蒸压加气混凝土砌块砌体填充墙框架结构抗震性能试验

Seismic performance test of frame structure infilled with steaming gassed concrete masonry

为进一步改善框架结构平面内和平面外抗震性能,本文提出带X形斜撑的新型砌体填充墙构造方案,并进行了4榀蒸压加气混凝土砌块砌体填充墙框架结构试验,以研究墙体构造措施和墙-框连接方式对框架结构抗震性能的影响。首先进行平面内水平低周往复荷载试验,随后进行历经平面内损伤的平面外单调静力加载试验,最后进行承载力、刚度退化和耗能能力等抗震性能指标的分析。结果表明:墙-框柔性连接方案下,填充墙框架结构的平面内及平面外水平承载力和初始刚度均小于刚性连接方案,而变形能力、耗能能力和位移延性等性能指标均比刚性连接表现更好;墙-框柔性连接且填充墙带X形斜撑框架结构的平面内及平面外抗震性能指标均有明显改善,更有利于抗震。

In order to improve in-plane and out-of-plane seismic performance of frame structure,a new type of structural configuration of masonry infill wall with X-shaped diagonal bracing is proposed in this paper,and the test of 4 RC frames infilled with AACB(Autoclaved Aerated Concrete Blocks)was carried out aimed to study the effect of structural configuration of masonry infill wall and the way of wall-frame connection on seismic performance of frame structure. Firstly,in-plane low-cyclic reversed loading tests was conducted,and then out-of-plane monotonic static loading test about frame structure with in-plane damage was conducted;secondly,the seismic performance indicators such as carrying capacity,stiffness degradation and energy consumption capacity were analyzed according to test results. The results of test and analysis show that the horizontal carrying capacity and initial stiffness of frames with wall-frame flexible connection are both smaller than rigid connection scheme,but the seismic indicators such as deformation capacity,energy dissipation capacity and displacement ductility are better than rigid connection;comprehensive seismic performance of flexible connection frame structure including in-plane and out-of-plane behavior is the best,especially the filled wall with X-shaped diagonal bracing.