The Experts below are selected from a list of 15798 Experts worldwide ranked by ideXlab platform
Ulf Arne Girhammar - One of the best experts on this subject based on the ideXlab platform.
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evaluation of bending tests on composite glulam clt beams connected with double sided punched metal plates and inclined screws
Construction and Building Materials, 2015Co-Authors: Nicolas Jacquier, Ulf Arne GirhammarAbstract:Abstract Composite beam elements made of glulam beams and cross laminated timber (CLT) panels, and connected with a new Shear Connection system were tested under four point bending. The beams tested represent a section of a cassette floor element to be used in a multi-storey CLT construction system. The Shear Connection is primarily made of double-sided punched metal plate fasteners, connecting the CLT and glulam members to form a T-cross-section. Due to the uncertainty about the capacity of the double-sided nail plates to resist possible separation forces between the timber members, the Shear Connection may be secured with screws. Bending tests were performed with three Shear Connection configurations: double-sided punched metal plate fasteners only, inclined screws only, and double-sided punched metal plate fasteners combined with inclined screws. An additional test with a screw-glued Connection was made for comparison. The results show that a Shear Connection with double-sided nail plates can be designed to provide a sufficiently high level of composite action and load-carrying capacity and represents an alternative Shear Connection system for glulam–CLT composite floors.
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Tests on glulam–CLT Shear Connections with double-sided punched metal plate fasteners and inclined screws
Construction and Building Materials, 2014Co-Authors: Nicolas Jacquier, Ulf Arne GirhammarAbstract:Abstract A new Shear Connection system was tested in order to be used in off-site manufactured cassette floor elements made with glulam beams and cross laminated timber (CLT) panels. This type of floor element can present advantages from weight, structural and assembly point of view in multi-storey timber construction. The Shear Connection proposed is made of double-sided punched metal plate fasteners, connecting CLT and glulam members to form a T-cross-section. Inclined screws are used in combination with the double-sided nail plates to secure the Shear Connection. Shear test results are presented and compared with a simple calculation model for estimating the mean load-carrying capacity and stiffness of the combined joint according to methods available in the literature.
Emidio Nigro - One of the best experts on this subject based on the ideXlab platform.
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Shear Connection nonlinearity and deflections of steel concrete composite beams a simplified method
Journal of Structural Engineering-asce, 2003Co-Authors: Ciro Faella, Enzo Martinelli, Emidio NigroAbstract:In steel and concrete composite beams, the incomplete interaction between steel profile and concrete slab leads to an appreciable increase of the beam deflections with respect to full interaction behavior. Moreover, the concrete cracking in hogging moment regions of continuous beams needs to be considered. In this paper, a finite-element procedure considering nonlinear load–slip relationship for Shear connectors is presented. Such a procedure accounts for the concrete slab cracking and the resulting tension stiffening effect; it also assumes different load–slip relationships for Shear connectors in cracked slab. Some experimental comparisons show the accuracy of the proposed procedure. A wide parametric analysis is performed with reference to the evaluation of deflections for simply supported composite beams. Finally, a simplified method which is able to evaluate deflections for beams with nonlinear behaving Shear Connection is presented.
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steel and concrete composite beams with flexible Shear Connection exact analytical expression of the stiffness matrix and applications
Computers & Structures, 2002Co-Authors: Ciro Faella, Enzo Martinelli, Emidio NigroAbstract:Abstract A displacement-based finite element model for the analysis of steel and concrete composite beams with flexible Shear Connection is presented in this paper. No approximations are introduced in the displacement field, because the stiffness matrix and the fixed-end nodal force vector are directly derived from the “exact” solution of Newmark's differential equation. Therefore, the present finite element may employ only one element per member, because internal nodes are only needed for variations of geometrical and mechanical properties and in the presence of concentrated forces. A simple criterion to establish if partial interaction effects may be neglected in the analysis of composite beams is also suggested.
Nicolas Jacquier - One of the best experts on this subject based on the ideXlab platform.
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evaluation of bending tests on composite glulam clt beams connected with double sided punched metal plates and inclined screws
Construction and Building Materials, 2015Co-Authors: Nicolas Jacquier, Ulf Arne GirhammarAbstract:Abstract Composite beam elements made of glulam beams and cross laminated timber (CLT) panels, and connected with a new Shear Connection system were tested under four point bending. The beams tested represent a section of a cassette floor element to be used in a multi-storey CLT construction system. The Shear Connection is primarily made of double-sided punched metal plate fasteners, connecting the CLT and glulam members to form a T-cross-section. Due to the uncertainty about the capacity of the double-sided nail plates to resist possible separation forces between the timber members, the Shear Connection may be secured with screws. Bending tests were performed with three Shear Connection configurations: double-sided punched metal plate fasteners only, inclined screws only, and double-sided punched metal plate fasteners combined with inclined screws. An additional test with a screw-glued Connection was made for comparison. The results show that a Shear Connection with double-sided nail plates can be designed to provide a sufficiently high level of composite action and load-carrying capacity and represents an alternative Shear Connection system for glulam–CLT composite floors.
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Tests on glulam–CLT Shear Connections with double-sided punched metal plate fasteners and inclined screws
Construction and Building Materials, 2014Co-Authors: Nicolas Jacquier, Ulf Arne GirhammarAbstract:Abstract A new Shear Connection system was tested in order to be used in off-site manufactured cassette floor elements made with glulam beams and cross laminated timber (CLT) panels. This type of floor element can present advantages from weight, structural and assembly point of view in multi-storey timber construction. The Shear Connection proposed is made of double-sided punched metal plate fasteners, connecting CLT and glulam members to form a T-cross-section. Inclined screws are used in combination with the double-sided nail plates to secure the Shear Connection. Shear test results are presented and compared with a simple calculation model for estimating the mean load-carrying capacity and stiffness of the combined joint according to methods available in the literature.
Ciro Faella - One of the best experts on this subject based on the ideXlab platform.
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Shear Connection nonlinearity and deflections of steel concrete composite beams a simplified method
Journal of Structural Engineering-asce, 2003Co-Authors: Ciro Faella, Enzo Martinelli, Emidio NigroAbstract:In steel and concrete composite beams, the incomplete interaction between steel profile and concrete slab leads to an appreciable increase of the beam deflections with respect to full interaction behavior. Moreover, the concrete cracking in hogging moment regions of continuous beams needs to be considered. In this paper, a finite-element procedure considering nonlinear load–slip relationship for Shear connectors is presented. Such a procedure accounts for the concrete slab cracking and the resulting tension stiffening effect; it also assumes different load–slip relationships for Shear connectors in cracked slab. Some experimental comparisons show the accuracy of the proposed procedure. A wide parametric analysis is performed with reference to the evaluation of deflections for simply supported composite beams. Finally, a simplified method which is able to evaluate deflections for beams with nonlinear behaving Shear Connection is presented.
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steel and concrete composite beams with flexible Shear Connection exact analytical expression of the stiffness matrix and applications
Computers & Structures, 2002Co-Authors: Ciro Faella, Enzo Martinelli, Emidio NigroAbstract:Abstract A displacement-based finite element model for the analysis of steel and concrete composite beams with flexible Shear Connection is presented in this paper. No approximations are introduced in the displacement field, because the stiffness matrix and the fixed-end nodal force vector are directly derived from the “exact” solution of Newmark's differential equation. Therefore, the present finite element may employ only one element per member, because internal nodes are only needed for variations of geometrical and mechanical properties and in the presence of concentrated forces. A simple criterion to establish if partial interaction effects may be neglected in the analysis of composite beams is also suggested.
Enzo Martinelli - One of the best experts on this subject based on the ideXlab platform.
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Shear Connection nonlinearity and deflections of steel concrete composite beams a simplified method
Journal of Structural Engineering-asce, 2003Co-Authors: Ciro Faella, Enzo Martinelli, Emidio NigroAbstract:In steel and concrete composite beams, the incomplete interaction between steel profile and concrete slab leads to an appreciable increase of the beam deflections with respect to full interaction behavior. Moreover, the concrete cracking in hogging moment regions of continuous beams needs to be considered. In this paper, a finite-element procedure considering nonlinear load–slip relationship for Shear connectors is presented. Such a procedure accounts for the concrete slab cracking and the resulting tension stiffening effect; it also assumes different load–slip relationships for Shear connectors in cracked slab. Some experimental comparisons show the accuracy of the proposed procedure. A wide parametric analysis is performed with reference to the evaluation of deflections for simply supported composite beams. Finally, a simplified method which is able to evaluate deflections for beams with nonlinear behaving Shear Connection is presented.
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steel and concrete composite beams with flexible Shear Connection exact analytical expression of the stiffness matrix and applications
Computers & Structures, 2002Co-Authors: Ciro Faella, Enzo Martinelli, Emidio NigroAbstract:Abstract A displacement-based finite element model for the analysis of steel and concrete composite beams with flexible Shear Connection is presented in this paper. No approximations are introduced in the displacement field, because the stiffness matrix and the fixed-end nodal force vector are directly derived from the “exact” solution of Newmark's differential equation. Therefore, the present finite element may employ only one element per member, because internal nodes are only needed for variations of geometrical and mechanical properties and in the presence of concentrated forces. A simple criterion to establish if partial interaction effects may be neglected in the analysis of composite beams is also suggested.
