摘要
以某超高层公寓项目中梁平柱边的典型大偏心梁柱节点为例,通过有限元软件ABAQUS模拟梁柱偏心节点在低周反复荷载的受力性能,探讨梁柱偏心所产生的附加扭矩对节点核芯区抗剪承载力的影响;基于有限元分析结果,提出梁平柱边的大偏心梁柱节点有效宽度计算公式,并将其应用于具体工程项目中。结果表明,采用节点有效宽度公式取值得出的节点核芯区抗剪承载力与有限元计算结果基本一致。针对项目中的T形梁柱节点,定量分析了梁柱偏心所产生的附加弯矩对柱端弯矩的影响;结果显示,附加弯矩在竖向荷载作用下可减小柱端弯矩约50%,在地震作用下增大柱端弯矩约86%。
Taking the typical large eccentric beam-column joints by side alignment in a super high-rise apartment building as the example,mechanical behavior of eccentric beam-column joints under reversed low-cyclic loading was simulated by ABAQUS finite element software,the influence of additional torque caused by beam-column eccentricity on the shear bearing capacity of core joint area was discussed.Based on the finite element analysis results,the effective width formula of large eccentric beam-column joints by side alignment was proposed and applied to a specific project.The results show that the shear bearing capacity of core joint area obtained by the effective width formula proposed is basically consistent with the finite element calculation result.Aiming at T-shaped beam-column joints in the project,the influence of additional bending moment caused by beam-column eccentricity on bending moment of column end was quantitatively analyzed.The results show that the additional bending moment can reduce the bending moment of the column end by about 50%under vertical load,and increase the bending moment of the column end by about 86%under earthquake.
作者
刘钝
邢沛霖
张艳军
杨丹
LIU Dun;XING Peilin;ZHANG Yanjun;YANG Dan(CITIC General Institute of Architectural Design and Research Co.,Ltd.,Wuhan 430014,China)
出处
《建筑结构》
北大核心
2024年第14期84-91,17,共9页
Building Structure
关键词
大偏心梁柱节点
节点有效宽度
抗剪承载力
数值分析
large eccentric beam-column joint
effective width of joint
shear bearing capacity
numerical analysis
