scholarly journals SIMULAÇÃO NÚMERICA DO COMPORTAMENTO DE VIGAS MISTAS DE AÇO E CONCRETO PROTENDIDAS [ Numerical behavior analysis of prestressed steel-concrete composite beams ]

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Elder Nogueira Da Silva ◽  
Alex Sander Clemente De Souza
Keyword(s):  
Finite Element ◽  
Numerical Model ◽  
Finite Elements ◽  
Composite Beam ◽  
Concrete Slab ◽  
Constitutive Relations ◽  
Composite Beams ◽  
Experimental Results ◽  
Finite Element Models ◽  
Shear Connectors

RESUMO: O presente trabalho apresenta uma metodologia para análise numérica de vigas mistas de aço e concreto protendidas utilizando o pacote computacional ABAQUS®, que permite modelagens via método dos elementos finitos. A metodologia aborda aspectos relacionados a escolha dos elementos finitos utilizados, geometria das malhas, relações constitutivas dos materiais, condições de acoplamento e vinculação entre os materiais e procedimentos de aplicação dos carregamentos, com o objetivo de simular o comportamento da estrutura. A interação entre laje de concreto e viga de aço foi modelada com conectores e elementos de contato e considerando somente o acoplamento das redes de elementos finitos da laje e da viga. A validação do modelo numérico foi realizada através da correlação entre os resultados numéricos e experimentais disponíveis na literatura. Para ambas as formas de vinculação laje-perfil, o modelo numérico representou de forma satisfatória o comportamento observado experimentalmente. Nos casos em que foram modelados os conectores de cisalhamento as vigas apresentaram menor rigidez e consequentemente melhor correlação entre resultados numéricos e experimentais.ABSTRACT: This paper reports a methodology adopted to represent the behavior of prestressed steel concrete composite beam by finite element models using software ABAQUS®. The methodology presents aspects related to the choice of finite elements types, mesh geometry, constitutive relations of materials, boundary conditions, steel-concrete interaction and sequence of loading.  The interaction between the concrete slab and the steel profile was carried out modeling the shear connectors, using contact elements to modeling the interface and after was carried out using TIE constraint. The validation of the numerical model was carried through the correlation between the numerical and experimental results and it was adequate to simulate the experimentally tested beams for both forms of slab profile bonding, especially for the cases where the shear connectors were modeled, because the beams presented lower stiffness and consequently greater proximity of the experimental results.

scholarly journals Study on Behaviour of Stud Type Shear Connector in Composite Beam Using ANSYS

2018 ◽  
Vol 7 (3.10) ◽  
pp. 54
Author(s):  
T Subramani ◽  
A Periasamy
Keyword(s):  
Composite Beam ◽  
Composite Structures ◽  
Numerical Models ◽  
Concrete Slab ◽  
Composite Beams ◽  
Vital Role ◽  
Shear Connector ◽  
Structural Behaviour ◽  
Shear Connectors ◽  
High Rise

Composite plays a vital role in replacing the existing mild steel in reinforcement and exterior truss structure. This study proposed to design shear connector for joining concrete slab and steel section. Shear connectors has analyzed and predict the best connector for a particular composite beam with respect to static load and the amount of steel in the connector as a common aspect. The use of composite structures is increasingly present in civil construction works nowadays. Composite beams, especially, are structures which include substances, a metal phase placed in particular inside the tension region and a concrete phase, positioned in the compression go sectional location, both are related with the aid of steel gadgets called shear connectors. The main features of this connector are to permit the weight for the joint the beam-column, to restriction longitudinal slipping and uplifting on the factors interface the shear forces. Our project paper presents 3D numerical models of steel-concrete composite beams to simulate their structural behaviour, with emphasis on the beam column interface using Simulations software ANSYS 18.1 based on the Finite Element Method. Mostly these type of structures are widely used in the dynamic loading structures like bridges and high rise buildings.  

scholarly journals Numerical simulation of steel-concrete composite beams: updated strategies of finite element modeling

2020 ◽  
Vol 13 (5) ◽  
Author(s):  
Matheus Erpen Benincá ◽  
Rebeca Jéssica Schmitz ◽  
Inácio Benvegnu Morsch
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Numerical Modeling ◽  
Numerical Model ◽  
Finite Element Modeling ◽  
Composite Beams ◽  
Experimental Results ◽  
Ansys Software ◽  
Material Models ◽  
Current Technology

abstract: The use of steel-concrete composite beams allows the best properties of these materials to be explored, resulting in more economical solutions. Many researchers have studied the behavior of composite beams from different strategies of numerical modeling, and some of these are presented in this article. In this context, the present work proposes the construction of a tridimensional numerical model using ANSYS software, version 19.2, with current-technology elements and compatible material models. For the simulation of concrete behavior, two models have been used: the first, denominated DP-CONCRETE, is a native ANSYS model, available in the more recent versions of this software; and the second, denominated USERMAT, is a customizable model that was developed based on Ottosen criterion. The results obtained with these models for the analyzed beams presented a good correlation with the experimental results and with numerical results from previous works.

scholarly journals Effect of Shear Connector Layout on the Behavior of Steel-Concrete Composite Beams with Interface Slip

2019 ◽  
Vol 9 (1) ◽  
pp. 207 ◽  
Author(s):  
Xinggui Zeng ◽  
Shao-Fei Jiang ◽  
Donghua Zhou
Keyword(s):  
Composite Beam ◽  
Concrete Slab ◽  
Composite Beams ◽  
Triangular Distribution ◽  
Shear Connector ◽  
Optimal Method ◽  
Shear Connectors ◽  
Appreciable Increase ◽  
Partial Interaction ◽  
Distribution Type

In a steel-concrete composite beam (hereafter referred to as a composite beam), partial interaction between the concrete slab and the steel beam results in an appreciable increase in the beam deflections relative to full interaction behavior. Moreover, the distribution type of the shear connectors has a great impact on the degree of the composite action between the two components of the beam. To reveal the effect of shear connector layout in the performance of composite beams, on the basis of a developed one-dimensional composite beam element validated by the closed-form precision solutions and experimental results, this paper optimizes the layout of shear connectors in composite beams with partial interaction by adopting a stepwise uniform distribution of shear connectors to approximate the triangular distribution of the shear connector density without increasing the total number of shear connectors. Based on a comparison of all the different types of stepped rectangles distribution, this paper finally suggests the 3-stepped rectangles distribution of shear connectors as a reasonable and applicable optimal method.

Finite Element Modelling of Innovative Precast Cold-Formed Steel Ferrocement as Composite Beam

2015 ◽  
Vol 752-753 ◽  
pp. 539-543 ◽  
Author(s):  
Anis Saggaff ◽  
Talal Alhajri ◽  
M. Ismail ◽  
Khaled Alenezi ◽  
Mohamad Ragae
Keyword(s):  
Finite Element ◽  
Composite Beam ◽  
Finite Element Modelling ◽  
Close Agreement ◽  
Concrete Slab ◽  
Experimental Tests ◽  
Composite Beams ◽  
Element Modelling ◽  
Cold Formed Steel ◽  
Steel Section

This paper describes Finite Element Modeling (FEM) of a composite beam comprised of cold formed steel section and concrete slab designed as ferrocement. Software (ANSYS, version 11) was adopted to carry out the modeling of the proposed composite beam. Experimental tests were also been carried out for three simple supported composite beams. The proposed innovative precast composite beam specimens of cold-formed steel lipped channel sections (CFS) connected with ferrocement slab were tested till failure, under two point loads positioned atquarter length of the span from support. The results showed that close agreement was observed between the FEM and experimental results for ultimate loads and load-deflection responses.

scholarly journals Structural Behavior of Steel-Concrete Composite Beam using Bolted Shear Connectors: A Review

2018 ◽  
Vol 203 ◽  
pp. 06010
Author(s):  
Nadiah Loqman ◽  
Nor Azizi Safiee ◽  
Nabilah Abu Bakar ◽  
Noor Azline Mohd Nasir
Keyword(s):  
Composite Beam ◽  
Concrete Slab ◽  
Precast Concrete ◽  
Composite Beams ◽  
Reinforced Concrete Beams ◽  
Structural Behavior ◽  
Concrete Slabs ◽  
Steel Beam ◽  
Shear Connectors ◽  
Beam System

Conventional steel-concrete composite beams have been recognized to exhibit stronger structural characteristics, in terms of strength and stiffness, when compared to pure steel or reinforced concrete beams. However, currently most steel beam is fully attached to the concrete slab; this means that the shear connectors are welded through the steel decking on to the steel beam and cast into concrete slab to fulfill the necessary shear connection. Recently, the deconstruction and reuse of the components almost impossible. In order to achieve a sustainable structural system, precast concrete slabs are attached to a steel beam using bolted shear connectors in prefabricated holes have been introduced as an alternative to the conventional connectors in steel – concrete composite beam system. This paper reviews the structural behavior of composite beam system such as the strength, stiffness, slip behavior, failure mode and sustainability obtained by experiment and numerical studies in order to address the applicability and efficiency of the composite beams having precast concrete slabs and bolted shear connectors.

scholarly journals Finite Element Analysis on Shear Behavior of High-Strength Bolted Connectors under Inverse Push-Off Loading

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 479
Author(s):  
Wei Wang ◽  
Xie-dong Zhang ◽  
Fa-xing Ding ◽  
Xi-long Zhou
Keyword(s):  
Finite Element ◽  
Concrete Slab ◽  
Concrete Strength ◽  
Three Dimensional ◽  
High Strength ◽  
Element Model ◽  
Composite Beams ◽  
Element Analysis ◽  
Shear Connectors ◽  
Parametric Analyses

High-strength bolted shear connectors (HSBSCs), which can be demounted easily and efficiently during deconstruction, are recommended to replace the conventional steel studs in steel–concrete composite beams (SCCBs) to meet the requirements of sustainable development. The existing investigations on the behavior of HSBSCs mainly focus on the positive moment area of composite beams, in which the concrete slab is in compress condition. In this paper, a three-dimensional finite element model (FEM) was developed to investigate the performance of HSBSCs subjected to inverse push-off loading. Material nonlinearities and the interactions among all components were included in the FEM. The accuracy and reliability of the proposed FEM were initially validated against the available push-off test results. Load-carrying capacity and load–slip response of the HSBSCs under inverse push-off loading were further studied by the verified FEM. A parametric study was carried out to determine the influence of the concrete strength, the diameter and tensile strength of bolt and the clearance between the concrete slab and the bolt as well as the bolt pretension on the shear performance of HSBSCs. Based on the extensive parametric analyses, design recommendations for estimating the shear load at the first slip and load-bearing resistance of HSBSCs were proposed and verified.

Towards Light-Weight Composite Construction: Innovative Shear Connector for Composite Beams

2013 ◽  
Vol 351-352 ◽  
pp. 427-433 ◽  
Author(s):  
S.O. Bamaga ◽  
M.Md. Tahir
Keyword(s):  
Composite Beam ◽  
Concrete Slab ◽  
Low Cost ◽  
Construction Materials ◽  
Composite Beams ◽  
Shear Connectors ◽  
Steel Sections ◽  
Speed Up ◽  
Cold Formed Steel ◽  
Steel Section

Introducing low cost housing is one of the challenges face civil engineers now-days. Using lightweight construction materials i.e. cold formed steel sections is an alternate solution to overcome the challenge. In this study, a lightweight composite beam was introduced. It consists of cold formed steel section and profiled concrete slab. Experimental push tests were conducted to investigate the ductility and strength capacities of new and innovative shear connectors. The shear connectors were easy to form and give advantages to speed up the fabrication process of the proposed composite beam. The shear connectors showed large deformation and strength capacities. It is concluded that the proposed shear connectors could be used for lightweight composite beams.

scholarly journals Minimum degree of shear connection in composite beams in buildings

2018 ◽  
Author(s):  
Eleftherios Aggelopoulos ◽  
Graham Couchman ◽  
Mark Lawson
Keyword(s):  
Finite Element ◽  
Minimum Degree ◽  
Composite Beams ◽  
Building Construction ◽  
Finite Element Models ◽  
Shear Connectors ◽  
Shear Connection ◽  
Steel Strength ◽  
Special Cases ◽  
Limiting Value

Composite floors are often used in building construction where beams typically span from 6 to 18 m. They are commonly used together with decking of 50 to 80 mm depth that spans 3 to 4.5 m between the beams. Rules for the minimum degree of shear connection in composite beams are presented in Eurocode 4 and other international Codes, and were derived for beams in propped construction.Eurocode 4 defines a minimum limit for the degree of shear connection, primarily to ensure that slip at the steel-concrete interface does not exceed a limiting value. This limit is proportionate to the beam span and also depends on the steel strength and the asymmetry of the flange areas of the section. Currently, many designs cannot achieve the codified degree of shear connection demands, since it is not possible to accommodate a sufficient number of shear connectors on the span as dictated by the spacing of the deck ribs. However, there are special cases which are not explicitly accounted for in Codes. This paper aims to investigate the degree of shear connection requirements in such cases, including beams that are unpropped in construction, beams that are not fully utilised in bending because serviceability criteria govern their design and beams that are predominantly loaded by point loads rather than uniform loading.The results from parametric finite element analyses carried out using ANSYS for beams in the span range of 6 to 18 m are presented. The finite element models have been calibrated against composite beam tests. Comparisons are made with the current Eurocode 4 provisions and modifications are proposed where appropriate.

scholarly journals Test and Numerical Model of Curved Steel–Concrete Composite Box Beams under Positive Moments

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2978
Author(s):  
Zhi-Min Liu ◽  
Xue-Jin Huo ◽  
Guang-Ming Wang ◽  
Wen-Yu Ji
Keyword(s):  
Finite Element ◽  
Static Loading ◽  
Composite Beams ◽  
Parameter Analysis ◽  
Outer Side ◽  
Finite Element Models ◽  
Test Results ◽  
Rotational Angle ◽  
Shear Connection ◽  
Box Beams

Compared with straight steel–concrete composite beams, curved composite beams exhibit more complicated mechanical behaviors under combined bending and torsion coupling. There are much fewer experimental studies on curved composite beams than those of straight composite beams. This study aimed to investigate the combined bending and torsion behavior of curved composite beams. This paper presents static loading tests of the full elastoplastic process of three curved composite box beams with various central angles and shear connection degrees. The test results showed that the specimens exhibited notable bending and torsion coupling force characteristics under static loading. The curvature and interface shear connection degree significantly affected the force behavior of the curved composite box beams. The specimens with weak shear connection degrees showed obvious interfacial longitudinal slip and transverse slip. Constraint distortion and torsion behavior caused the strain of the inner side of the structure to be higher than the strain of the outer side. The strain of the steel beam webs was approximately linear. In addition, fine finite element models of three curved composite box beams were established. The correctness and applicability of the finite element models were verified by comparing the test results and numerical calculation results for the load–displacement curve, load–rotational angle curve, load–interface slip curve, and cross-sectional strain distribution. Finite element modeling can be used as a reliable numerical tool for the large-scale parameter analysis of the elastic–plastic mechanical behavior of curved composite box beams.

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