摘要
基于前期的试验数据,利用有限元软件ABAQUS对型钢混凝土柱在压力、弯矩、剪力和扭矩共同作用下的抗扭性能进行数值模拟。通过反复试算,对比试验数据,分析误差,给出了合理的有限元模型参数,验证了有限元模型的可靠性。基于已建立的有限元模型,对影响复合受力下型钢混凝土柱受扭性能的关键参数进行分析,探讨配箍率、轴压比、含钢率对型钢混凝土柱受扭性能的影响规律,分析模型试件各特征阶段的荷载-位移曲线。结果表明:在其他参数一定的情况下,增加配箍率,有助于约束混凝土的横向变形,能够提高型钢混凝土柱的承载力与延性;随着轴压比的增加,型钢混凝土柱承载力与延性降低较为明显,试件趋于脆性破坏;含钢率的增大会提高复合受力下型钢混凝土柱承载力、抗侧刚度及延性。通过分析,给出了在压弯剪扭共同作用下,型钢混凝土柱的配箍率、含钢率及轴压比的建议值,为工程设计提供参考。
Based on the previous test data,the torsional behavior of steel reinforced concrete columns under the combined loading of pressure,bending moment,shear and torque is simulated by using the finite element software ABAQUS.Through repeated calculation,comparison of test data and error analysis,the reasonable parameters of finite element model are given,and the reliability of finite element model is verified.Based on the established finite element model,the key parameters affecting the torsional behavior of steel reinforced concrete columns under combined loading are analyzed.The influence rules of stirrup ratio,axial compression ratio and steel ratio on the torsional behavior of steel reinforced concrete columns are discussed,and the load displacement curves of each characteristic stage of the model specimens are analyzed.The results show that:when other parameters are fixed,increasing the stirrup ratio is helpful to restrain the transverse deformation of concrete,and can improve the bearing capacity and ductility of steel reinforced concrete columns;with the increase of axial compression ratio,the bearing capacity and ductility of steel reinforced concrete columns decrease obviously,and the specimens tend to brittle failure;the increase of steel ratio will improve the bearing capacity,ductility and stiffness of SRC columns.Through the analysis,the recommended values of stirrup ratio,steel ratio and axial compression ratio of SRC columns under the combined action of compression,bending,shear and torsion are given,which can provide reference for engineering design.
作者
何叶
刘清颖
马江萍
张奎
HE Ye;LIU Qingying;MA Jiangping;ZHANG Kui(College of Architecture and Art Design,Xi’an Peihua University,Xi’an 710100,China;China Jikan Research Institute of Engineering Investigations and Design Co.,Ltd.,Xi’an 710043,China)
出处
《粉煤灰综合利用》
CAS
2021年第6期7-11,130,共6页
Fly Ash Comprehensive Utilization
基金
陕西省教育厅2020年度一般专项科学研究计划(20JK0819)
机械工业勘察设计研究院有限公司科技研发基金项目(11740502120210007)。
关键词
型钢混凝土柱
抗扭性能
配箍率
轴压比
含钢率
SRC column
torsional resistance
stirrup ratio
axial compression ratio
steel ratio
作者简介
何叶(1987-),女,硕士,高级工程师,主要从事土木工程方面的教学与研究工作。
