Structural Engineering and Mechanics

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Numerical parametric analysis on the ultimate bearing capacity of the purlin-sheet roofs connected by standing seam clips

  • Zhang, Yingying (State Key Laboratory for Geomechanics and Deep Underground Engineering, Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology) ;
  • Song, Xiaoguang (Shandong Academy of building research) ;
  • Zhang, Qilin (College of Civil Engineering, Tongji University)
  • Received : 2016.08.02
  • Accepted : 2017.03.15
  • Published : 2017.07.25
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Abstract

This paper presents the parametric numerical analysis on the ultimate bearing capacity of the purlin-sheet roofs connected by standing seam clips. The effects of several factors on failure modes and ultimate bearing capacity of the purlins are studied, including setup of anti-sag bar, purlin type, sheet thickness and connection type et al. A simplified design formula is proposed for predicting the ultimate bearing capacity of purlins. Results show that setting the anti-sag bars can improve the ultimate bearing capacity and change the failure modes of C purlins significantly. The failure modes and ultimate bearing capacity of C purlins are significantly different from those of Z purlins, in the purlin-sheet roof connected by standing seam clips. Setting the anti-sag bars near the lower flange is more favorable for increasing the ultimate bearing capacity of purlins. The ultimate bearing capacity of C purlins increases slightly with sheet thickness increasing from 0.6 mm to 0.8 mm. The ultimate bearing capacity of the purlin-sheet roofs connected by standing seam clips is always higher than those by self-drilling screws. The predictions of the proposed design formulas are relatively in good agreement with those of EN 1993-1-3: 2006, compared with GB 50018-2002.

Keywords

Acknowledgement

Supported by : Central Universities

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