Evaluation of Seismic Performance of Long Span Continuous Girder Bridges in Regions with IX Intensity

摘要：

Nonlinear time history analysis method is adopted to analysis the seismic performance of long span continuous girder bridges with spans of 89, 170 and 89 m in high intensity region. Seismic isolation devices of double curvature seismic isolation bearings (DCSIB) and longitudinal dampers between abutments and main girders are adopted to reduce seismic response. Compares to other kinds of bearings, the self-restoring ability of DCSIB can prevent the displacement added in aftershock exceeding the maximum structure displacement admitted. The good hysteretic, energy-dissipation characteristic and self-restoring ability of DCSIB are considered as well as the friction energy-dissipation characteristic of sliding bearing and damping energy-dissipation characteristic of dampers. Based on above 3D dynamic model the analytical results indicate that the structure seismic response is reduced evidently after the usage of seismic isolation devices; seismic performance can basically meet the expected design goal. So it is very effective that seismic isolation devices of DCSIB and dampers can adjust dynamic characteristic, reduce seismic response, dissipate earthquake energy and guarantee the structural safety.

关键词： Long span continuous girder bridge Double curvature seismic isolation bearings Dampers Nonlinear time history analysis Seismic performance

作者: Zhenxin Li Gao Liu Du Wu

作者单位: Bridge Technology Development Center, CCCC Highway Consultants CO., Ltd., China Engineering, Bridge Technology Development Center, CCCC Highway Consultants CO., Ltd., China

会议类型: 国际会议

会议名称: The First Anniversary of Wenchuan Earthquake(纪念汶川地震一周年国际学术会议)

会议地点: 成都

会议语种:英文

页码: 535-538

在线出版日期: 2009-05-10（万方平台首次上网日期，不代表论文的发表时间）