地震三要素对拱桥能量响应的影响  

Energy response for arch-bridge influenced by three elements of earthquake

作　　者：禹奇才[1] 禹辉君[1] 刘爱荣[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2012年第4期37-43,共7页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金项目(50978062);广东省科技计划项目(2010A030200014);广州市科技计划项目(2010Y1-C751);广州市属高校科技计划项目(10A005)资助

摘　　要：运用能量方法分析了不同地面运动作用下地震三要素(幅值、持时、频谱特征)对拱桥总输入能量、阻尼耗能、滞回耗能总量分配比例的影响.研究结果表明:拱桥结构的总输入能、滞回耗能和阻尼耗能随地震动幅值的增大而增加,尤其是滞回耗能增长更快;拱桥的总输入能,滞回耗能和阻尼耗能随着地震反应持时的增加而增加,且呈线性变化趋势,但阻尼耗能较之总输入能和滞回耗能增速较小;相同加速度峰值条件下,输入频率集中且震荡幅值较大的地震波,地震输入能、滞回耗能、阻尼耗能相应较大.Energy methods are adopted to analyze the influence of three elements of earthquake （ magnitude, duration, spectral characteristics） to total input energy, damping consumption and hysteretic energy consumption proportion of arch bridge. It is shown that total input energy, hysteretic energy and damping energy increase with the increasing of shaking amplitude, besides, hysteretic energy grows faster than the other two. Total input energy, hysteretic energy and damping energy increase with increasing duration of the reaction, displaying a linear trend. However, the growth rate of damping energy is smaller than that of total input energy and hysteretie energy. In the same conditions of acceleration peak, input energy, damping consumption and hysteretic energy consumption of arch bridge would be bigger while the seismic wave gets a higher input frequency and larger concussion amplitude.

关 键 词：地震三要素 拱桥 能量法 地震能量 

分 类 号：TU311[建筑科学—结构工程]