|Table of Contents|

Analysis of high frequency and amplitude variation law of axial compression ratio of central column in subway station and hysteretic performance degradation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年05期
Page:
74-84
Research Field:
建筑结构
Publishing date:

Info

Title:
Analysis of high frequency and amplitude variation law of axial compression ratio of central column in subway station and hysteretic performance degradation
Author(s):
LIU Zhichen1;  DENG Peng1; 2;  CHEN Renpeng1; 2;  KE Wenhai3
(1. College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. Hunan Engineering Research Central for Advanced Technology and Intelligent Equipment for Underground Space Development, Hunan University, Changsha 410082, Hunan, China; 3. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, Jiangxi, China)
Keywords:
central column;  finite element model;  variable axial compression ratio;  amplitude;  frequency;  hysteretic performance
PACS:
TU924
DOI:
10.19815/j.jace.2024.02019
Abstract:
Based on the finite element model of subway station, the evolution law of axial compression ratio of central column top under different seismic design schemes was obtained through nonlinear time history analysis, and the numerical quantification was carried out. Based on the quantified evolution mode of variable axial compression ratio, the influence of variable frequency, amplitude, and phase of variable axial compression ratio on hysteretic properties of central column was explored through the experimental verified central column model, and the concrete damage of central column was discussed. The results show that the horizontal displacement of the central column top and the vertical axial compression ratio change asynchronously, the latter change frequency is faster, the latter change frequency is about 1.4-3.8 times of the former, and the vertical axial compression ratio change amplitude is 0.08-0.68. Compared with the vertical constant axial compression ratio, the high variable axial compression ratio applied on the central column top has a significant adverse effect on the bearing capacity, energy dissipation, and stiffness degradation of column, and aggravates the concrete compression damage of column. When the frequency of vertical axial compression ratio is 3 and the amplitude is large, the damage is particularly obvious, and the bearing capacity and energy dissipation are reduced by about 50% and 74% respectively.

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Last Update: 2025-09-25