不同单、双向配筋条件下板受力过程的非线性仿真分析

Nonlinear simulating analysis on load-bearing process of the slab under various one-way or two-way reinforced conditions

根据弹性理论,板的单双向受力行为由板的几何尺寸决定,钢筋混凝土是弹塑性材料,在弹塑性的非线性阶段不同配筋条件对钢筋混凝土板受力的影响较少有专门研究.本文利用有限元软件Ansys对方形板在不同配筋条件下的受力过程进行了仿真分析,分析表明,在混凝土开裂后,不同配筋条件对板的裂缝和钢筋屈服的发展程度以及刚度的影响较明显,对极限强度有一定影响.本文研究能加深对钢筋混凝土板的单、双向受力性能的理解.

According to the elasticity theory, the load-bearing behavior of one-way or two-way is determined by geometrical size of the slab. Reinforced concrete is elastoplastic material, however, there are rarely data of the effect on slab＇s mechanical behavior under various reinforced conditions at nonlinear stage. In this paper, simulating analysis of load-bearing process was carried out by means of the finite element analysis software Ansys. The results showed that after concrete cracking, various reinforced conditions had obvious effect on the development of crack and yield of rebars, and had effect on the ultimate strength of slab a certain extent. The investigation will deepen the understanding of one-way or two-way properties of the R C slab.