|Table of Contents|

Shear hysteretic model for core area of corroded RC frame joints(PDF)

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

Issue:
2026年01期
Page:
162-172
Research Field:
建筑结构
Publishing date:

Info

Title:
Shear hysteretic model for core area of corroded RC frame joints
Author(s):
ZHENG Shansuo1; 2;  LIU Liguo1;  DONG Liguo3;  YANG Song1;  LI Jian1;  CONG Jun4
（1. College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China;? 2. Key Lab of Structural Engineering and Earthquake Resistance of Ministry of Education, Xi’an University of? Architecture and Technology, Xi’an 710055, Shaanxi, China; 3. China Northwest Architectural Design and? Research Institute Co., Ltd, Xi’an 710018, Shaanxi, China; 4. China Construction Sixth Engineering? Bureau Co., Ltd, Tianjin 300171, China）
Keywords:
corroded RC frame joint;  shear hysteretic model;  seismic behavior;  OpenSEES
PACS:
TU375
DOI:
10.19815/j.jace.2024.11027
Abstract:
In order to meet the seismic analysis requirements of in-service RC frame structures under general atmospheric conditions, artificial accelerated corrosion and quasi-static loading tests were conducted on 12 RC frame joints to investigate the effects of corrosion level and axial compression ratio changes on joint failure mode, hysteresis performance, and core shear performance. Based on the multi-parameter regression analysis of the experimental results, the shear hysteretic model for the core area of corroded RC joints was established, and a composite numerical model of corroded RC joints was established using Joint2D and fiber beam column elements in OpenSEES software. The results show that the failure mode of corroded RC joints is shear failure in the core area of joint. The increase in the degree of corrosion and axial compression ratio will weaken the bearing capacity and deformation capacity of RC joint and its core area, leading to a deterioration in seismic behavior. The proposed shear hysteretic model can comprehensively reflect the shear hysteresis characteristics of RC joint core areas with different degrees of corrosion and axial compression ratios. The relative error of load simulation for the established numerical model of corroded RC joint combination is basically no more than 10%, the relative error of deformation simulation is basically no more than 20%, and the cumulative energy dissipation relative error during final failure is also basically controlled within 30%. The numerical model of the joint combination based on the shear hysteretic model of the core area of corroded RC joints can accurately simulate the hysteresis performance of corroded RC joints under reciprocating loading, and can be used for seismic analysis and evaluation of RC joints and frames in general atmospheric environments.

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Last Update: 2026-01-20