(中国建筑科学研究院  北京 100013)

［提要］  利用弹塑性有限元分析方法，对一个带转换层的30层型钢混凝土框筒混合结构缩尺模型的拟静力加载试验过程进行了数值模拟。采用了纤维束模型的梁柱单元以及基于Darwin Pecnold正交各向异性非线性弹性混凝土本构模型的平面应力膜单元模拟结构中的框架和剪力墙，介绍了有限元网格剖分、钢梁与混凝土墙交接的半刚接处理以及楼板的考虑方式。与试验数据的对比表明，数值模拟得到的结构骨架曲线和楼层变形情况可以做到较为符合实际。

［关键词］  弹塑性有限元分析  钢混凝土混合结构  拟静力试验

Elastoplastic Numerical Simulation to Pseudo-static Test of High-rise Hybrid Structure/Authors:Huang Jifeng, Xu Peifu, Xue Yantao (China Academy of Building Research, Beijing 100013, China)

Abstract:With the elastoplastic static analysis of FEM, a numerical solution is done to simulate the pseudo static test being carried out on the 1∶10 size reduced model of a 30 storied steel reinforced concrete frame corewall building structure with transfer story. The fiber model beam column element and the plane stress membrane element based on the Darwin Pecnold nonlinear elastic constitutive relations of concrete are adopted to model the frame and the corewall in the structure, respectively. The FEM mesh, the semi-rigid connections between the steel beam and the concrete wall and the consideration of the contribution of the slab are specially recommended. The results show that the backbone curves and the inter-storey deformation of the structure obtained from the numerical simulation can be well matched with the test data.

Keywords:structural elastoplastic analysis of FEM; steel-concrete hybrid structure; pseudo static test