摘要
提出了一种简化的基于单个模态振子振动特性的多支承激励反应谱法。用此方法对公铁两用芜湖长江大桥主航道斜拉桥 ,在多支承激励作用下的地震响应进行了研究 ,其结果与用A DerKiureghian的多支承激励反应谱法 (MSRS)分析的结果符合较好 ,本方法可以节省大量计算工作量。逐项分析了行波效应、空间不相干效应和局部场地效应对斜拉桥地震响应的影响 ,说明了多支承激励地震响应分析 。
A simplified response spectrum method for multi?supported excitations is proposed in the paper It is only based on the characteristics of a single modal vibrator The seismic response analysis of a cable?stayed bridge over Yangtze River at Wuhu is made using the proposed method The results are compared with that of the MSRS method It is shown that the results produced by the two methods are well in agreement with each other, but the proposed method can save much computing time The three effects on seismic response of a cable?stayed bridge, namely as ware passage effect, spatial in coherent effect and local site effent, are studied. It is shown that there are important influences on a long?span cable?stayed bridge subjected to multi?support excitations
出处
《土木工程学报》
EI
CSCD
北大核心
2001年第6期38-44,共7页
China Civil Engineering Journal
基金
铁道部科技发展计划项目(96G35-C)
国家自然科学基金资助项目(59978001)
关键词
多支承激励
反应谱法
斜拉桥
地震响应
multi-support excitations
response spectrum method
cable-stayed bridge
seismic response
