多阶段抗震设计理论与实践研究  

Study on multi-stage seismic design theory and practice

作　　者：燕斌[1,2] 杜修力[1] 韩强[1] 贾俊峰[1] 田浩 

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京国道通公路设计研究院股份有限公司,北京100053 [3]浙江省交通科学研究所,浙江杭州310006

出　　处：《地震工程与工程振动》2013年第5期241-246,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50908005,51178008,50938006);NSFC-JST国际合作项目(51021140003)

摘　　要：基于桥梁抗震设计基本原则,兼顾静力设计要求,提出了多阶段抗震设计理论,并采用多阶段抗震装置加以实现。以连续梁桥为例,应用多阶段抗震设计理论,分别采用预载弹簧阻尼装置(PSDD)和拉索减震支座(CFAB)进行抗震性能分析,并与不设置多阶段抗震装置情况的地震响应进行了对比。分析结果表明:多阶段抗震设计理论指出桥梁在不同阶段应采用不同的验算方法,统一了静力、动力设计;在大震作用下,PSDD依靠降低结构刚度、增加结构阻尼来降低传至上部结构的地震作用,CFAB依靠支座摩擦降低传至上部结构的地震作用,两种装置均可使桥梁其余构件按强度进行设计,简化了桥梁设计。Based on the bridge seismic design principle and taking into account the static design requirements, multi-stage seismic design theory was proposed, which was achieved by adopting multi-stage seismic device. Setting continuous beam bridge as an example, preloaded spring damper device （PSDD） and cable-sliding friction aseismic bearing （CFAB） were separately adopted by using multi-stage seismic design to analyze seismic performance of bridge, compared to the case that multi-stage seismic device was not employed. It was found： different criteria for bridge should be adopted in different stages based on multi-stage seismic design theory, which unified static design and dynamic design. Under strong earthquake, PSDD could reduce seismic effect to superstructure by reducing stiffness and increasing damper of whole bridge, and CFAB could reduce seismic effect on superstructure by bearing friction. Other components of bridge could be designed mic devices separately, which has simplified the bridge by strength criterion by employing the two multi-stage seis- design.

关 键 词：桥梁工程 多阶段抗震设计理论 非线性动力时程分析 多阶段抗震装置 抗震性能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] P315.92[交通运输工程—道路与铁道工程]