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RISS 인기검색어
- 검색키워드
- 저자 : Marcela N. Kataoka (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Experimental investigation of longitudinal shear behavior for composite floor slab
Marcela N. Kataoka,Juliana T. Friedrich,Ana Lúcia H.C. El Debs 국제구조공학회 2017 Steel and Composite Structures, An International J Vol.23 No.3
This paper presents an experimental study on the behavior of composite floor slab comprised by a new steel sheet and concrete slab. The strength of composite slabs depends mainly on the strength of the connection between the steel sheet and concrete, which is denoted by longitudinal shear strength. The composite slabs have three main failures modes, failure by bending, vertical shear failure and longitudinal shear failure. These modes are based on the load <i>versus</i> deflection curves that are obtained in bending tests. The longitudinal shear failure is brittle due to the mechanical connection was not capable of transferring the shear force until the failure by bending occurs. The vertical shear failure is observed in slabs with short span, large heights and high concentrated loads subjected near the supports. In order to analyze the behavior of the composite slab with a new steel sheet, six bending tests were undertaken aiming to provide information on their longitudinal shear strength, and to assess the failure mechanisms of the proposed connections. Two groups of slabs were tested, one with 3000 mm in length and other with 1500 mm in length. The tested composite slabs showed satisfactory composite behavior and longitudinal shear resistance, as good as well, the analysis confirmed that the developed sheet is suitable for use in composite structures without damage to the global behavior.
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Computer modeling and analytical prediction of shear transfer in reinforced concrete structures
Marcela N. Kataoka,Ana Lúcia H.C. El Debs,Daniel de L. Araújo,Bárbara G. Martins 사단법인 한국계산역학회 2020 Computers and Concrete, An International Journal Vol.26 No.2
This paper presents an evaluation of shear transfer across cracks in reinforced concrete through finite element modelling (FEM) and analytical predictions. The aggregate interlock is one of the mechanisms responsible for the shear transfer between two slip surfaces of a crack; the others are the dowel action, when the reinforcement contributes resisting a parcel of shear displacement (reinforcement), and the uncracked concrete comprised by the shear resistance until the development of the first crack. The aim of this study deals with the development of a 3D numerical model, which describes the behavior of Z-type push-off specimen, in order to determine the properties of interface subjected to direct shear in terms cohesion and friction angle. The numerical model was validated based on experimental data and a parametric study was performed with the variation of the concrete strength. The numerical results were compared with analytical predictions and a new equation was proposed to predict the maximum shear stress in cracked concrete.
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Study on the behavior of beam-column connection in precast concrete structure
Marcela N. Kataoka,Marcelo A. Ferreira,Ana Lúcia H.C. El Debs 사단법인 한국계산역학회 2015 Computers and Concrete, An International Journal Vol.16 No.1
Due to the increase of the use of precast concrete structures in multistory buildings, this paper deals with the behavior of an specific type of beam-column connection used in this structural system. The connection is composed by concrete corbels, dowels and continuity bars passing through the column. The study was developed based on the experimental and numerical results. In the experimental analysis a full scale specimen was tested and for numerical study, a 3D computational model was created using a finite element analyze (FEA) software, called DIANA. The comparison of the results showed a satisfactory correlation between loading versus displacement curves.
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