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seismic performance of precast bridge columns connected with grouted corrugated-metal duct through biaxial quasi-static experiment and modeling

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Earthquake Engineering and Engineering Vibration 2021年第3期20卷 747-770页

作者： Xia Zhanghua Lin Shangshun He Yongbo Ge Jiping Sun Jinlei Department of Civil Engineering Fuzhou UniversityFuzhou 350116China Department of Civil Engineering Fujian University of TechnologyFuzhou 350116China Department of Civil Engineering Shanghai Institute of TechnologyShanghai 201418China

In this paper,the seismic behaviors of precast bridge columns connected with grouted corrugated-metal duct(GCMD)were investigated through the biaxial quasi-static experiment and numerical *** a geometric scale ratio of 1:5,five specimens were fabricated,including four precast bridge columns connected with GCMD and one cast-in-place(CIP)bridge column.A finite element analysis model was also established by using OpenSees and was then calibrated by using the experimental results for parameter *** results show the biaxial seismic performance of the precast bridge columns connected with GCMD was similar to the CIP bridge columns regarding ultimate bearing capacity and hysteresis energy,and further,that it could meet the design goal of equivalent *** seismic performance of the precast bridge columns connected with GCMD deteriorated more significantly under bi-directional load than under uni-directional load.A proper slenderness ratio(e.g.,7.0-10.0)and longitudinal reinforcement ratio could significantly improve the energy dissipation capacity and deformation capacity of the precast bridge columns,while the axial load ratio and concrete strength had little influence on the above *** research results could bring insights to the development of the seismic design of precast bridge columns connected with GCMD.

关键词： precast bridge column cast-in-place column grouted corrugated-metal duct connection biaxial quasi-static test seismic performance hysteresis energy

seismic performance evaluation of VCFPB isolated storage tank using real-time hybrid simulation

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Earthquake Engineering and Engineering Vibration 2022年第2期21卷 501-515页

作者： Hong Yue Tang Zhenyun Li Zhenbao Du Xiuli The Key Laboratory of Urban Security and Disaster Engineering Ministry of EducationBeijing University of TechnologyBeijing 100124China Daxing District Commission of Housing and Urban-Rural Development Beijing 102600China

Variable curvature friction pendulum bearings(VCFPB)effectively reduce the dynamic response of storage tanks induced by *** table testing is used to assess the seismic performance of VCFPB isolated storage ***,the vertical pressure and friction coefficient of the scaled VCFPB in the shaking table tests cannot match the equivalent values of these parameters in the *** avoid this drawback,a real-time hybrid simulation(RTHS)test was *** RTHS testing,a 1/8 scaled tank isolated by VCFPB was *** experimental results showed that the displacement dynamic magnification factor of VCFPB,peak reduction factors of the acceleration,shear force,and overturning moment at bottom of the tank,were negative exponential functions of the ratio of peak ground acceleration(PGA)and friction *** peak reduction factors of displacement,acceleration,force and overturning moment,which were obtained from the experimental results,are compared with those calculated by the Housner *** can be concluded that the Housner model is applicable in estimation of the acceleration,shear force,and overturning moment of liquid storage tank,but not for the sliding displacement of VCFPBs.

关键词： liquid storage tank base isolation variable curvature friction pendulum bearing seismic performance real-time hybrid simulation test

seismic performance and global ductility of RC frames rehabilitated with retrofi tted joints by CFRP laminates

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Earthquake Engineering and Engineering Vibration 2014年第1期13卷 59-73页

作者： M.Fakharifar M.K. Sharbatdar Z.Lin A.Dalvand A.Sivandi-Pour G.Chen Department of Civil Architectural and Environmental EngineeringMissouri University of Science and Technology Department of Civil Engineering Semnan University Department of Civil and Environmental Engineering North Dakota State University

This paper presents a new FRP retrofi tting scheme to strengthen local beam-column joints in reinforced concrete(RC) *** new retrofi tting scheme was proposed following a preliminary study of four different existing retrofi tting schemes.A numerical simulation was conducted to evaluate the effectiveness of FRP-strengthened reinforced concrete frames by bridging behavior of local joints to the whole *** confi nement effects due to varying retrofi tting schemes in the joints were simulated in the frame *** seismic behavior factor was used to evaluate the seismic performance of the strengthened RC *** results demonstrated that the new proposed retrofi tting scheme was robust and promising,and fi nite element analysis appropriately captured the strength and global ductility of the frame due to upgrading of the local joints.

关键词： beam-column joints behavior factor retrofit FRP dynamic analysis seismic performance

seismic performance evaluation of an infilled rocking wall frame structure through quasi-static cyclic testing

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Earthquake Engineering and Engineering Vibration 2018年第2期17卷 371-383页

作者： Pan Peng Wu Shoujun Wang Haishen Nie Xin Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry Department of Civil Engineering Tsinghua University Department of Civil Engineering Tsinghua University

Earthquake investigations have illustrated that even code-compliant reinforced concrete frames may suffer from soft-story *** damage mode results in poor ductility and limited energy *** components offer alternatives that may avoid such failures.A novel infilled rocking wall frame system is proposed that takes advantage of continuous component and rocking *** studies have investigated similar systems that combine a reinforced concrete frame and a wall with rocking behavior ***,a large-scale experimental study of a reinforced concrete frame combined with a rocking wall has not been *** this study,a seismic performance evaluation of the newly proposed infilled rocking wall frame structure was conducted through quasi-static cyclic *** joints were designed and *** models were established and calibrated to estimate frame shear *** results evaluation demonstrate that an infilled rocking wall frame can effectively avoid soft-story *** and initial stiffness are greatly improved and self-centering behavior is achieved with the help of the infilled rocking *** distribution becomes more uniform with *** cracks and damage occurs in desired *** infilled rocking wall frame offers a promising approach to achieving seismic resilience.

关键词： infilled rocking wall frame seismic performance displacement distribution quasi-static cyclic test

seismic performance of fabricated continuous girder bridge with grouting sleeve-prestressed tendon composite connections

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Frontiers of Structural and Civil Engineering 2023年第6期17卷 827-854页

作者： Jin WANG Weibing XU Xiuli DU Yanjiang CHEN Mengjia DING Rong FANG Guang YANG School of Water Resources and Hydropower Engineering North China Electric Power UniversityBeijing102206China Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit Beijing University of TechnologyBeijing100124China Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education Beijing University of TechnologyBeijing100124China

The seismic performance of a fully fabricated bridge is a key factor limiting its *** this study,a fiber element model of a fabricated concrete pier with grouting sleeve-prestressed tendon composite connections was built and verified.A numerical analysis of three types of continuous girder bridges was conducted with different piers:a cast-in-place reinforced concrete pier,a grouting sleeve-fabricated pier,and a grouting sleeve-prestressed tendon composite fabricated ***,the seismic performance of the composite fabricated pier was *** results show that the OpenSees fiber element model can successfully simulate the hysteresis behavior and failure mode of the grouted sleeve-fabricated *** traditional non-near-fault ground motions,the pier top displacements of the grouting sleeve-fabricated pier and the composite fabricated pier were less than those of the cast-in-place reinforced concrete *** composite fabricated pier had a good self-centering *** addition,the plastic hinge zones of the grouting sleeve-fabricated pier and the composite fabricated pier shifted to the joint seam and upper edge of the grouting sleeve,*** composite fabricated pier with optimal design parameters has good seismic performance and can be applied in high-intensity seismic areas;however,the influence of pile-soil interaction on its seismic performance should not be ignored.

关键词： seismic performance continuous girder bridge grouting sleeve-prestressed tendon composite connections grouted sleeve connection design parameters

seismic performance of cable-sliding friction bearing system for isolated bridges

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Earthquake Engineering and Engineering Vibration 2012年第2期11卷 173-183页

作者： Cheung Pakchiu State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University

During past strong earthquakes, highway bridges have sustained severe damage or even collapse due to excessive displacements and/or very large lateral forces. For commonly used isolation bearings with a pure friction sliding surface, seismic forces may be reduced but displacements are often unconstrained. In this paper, an alternative seismic bearing system, called the cable-sliding friction bearing system, is developed by integrating seismic isolation devices with displacement restrainers consisting of cables attached to the upper and lower plates of the bearing. Restoring forces are provided to limit the displacements of the sliding component. Design parameters including the length and stiffness of the cables, friction coefficient, strength of the shear bolt in a fixed-type bearing, and movements under earthquake excitations are discussed. Laboratory testing of a prototype bearing subjected to vertical loads and quasi-static cyclic lateral loads, and corresponding numerical finite element simulation analysis, were carried out. It is shown that the numerical simulation shows good agreement with the experimental force-displacement hysteretic response, indicating the viability of the new bearing system. In addition, practical application of this bearing system to a multi-span bridge in China and its design advantages are discussed.

关键词： isolated bridge cable-sliding friction bearing isolation device seismic performance restrained displacement earthquake damage

seismic performance evaluation of hybrid coupled shear wall system with shear and flexural fuse-type steel coupling beams

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 691-712页

作者： Zahra Ramezandoust Abbas Tajaddini Panam Zarfam Department of Civil Engineering Science and Research branchIslamic Azad UniversityTehran 14778-93855Iran Department of Civil Engineering Karaj BranchIslamic Azad UniversityKaraj 31485-313Iran

Replaceable flexural and shear fuse-type coupling beams are used in hybrid coupled shear wall(HCSW)systems,enabling concrete buildings to be promptly recovered after severe *** study aimed to analytically evaluate the seismic behavior of flexural and shear fuse beams situated in short-,medium-and high-rise RC buildings that have *** building groups hypothetically located in a high seismic hazard zone were studied.A series of 2D nonlinear time history analyses was accomplished in OpenSees,using the ground motion records scaled at the design basis earthquake *** was found that the effectiveness of fuses in HCSWs depends on various factors such as size and scale of the building,allowable rotation value,inter-story drift ratio,residual drift quantity,energy dissipation value of the fuses,*** results show that shear fuses better meet the requirements of rotations and *** contrast,flexural fuses dissipate more energy,but their sectional stiffness should increase to meet other *** was concluded that adoption of proper fuses depends on the overall scale of the building and on how associated factors are considered.

关键词： hybrid coupled shear wall steel fuse coupling beam shear and flexural fuse nonlinear dynamic analysis seismic performance

seismic performance of Assembled Shear Wall with Defective Sleeve Connection

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Computer Modeling in Engineering & Sciences 2022年第4期131卷 199-217页

作者： Hua Yan Bo Song Dongsheng Xu Guodong Zhang School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China School of Architecture and Engineering Langfang Normal UniversityLangfang065000China Beijing International Science and Technology Cooperation Base for Earthquake Research on Mass Transit Railway Project Beijing100083China

In this paper,three kinds of shear walls with full sleeve grouting,fully defective sleeve and partially defective are designed for finite element analysis to analyze the influence of defects on the seismic performance of shear *** research shows that at the beginning of loading(5 s),the three models begin to appear compressive damage at the bottom of the wall in all three *** damage of the defect-free model develops rapidly,and the damage of the fully defective model is basically the same as that of the partially defective *** the gradual increase of displacement control(15 s),the compressive damages at the foot of the wall in the defect-free and partially defective grouting model are obvious,with plastic hinge formed in the foot of the wall,and the phenomenon of development along the pier body showing *** the structure is damaged,the overall compressive damages of the wall in the defect-free and partially defective models are obvious,and the damage on the defective side of the partially defective model is slightly *** the maximum stress of pre-stressed reinforcement in the defect-freemodel is concentrated at the top of the sleeve,themaximumstress of the pre-stressed steel bar in the fully defective model appears at the end of the steel bar in the *** hysteresis curve shape of the non-defectmodel and partially defective model are basically the same,showing a“shuttle”shape with a sound energy dissipation *** hysteresis curve shape of the fully defective model appears an obvious“pinch”*** yield displacement levels of the defect-free and partially defective models are smaller than that of the fully defective model *** stiffness degradation curves of the three models basically overlap with one *** the limit displacement,the stiffness results of the non-defect model and the partially defective model are greater than that of the fully defective *** the displacement is loaded to 20 mm,

关键词： Grouting sleeve defects shear wall finite element analysis seismic performance

seismic performance evaluation of innovative balloon type CLT rocking shear walls

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Resilient Cities and Structures 2022年第1期1卷 44-52页

作者： T.Y.Yang S.Lepine-Lacroix J.A.Ramos Guerrero J.B.W.McFadden M.A.Q.Al-Janabi Department of Civil Engineering The University of British ColumbiaVancouverCanada Canadian Construction Materials Center National Research Council CanadaOttawaCanada Department of Civil Engineering Al-Nahrain UniversityBaghdadIraq

Balloon type cross laminated timber(CLT)rocking shear walls are a novel seismic force resisting *** this paper,the seismic performance of four 12-story balloon type CLT rocking shear walls,designed by a structural engineering firm located in Vancouver(Canada)using the performance-based design procedure outlined in the technical guideline published by the Canadian Construction Materials center(CCMC)/National Research Council Canada(NRC),is *** seismic performance of the prototype CLT rocking shear walls was investigated using nonlinear time history *** nonlinear finite element models were developed using OpenSees and the nonlinear behavior of the displacement-controlled components was calibrated using available experimental data.A detailed site-specific hazard analysis was conducted and sets of ground motions suitable for the prototype buildings were *** ground motions were used in a series of incremental dynamic analyses(IDAs)to quantify the adjustable collapse margin ratio(ACMR)of the prototype balloon type CLT rocking shear *** results show that the prototype balloon type CLT rocking shear walls designed using the performance-based design procedure outlined in the CCMC/NRC technical guideline have sufficient ACMR when compared to the acceptable limits recommended by FEMA P695.

关键词： Cross-laminated timber Rocking shear walls seismic performance CLT shear walls