• ISSN 0258-2724
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Volume 28 Issue 4
Jul.  2015
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Article Contents
Journal of Southwest Jiaotong University  > 2015  >  28(4): 648-655.
LI Longqi, ZHOU Donghua, LIAO Wenyuan, CHEN Xu, YAO Kaicheng. Experimental Study on Shear Bearing Behavior of Continuous Steel-Concrete Composite Beams with Web Openings[J]. Journal of Southwest Jiaotong University, 2015, 28(4): 648-655. doi: 10.3969/j.issn.0258-2724.2015.04.012
Citation: LI Longqi, ZHOU Donghua, LIAO Wenyuan, CHEN Xu, YAO Kaicheng. Experimental Study on Shear Bearing Behavior of Continuous Steel-Concrete Composite Beams with Web Openings[J]. Journal of Southwest Jiaotong University, 2015, 28(4): 648-655. doi: 10.3969/j.issn.0258-2724.2015.04.012
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Experimental Study on Shear Bearing Behavior of Continuous Steel-Concrete Composite Beams with Web Openings

doi: 10.3969/j.issn.0258-2724.2015.04.012
  • Received Date: 22 Mar 2014
  • Publish Date: 25 Aug 2015
    Abstract
  • In order to investigate the shear bearing behavior of continuous steel-concrete composite beams with web openings, five continuous composite beams with web openings under two monotonic symmetric concentrated loads were tested using the thickness and reinforcement ratio of slabs as variables. The shear separation method was introduced to calculate the shear stress borne by concrete slabs and steel beams of composite beams. The test results show that web openings not only decrease the stiffness and ultimate load-carrying capacity but also give rise to the redistribution of vertical shear force of steel beams and concrete slabs; that is, the concrete slab bears 85%-90% of the total cross-section shear at the web opening region. The plane hypothesis is not valid in the web opening area. The failure mode is the shear failure of concrete slab in the region near the opening. In addition, the ultimate load-carrying capacity and deformability of continuous composite beams can be increased by increasing the thickness and reinforcement ratio of a concrete slab, which can be used for enhancement of the web opening area.

     

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