长联大跨连续梁桥锁死销减震布设方法研究  

Installation method study of locking dowel for long span and long unit continuous beams bridges

作　　者：陈士通[1,2] 张文学[2] 杜修力[2] 李义强[1] Chen Shitong Zhang Wenxue Du Xiuli Li Yiqiang(Hebei Engineering Research Center for Traffic Emergency and Guarantee, Shijiazhuang Tiedao University, Shijiazhuang 050043, China College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China)

机构地区：[1]石家庄铁道大学河北省交通应急保障工程技术研究中心,河北石家庄050043 [2]北京工业大学建筑工程学院,北京100124

出　　处：《华中科技大学学报（自然科学版）》2016年第12期50-55,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51678376;51378034);北京市自然科学基金资助项目(8122007)

摘　　要：为明确长联大跨连续梁桥应用锁死销减震的布设方法,以某铁路主桥(62.5+5×96+62.5)m连续梁桥为工程背景,利用ANSYS建立整体有限元模型,以四种地震波为激励源,对不同锁死销布设数量连续梁桥的地震响应进行非线性时程分析,探求连续梁桥滑动墩墩顶锁死销布设数量的取值范围,进一步以不同墩高、不同跨数的连续梁桥为研究对象,对研究所得锁死销布设数量取值范围进行适用性分析,并研究了锁死销最佳布设位置.结果表明:长联大跨连续梁桥利用锁死销减震可明显改善连续梁桥抗震性能,锁死销布设数量取值范围较为宽泛.当锁死销布设数量小于墩台数量时,在固定墩两侧及紧邻端部墩台的桥墩上进行锁死销布设可取得最佳减震效果.In order to define the installation method of locking dowel for long span and long unit con-tinuous beams bridges ,the dynamic finite element model was built using the ANSYS with a railway bridge as the practical engineering example ,which has a main bridge of （62.5＋5 x 96＋62.5）m .The four seismic wave were taken as excited wave and the non-linear dynamic time-history analysis was conducted ,then the seismic response of continuous beams bridges with the different locking dowel a-mount were compared and illustrated .The amount range of locking dowel was developed based on the analysis results and the amount range was verified in continuous beams bridges with different height and different span .Finally ,the optimal installation placement was studied base on the simulation a-nalysis results .The results show that the locking dowel can significantly improve the seismic perform-ance of long span and long unit continuous beams bridges ,and the installation number of locking dow-el can be selected in a wider range .When the number of locking dowel is less than the number of pier , the locking dowel is designed to be installed on the pier on both sides of fixed-pier and adjacent side pier can obtain the optimal damping effect .

关 键 词：连续梁桥 锁死销 减震装置 地震响应 抗震性能 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]