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Steel and Composite Structures Volume 20, Number 6, April30 2016 , pages 1183-1191 DOI: https://doi.org/10.12989/scs.2016.20.6.1183 |
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Investigation on the failure mechanism of steel-concrete steel composite beam |
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Guang P. Zou, Pei X. Xia, Xin H. Shen and Peng Wang
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| Abstract | ||
| The internal crack propagation, the failure mode and ultimate load bearing capacity of the steelconcrete-steel composite beam under the four-point-bend loading is investigated by the numerical simulation. The results of load - displacement curve and failure mode are in good agreement with experiment. In order to study the failure mechanism, the composite beam has been modeled, which part interface interaction between steel and concrete is considered. The results indicate that there are two failure modes: (a) When the strength of the interface is lower than that of the concrete, failure happens at the interface of steel and concrete; (b) When the strength of the interface is higher than that of the concrete, the failure modes is cohesion failure, i.e., and concrete are stripped because of the shear cracks at concrete edge. | ||
| Key Words | ||
| steel-concrete-steel composite beam; interface; crack propagation; failure mode; ultimate bearing capacity | ||
| Address | ||
| College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150001, China. | ||