节段拼装桥墩拟静力试验研究  

Pseudo Static Test Investigation on segmental precast erected Prestressed Columns

作　　者：赵宁[1] 魏红一[1] 

机构地区：[1]同济大学桥梁工程系

出　　处：《上海公路》2008年第4期24-28,42,共6页Shanghai Highways

基　　金：国家自然科学基金项目(50508032)

摘　　要：采用拟静力试验方法比较承插式和节段式两种预制拼装桥墩在循环荷载作用下的滞回曲线、骨架曲线、延性性能、耗能能力、残余变形和墩柱曲率分布的异同。试验结果表明:预应力筋提高了构件的自复位能力,而耗能能力降低;承插式构件破坏形态是弯曲为主的延性破坏,骨架曲线具有强度稳定段,水平抗力和耗能能力较优;节段式构件集中在节缝区域破坏,残余位移比承捅式构件小得多。Pseudo static test was employed under cyclic loading to investigate the seismic performance of two types of precast columns: spigot-and-socket type and segmental type.Comparison aspects include hysteresis loops,skeleton curve,ductility,dissipation capability,residual displacement and column curvature distribution.Experimental results show that columns' self-centering ability is improved while dissipation capability is reduced because of prestressed tendons;spigot-and-socket columns demonstrate flexible failure mechanism,skeleton curves possess strength stable section,and horizontal resistance and dissipation capability are superior; segmental columns' failure focuses on the segmental joints and residual displacement is much smaller than that of spigot-and-socket type.

关 键 词：节段拼装桥墩 拟静力试验 抗震性能 滞回曲线 残余位移 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] U446.1[交通运输工程—道路与铁道工程]