密肋复合墙体框格单元结构刚度与承载力分析  

Analysis of stiffness and load-resisting capacity of fundamental frame structures in high-performance concrete multi-rib walls

作　　者：喻磊[1] 姚谦峰[1] 岳亚锋[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安欧亚学院建筑工程系,陕西西安710065

出　　处：《西安建筑科技大学学报（自然科学版）》2006年第1期23-29,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家十五科技攻关项目资助(2002BA806B05);陕西省重点试验室项目资助(O2JS28)

摘　　要：简要介绍了高性能混凝土密肋复合墙体框格结构1/2比例模型试验结果.试验表明随着外荷载的增加,填充砌体在某些部位与外围框格分离,形成砌体斜压杆.所有试件均出现角区压碎破坏且在RC构件内部形成塑性铰.填充砌体可明显提高空RC框格结构的侧向刚度与极限承载能力.高宽比对砌体填充RC框格结构的侧向刚度与极限承载能力有很大影响.结合试验结果,对文献建议的多种侧向刚度与承载能力评估方法进行分析与探讨.提出了一种新型砌体填充RC框格结构极限承载能力计算方法.该方法适用于高宽比大于1的结构.计算结果与试验规律一致,吻合较好.This paper presents test results of laboratory models consisting of fundamental frame structures in high-performance concrete multi-rib walls. The results indicate that the infill tends to Partially separate from the bounding frame as the load increases, All specimens develop a distinct compression strut mechanism and eventually lead to corner masonry crushing and plastic hinges in the frame members. The infilled masonry can significantly improve the initial stiffness and load-resisting capacity of bare RC frames. The aspect ratio of structures appears to be influential with respect to the initial stiffness and load-resisting capacity, Eight evaluation methods introduced in literatures for the stiffness and load-resisting capacity of structures are discussed, A new load-resistlng capacity calculation method is proposed for masonry infilled RC fundamental frames,which is suitable for structures with aspect ratio r〉 1. The calculated results of specimens using the method are in good agreement with the test data. This paper will be helpful for further experimental research and theoretical study on multi-rib wall structures.

关 键 词：高性能混凝土 破坏模式 侧向刚度 承载能力 

分 类 号：TU312[建筑科学—结构工程]