Seismic fragility analysis of multi-storey frame structure considering effect of valley terrain

被引：1
|
作者：
Huang B. [1 ,2 ]
Liao K.-L. [1 ,2 ]
Zhao Y. [1 ,2 ]
Jiang J.-Q. [3 ]
机构：
[1] MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou
[2] Institute of Geotechnical Engineering, Zhejiang University, Hangzhou
[3] Institute of Hydraulic Structure and Water Environment, Zhejiang University, Hangzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2019年 / 53卷 / 04期
关键词：
Focusing effect; Local valley terrain; Multi-storey frame structure; Seismic fragility; Soil-structure dynamic interaction;
D O I：
10.3785/j.issn.1008-973X.2019.04.010
中图分类号：
学科分类号：
摘要：
The seismic fragility curves of multi-storey frame structures suitable for Hangjiahu area were given based on dynamic time history analysis and probability statistics method combining with the local soil engineering characteristics and the fact of seismic fortification zones in view of the special situation that the scouring and silting valley topography is widely distributed in Hangjiahu area. The dynamic analysis results of multi-storey frame structures without considering foundation, homogeneous foundation and River Valley Foundation were compared. Results show that soil-structures dynamic interaction has a significant influence on the dynamic analysis results of structures. The deformation and the exceeding probability of fragility performance level of buildings were underestimated without considering soil-structures dynamic interaction. The deviation can reach 7.9%, which will lead to a dangerous result. The unique focusing effect of local valley topography on seismic waves will increase the structural deformation. The exceeding probability of seismic vulnerability can increase by 12.1% compared with homogeneous foundation, and the focusing effect is different at different locations of the valley. Under the selected seismic wave input, the closer the building structure is to the center of the valley, the greater the structural deformation and the greater the probability of exceeding the seismic fragility are. © 2019, Zhejiang University Press. All right reserved.
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页码：692 / 701and723
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