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RISS 인기검색어
- 검색키워드
- 저자 : Messaoud Titoum (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Effects of Partial Shear Connection on the Behavior of Semi-continuous Composite Beams
Messaoud Titoum,Mohamed Tehami,Belkacem Achour 한국강구조학회 2009 International Journal of Steel Structures Vol.9 No.4
In this paper, the effects of partial shear connection on the behavior of semi-continuous composite beams were studied numerically using two-dimensional finite element model with plane stress elements. The finite element model takes into account the nonlinearity of the different materials involved. For the shear connectors, a non-linear (shear-slip) relation, drawn from the push-out tests, was used. The accuracy of the proposed finite element model was verified against test results available in the literature. A simplified method to predict load capacity and deflection of the semi-continuous composite beams was also proposed. Based on the results obtained from the finite element analysis, the concept of partial shear connection in the hogging moment regions can be accepted provided that the shear connectors are sufficiently ductile. In this paper, the effects of partial shear connection on the behavior of semi-continuous composite beams were studied numerically using two-dimensional finite element model with plane stress elements. The finite element model takes into account the nonlinearity of the different materials involved. For the shear connectors, a non-linear (shear-slip) relation, drawn from the push-out tests, was used. The accuracy of the proposed finite element model was verified against test results available in the literature. A simplified method to predict load capacity and deflection of the semi-continuous composite beams was also proposed. Based on the results obtained from the finite element analysis, the concept of partial shear connection in the hogging moment regions can be accepted provided that the shear connectors are sufficiently ductile.
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Experimental evaluation of new channel shear connector shapes
Bilal Maghaghi,Messaoud Titoum,Aida Mazoz 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.3
In a steel–concrete composite beam, the channel shear connector is an easy solution to ensure the connection due to its availability and the simplicity of its welding. However, increasing the channel shear connector length negatively aff ects the concrete slabs and creates diffi culties to cross the longitudinal reinforcing bars. To solve this problem, fi ve new channel shear connector shapes are proposed and studied in this paper. Twelve push-out tests using a new setup, and three pull-out tests, were carried out under monotonic loading to identify the shape that gives the best performance. The failure modes, the eff ects of new channel shapes on the load-slip behavior, the concrete slaps, the bending deformation, and the height between the two plastic hinges that appeared near the base of channel connectors were mainly studied. The study reveals that the modifi cation of the channel shear connector shape is a promising way and positively infl uences the concrete-connector relationship and also the bending deformation capacity of the channel connector. As a result, the concrete cracking decreased, the ductility increased between about 15–31%, and the ultimate strength improved slightly between about 0–5.1%. Finally, the experimental results are compared to the existing equations.
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Push-out Tests on a New Shear Connector of I-shape
Aida Mazoz,Abdelkader Benanane,Messaoud Titoum 한국강구조학회 2013 International Journal of Steel Structures Vol.13 No.3
In steel-concrete composite beams, the shear connectors are commonly used to transfer the longitudinal shear forces across the steel-concrete interface. This paper summarizes the results of 24 push-out test specimens with a new type of shear connector called “I-shape connector”. The test specimens were designed to study the effect of the following parameters on the ultimate load capacity: the height of I-shape connector, the length of I-shape connector, the compressive strength of concrete and the number of transverse reinforcing bars. The experimental results are presented and discussed, focusing on the failure modes and load-slip behaviour. Finally, the experimental results are compared to the existing design equations to predict the ultimate load capacity of I-shape shear connectors.
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