加气混凝土砌块组合墙加固震损框架抗震性能试验

发布时间：2018-01-03 19:00

本文关键词：加气混凝土砌块组合墙加固震损框架抗震性能试验　出处：《华南理工大学学报(自然科学版)》2016年10期 　论文类型：期刊论文

【摘要】：针对震损框架结构的整体抗震加固需求,提出一种将RC(钢筋混凝土)-加气混凝土砌块组合墙嵌入震损框架内部实现抗震加固的方法,通过模型试验探讨该加固方法的可行性.首先进行1∶2比例混凝土框架试件的预损试验,试件加载至大震损坏状态,然后将组合墙嵌入震损框架内部实现加固,再次进行加固框架试件的抗震性能试验.根据试验结果,分析了原框架、震损加固框架的破坏过程和滞回曲线特点,对比研究了两者在承载力、刚度、变形能力等方面的相同及差异之处.结果表明:对于大震震损框架,组合墙加固后其整体承载力与原框架基本一致或略有提高,屈服及极限阶段的等效抗侧刚度、耗能能力大于原框架,破坏阶段其变形能力及耗能略差于原框架.试验初步证明了组合墙加固震损框架是一种可行的加固方法.
[Abstract]:In order to meet the need of seismic reinforcement of seismic damaged frame structure, a method of seismic strengthening is proposed by embedding RC (reinforced concrete / aerated concrete block) composite wall into the interior of seismic damage frame. The feasibility of the method is discussed by model test. First, the pre-damage test of 1: 2 ratio concrete frame specimen is carried out, and the specimen is loaded to the damage state of strong earthquake. Then the composite wall is embedded inside the frame to reinforce, and the seismic behavior of the frame is tested again. According to the test results, the failure process and hysteretic curve characteristics of the original frame and the frame strengthened by earthquake damage are analyzed. The similarities and differences in bearing capacity, stiffness and deformation capacity between the two are compared. The results show that the frame is damaged by large earthquakes. The overall bearing capacity of the composite wall is basically the same or slightly increased as that of the original frame. The equivalent lateral stiffness and energy dissipation capacity of the composite wall at the yield and limit stages are larger than those of the original frame. The deformation capacity and energy consumption of the frame are slightly worse than those of the original frame in the failure stage. The experimental results show that the composite wall is a feasible reinforcement method for the seismic damage frame.
【作者单位】：中国建筑科学研究院建筑结构研究所;西安建筑科技大学土木工程学院;北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金资助项目(51308522)~~
【分类号】：TU352.11
【正文快照】： 我国近期几次大地震(如汶川8.0级地震、青海玉树7.1级地震等)的建筑震害调研表明,强震下大量框架结构出现不同程度的破坏,主要表现为填充墙破坏、框架梁(柱)端部破坏、部分丧失抵抗地震作用能力以及倒塌等[1-3].相当一部分震后受损框架结构仍然具有足够的竖向承载力,而抵抗水

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