Seismic response analysis of subway underground stations using split columns

2018 International Conference on Civil, Architecture and Disaster Prevention

土木建筑工程

Wen, Shao^1

China Railway First Survey and Design Institute Group Co. Ltd., Xi'an, ShaanXi

710043, China^1

关键词: Constitutive relationships;    Dynamic time history analysis;    Finite element software;    Numerical integration methods;    Seismic response analysis;    Structure calculation;    Time history analysis;    Underground stations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/218/1/012127/pdf
DOI  :  10.1088/1755-1315/218/1/012127

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Taking the underground station research project of the first phase of Nanning Rail Transit Line 4 as the engineering background, based on the ABAQUS large-scale finite element software, the numerical integration method, the constitutive relationship of structural materials and the determination of boundary conditions appear in the model establishment. The key problems of seismic wave selection and input are analyzed. The appropriate 3D standard section metro station structure calculation model is established. The seismic wave baseline drift phenomenon occurs in the dynamic time history analysis of ABAQUS. The Seismic Signal software is used to correct the seismic wave baseline. On the basis of theoretical analysis, through the numerical simulation, the dynamic time-history analysis of the frame column and the split column in the metro station under the two-way coupled seismic action is carried out, and the elastoplasticity of the metro station adopting the frame column and the split column is carried out. Time-history analysis found that the bearing capacity of the split column under the large earthquake is about 16% lower than that of the frame column, but the ductility is increased by about 35%. In other words, the split column loses part of the bearing capacity and changes the force of the frame column. Features greatly improve the ductility of the column.