砌体填充墙RC框架基于FEAP的微观有限元分析

MICRO FINITE ELEMENT SIMULATION ANALYSIS OF RC FRAMES INFILLED WITH MASONRY WALLS BASE ON FEAP

基于美国加州大学伯克利分校研制的有限元软件FEAP(Finite Element Analysis Program),联合应用弥散裂缝单元和离散裂缝单元,建立了砌体填充墙RC框架的精细化微观有限元模型。基于美国加州大学圣地亚哥分校UCSD的试验结果对有限元模型进行了验证,对多层砌体填充墙RC框架进行了Pushover分析,研究了填充墙的裂缝开展、刚度变化、应力发展趋势,以及填充墙与RC框架的相互作用机制,研究了砌体填充墙RC框架的失效模式和抗震性能。

Based on the finite element software FEAP(Finite Element Analysis Program) developed at the University of California, Berkeley, refined micro finite element models are built for RC frames infilled with masonry walls combining the smeared crack element and the discrete crack element. The experimental results of a RC frame model tested at the University of California, San Diego are used to validate the rationality of the finite element models. Using the validated FEAP program, a multi-story frame is analyzed with the pushover analysis method. The trends of crack development, stiffness change and stress development are researched, and the interaction mechanism between infilled masonry walls and RC frames is studied. The failure mode and seismic performance of RC frames infilled with masonry walls are researched.