抗震结构填充墙性能的有限元模拟与分析

为充分了解抗震结构填充墙的开裂机理和抗裂能力,并为砌块填充墙的抗震性能提供依据,文中采用有限元方法对砌块墙体的面内开裂进行了分析.研究发现,抗震结构中填充墙的开裂机理十分复杂,但其开裂行为及抗裂能力主要决定于墙体所处的层间位移角以及自身的材料强度.文中还得到了不同弹性模量的砌块墙体在不同裂缝限值下的层间位移角值,可应用于填充墙框架结构基于性能的抗震设计中.

Finite Element Simulation and Analysis of Performance of Infill Walls of Aseismic Structures

Infill walls as one of the most important nonstructural components are more easily damaged than frame components for their fragile properties, which can absorb the earthquake energy first and help to protect the main structural components in infilled structures. The width of crack can be considered as main seismic performance index for infill walls. Therefore, in this paper, an FEM method is adopted to simulate the complicated crack behavior of infill walls, in order to provide the basic information for performance-based seismic design of infilled structures. The results shows that cracking behavior of infills is very complicated, and the crack-resistant capacity of masonry basically depends on the storey drift angle of frame and self-strength of materials. Story drift angle of different material modules of infill walls is obtained due to different crack width in the end. The performance between infills and frame components is unambiguous. The research results can be applied to the actual performance-based seismic design for infilled structures in future.