RC异形柱框架抗连续倒塌静载试验研究  

Static load experimental research on RC special-shaped columns frame's progressive collapse resistance

作　　者：戎贤[1,2] 仉庆文[1,2] 赵玉婷[1,2] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]河北省土木工程技术研究中心,天津300401

出　　处：《世界地震工程》2017年第2期178-185,共8页World Earthquake Engineering

基　　金：国家自然科学基金NSFC(51178304)

摘　　要：按照我国现有抗震标准设计了一个1/3缩尺的两层3×2跨异形柱框架结构模型,并在替代柱的二层柱顶进行了竖向静力加载,以研究模型框架在失去底层短边中柱后,框架结构在倒塌破坏过程中的受力特性、破坏机理以及最终的破坏形态。研究结果表明:框架的倒塌破坏全过程可分为弹性阶段、弹塑性阶段、塑性阶段和悬链线阶段;梁端塑性铰、框架梁的悬链线作用及失效柱相邻跨内梁板柱的空间作用,可有效提高结构的抗连续倒塌能力;框架结构顶层角部的梁柱节点为关键构件。According to country＇ s existing seismic standards, a 1/3 scale, two story and 3 × 2 span special- shaped column frame model was designed. Applying a vertical static load on the alternative column＇ s second-floor- column＇s top position to study structure＇s mechanical characteristics, failure mechanism and pattern during the process of collapse after the failure of middle column in the bottom floor＇ s short edge. The study results show that the frame＇ s collapse process can be divided into four stages：elastic stage, elastoplastic stage, plastic stage and cat- enary stage. The functions of beam end plastic hinge and frame beam catenary, and the spatial function of beam-slab column in neighboring spans of failure column may improve the structure＇ s continuous collapse resistance ability. The top corner＇ s the beam-column joints of the frame structure are the key artifacts.

关 键 词：异形柱框架 连续倒塌 静载试验 边柱 

分 类 号：TU378[建筑科学—结构工程]