华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (12): 132-137.

• 土木建筑工程 • 上一篇    下一篇

多层结构局部延性与整体延性需求关系解析

周靖1 方小丹2   

  1. 1.华南理工大学 亚热带建筑科学国家重点实验室,广东 广州 510640; 2.华南理工大学 建筑设计研究院,广东 广州 510640
  • 收稿日期:2011-05-16 修回日期:2011-06-19 出版日期:2011-12-25 发布日期:2011-11-04
  • 通信作者: 周靖(1974-) ,男,博士,副教授,主要从事工程结构抗震性能研究. E-mail:jingzhchina@163.com
  • 作者简介:周靖(1974-) ,男,博士,副教授,主要从事工程结构抗震性能研究.
  • 基金资助:

    中国博士后科学基金资助项目( 20100480757 ) ; 教育部高等学校博士学科点专项科研基金资助项目( 20094301120001) ; 亚热带建筑科学国家重点实验室基金资助项目( 2010KB13)

Analysis of Relationship Between Local and Global Ductility Demands of Multi-Rise Structures

Zhou JingFang Xiao-dan2   

  1. 1. State Key Laboratory of Subtropical Architecture Science,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Architecture Design Research Institute,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-05-16 Revised:2011-06-19 Online:2011-12-25 Published:2011-11-04
  • Contact: 周靖(1974-) ,男,博士,副教授,主要从事工程结构抗震性能研究. E-mail:jingzhchina@163.com
  • About author:周靖(1974-) ,男,博士,副教授,主要从事工程结构抗震性能研究.
  • Supported by:

    中国博士后科学基金资助项目( 20100480757 ) ; 教育部高等学校博士学科点专项科研基金资助项目( 20094301120001) ; 亚热带建筑科学国家重点实验室基金资助项目( 2010KB13)

摘要: 在理想模型结构假定基础上,采用理论分析方法,推导出多层结构整体延性需求与楼层延性需求、以及楼层延性需求与竖向支撑构件延性需求的简化解析关系.最不利解析关系以及数值算例结果表明: 薄弱层局部延性需求大于整体结构延性需求; 增加楼层数,薄弱层局部延性需求增大; 楼层屈服后刚度对局部与整体延性需求的关系也有重要影响;弱柱单元延性与楼层延性需求的关系跟强柱、弱柱的侧向刚度比以及抗侧屈服强度比相关,刚度比越大弱柱延性需求越小( 下限) ,强度比越大弱柱延性需求越大( 上限) .

关键词: 建筑结构, 延性需求, 侧向刚度, 理论解析

Abstract:

Based on a reasonable assumption of modeled structures,simplified analytical relationships between global ductility demands and local-storey ductility demands,as well as between local-storey ductility demands and vertical element ductility demands,are derived by theoretical analysis for multi-rise structures. Both the most unfavorable analytical relationship and the numerical results indicate that ( 1) the local ductility demand of the weak storey is larger than the global one and increases owing to any additional storey; ( 2) the post-yield stiffness of storey greatly influences the relationship between the local and the global ductility demands; ( 3) the relationship between the soft-weak column element and the local storey ductility demands correlates with the lateral stiffness ratio and the yield strength ratio of the strong column to the weak column; and ( 4) the ductility demand of the soft-weak column ( the lower limit) decreases with the increase in the stiffness ratio but increases ( the upper limit) with the yield strength ratio.

Key words: building structure, ductility demand, lateral stiffness, theoretical analysis

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