[1]夏修身,陈兴冲,李建中.隔震桥梁合理结构阻尼模型[J].东南大学学报(自然科学版),2016,46(1):140-145.[doi:10.3969/j.issn.1001-0505.2016.01.023] 　Xia Xiushen,Chen Xingchong,Li Jianzhong.Reasonable structure damping model of isolated bridge[J].Journal of Southeast University (Natural Science Edition),2016,46(1):140-145.[doi:10.3969/j.issn.1001-0505.2016.01.023] 点击复制 隔震桥梁合理结构阻尼模型() 分享到： var jiathis_config = { data_track_clickback: true };

46

2016年第1期

140-145

2016-01-20

文章信息/Info

Title:
Reasonable structure damping model of isolated bridge

1兰州交通大学土木工程学院, 兰州 730070; 2同济大学土木工程学院, 上海 200092
Author(s):
1School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2College of Civil Engineering, Tongji University, Shanghai 200092, China

Keywords:

U442.55
DOI:
10.3969/j.issn.1001-0505.2016.01.023

Abstract:
In order to deal with the complex damping problems in isolated bridges, the damping simulation methods are studied. According to different damping sources and mechanisms, the damping in isolated bridges is divided into two categories, the hysteretic damping and the structural damping. The selection method for the controlling mode with structure damping simulated using Rayleigh damping is proposed based on the mode superposition method with the uniform mode. Taking the seismic response without structural damping as reference, the seismic responses of an isolated bridge with Rayleigh damping and stiffness proportional damping are investigated by using the bearing displacement and the internal force of pier bottom as composite index.The results show that structural damping has great influence on the seismic response of the isolated bridge. The classical Rayleigh damping is not suitable for the isolated bridge. Using stiffness proportional damping based on the initial stiffness to simulate structure damping in the isolated bridge is reasonable.

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