摘要
利用有限元软件ANSYS建立了强轴和弱轴共存的空间半刚性梁柱节点模型,其中强轴采用腹板角钢和顶底角钢连接,弱轴采用顶底角钢连接.通过不同的单调以及循环加载方案,研究不同加载模式下空间半刚性梁柱体弱轴对强轴的影响规律.考虑了模型几何大变形、材料非线性以及接触非线性,分析了顶底角钢强轴连接的应力分布、变形特征、塑性发展、接触摩擦状态以及破坏模式.结果表明:弱轴连接对强轴的弯矩承载能力和转动变形特征产生一定的影响,为进一步的三维空间分析提供参考依据.
The space semi-rigid steel beam-column joints model with coexistence of strong-axis and minor-axis was established by the finite element software ANSYS,in which the strong-axis with the web angle and the top-and-seat angle,the minor-axis with the top-and-seat angle.The influence mechanism of the minor-axis on the strong-axis for the space semi-rigid steel beam-column was investigated by conducting different monotonic and cyclic loading programs.The geometric large deformat ion of the model,material nonlinear and contact-fraction behavior were conside red in the finit element analysis.The stress distribution,deformation,plastic development,contact-fraction state and the failure mode of the top-and-seat angle strong-axis concections were analyzed.The results demonstrated that it had some impacts of the minor-axis on the mom ent carrying capacity and the rotational deformation of the strong-axis,which provi ded reference bases for further 3D spacial analysis.
出处
《华北水利水电学院学报》
2010年第6期11-14,共4页
North China Institute of Water Conservancy and Hydroelectric Power
基金
国家自然科学基金资助项目(50679006)
中国博士后科学基金资助项目(20090461166)
国家教育部新世纪优秀人才计划资助项目(NCET-06-0270)
关键词
空间半刚性连接
弯矩-转角性能
滞回曲线
数值模拟
破坏模式
space semi-rigid connection
moment-rotation behavior
hysteretic cur ve
numerical simulation
failure mode
