基于ABAQUS的梁板叠合构件受剪性能有限元分析

Finite Element Analysis for Shear Behavior of Beam-Slab Composite Component Based on ABAQUS

钢筋混凝土宽柱双梁框架结构体系是旧房托换改造的一种新理念,由楼面板开孔浇筑托换梁混凝土,形成了新梁旧板叠合结构。基于有限元软件ABAQUS,对梁板叠合构件受剪承载力进行了数值模拟,研究了素混凝土浇筑孔个数对叠合构件整体性能的影响。模拟中采用三维实体建模,并从单元的选取、接触面的相互作用、材料本构的定义、荷载的施加等方面进行了较为系统地阐述。研究表明,有限元软件ABAQUS是分析叠合梁板构件受力性能的一种行之有效的工具;随着孔洞个数的增加,叠合的梁板趋于一整体,协调变形,共同工作,承载力逐渐增大,梁板叠合构件发生剪压破坏。

Reinforced concrete frame structure system composed of wide column and double beams is a new concept in the old masonry underpinning retrofitting. The concrete of the underpinning beam is placed through some open-holes of the floor plate,then the new-beam and old-slab composite structure are cast and composited.In this paper,the finite element software ABAQUS was employed to simulate the shear behavior of this beam-slab composite component,and the number of the place holes made from plain concrete effecting on the whole structure behavior of the composite beam and slab component was studied. 3D finite element model was established in this simulation,and a series of numerical simulation technologies were described including the selection of element types,the interaction between interfaces,the material constitutive models,the loading,and many other aspects. The results showed that the finite element software ABAQUS was a kind of effective tool to study stress performance of this beam-slab composite component; composite beam and slab laminate to a whole,the deformation coordinates,the capacity increases and the beam-slab composite component ends with shear compression failure with the number of holes increases.