Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (7): 57-67.doi: 10.3969/j.issn.1000-565X.2015.07.009

• Architecture & Civil Engineering • Previous Articles     Next Articles

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)

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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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