不同砌筑方式下砌体严格匀质化方法研究

Study on Unique Homogenization of Masonry with Different Bricklaying Methods

该文在基于契合理论的前提下,遵循平面分割法则,运用矩形分割点阵对三种常见砌筑方式的砌体结构进行契合分割,得到了三种代表体积单元(即RVE单元)。在建立砌体平面分割理论的基础上,对砌体结构的最小基本组元进行力学研究分析,得到RVE单元的周期性应力场和应变周期性位移场。运用ABAQUS软件建立了三种砌筑方式下的RVE模型,求出相应各向等效参数,实现对砌体结构基于细观力学的模拟分析。有限元软件所得的变形和力学性能与试验结果进行比较后吻合良好,说明匀质化方法模拟三种砌筑方式下的砌体结构受力特征具有可靠性,为工程应用提供了理论依据。

Based on the fit theory,this paper followed the plane segmentation law and employed the rectangular unit lattice to divide masonry constructed with three types of bricklaying methods,thereby obtaining three representative volume units(RVE units).After the establishment of the masonry plane segmentation theory,the mechanicalproperty of theminimum basic components of the masonry structure was analyzed,deriving the periodic stress field and strain periodic displacement field of RVE elements.With the ABAQUS software,the RVE model under three types of bricklaying methods was established,and thus corresponding equivalent parameters in each direction were calculated,so the simulation analysis of the masonry structure based on meso mechanics was realized.The deformation and mechanical properties obtained by the finite element software are in line with the experimental results,indicating that the homogenization method shows reliability in simulating the mechanical characteristics of the masonry structure with three types of bricklaying methods,which provides a theoretical basis for engineering applications.