摘要
利用LS-DYNA,考虑结构的材料及几何非线性,对深大地铁上盖超高层建筑3个典型节点进行有限元分析,考察节点在标准组合及大震组合下的应力分布状态,得到节点区域应变分布。数值分析结果表明,标准组合下节点区域型钢处于弹性阶段,节点区混凝土很小部分区域达到强度极限,节点具有良好的工作性能。大震组合下,节点核心区混凝土内型钢翼缘部分区域屈服进入塑性阶段,虽然混凝土部分应力增加不少,但3个节点仍能继续工作。
Three typical joints between concrete filled steel tubular beam and column of a high rise building located on Shenzhen University Railway Station analyzed by LS-DYNA were presented. The material nonlinearity and geometrical nonlinearity has been considered. The Working performance of joints under standard forming of load and medium earthquake were simulated and the distributions of stress of joints were present. The numerical results show that the steel in core concrete of joints was mostly in elastic stage and few parts of concrete could be found to reach their ultimate strength. It has been show that the steel and concrete of joints have good performances at this stage. Part of the flanges of steel I beam has been yield under medium earthquake. Although the stress of concrete has increased greatly,the selected three joints can still work at this stage.
出处
《建筑结构》
CSCD
北大核心
2012年第S2期433-438,共6页
Building Structure
关键词
非线性
有限元
高层建筑
钢管混凝土
节点
nonlinearity
finite element method
high rise building
concrete filled steel tubular beam and column
joint
