结构工程师2012，Vol.28Issue(5)：82-88,7.
近场地震作用下采用拉索减震支座桥梁纵向地震响应特性
Influence of Near-Fault Ground Motion Characteristics on Seismic Responses of Continuous Beam Bridges Using Cable-Sliding Friction Aseismic Bearing(CSFAB)
摘要
Abstract
The selected seismic input of Taiwan Chi-Chi near-fault ground motion records are used as input waves. The responses of continuous beam bridges using the cable-sliding friction aseismic bearing( CSFAB) are comprehensively inspected under the consideration of the velocity pulse effect, rupture directivity effect, hanging wall effect in reference of using ordinary pot rubber bearing and lead rubber bearing (LRB) , including the parametric analysis of CSFAB. The calculation shows that the three near-fault ground motion effects would magnify the seismic responses of continuous beam bridges using three different bearings. Compared with LRB, the alleviation of displacement magnification by CSFAB is obvious. It shows the advantage in controlling displacement and ideal regulation of both force and displacement, considering the fact that the displacement is u-sually the key in near-fault seismic design of continuous beam bridges. Better isolation effect can be achieved by adjusting the friction coefficient and cable free distance of CSFAB, and thus the displacement can be limited and failure such as unseating and collision can be prevented.关键词
近场地震/速度脉冲效应/方向性效应/上盘效应/拉索减震支座Key words
near-fault ground motion, velocity pulse effect, rupture directivity effect, hanging wall effect, cable-sliding friction aseismic bearing引用本文复制引用
王江波,贺金海,袁万城..近场地震作用下采用拉索减震支座桥梁纵向地震响应特性[J].结构工程师,2012,28(5):82-88,7.基金项目
国家自然科学基金资助项目(50978194,90915011) （50978194,90915011）
