摘要
采用ABAQUS有限元分析软件,对12个蒸压加气混凝土(ALC)外墙板与钢框架新型连接节点模型进行非线性数值分析,得到板厚t、长圆孔两个方向孔径比b/a参数对新型连接节点的抗震性能与刚度的影响。结果表明:随着孔径比的增大,节点承载力略有减小,滞回曲线饱满程度变化不明显,"捏缩"现象变化不明显,刚度退化程度略有增加,各构件的应力分布值增大;随着板厚增加,节点承载力增大,滞回曲线更加饱满,"捏缩"现象变化更加明显,刚度退化程度减弱,各构件的应力分布值增大。参数b/a对提高新型连接节点的抗震性能影响不明显;板厚t对提高新型连接节点的抗震性能影响显著。
ABAQUS finite element analysis software was applied,and the nonlinear numerical analysis of 12 models of new connection node between ALC wall panels and steel frame was carried out. The influence of slab thickness t and b / a of two directions diameter ratio of slotted hole on seismic behavior and stiffness was obtained. The results showed that with the increase of aperture ratio of slotted hole,the bearing capacity of the connection decreased slightly,and the full extent of hysteresis curve did not change significantly,as well as the ＂pinching ＂ phenomenon, and the degree of stiffness degradation increased slightly,and stress distribution value of each member had been increased; with the increase of slab thickness,the bearing capacity of the connection increased,and the hysteresis curve was fuller,and ＂pinching ＂phenomenon changed significantly,and the degree of stiffness degradation had been reduced,and stress distribution value of each member had been increased. Conclusion showed that the influence of b / a of two directions diameter ratio of slotted hole on improving seismic performance of new connection node was not obvious,while the influence of slab thickness t was obvious.
出处
《钢结构》
北大核心
2016年第2期47-52,共6页
Steel Construction
基金
"十二五"国家科技支撑计划项目(2012BAJ13B05)
关键词
连接节点
抗震性能
滞回曲线
骨架曲线
刚度退化曲线
connection node
seismic behavior
hysteresis curve
skeleton curve
stiffness degradation curve
