摘要:斜交网格体系没有传统意义上的梁和柱, 只有双向交叉的斜柱, 并由它们组成筒体。这种体系侧向刚度大, 并以斜向轴力形式传力, 有效地克服了二阶弯矩的产生, 弥补了梁柱体系抵御水平荷载的不足, 使得建筑内部布置更为自由。此类结构可视为支撑框筒体系, 不同于一般框筒结构, 其外筒由双向交叉连续环绕建筑外表面的斜杆组成, 克服了传统垂直柱受水平力过大需加斜向支撑的弱点。本文采用ABAQUS软件对这类结构直接进行罕遇地震下的动力弹塑性分析, 研究不同大小核心筒的斜交网格体系在罕遇地震作用下的力学性能。

Abstract: The diagonal grid system does not have the traditional beams and columns, and only has the double-way crossed diagonal columns, and such columns form the tube body.This system has great lateral rigidity, and transmits force in the way of slant axial force.It can effectively overcome generation of the second order bending moment, make up the defect that the beam and column system cannot sufficiently resist the horizontal load, and the internal layout of the building is freer.The structure can be deemed as the supporting frame and tube system, and is different from the ordinary frame and tube structure.The exterior tube consists of diagonal rods that cross in double-way and encircle the external surface of the building continuously.It can overcome the weakness that additional slant bracing is needed if the traditional vertical column bears excessive force.In this paper, the dynamic elastoplasticity analysis for such structure under rarely-occurring earthquake is conducted using the ABAQUS software.For the diagonal grid system of the core tubes in different sizes, mechanical properties of the system under rarely-occurring earthquake action are analyzed.