混凝土灌芯纤维石膏板的宏观计算模型

为掌握混凝土灌芯纤维石膏板(速成墙板)的受力特性和分析速成墙板的试点工程,结合该墙板材料的具体特性,在已有的微观及宏观计算模型的基础上,基于纤维模型概念和铁木辛柯梁理论,建立了用于研究速成墙板等组合墙体的非线性分析的宏观纤维计算模型,即每个墙体单元由宏观纤维子单元和宏观剪切子单元组成,分别抵抗轴力和弯矩及剪力,推导了模型的单元刚度矩阵及建立了各杆件的本构模型。运用计算模型对4块满灌混凝土石膏板进行了推覆分析,并与试验结果进行了比较,结果表明该模型具有较好的精度,且计算简单,可用于复合结构的动力分析。

Macro Model of Fiber Plasterboard Filled with Reinforced Concrete

To master the mechanical property and to analyze pilot project of the fiber plasterboard filled with reinforced concrete(Rapid Wall),according to the material characteristic and the idea of micro-and macro-model,a macro-model basing on the idea of fiber model is put forward,which is applied to analyze nonlinear characteristic of composite wall.The macro-model is composed of macro fiber element that only resists axis force and moment of the composite wall,and macro shear element that only resists shear force of the composite wall.Stiffness matrix of the model and constitutive models of element stiffness are presented.The elasto-plastic push-over is carried out to the four fiber-plasterboard filled with reinforced concrete with the macro-model.The computational results are all close to those of experiments,which show that the macro model can be used to analyze the dynamic properties of composite material and has relatively high accuracy.