An Analytical Model For Analysis of Steel-Concrete Composite Beams Under Monotonic and Repeated Loads

May 2, 2023

Journal Journal of Optimization and Decision Making

publisher Ankara Yildirim Beyazit University

Issue 2

Volume 2

This paper presents a numerical model for non-linear analyze steelconcrete composite beam subjected to monotonic and repeated loading with partial and full interaction. The model is constructed by a modified FORTRAN computer program. The nonlinear responsiveness for the composite beam is depending on dividing the element into fibers using a section layered method with the constituent materials hysteretic models. A derivation of the cyclic model for concrete, reinforcing bar and steel has been adopted. The behavior of the shear connectors under repeated load has also been derived. Since the slip between the components of composite beams is considered as a basic factor in the analysis, a slip model is adopted to estimate its amount. The numerical model is validated using experimental results. The results indicate that the presented numerical model can provide an effective tool for analyzing steel-concrete composite beam.

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Shear bond behaviour of elemental composite beams with different configurations

Dec 15, 2019

Journal Engineering Structures

publisher Elsevier

DOI https://doi.org/10.1016/j.engstruct.2019.109742

Volume 201

In this study, an experimental program for testing steel concrete composite slabs subjected to symmetrical double line loads has been carried out to investigate the longitudinal shear bond behaviour. Different configurations of steel concrete composite slabs with and without embossments were studied. The flexural characteristics, ultimate strength and bond strength (end slip test) of composite slabs were determined. Partial connection (PC) approach was used to predict the longitudinal shear bond. The embossments in the profile decks slightly enhanced the longitudinal shear resistance and load carrying capacity (especially, at the end of the plastic stage), and also delayed debonding. Two failure modes, brittle and ductile phases, were observed during the tests. The experimental results demonstrated that the embossments do not have promising contributions to longitudinal shear strength and ductility of the composite slab elements, especially to elastic and plastic behaviour stages prior to the ultimate load carrying capacity. This study proposes a semi empirical formula (SEF) to evaluate the shear stress using simplification of the m-k method. The proposed SEF method was validated with data obtained from literature, showing an acceptable level of reliability and therefore, it could represent a good alternative for m-k and PC methods.

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Prediction of longitudinal shear resistance of steel-concrete composite slabs

Aug 15, 2019

Journal Engineering Structures

publisher Elsevier

DOI https://doi.org/10.1016/j.engstruct.2019.05.010

Volume 193

In this study, steel-concrete composite slabs are subjected to symmetrical double line loads, and the prediction of longitudinal shear resistance capacity is evaluated using the shear bond mechanism or m-k procedure. The current study uses the experimental testing data with a sufficient shear span distance to predict the effect of the normal force at the interface between the steel plates and concrete which is normally insignificant. All the flexural tested specimens are carried out with the same profiled rib details and the longitudinal shear resistance of composite slabs is measured and compared. Experimental results showed over-estimation of the longitudinal shear resistance because of the frictional force between the profiled steel sheet and the concrete. However, it increases according to the increase of the normal force at the interface between the steel plate and concrete core. The response of different shear spans on the bond strength and load carrying capacity is examined in both elastic and plastic stages. Based on the experimental measurements, we propose a new simplification for m-k curves, called ‘λ-q’. This simplification (λ-q) can be used as a guideline to develop new formula taking into account other parameters, such as, embossments, shears connector, slips and shape factor.

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Seismic Performance of Moment End-Plate Connections to CFT Column under Cyclic Loading

Apr 15, 2013

Journal Advanced Materials Research

publisher rans Tech Publications Ltd

DOI https://doi.org/10.4028/www.scientific.net/AMR.680.205

Volume 680

An experimental program under cyclic load is performed on two half-scale interior moment end-plate connections to concrete filled tubular (CFT) columns. Flat and curved stiffened extended end-plates were welded to the steel beams in the shop, and bolted on the site to the square and circular CFT column tubes respectively, using steel rods passing through the column. The experimental results demonstrated that both circular and rectangular end-plate connections showed similar performance in a ductile manner and the stiffener elements were effective to form the plastic hinges away from the welding zone, also the proposed curved end-plate connection with rods passing through the column in “X” shape was effective. The test specimens showed a plastic rotations capacity of 0.054 radian.

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Experimental investigation of CFT column to steel beam connections under cyclic loading

Mar 1, 2013

Journal Journal of Constructional Steel Research

publisher Elsevier

DOI https://doi.org/10.1016/j.engstruct.2019.05.010

Volume 86

Four half-scale interior connections with steel beams and concrete filled tubular (CFT) columns were tested, under cyclic displacement controlled load. Square and circular steel tubular columns were considered with two different types of connections. (i) Shop welded, flat and curved extended end-plates bolted to the CFT column with steel rods passing through the column and (ii) a through beam connection type, where the beam passes through the joint and is connected with an additional bolted bracket without using any welding between the beam and the column. The experiments demonstrated that all the subassemblies performed in a ductile manner to large displacements with no apparent signs of local distress in the tube wall. Rods passing through the columns in both cases were effective. Both circular and rectangular end-plate connections showed similar performance. Also, the through beam connections behaved very well.

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Optimum Design of Singly and Doubly Reinforced Concrete Rectangular Beam Sections: Artificial Neural Networks Application

Jun 1, 2010

Journal Iraqi Journal of Civil Engineering

publisher iraq

Issue 3

Volume 6

Construction of concrete structures involves at least two different main materials: concrete and steel. Design of these structures should be based on cost rather than weight minimization. In this work, least cost design of singly and doubly reinforced beams is done by applying of the Lagrangian multipliers method (LMM) under ultimate design constraint beside other constraints. Cost objective functions and moment constraints are derived and implemented within the optimization method. The optimum solution comparisons with conventional design methods are performed and the result reported, showing that the LMM can be successfully applied to the minimum cost deign of reinforced concrete beams without need for iterative trials. Optimum design solution surfaces have been developed. Good and reliable results have been obtained and confirmed by using standard design procedures. The artificial neural networks (ANN) has been trained with design data obtained from optimal design formulas. After successful trials, the model predicted the optimum depth of the beam sections and optimum areas of steel required for the problems with accuracy satisfying all design constraints.

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An Analytical Model For Analysis of Steel-Concrete Composite Beams Under Monotonic and Repeated Loads

Mar 2, 2023 - Apr 2, 2023

Publisher College of Engineering / Yildirim Beyazit University – Ankara / Turkey,

Country Turkey

Location Ankara / Turkey

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Through beam with bolted brackets connections for CFT column with steel beam

Mar 21, 2014 - Mar 23, 2014

Publisher 2014 NZSEE Conference

Country Auckland in New Zealand

Location in the Aotea Centre, a venue conveniently located in the centre of the Auckland CBD and within walking distance from a range of accommodation options.

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Seismic performance of moment end-plate connections to CFT column under cyclic loading’

Jan 20, 2013 - Jan 21, 2013

Publisher Trans Tech Publications Ltd

DOI doi:10.4028/www.scientific.net/AMR.680.205

Country Australia

Location Melbourne, Australia

AN ANALYTICAL MODELFOR THE ANALYSIS OF STEEL BEAM-COLUMN CONNECTIONS UNDER CYCLIC LOADING

Dec 1, 2011 - Dec 3, 2011

Publisher Coimbatore india

Country India

Location Coimbatore