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http://dx.doi.org/10.12989/scs.2021.38.5.599

Behaviors of novel sandwich composite beams with normal weight concrete  

Yan, Jia-Bao (School of Civil Engineering / Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University)
Dong, Xin (School of Civil Engineering / Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University)
Wang, Tao (Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics)
Publication Information
Steel and Composite Structures / v.38, no.5, 2021 , pp. 599-615 More about this Journal
Abstract
The ultimate strength behaviour of sandwich composite beams with J-hooks and normal weight concrete (SCSSBJNs) are studied through two-point loading tests on ten full-scale SCSSBJNs. The test results show that the SCSSBJN with different parameters under two-point loads exhibits three types of failure modes, i.e., flexure, shear, and combined shear and flexure mode. SCSSBJN failed in different failure modes exhibits different load-deflection behaviours, and the main difference of these three types of behaviours exist in their last working stages. The influences of thickness of steel faceplate, shear span ratio, concrete core strength, and spacing of J-hooks on structural behaviours of SCSSBJN are discussed and analysed. These test results show that the failure mode of SCSSBJN was sensitive to the thickness of steel faceplate, shear span ratio, and concrete core strength. Theoretical models are developed to estimate the cracking, yielding, and ultimate bending resistance of SCSSBJN as well as its transverse cross-sectional shear resistance. The validations of predictions by these theoretical models proved that they are capable of estimating strengths of novel SCSSBJNs.
Keywords
sandwich structures; bending tests; composite structures; J-hook connectors; theoretical models; ultimate strength behaviour; normal weight concrete; steel-concrete-steel;
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