华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (7): 57-67.doi: 10.3969/j.issn.1000-565X.2015.07.009

• 土木建筑工程 • 上一篇    下一篇

基于两阶段加载模式的改进模态推覆分析方法

蒋欢军1 雷杰1 吕尚文2   

  1. 1. 同济大学 土木工程防灾国家重点实验室//结构工程与防灾研究所,上海 200092; 2. 同济大学 建筑设计研究院( 集团) 有限公司,上海 200092
  • 收稿日期:2014-09-28 修回日期:2015-02-01 出版日期:2015-07-25 发布日期:2015-06-03
  • 通信作者: 蒋欢军( 1973-) ,男,博士,教授,主要从事工程结构抗震研究. E-mail:jhj73@tongji.edu.cn
  • 作者简介:蒋欢军( 1973-) ,男,博士,教授,主要从事工程结构抗震研究.
  • 基金资助:
    国家自然科学基金资助项目( 91315301-4) ; 国家“十二五”科技支撑计划项目( 2012BAJ13B02)

Improved Modal Pushover Analysis Based on Two-Stage Loading Pattern

Jiang Huan-jun1 Lei Jie1 Lü Shang-wen2   

  1. 1.State Key Laboratory of Disaster Prevention in Civil Engineering//Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China; 2.Architectural Design and Research Institute of Tongji University ( Group) Co.,LTD, Shanghai 200092,China
  • Received:2014-09-28 Revised:2015-02-01 Online:2015-07-25 Published:2015-06-03
  • Contact: 蒋欢军( 1973-) ,男,博士,教授,主要从事工程结构抗震研究. E-mail:jhj73@tongji.edu.cn
  • About author:蒋欢军( 1973-) ,男,博士,教授,主要从事工程结构抗震研究.
  • Supported by:
    Supported by the National Natural Science Foundation of China( 91315301-4) and the National Key Technology R&D Program of the Ministry of Science and Technology of China during the“12th Five-Yeat Plan”( 2012BAJ13B02)

摘要: 在模态推覆分析( MPA) 方法的基础上,提出了改进的模态推覆分析( IMPA) 方法; IMPA 方法克服了MPA 方法采用固定加载模式的不足,考虑对结构屈服前后采用分段的加载机制进行推覆分析; 并通过两个算例对IMPA 方法、MPA 方法计算得到的结构顶点位移和层间位移角与弹塑性时程分析结果进行了比较. 结果表明,IMPA 方法在评估结构地震反应时较MPA 方法在精度方面有了较大的提高.

关键词: 静力弹塑性分析, 模态推覆分析, 侧向荷载模式, 两阶段加载模式, 结构地震响应, 结构顶点位移, 层间位移角

Abstract: On the basis of the modal pushover analysis ( MPA) method, a method of improved modal pushover analysis ( IMPA) is proposed. This method overcomes the shortcomings of the fixed loading patterns of the MPA ( Modal Pushover Analysis) method, and its loading mechanisms before and after a structure yields are different. Then, by two examples, the IMPA method is compared with the MPA method in terms of roof displacement, interstory drift angle and elasto-plastic time-history. The results show that the IMPA method is much more accurate than the MPA method when the two methods are used to estimate the structural seismic response.

Key words: static elasto-plastic analysis, modal pushover analysis, lateral loading pattern, two-stage loading pattern, structural seismic response, roof displacement, inter-story drift angle

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