隔墙下带加强钢筋厚板的非线性静力分析

Non-linear static analysis of thick reinforced concrete slabs with reinforcements under partitions

针对目前建筑结构中经常出现的钢筋混凝土大厚板中隔墙下的加强钢筋或暗梁没有明确设计规定,设计人员大多依靠经验进行简单计算的不足,对一采用大板的实际剪力墙住宅结构,在ANSYS中建立其局部有限元模型进行计算分析,模型中包含剪力墙、厚板和板中加强钢筋以及隔墙。钢筋采用Link8单元,其余均采用三维实体单元,其中厚板采用能考虑混凝土非线性的Solid65单元。针对在竖向荷载作用下结构模型的非线性静力分析结果,对隔墙、板和加强钢筋的受力进行了讨论,对隔墙的采用和加强钢筋的设计提出了建议。

There are no clear design standards for the concealed beams or reinforcements under partitions in big and thick slabs which often appear in contemporary reinforced-concrete residential buildings. Designers have to rely on engineering experiences to design such concealed beams or relnforcements. We built a local finite element method model of a real building in ANSYS. The model included shear walls, big slabs and partitions, and the underlying reinforcements. The element for reinforcement was Link8, and the others were solid elements. Specifically, the element for big slabs was solid65 which can asses the non-linear behaviour of concretes. Based on analysis results, we discuss the internal forces of big slabs, partitions and reinforcements. We offer suggestions for the design of reinforcements and selection of partitions.