波纹管连接装配式桥墩抗震性能拟静力试验与数值模拟  

Quasi-static Test and Numerical Simulation Analysis for Seismic Performance of Fabricated Assemble Bridge Piers Base on Bellows Connection

作　　者：包龙生 张远宝 桑中伟 于玲 BAO Long-sheng;ZHANG Yuan-bao;SANG Zhong-wei;YU Ling(School of Transportation Engineering,Shenyang Jianzhu University,Shenyang 110168,Liaoning,China)

机构地区：[1]沈阳建筑大学交通工程学院,辽宁沈阳110168

出　　处：《中国公路学报》2018年第12期242-249,共8页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(51078242);辽宁省自然科学基金项目(201602602);住房和城乡建设部科学技术项目(2016-K2-012);沈阳市科学技术基金项目(F16-095-1-00)

摘　　要：为研究采用灌浆波纹管连接的装配式桥墩与整体现浇桥墩在抗震性能方面的差异,探究地震作用下预制拼装双柱桥墩的力学性能,分析节点的破坏机理,通过拟静力试验获得了灌浆波纹管连接预制拼装装配式桥墩与整体现浇桥墩的位移滞回曲线,并通过对试件进行位移延性分析、耗能能力分析及残余位移分析,对比研究灌浆波纹管连接装配式桥墩与现浇桥墩的抗震性能。研究结果表明:①灌浆波纹管试件与整体现浇试件的试验现象基本一致,装配式试件较整体现浇试件最大承载力降低6.7%;②二者屈服荷载与极限荷载误差均不超过10%,二者屈服位移相同但装配式试件较现浇试件的极限位移降低3%,灌浆波纹管试件的延性系数小于整体现浇试件;③两试件最大残余位移均在55 mm左右,但在相同滞回位移下,灌浆波纹管试件残余位移的产生速率大于现浇试件;④通过积分法对二者耗能能力进行比较,当滞回位移达到80 mm时二者耗能差值最大,为10.87 kN·m,达到最大位移时灌浆波纹管试件比现浇试件总的耗能能力小10%左右。可见在同样的设计参数情况下,保证装配式桥墩拼装接头的强度可靠性,基本能够达到现浇桥墩所要求的各项性能。The purpose of this work was to study the difference in seismic performance between assembled piers connected with grouting bellows and overall cast-in-place piers;the mechanical properties of prefabricated two-column piers were explored under earthquake action, and the damage mechanism of the nodes were observed. The displacement hysteresis curves of the assembled piers connected with grouting bellows and the overall cast-in-place piers were obtained through a quasi-static test. The contrast study on the seismic performance of assembled piers connected with grouting bellows and cast-in-place piers were conducted via displacement ductility analyses, energy dissipation capacity analyses, and residual displacement analyses of the specimens. The resulting hysteresis curve shows the following: ① The test piece of the grouting bellows is consistent with the overall cast-in-place test piece. The maximum bearing capacity of the assembled specimen is 6.7% lower than that of the cast-in-place test piece. ② The two skeleton curves show that the errors of yield load and ultimate load are less than 10%;the yield displacement is the same but the limit displacement of the assembly specimen is 3% lower than that of the cast-in-place test piece;the ductility coefficient of the grouting bellows specimen is less than that of the overall cast-in-place test piece. ③The residual displacement shows that the maximum residual displacements of both specimens are approximately 55 mm, but the corrugated pipe grouting specimen's residual displacement rate is greater than that of the cast-in-place specimen;the residual displacement of the cast-in-place specimen is approximately 90% of that of the grouting bellows test piece under the same hysteresis displacement. ④By means of the integral method, the energy dissipation capacity of the two test specimens can be compared. When the hysteresis displacement reaches 80 mm, the energy dissipation value is maximal, which is equal to 10.87 kN·m, and the total energy dissipation capacity of t

关 键 词：桥梁工程 装配式桥墩 拟静力试验 抗震性能 灌浆波纹管连接 数值分析 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]