement seismic damage *** to the simplicity of the equivalent linearization method,the proposed method provides an efficient and reliable way of obtaining comprehensive insight into the seismic performance of RC *** verification demonstrates the validity of the proposed method.

关键词： degrading system equivalent linear system equivalent damping seismic damage RC structures

seismic damage analysis of the outlet piers of arch dams using the finite element sub-model method

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Earthquake Engineering and Engineering Vibration 2016年第3期15卷 617-626页

作者： Song Liangfeng Wu Mingxin Wang Jinting Xu Yanjie State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China Three Gorges International Tendering Co.Ltd. Beijing 100038China

This study aims to analyze seismic damage of reinforced outlet piers of arch dams by the nonlinear finite element （FE） sub-model method. First, the dam-foundation system is modeled and analyzed, in which the effects of infinite foundation, contraction joints, and nonlinear concrete are taken into account. The detailed structures of the outlet pier are then simulated with a refined FE model in the sub-model analysis. In this way the damage mechanism of the plain （unreinforced） outlet pier is analyzed, and the effects of two reinforcement measures （i.e., post-tensioned anchor cables and reinforcing bar） on the dynamic damage to the outlet pier are investigated comprehensively. Results show that the plain pier is damaged severely by strong earthquakes while implementation of post-tensioned anchor cables strengthens the pier effectively. In addition, radiation damping strongly alleviates seismic damage to the piers.

关键词： arch dam outlet pier seismic damage reinforcement measure FE sub-model method

seismic damage of highway bridges during the 2008 Wenchuan earthquake

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Earthquake Engineering and Engineering Vibration 2009年第2期8卷 263-273页

作者： Han Qiang Du Xiuli Liu Jingbo Li Zhongxian Li Liyun Zhao Jianfeng Lab. of Urban Security ＆ Dixaster Engineering of MOE Beijing University of Technology Beijing 100124 China Key Department of Civil Engineering Tsinghua University Belling 100084 China College of Civil Engineering Tianjin University Tianjin 200072 China College of Civil Engineering Qingdao Technological University Qingdao 266033 China

Many highway bridges were severely damaged or completely collapsed during the 2008 Wenchuan earthquake. A field investigation was carried out in the strongly affected areas and over 320 bridges were examined. damage to some representative highway bridges is briefly described and a preliminary analysis of the probable causes of the damage is presented in this paper. The most common damage included shear-flexural failure of the pier columns, expansion joint failure, shear key failure, and girder sliding in the transversal or longitudinal directions due to weak connections between girder and bearings. Lessons learned from this earthquake are described and recommendations related to the design of curved and skewed bridges, design of bearings and devices to prevent girder collapse, and ductility of bridge piers are presented. Suggestions for future seismic design and retrofitting techniques for bridges in moderate to severe earthquake areas are also proposed.

关键词： Wenchuan earthquake seismic damage seismic design highway bridge field investigation

A macro-level global seismic damage model considering higher modes

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Earthquake Engineering and Engineering Vibration 2014年第3期13卷 425-436页

作者： He Zheng Ou Xiaoying Ou Jinping Department of Civil Engineering Dalian University of Technology School of Civil Engineering Harbin Institute of Technology

For modal pushover analysis procedures, the model proposed by Ghobarah et al. （called the G model hereafter, 1999） has been extended to account for the contributions of transient higher modes to global seismic damage of structures excited by strong ground motions. The proposed model has physically and perfectly bridged the G model and the final softening model proposed by DiPasquale and Cakmak （1988）. Modal damage indexes corresponding to all considered vibration modes are combined by the CQC rule or the SRSS rule. Incremental dynamic analysis （IDA） is performed on three example RC frames to validate the proposed model, and a comprehensive comparison is carried out. The demonstration indicates that the proposed model is easy to implement and reflects the influence of the transition in transient vibration periods and modes on structural damage evolution. Some limitations associated with the proposed model are also addressed. Further experimental validations are needed to improve the model in the future.

关键词： seismic damage modal pushover analysis incremental dynamic analysis

Preliminary investigation of seismic damage to two steel space structures during the 2013 Lushan earthquake

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Earthquake Engineering and Engineering Vibration 2013年第3期12卷 497-500页

作者： Dai Junwu Qu Zhe Zhang Chenxiao Weng Xuran Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsCEA

Severe damage to steel space structures is rarely reported when compared to other structural systems damaged during past major earthquakes around the world. Two gymnasiums of steel space structures in downtown Lushan County that were damaged during the 2013 M7.0 Lushan earthquake in China were investigated and the observations are summarized in this paper. Typical damage to these two steel space structures ranges from moderate to severe. Moderate damage includes global buckling and dislocation of bolted connections of truss members, and inelastic elongation of anchor bolts and sliding of pedestal plates of supports. Severe damage includes member fracture caused by local buckling, and fracture failure of anchor bolts and welds. The distribution of structural damage to these two structures is described in detail and future research opportunities are suggested.

关键词： Lushan earthquake steel space structure gymnasitun seismic damage member buckling fracture failure

Online location of seismic damage to a water distribution system

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Earthquake Engineering and Engineering Vibration 2003年第2期2卷 181-187页

作者：梁建文 Department of Civil Engineering Tianjin UniversityTianjin 300072China Professor

As one of the most important urban lifeline systems,a water distribution system can be damaged under a strong earthquake,and the damage cannot easily be located,especially immediately after the *** often causes tremendous difficulties to post-earthquake emergency response and recovery *** paper proposes a methodology to locate seismic damage to a water distribution system by monitoring water head online at some nodes in the water distribution *** artificial neural network-based inverse analysis method is developed to estimate the water head variations at all nodes that are not monitored based on the water head variations at the nodes that are *** methodology provides a quick,effective,and practical way to locate seismic damage to a water distribution system.

关键词： water distribution system seismic damage break location extent of damage online artificial neural network technique

Effect of Lead-Rubber Bearing Isolators in Reducing seismic damage for a High-Rise Building in Comparison with Normal Shear Wall System

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Structural Durability & Health Monitoring 2021年第3期15卷 247-260页

作者： Mahmoud Fakih Jaafar Hallal Hassan Darwich Hala Damerji Faculty of Engineering Lebanese UniversityBeirutLebanon Laboratory of Composite Materials for Construction(LMC2) University of LyonLyonFrance Faculty of Engineering ArtsSciences and Technology University in LebanonBeirutLebanon

seismic earthquakes are a real danger for the construction evolution of high rise *** rate of earthquakes around the world is noteworthy in a wide range of construction *** this study,we present the dynamic behavior of a high-rise RC building with dynamic isolators(lead-rubber-bearing),in comparison with a traditional shear wall system of the same *** isolation has been introduced in building construction to increase the structural stability and to protect the non-structural components against the damaging effects of an *** order to clarify the influence of incorporating lead rubber bearing isolators in the seismic response and in reducing seismic damages;a comparative study is performed between a fixed base system(shear wall system)and an isolated base system(Lead Rubber Bearing)on an irregular high rise reinforced concrete(RC)building located in Beirut consisting of 48 storeys almost asymmetric *** this purpose,a non-linear analysis of a real earthquake acceleration record(EI Centro seismic signal)is conducted,so that the mode shapes,the damping ratio and the natural frequencies of the two models are obtained using ETABS *** results prove a substantial elongation of the building period,as well as a reduction in the building displacement,the roof acceleration,the inter-storey drift ratio and the base shear force of isolated building relative to fixed-base *** study proves that this technology is applicable to high rise buildings with acceptable results.

关键词： seismic damage non-linear time history analysis high-rise RC building seismic response analysis lead rubber bearing

Field survey and analysis on near-fault severely damaged high-speed railway bridge in 2022 M6.9 Menyuan earthquake

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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 1043-1055页

作者： Lin Xuchuan Liu Fuxiang Shan Wenchen Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China Institute of Smart City and Intelligent Transportation Southwest Jiaotong UniversityChengdu610000China

The 2022 M6.9 Menyuan earthquake caused severe damage to a high-speed railway bridge,which was designed for high-speed trains running at speeds of above 250 km/h and is located right next to the *** of this type have been widely used for rapidly constructing the high-speed railway network,but few bridges have been tested by near-fault devastating *** potential severe impact of the earthquake on the high-speed railway is not only the safety of the infrastructure,trains and passengers,but also economic loss due to interrupted railway ***,a field survey was carried out immediately after the earthquake to collect time-sensitive *** damage to the bridge was carefully investigated,and quantitative analyses were conducted to better understand the mechanism of the bridge *** was found that seismic action perpendicular to the bridge’s longitudinal direction caused severe damage to the girders and rails,while none of the piers showed obvious deformation or *** maximum values of transverse displacement,out-of-plane rotation and twisting angle of girders reached 212.6 cm,3.1 degrees and 19.9 degrees,respectively,causing severe damage to the bearing supports and anti-seismic retaining *** observations provide a basis for improving the seismic design of high-speed railway bridges located in near-fault areas.

关键词： Menyuan earthquake field survey high-speed railway bridge near fault seismic damage

seismic design analysis of the country masonry school buildings in the meizoseismal area

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Earthquake Engineering and Engineering Vibration 2011年第3期10卷 359-367页

作者： Feng Yuan Yi Dan Bi Qiong China Southwest Architecture Design ＆ Research Institute Chengdu 610042 China

Several reinforcing schemes are illustrated that are based on the loading characteristics of typical country masonry school buildings with sparsely spaced transversal walls and large depth. From the seismic damage observed following the Wenchuan Earthquake, the effects of reinforcing schemes, tie-columns and tie-beams on the seismic resistance of masonry buildings are analyzed. The concept of improving the ductility of these types of buildings is presented. Finally, some suggestions are proposed for the design of masonry buildings with sparsely spaced transversal walls and large depth.

关键词： masonry school buildings tie-columns tie-beams ductility wall between the windows Wenchuan earthquake seismic damage

seismic performance of buildings during 2011 Van earthquakes and rebuilding efforts

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Earthquake Engineering and Engineering Vibration 2016年第3期15卷 591-606页

作者： Ufuk Yazgan Resat Oyguc M. Ertac Erguven and Zekai Celep Earthquake Engineering and Disaster Management Institute Istanbul Technical University Istanbul Turkey Department of Civil Engineering Faculty of Civil Engineering Istanbul Technical University Istanbul Turkey

The October 23, 2011 M7.2 Tabanli - Van and November 9, 2011 M5.2 Edremit - Van earthquakes caused damage in a widespread area across the Van province in Turkey. The ground motions, the damage caused by these earthquakes and the recent progress related to recovery efforts are presented herein. First, the key properties of the recorded strong ground motions like spectral amplitudes and directionality are evaluated. The observed damage in the affected reinforced concrete and masonry structures are discussed. The set of common structural damage mechanisms （i.e., soft story failure, torsional response due to plan irregularity, short column failure, pull out failure, pounding） observed in the damaged buildings were identified. The relationship between the key structural properties and the extent of damage is investigated. The primary loss drivers across the region were identified to be the poor quality of workmanship and improper use of building materials. The results from the investigation suggest that a large portion of the loss could have been prevented if sufficient attention and care were given to the implementation of the design regulations and in particular to the construction practice. Lastly, the recent progress in the ongoing rebuildin~ activities is presented.

关键词： Van 2011 earthquakes seismic damage reconnaissance survey rebuilding effort