框架结构强柱弱梁地震破坏模式形成探讨

英文篇名：Disscussion on frame structure strong column weak beams pattern formation of earthquake damage
中文刊名：建筑结构
英文刊名：Building Structure
作者：滕军 ; 曹冬雪 ; 李祚华 ; 吕海霞
英文作者：Teng Jun ; Cao Dongxue ; Li Zuohua ; Lü Haixia(Harbin Institute of Technology Shenzhen Graduate School ; Shenzhen 518055 ; China)
中文关键词：框架结构 ; 强柱弱梁 ; 现浇楼板 ; 汶川地震
英文关键词：strong column weak beam ; concrete frame ; cast-in-situ floor ; Wenchuan earthquake
出版日期：2011-04-15
机构：哈尔滨工业大学深圳研究生院;
年：2011
期：S1
出版单位：建筑结构

摘要

针对汶川震害中钢筋混凝土框架结构较多形成柱铰破坏的现象,通过对简化模型和精细化模型在静力、动力荷载作用下所形成破坏机制的对比分析,得到二者在屈服模式上的不同,简化模型可以实现"强柱弱梁"破坏模式,而精细化模型无法实现"强柱弱梁"的破坏模式。通过对有无楼板框架结构以及弹性楼板结构和弹塑性楼板结构的对比分析,进一步研究了现浇楼板对"强柱弱梁"破坏模式形成的影响。分析结果表明,在结构整体地震反应分析中,宜建立精细化模型来充分考虑现浇楼板的空间作用,进而能够真实地反映结构的地震破坏模式。
In view of many reinforced concrete frame structures are destroyed first column plastic hinge then beam in earthquake at present,the paper gets two different patterns in yield through the analysis of the difference between the simple model and refinement model in failure mechanism under load: simplified model can implement 'strong column weak beam' failure mode,but the fine model.In addition,based on comparison of slab frame structure and without,and then structure with elastic floor and elastic-plastic floor,this paper discusses the the role of cast-in-situ floor in formation of 'strong column weak beam' failure mode.The different result reveals the essence that simplified model tends to unsafe on the problem considering 'strong column weak beam' in the design.

引文

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