单双向压弯作用下矩形空心桥墩抗震性能比较  

Comparison of seismic performance of rectangular hollow bridge piers between uniaxial and biaxial compression- bending actions

作　　者：赵彦[1,2] 杜敏[1,2] 温立平[1] 

机构地区：[1]防灾科技学院,河北三河065201 [2]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：《世界地震工程》2014年第1期62-68,共7页World Earthquake Engineering

基　　金：中央高校基本科研业务费青年教师资助计划项目(ZY20130206);河北省教育厅科学研究计划项目(Z2011105)

摘　　要：通过恒定轴力下的水平单向加载拟静力试验和双向加载拟静力试验,研究了矩形空心桥墩在单、双向压弯作用下抗震性能的差异,重点比较了其在不同加载条件下的受力过程、破坏机理、滞回特性、承载能力、延性和耗能能力。结果表明:单、双向压弯作用下,各矩形空心截面试件的破坏形态均为整体弯曲破坏,但在双向耦合作用影响下,双向压弯墩柱的承载能力、变形能力、延性严重削弱,双向压弯墩柱的累积总耗能也远小于单向压弯墩柱。初步研究结果显示,仅考虑水平单向地震作用情形分析矩形空心桥墩的抗震能力可能偏于不安全。In order to study the seismic performance of rectangular hollow bridge piers, a quasi-static test under u- niaxial and biaxial compression-bending was conducted. Force process, failure mechanism, hysteretic behavior, load-carrying capacity, ductility and energy dissipation ability of the structure under different loading condition were studied. The results show that, the failure pattern of these specimens were flexural failure mode, but due to the cou- pling effect of bidirectional action on the bridge pier column in biaxial bending, the load-carrying capacity, deform- ability, ductility and energy dissipation ability were severely weakened. Based on the preliminary results, the study on seismic p,~rformance of rectangular hollow bridge piers is probably unsafe if we consider the piers only with uni- axial compression-bending.

关 键 词：空心桥墩 双向弯曲 试验研究 抗震性能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]