建筑结构

2008, No.299(11) 52-59+67

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从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现
Study on ensuring the strong column-weak beam mechanism for RC frames based on the damage analysis in the Wenchuan earthquake

叶列平;曲哲;马千里;林旭川;陆新征;潘鹏;
Ye Lieping,Qu Zhe,Ma Qianli,Lin Xuchuan,Lu Xinzheng,Pan Peng(Department of Civil Engineering,Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua University,Beijing 100084,China)

摘要(Abstract):

对汶川地震中钢筋混凝土框架结构的主要震害现象进行了简要分析。重点针对地震中框架结构未出现抗震设计所预期的"强柱弱梁"屈服机制的现象,从填充墙等非结构构件和楼板的影响、可能导致框架梁承载力和刚度增大的原因、造成框架梁端超配筋的原因、影响框架柱承载力发挥的原因,以及结构在大震下受力状态变化和不同受力阶段的梁柱构件的可靠度差异等方面进行深入的分析,并提出了有关建议,为今后框架结构设计实现"强柱弱梁"屈服机制和规范修订提供了参考。
Typical earthquake damages of RC frames in the Wenchuan earthquake are reviewed with some brief analyses.Special attentions are given to the absence of the preferable damage mode known as the "strong column-weak beam" mechanism.Analysis is conducted in depth in order to discover the underlying reasons for this adverse phenomenon in the following aspects: influence of the partitions and floor slabs,possible reasons for under-estimating the strength and stiffness of frame beams,reasons for the over-reinforcement of frame beams,factors that may weaken frame columns,structural model changing under stronger earthquake,the difference of reliability of columns and beams under different load stages and so on.Suggestions of ensuring the "strong column-weak beam" mechanism for RC frames are proposed for the reference of future design and code revision.

关键词(KeyWords): 汶川地震;框架;震害;强柱弱梁
Wenchuan earthquake;frames;damage;strong column-weak beam mechanism

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划课题(2006BAJ03A02)

作者(Author): 叶列平;曲哲;马千里;林旭川;陆新征;潘鹏;
Ye Lieping,Qu Zhe,Ma Qianli,Lin Xuchuan,Lu Xinzheng,Pan Peng(Department of Civil Engineering,Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua University,Beijing 100084,China)

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DOI: 10.19701/j.jzjg.2008.11.017

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