密肋复合墙体非线性数值分析及抗剪承载力研究

结合课题组前期的研究成果,通过对墙体中不同材料的本构模型、墙体中裂缝、多种材料的联结以及墙体边界条件的研究与探讨,运用通用有限元程序ANSYS对密肋复合墙体进行非线性有限元分析;并在试验结果与有限元模拟的基础上,依据极限平衡理论,建立起来复合墙体的斜截面抗剪极限承载力公式。理论分析与试验研究表明:复合墙体非线性有限元模型能够较好地模拟墙体内力和变形发展的全过程,描述裂缝的形成和扩展,对于实际工程和科学研究具有足够的精度;墙体斜截面抗剪承载力公式与实测值吻合较好,具有一定的精度,满足工程设计需要。

Nonlinear numerical analysis and shear capacity research of multi-ribbed slab walls

With the previous researched results,the stress-strain relationship of different materials,the cracks in the wall,and the connections between materials and the wall boundary conditions are studied and discussed.The multi-ribbed walls are analyzed by ANSYS in terms of nonlinear process.With the results of the multi-ribbed wall tests and finite element analysis,the shear capacity formulas of a oblique section based on ultimate balance theory are given.It can be concluded that the nonlinear finite element model can be used to imitate the developing process of the inner force and the deformation,as well as to describe the form and extension of the crack in the walls,which is accurate enough in engineering and scientific research.The results obrained from the shear capacity formulas of the oblique section are agreed with the testing results,and the formulas can meet the requirements of engineering design.