带水平加强层的框架——芯筒结构分析

The analysis of frame - core tube structure with strengthened stoties

为减小框架-芯筒结构的侧移,进行结构设计时可以在适当的层数设置水平加强层.本文引入连续介质力学中有关旋转自由度的概念来解决外框架梁、柱单元和剪力墙单元的连接问题,在普通平面八节点单元的基础上构造带旋转自由度的平面八节点单元.计算结果表明,设置加强层后能大大地减少结构侧移,而且计算结果精度满足要求,是一种高精度的计算方法.

In order to reduce the lateral displacement, strengthened stories are planed in proper stories in design. In order to solve the connection between the beam,column elements of outer frame and the plane elements of shear wall. It introduces the concept on the rotational degree of freedom of the continuous mechanics. It construct the eight node plane elements with the rotational degree of freedom on the base of the common eight-node plane elements. Finally, several example are given to demonstrate that the lateral displacement has reduced greatly after strengthened stories are planed, and the accuracy of calculation is very high. The method is proved to be a high accuracy and effective.