无黏结预应力混凝土桥墩地震损伤破坏的有限元模拟分析  

Finite element simulation analysis of seismic damage of unbonded prestressed reinforced concrete bridge piers

作　　者：孙治国[1] 张震威 王东升 贾俊峰[3] SUN Zhiguo;ZHANG Zhenwei;WANG Dongsheng;JIA Junfeng(Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Institute of Disaster Prevention,Beijing 101601,China;School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;MOE Key Lab of Urban Security and Disaster Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]防灾科技学院中国地震局建筑物破坏机理与防御重点实验室,北京101601 [2]河北工业大学土木与交通学院,天津300401 [3]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

出　　处：《混凝土》2023年第8期1-7,共7页Concrete

基　　金：河北省重点研发计划项目(19275417D,21375405D);国家自然科学基金(51978167);城市与工程安全减灾教育部重点实验室开放课题(2020B01);防灾科技学院研究生创新基金项目(ZY20220308)。

摘　　要：桥墩中配制竖向无黏结预应力筋是实现其地震损伤控制的有效手段,为研究采用ANSYS软件的无黏结预应力筋混凝土桥墩地震损伤破坏分析方法,基于4个桥墩的拟静力试验结果,建立其滞回性能的有限元分析模型,将模拟得到的桥墩混凝土开裂破坏情况、滞回曲线、骨架曲线、残余位移、刚度、预应力筋应力等与试验结果进行了对比。结果表明:数值模拟结果与试验结果吻合较好,基于ANSYS软件可以很好的模拟此类桥墩的地震损伤破坏情况。It is an effective measure for seismic damage control of bridge piers by using vertical unbonded prestressing strands.The finite element model for seismic damage analysis of the pier specimens with unbonded prestressing strands were built by using ANSYS software.The simulated concrete cracking damage,hysteretic curves,skeleton curves,residual drifts,lateral stiffness and strand stress were compared with quasi-static test results of 4 pier specimens.The results show that the numerical simulation results are in good agreement with the experimental results.Based on ANSYS software,the seismic damage of such bridge piers can be simulated well.

关 键 词：钢筋混凝土桥墩 地震损伤控制 无黏结预应力筋 有限元分析 滞回性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]