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Behavior of Masonry-Infilled Nonductile Reinforced Concrete Frames
Abstract: This paper presents research on the behavior of a type of building popular in high seismic zones with a lateral-load-resisting system consisting of masonry-infilled reinforced concrete ~RC! frames. Older buildings of this type typically were designed for gravity loads in combination with insufficient or no lateral loads, therefore they do not meet current seismic code requirements. Also, the participation of infill panels in the lateral load resistance of RC frames was not recognized in the original design, often resulting in an overly conservative design. In an attempt to determine the seismic vulnerability of this type of structure, an experimental program was carried out to evaluate the behavior of five half-scale, single-story laboratory models with different numbers of bays. The results indicated that infilled RC frames exhibit significantly higher ultimate strength, residual strength, and initial stiffness than bare frames without compromising any ductility in the load-deflection response. Furthermore, the number of bays appears to be influential with respect to the peak and residual capacity, the failure mode, and the shear stress distribution.
砌体填充墙钢筋混凝土框架结构的非延性性状
文摘: 本文提出的一种关于高地震区由砌体填充墙钢筋混凝土（RC）构成的框架的侧向负载抵抗建设传统建筑的性状的研究，这种类型的典型地被设计为重力载荷结合不足或根本没有横向载荷的较旧的建筑物，因此，它们不符合当前的抗震设计要求。此外，填充墙的钢筋混凝土框架结构的抗侧力性能的参与最初的设计不被认可，往往造成过于保守的设计。在试图确定这种类型的结构的抗震易损性，实验方案进行了5个一半的测定，单层实验室模型具有不同数目开间的性状。结果表明，填充墙的钢筋混凝土框架显著高于极限强度，残余强度，并且对于未装修的框架初始刚度而不损害任何延展性，在载荷 - 挠度响应也是这样。此外，开间的数目似乎是有影响相对于所述峰值和剩余容量，失效模式和剪切应力分布。 | 
