预应力轻集料混凝土空心板梁的有限元模型

Finite Element Analysis Model on Prestressed LWAC Hollow Slabs

利用通用有限元软件ANSYS,选择上升段为二次抛物线的轻集料混凝土本构关系,采用约束方程法模拟预应力的施加方式、预应力和轻集料混凝土的相对滑移,建立了预应力轻集料混凝土空心板梁的有限元模型。计算结果表明:跨中截面上下缘应力计算值与试验值误差在5%左右,跨中挠度误差在1%左右。为进一步分析预应力轻集料混凝土空心板梁的力学性能奠定了基础。

Using general finite element software ANSYS, prestressed lightweight aggregate concrete （LWAC） hollow slab was simulated through the constitutive relationship choice of two parabolas＇s ascent portion, and the restraint equation to simulate prestressing and the relative slip between LWAC and prestressing. The result indicated that, the section upper and lower reason stress error is about 5 % while stepping, the deflection error, about 1%. This paper offers the basis for imitating LWAC strength performance.