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http://dx.doi.org/10.12989/scs.2019.31.1.027

Shear lag effect in steel-concrete composite beam in hogging moment  

Luo, Da (College of Civil Engineering and Architecture, Guangxi University)
Zhang, Zhongwen (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University)
Li, Bing (School of Civil and Environmental Engineering, Nanyang Technological University)
Publication Information
Steel and Composite Structures / v.31, no.1, 2019 , pp. 27-41 More about this Journal
Abstract
Shear lag effect can be an important phenomenon to consider in design of the steel-concrete composite beams. Researchers have found that the effect can be strongly related with the moment distribution, the stiffness and the ductility of the composite beams. For continuous composite beams expected to sustain hogging moment, the shear lag effect can be more distinct as cracking of the concrete slab reduces its shear stiffness. Despite its influences on behaviour of the steel-concrete composite beams, a method for calculating the shear lag effect in steel-concrete composite beams sustaining hogging moment is still not available. Shear lag effect in steel-concrete composite beams sustaining hogging moment is investigated in this paper. A method was proposed specifically for predicting the effect in the cracked part of the steel-concrete composite beam. The method is validated against available experimental data. At last, FE studies are conducted for steel-concrete composite beams with different design parameters, loading conditions and boundary conditions to further investigate the shear lag effect and compare with the proposed method.
Keywords
steel-concrete composite beams; composite structure; shear lag effect; truss analogy;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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