Seismic performance analysis of underground structures based on random field model of soil mechanical parameters

作     者：Chao Ma Shenghui Zhou Jingwei Chi Chao Ma;Shenghui Zhou;Jingwei Chi

作者机构：School of Civil and Transportation EngineeringBeijing University of Civil Engineering and ArchitectureBeijing102616China 

出 版 物：《Earthquake Research Advances》 (地震研究进展（英文）)

年 卷 期：2022年第2卷第4期

页      面：3-10页

核心收录：

学科分类：081405[工学-防灾减灾工程及防护工程] 08[工学] 081401[工学-岩土工程] 080104[工学-工程力学] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the Beijing Natural Science Foundation(8212007) the Pyramid Talent Training Project of Beijing University of Civil Engineering and Architecture(JDYC20200311)。 

主　　题：Underground structures Random field Seismic performance FEM analysis Variable coefficient 

摘      要：Soils with spatial variability are the product of natural history.The mechanical properties tested by soil samples from boreholes in the same soil layer may be different.Underground structure service in surrounding soils,their seismic response is controlled by the deformation of the surrounding soils.The variability of soil mechanical parameters was not considered in the current research on the seismic response of underground structures.Therefore,a random field model was established to describe the spatial variability of surrounding soils based on the random field theory.Then the seismic response of underground structures in the random field was simulated based on the time-domain explicit global FEM analysis,and the soil mechanical parameters and earthquake intensity influencing the seismic response of surrounding soils and underground structures were studied.Numerical results presented that,the randomness of soil parameters does not change the plastic deformation mode of surrounding soils significantly.The variation coefficients of inter-story deformation of structures and lateral deformation of columns are much smaller than that of mechanical parameters,and the randomness of soil parameters has no obvious effect on the structural deformation response.