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- 저자 : Danrong Shi (검색결과 1 건)
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Flexural Performance of Composite Beams Using High-Strength Steel and High-Strength Concrete
Hao Du,Xiamin Hu,Danrong Shi,Wei Xue 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.1
The composite beams having high-strength steel (HSS) and high-strength concrete (HSC) can fully exploit the mechanical behavior of both materials. However, the published research on the structural behavior of composite beams using HSS and HSC is limited. In order to study the infl uences of shear connection degree and concrete strength on the fl exural performance of composite beams using HSS and HSC, four composite beam specimens were constructed and loaded under four-point bending test in the present study. The test results showed that the failure mechanism of the fully connected composite beams was the bending failure of steel beam and crushing failure of concrete slab. The failure mode of the partially connected composite beams was the shear failure of stud connectors and bending failure of steel beam. The composite beams having 65% and 162% shear connection degree achieved the load bearing capacity of 18.8% and 25.3% higher than the composite beam having 38% shear connection degree. With the shear connection degree increased, the bending bearing capacity of the composite beam was enhanced. The concrete strength had no obvious impact on the fl exural capacity of the composite beam having HSS and HSC. Moreover, the analytical models were put forward to predict the fl exural capacity and bending stiff ness of the composite beam using HSS and HSC.
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