地震工程学报2025，Vol.47Issue(3)：590-597,8.DOI:10.20000/j.1000-0844.20231209001
基于杆段纤维模型的型钢混凝土柱滞回性能分析
Hysteretic behavior analysis of steel reinforced concrete columns using segment fiber model
摘要
Abstract
Accurately predicting the elastoplastic behavior of steel reinforced concrete(SRC)members is essential for evaluating the collapse performance of SRC structures.This study devel-ops a segment fiber model for SRC members(SRC-SFM)based on the discrete element method(DEM).Key innovations include(1)a uniaxial steel constitutive model that incorporates material softening and(2)a method for calculating concrete compressive constitutive parameters for an equivalent single-section,which accounts for dual confinement effects from structural steel and stirrups.This approach allows for the direct implementation of standard concrete models within the SRC-SFM framework.The proposed model was integrated into the DEM-based structural collapse discrete element computation pro-gram developed by the research team.Simulation analyses were performed to evaluate the hysteretic per-formance of H-section SRC columns with varying parameters under low-cycle reversed loading.The results confirm that the SRC-SFM,enhanced with a softening steel model and improved concrete constitutive parameter calculation method,accurately replicates the hysteretic behavior of flexural-compression members.These results establish a reliable foundation for subsequent stud-ies on fracture mechanisms and collapse process simulations of SRC members.关键词
型钢混凝土/杆段纤维模型/混凝土约束效应/单轴本构模型/滞回性能分析Key words
steel reinforced concrete/segmented fiber model/confinement effect of concrete/uniaxial constitutive model/hysteretic performance analysis分类
土木建筑引用本文复制引用
段青玉,王强,杨春晓..基于杆段纤维模型的型钢混凝土柱滞回性能分析[J].地震工程学报,2025,47(3):590-597,8.基金项目
国家自然科学基金国家重大科研仪器研制项目(52027811) （52027811）
辽宁省教育厅基金项目(1nsw202005) （1nsw202005）
