施工缝加固后铁路重力式桥墩的抗震性能试验研究  

Experimental Study on the Seismic Performance ofRailway Gravity Piers with Strengthened Construction Joint

作　　者：郭肖东 陈兴冲[1] 刘正楠[1] GUO Xiao-dong;CHEN Xing-chong;LIU Zheng-nan(School of Civil Engineering,lanzhou Jjiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《兰州交通大学学报》2023年第2期1-6,共6页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(51968039);天津大学-兰州交通大学自主创新基金(2021058)。

摘　　要：为研究施工缝加固后铁路重力式桥墩的抗震性能,选用玄武岩纤维布加固墩身施工缝,采用拟静力试验研究施工缝加固前后桥墩的抗震性能,从加固前后桥墩的破坏特征,滞回曲线和骨架曲线,以及承载力、累积耗能、刚度等指标对桥墩进行抗震性能分析。试验结果表明:采用玄武岩纤维布加固墩身施工缝后,桥墩的破坏面出现在墩底,施工缝区域未发生破坏;与未加固的桥墩相比,施工缝加固后的桥墩的极限承载力、耗能能力和刚度都得到了提升。In order to study the seismic performance of the railway gravity pier with strengthened construc-tion joints,this paper selected basalt fiber reinforced polymer(BFRP)to strengthen the construction joint of the pier.The seismic performance of the pier with construction joints before and after strengthening was tested by using the quasi-static test.The failure characteristics,the hysteresis curve,skeleton curve,and performance index including bearing capacity,energy consumption,and stiffness were analyzed.The ex-perimental results show that the failure location of strengthening by BFRP appears the pier footing without any damage at the construction joint;Compared with the unstrengthened pier,the bearing capacity,energy consumption and stiffness of the strengthening pier has realized an enhancement.

关 键 词：抗震性能 玄武岩纤维布加固 拟静力试验 施工缝 铁路重力式桥墩 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]