曲线桥梁摩擦滑移隔震性能分析及试验研究  

Analysis and experimental study on performance of curved bridge sliding seismic isolation

作　　者：李青宁[1] 程麦理 尹俊红[1] 闫磊[1] 廖鑫[1] 

机构地区：[1]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》2017年第1期34-40,共7页World Earthquake Engineering

基　　金：国家自然科学基金项目(51078306);高等学校博士学科点专项科研基金项目(20106120110004);陕西省自然科学基础研究计划资助项目(2013JQ7007)

摘　　要：为探讨曲线桥梁的隔震性能,应用摩擦滑移隔震理论,研究了摩擦滑移隔震橡胶支座在两种典型工作状态下支座的受力、变形和位移关系,建立了摩擦滑移本构关系,推导并分析了摩擦滑移支座的计算方法和耗能机理。结合振动台试验,分析了不同场地类型地震波、不同等级加速度荷载对不同刚度桥墩的破坏规律及隔震效果的影响。研究表明,桥墩裂缝开展主要以弯曲裂缝为主,桥墩刚度对裂缝开展部位影响较大;支座以剪切破坏为主;强震作用下,主梁加速度响应与地震波类型基本无关,而与支座和主梁间的摩擦系数有关;随着荷载等级的增大,摩擦滑移隔震支座的隔震效率提高。To investigate the isolation performance of curved bridge, applying the friction sliding isolation theory, we researched stress, deformation and displacement relationship of friction sliding isolation rubber bearing under two kinds of typical work state, established the constitutive relationship of sliding friction, deduced and analyzed the calculation method and energy dissipation mechanism of friction sliding bearing, Combined with the shaking table test, we analyzed the influence of different site types of seismic wave, different grades of acceleration load on the failure regularity and isolation effect of piers with different stiffnesses. Researches show that, the pier cracks are mainly bending cracks, pier stiffness has more obvious influence on the crack location;bearings mainly display shear failure ; under action of strong earthquakes, the acceleration response of girder is basically independent of seismic wave types, and related with the friction coefficient between bearing and girder;with the increase of load level, the efficiency of friction sliding isolation bearing increases.

关 键 词：曲线桥梁 摩擦滑移 本构关系 振动台试验 动力响应 

分 类 号：TU997[建筑科学—市政工程]