Engineering Mechanics ›› 2019, Vol. 36 ›› Issue (1): 175-182.doi: 10.6052/j.issn.1000-4750.2017.11.0851

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SHEAR CAPACITY CALCULATION METHOD OF PANEL ZONE IN REINFORCED CONCRETE FRAME UNDER BIDIRECTIONAL LOADING

LI Zheng-bao1, CUI Yan-wei1,2, SONG Kun3, MA Hua1, TANG Zhen-yun1   

  1. 1. Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing, 100124, China;
    2. School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan, 467036, China;
    3. School of Architecture Engineering and Mechanics, Yanshan University, Qinhuangdao, 066004, China
  • Received:2017-11-10 Revised:2018-05-23 Online:2019-01-29 Published:2019-01-10

Abstract: According to the provisions of the Chinese Code for Seismic Design of Buildings (GB 50011-2010), the anti-seismic capability of a frame structure in two horizontal directions are designed respectively. However, earthquake action is multi-dimensional and random, which will make a panel zone in a frame structure be loaded by bidirectional actions at the same time. Thusly, its anti-seismic capability may be lower than the designed capability based on a unidirectional earthquake action. So far, the detailed calculation methods of shear capability for a panel zone in a reinforced concrete (RC) frame subjected to bidirectional loading have not been reported. In this work, the shear mechanism of a panel zone in a RC frame under bidirectional loading was analyzed. It demonstrated that a synthetic shear force is imposed on a panel zone, the oblique compression zone comes into being at the end of a panel zone, and the diagonal strut is formed in a panel zone, which is different from the shear mechanism under unidirectional loading. A shear capacity calculation model was established based on the strut and tie model, and the predicted values by this work are in a good agreement with the reported experimental results.

Key words: panel zone, multi-dimensional earthquake excitation, bidirectional loading, shear strength, strut and tie model

CLC Number: 

  • TU375.4
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