摘要
为研究长期荷载对钢管混凝土节点(钢梁节点)的力学性能,文中通过ABAQUS对长期荷载作用下钢管混凝土柱-钢梁节点进行了数值计算及参数分析,并与试验进行对比分析。依托ACI209徐变和收缩计算模型,建立长期荷载作用下考虑钢管混凝土徐变和收缩应力-应变关系本构,并与前期其他学者的试验研究成果进行对比。结果表明长期荷载比、柱截面含钢率、混凝土强度等级对钢管混凝土柱-钢梁节点纵向应变影响显著,钢管钢材强度与梁柱线刚度比对钢管混凝土柱-钢梁节点纵向应变影响不大。研究为考虑长期荷载的项目技术设计与施工提供必要的理论支撑。
We investigate the mechanical behavior of concrete-filled steel tube(CFST)column-steel beam joints under long-term loading through numerical simulations using ABAQUS and performs parametric analyses.The results are compared with experimental data for validation.Based on the ACI 209 model for creep and shrinkage,a constitutive stress-strain relationship that accounts for the effects of creep and shrinkage in CFST under long-term load is established and compared with findings from previous experimental studies.The results show that the long-term load ratio,steel ratio of the column cross-section,and concrete strength grade have significant effects on the longitudinal strain of CFST column-steel beam joints.In contrast,the steel strength of the tube and the beam-to-column stiffness ratio have relatively minor effects.This study provides essential theoretical support for the structural design and construction of projects involving long-term loading on CFST joints.
作者
邹爱华
赵晓文
朱飞飞
陈保平
王莉
ZOU Aihua;ZHAO Xiaowen;ZHU Feifei;CHEN Baoping;WANG LI(Kashi University Xinjiang Key Laboratory of Engineering Materials and Structural Safety,Xinjiang KaShi 844000,China)
出处
《低温建筑技术》
2025年第7期113-116,共4页
Low Temperature Architecture Technology
关键词
钢管混凝土节点
徐变与收缩
梁柱线刚度比
concrete-filled steel tube(CFST)joint
creep and shrinkage
beam-to-column stffness ratio
