摘要
为研究轴压比对带T型钢-圆钢管混凝土柱抗震性能的影响,使用ABAQUS有限元分析软件对现有文献中的5个试件进行建模分析,通过滞回曲线和极限承载力等指标验证模型可靠性,在被验证的模型基础上进行不同轴压比的拓展分析。结果表明:有限元滞回曲线基本吻合,极限承载力和延性误差在9%以内,略大于试验结果,模拟的混凝土损伤云图具有与试验结果一致的柱脚压溃损伤、沿试件长度方向的水平裂缝和约在1/3柱高处的塑性铰;应力分析和机理分析表明,纵筋和受压/拉侧T型钢对核心混凝土约束较大,内部钢骨主要提供抗侧刚度;随着轴压比的增大,试件由受弯破坏转变为压剪破坏,抗剪承载力最大退化了8.6%,而延性最大退化了63.5%。
To study the impact of axial compression ratio on the seismic performance of concrete columns with T-shaped steel circular steel tubes, ABAQUS finite element analysis software was used to model and analyze 5 specimens from existing literature.The reliability of the model was verified through indicators such as hysteresis curve and ultimate bearing capacity.Based on the verified model, expansion analysis of different axial compression ratios was conducted. The results show that the hysteresis curve of the finite element method is basically consistent, and the error of ultimate bearing capacity and ductility is within 9%,slightly greater than the experimental results.The simulated concrete damage cloud map has column foot crushing damage, horizontal cracks along the length direction of the specimen, and plastic hinges at about 1/3 of the column height that are consistent with the experimental results;Stress analysis and mechanism analysis indicate that longitudinal reinforcement and compression/tension side T-shaped steel have significant constraints on the core concrete, while internal steel ribs mainly provide lateral stiffness;As the axial compression ratio increases, the specimen undergoes a transition from flexural failure to compressive shear failure, with a maximum degradation of 8.6% in shear capacity and 63.5% in ductility.
作者
曾祥山
邱其荣
余勇
ZENG Xiangshan;QIU Qirong;YU Yong(Guangxi Zhongyu Bocheng Engineering Design Co.,Ltd.,Nanning,Guangxi 530029,China;Shanghai Construction Engineering Fifth Construction Group Co.,Ltd.,Shanghai 200063,China;College of Environment and Civil Engineering,Dongguan University of Technology,Dongguan,Guangdong 523808,China)
出处
《江苏建筑职业技术学院学报》
2024年第1期21-25,共5页
Journal Of Jiangsu Vocational Institute of Architectural Technology
基金
广东省基础与应用基础研究(2019A1515110481)。
关键词
T型钢-钢管
混凝土柱
轴压比
抗震性能
有限元分析
T-shaped steel-steel tube
concrete columns
axial compression ratio
seismic per-formance
finite element analysis
作者简介
曾祥山,男,助理工程师,研究方向为工业与民用建筑.E-mail:897692010@qq.com。
