考虑支座摩擦滑移的非规则曲线桥梁抗震性能研究  

Study on seismic behavior of irregular curved bridges considering bearing friction sliding

作　　者：闫磊 李青宁[2] 刘芳平[1] 申纪伟[1] 程龙飞[1] 杨茂 郭远臣[1] YAN Lei1, LI Qingning2, LIU Fangping1, SHEN Jiwei1, CHENG Longfei1, YANG Mao1, GUO Yuanchen1(1. College of Civil Engineering. Chongqing Three Gorges University, Chongqing 404100, China; 2. College of Civil Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, China)

机构地区：[1]重庆三峡学院土木工程学院,重庆万州404100 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《世界地震工程》2018年第1期87-97,共11页World Earthquake Engineering

基　　金：国家自然科学基金(51078306);国家自然科学基金青年基金(51508453);陕西省自然科学基础研究计划资助项目(2013JQ7007);重庆市教委科技项目(KJ1601017);重庆三峡学院校级重大培育项目(17ZP08;17RC08;17ZZ03);三峡库区地质环境监测与灾害预警创新团队(CXTDX201601034);三峡库区工程结构防灾减灾与安全创新团队

摘　　要：为研究支座摩擦滑移对非规则曲线桥梁抗震性能的影响,建立考虑支座摩擦滑移的非规则桥梁空间耦联模型,研究支座刚度及支座摩擦系数对其地震响应的影响。结果表明:支座摩擦滑移可以明显消耗地震能量,降低墩底弯矩,有效避免桥墩墩底塑性铰的形成;支座摩擦系数和初始刚度的选择对非规则曲线桥梁加速度减震率及梁体位移影响较大,应根据参数最优匹配的方法选取其最优组合。In order to study the seismic behavior of irregular curved bridges considering bearing friction sliding, a space-coupling model concerning bearing friction sliding was constructed, and the impacts of bearing stiffness and frictional ratio on dynamic response of the kind of bridge were studied. Results shows that bearing sliding can largely dissipate seismic energy, reduce bending moment at the bottom of pier, thus avoid the appearance of plastic hinge at the area; the initial bearing stiffness and frictional ratio should be chosen accorrding specific strnetural style, which have a great significance on acceleration shock absorption rate of an irregular curved bridge.

关 键 词：摩擦滑移 耦联模型 加速度 位移 最优匹配 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]