摘要
一种改良的基于细观力学模型的渐近均匀化方法应用于分析砌体力学性能和破坏机理,采用细观单胞(等效体积单元RVE)来表征宏观砌体的力学特性,对砌体单胞进行力学分析和材料失效过程模拟,利用通用有限元软件ANSYS的APDL语言实现了该方法。在此基础上,对砌体单胞进行力学分析,计算了砌体三维等效模量,从而得出砌体的宏观力学性能。通过与A.Zucchini的细观力学模型结果对比利用ANSYS的APDL语言求解均匀化方程,验证了本方法求解砌体三维等效模量的适用性。最后,在用AHM求得砌体宏观三维等效模量之后,对承受平面内剪压复合作用的砌体剪力墙进行模拟,用该方法分析砌体剪力墙的内部应力应变状态和破坏机理,并与试验和复合界面模型对比,结果表明该方法在工程应用中有效。
An improved asymptotic homogenization method was applied to analyze the mechanical performance and failure mechanism of masonry. The microscopic basic cell （representative volume element （RVE）） was adopted to represent the macroscopic mechanical performance of masonry, so that the problems were to analyse the mechanical performance and simulate failure process. On the effort of our group, APDL language of ANSYS was applied to develop the method. Then, analyze the mechanical performance of base cell and the three-dimensional equivalent modulus of masonry. Therefor, the macro-mechanical characteristics of masonry could be educed. It was compared with A. Zucchini, s micro-mechanical model which proves that the method is suitable for three-dimensional equivalent modulus calculation of masonry. Finally, on the basis of above results, the proposed model was applied to simulate the internal stress-strain state and failure mechanism of masonry shear wall under in-plane shear-compression. It implied that the method is availability by comparing with test and composite interface model, it is concluded that the method is applicable in engineering.
出处
《土木工程与管理学报》
2013年第3期55-58,64,共5页
Journal of Civil Engineering and Management
基金
湖南省教育厅资助科研项目(10C1286)
关键词
渐近均匀化
砌体
三维等效模量
破坏机理
asymptotic homogenization
masonry
three-dimensional equivalent modulus
failuremechanism
