自锚式悬索桥的平稳/非平稳随机地震响应

(1. 东北电力大学建筑工程学院，吉林 132012；2. 大连海事大学道路与桥梁研究所，辽宁大连 116026； 3. 大连理工大学桥梁工程研究所，辽宁大连 116023)

详细信息

SEISMIC RESPONSES OF SELF-ANCHORED SUSPENSION BRIDGE UNDER STATIONARY AND NON-STATIONARY RANDOM EXCITATIONS

(1. School of Civil Engineering, Northeast Dianli University, Jinlin 132012, China; 2. Institute of road and bridge engineering, Dalian Maritime University, Liaoning, Dalian 116026, China; 3. Institute of bridge engineering, Dalian University of Technology, Liaoning, Dalian 116023, China)

摘要: 通过引入均匀调制演变函数，考虑了地震激励幅值的非平稳性。同时考虑了地震动空间效应，包括行波效应、部分相干效应和局部场地效应的影响，对一自锚式混凝土悬索桥结构进行了地震反应分析。计算了平稳/非平稳地面激励下主塔弯矩以及剪力反应。计算结果表明，考虑非平稳因素可使地震反应峰值减小，行波效应和相干效应使结构地震反应增大。
- 均匀调制 /
- 非平稳 /
- 随机激励 /
- 自锚式悬索桥 /
- 地震响应 /
- 功率谱
Abstract: The uniformly modulated evolutionary function is introduced for the seismic response analysis of a self-anchored suspension bridge with the non-stationary seismic excitation amplitudes and the seismic spatial varying ground motion effect including wave passage effect, ground motion coherence loss and local-spatial variation ground effect taken into account. The bending moment and shearing force of the tower are investigated under stationary and non-stationary ground excitations. It can be verified that the seismic response peak values are decreased under non-stationary excitation. By taking into account wave passage effect and coherence loss, the seismic response peak values are increased.
- uniformly modulated /
- non-stationary /
- random excitation /
- self-anchored suspension bridge /
- seismic response /
- spectrum density