Mechanical properties analysis of steel– concrete–steel composite beam

2015 ◽  
Vol 19 (5) ◽  
pp. 525-543 ◽  
Author(s):  
Guang P Zou ◽  
Pei X Xia ◽  
Xin H Shen ◽  
Peng Wang
Keyword(s):  
Mechanical Properties ◽  
Theoretical Analysis ◽  
Sectional Curvature ◽  
Axial Force ◽  
Composite Beam ◽  
Composite Beams ◽  
Interfacial Slip ◽  
Concentrated Load ◽  
Steel Composite ◽  
Interface Slip

The interface slip will appear between the steel plates and concrete while the steel–concrete–steel composite beam under loading. It may influence the mechanical properties of the composite beam. In this paper, through theoretical analysis of the steel–concrete–steel composite beam, differential equation of interface slip is established at first. By simulating the real boundary, the formulas of interface slip are calculated under uniform and arbitrary concentrated load. Then, the axial force, the sectional curvature, and deformation of composite beams are obtained. In order to validate the reliability of the theoretical analysis, the deformation of 18 samples is calculated by using the deformation formulas of steel–concrete–steel composite beam. The results are in good agreement with the experimental consequences. Through an example, the mechanical properties of composite beams (axial force, sectional curvature, and deformation) are analyzed under interfacial slip. With the decreasing of interfacial slip, axial force of upper plate increases, and sectional curvature and deflection decrease. For lower steel plate, the interfacial slip has smaller effect.

Experimental Research on Steel-High Strength Concrete Composite Beams

2011 ◽  
Vol 255-260 ◽  
pp. 664-668
Author(s):  
Wei Xu ◽  
Feng Xu ◽  
Hao Wang ◽  
Lian Guang Wang
Keyword(s):  
Mechanical Properties ◽  
High Strength Concrete ◽  
Composite Beam ◽  
Test Specimen ◽  
High Strength ◽  
Composite Beams ◽  
Test Results ◽  
Strength Concrete ◽  
Deformation Properties ◽  
Interface Slip

Based on 5 test specimen of steel-high strength concrete composite beam, This paper analyzes test results, researches on mechanical properties of steel-high strength concrete composite beams, load-deformation properties, performance of the interface slip and strain of the midspan across-section of beams, Study on the performance of the steel-high strength concrete composite beams.

scholarly journals Investigation of the Mechanical Behavior of Partially Precast Partially Encased Assembled Composite Beams

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Liufeng Zhang ◽  
Yinghua Yang
Keyword(s):  
Mechanical Properties ◽  
Composite Beam ◽  
Low Cost ◽  
Concrete Strength ◽  
Composite Beams ◽  
Test Results ◽  
Structural Form ◽  
Heavy Load ◽  
Grade Steel ◽  
Good Agreement

In view of the characteristics of a high floor and the heavy load of logistics buildings, a partially prefabricated partially encased assembled composite beam (PPEC) is proposed in order to achieve the low cost construction of such buildings. In this research, the mechanical properties of PPEC beams were studied experimentally. The effects of the concrete strength grade, steel content, shear span ratio, and fabrication methods on the mechanical properties of the PPEC beams were analyzed. The results showed that the proposed structural form of the PPEC beams was generally feasible. Based on the test results, a practical shear formula for PPEC beams was proposed, and the calculated results were in good agreement with the test results.

Theoretical Analysis and Model Experimental Research on Single-Layer Hyperbolic Paraboloid Latticed Shell

2011 ◽  
Vol 105-107 ◽  
pp. 892-896
Author(s):  
Peng Deng ◽  
Lai Wang ◽  
Na Han
Keyword(s):  
Mechanical Properties ◽  
Theoretical Analysis ◽  
Experimental Research ◽  
Axial Force ◽  
Single Layer ◽  
Structure Design ◽  
Scale Model ◽  
Local Instability ◽  
Hyperbolic Paraboloid ◽  
Design Load

Single-layer hyperbolic paraboloidal latticed shell dome is adopted in the gymnasium of China University of Petroleum. And the center part of the dome employs crossed web bars in order to increase stiffness of the structure. The 1:12 scale model has been made according to the construction drawings, and the mechanical properties of the model are studied under self-weight load and design load. The regularity of the members' axial force and joints' displacements are obtained. And the results show that the deflection of dome under design load conforms to the requirement of specifications, which verified the correctness of the structure design. It is found that there is no overall instability and local instability, and the behavior of the structure is almost linear.

Three Dimensional Simulation of Steel-Concrete Composite Beams with an Interface-Slip Model

2010 ◽  
Vol 163-167 ◽  
pp. 1520-1524
Author(s):  
Shi Qin He ◽  
Peng Fei Li ◽  
Feng Shang
Keyword(s):  
Composite Beam ◽  
Three Dimensional ◽  
Composite Beams ◽  
Concrete Slabs ◽  
Slip Model ◽  
Interfacial Behavior ◽  
Steel Girders ◽  
Reinforcing Bar ◽  
Beam Experiment ◽  
Interface Slip

This paper presents a three-dimensional finite element (FE) anaytical approach for the simulation of steel-concrete composite beams. To simulate key problem, the interfacial behavior between the steel girders and concrete slabs, an interface-slip model is applied in the analysis. Both simple-supported beam experiment and continuous composite beam experiment are simulated. The load-deflection relation and the slip between the steel girders and concrete slabs as well as the strain of the steel girder and reinforcing bar in concrete are obtained from the FE analyses, and found to match well with the corresponding experimental results. The proposed nonlinear FE analysis method is capable of simulating the mechanical behaviors of steel-concrete composite beam.

A General Load-Slip Interfacial Model for FRP-Concrete Composite Beams

2014 ◽  
Vol 501-504 ◽  
pp. 758-765 ◽  
Author(s):  
Xing Xing Zou ◽  
Jing Quan Wang
Keyword(s):  
Composite Beam ◽  
Shear Force ◽  
Shear Stiffness ◽  
Composite Beams ◽  
Interfacial Shear ◽  
Interfacial Slip ◽  
New Model ◽  
Testing Data ◽  
Load Increase ◽  
Shear Slip

The present study investigated the effects of shear slip on the deformation and strength of FRP-concrete composite beams. The load-slip curves were found consisting of two phrases: load kept increasing without any interfacial slip in the former phrase and load went up linearly versus interfacial slip in the latter phrase. A bilinear interfacial model was therefore proposed to describe the function between interfacial shear force and slip in FRP-Concrete composite beams. Two dominant parameters in the model, initial bond stress (vs) and shear stiffness of the interface (k), were defined according to the testing data. Initial bond force is the shear force when slip occurs; shear stiffness is the ratio of load increase versus interfacial slip. This new model can be applied to predict the stiffness and analysis stress of the composite beam considering the effect of slip.

Nonlinear Analysis of Prestressed Cold-Formed U-Shaped Steel and Concrete Composite Beams

2012 ◽  
Vol 594-597 ◽  
pp. 749-752
Author(s):  
Jian Jun Yu ◽  
Lian Guang Wang
Keyword(s):  
Theoretical Analysis ◽  
Bearing Capacity ◽  
Nonlinear Analysis ◽  
Experimental Research ◽  
Composite Beam ◽  
Steel Plate ◽  
Flexural Rigidity ◽  
Concrete Strength ◽  
Composite Beams ◽  
Analysis Mode

Cold-formed U-shaped steel and concrete composite beam is a kind of composite beam which the steel and the concrete are integrated by welding connections on the cold-formed U-shaped steel and then pouring concrete on the steel. Now, many experts and scholars have carried out many experimental research and theoretical analysis about it. But, prestressed Cold-formed U-shaped steel and concrete composite beams have not been studied. Based on the structure , the nonlinear analysis mode of prestressed cold-formed U-shaped steel and concrete composite beams is proposed, the calculating program is researched. The calculating results show that the bearing capacity of composite beam increases with the increments of thickness of steel plate and concrete strength, and the thickness of steel plate has a larger effect than the width of the flange plate of concrete, applying prestress can enhance the bearing capacity and flexural rigidity of the composite beam.

Research on Reinforcing Methods of Continuous Steel-Concrete Composite Beams with Web Openings

2014 ◽  
Vol 919-921 ◽  
pp. 1952-1957
Author(s):  
Long Qi Li ◽  
Dong Hua Zhou ◽  
Wen Yuan Liao
Keyword(s):  
Mechanical Properties ◽  
Composite Beam ◽  
Local Stability ◽  
Composite Beams ◽  
Shear Capacity ◽  
Vertical Shear ◽  
Engineering Practice ◽  
Web Openings ◽  
Web Opening ◽  
Moment Functions

By considering the four secondary moment functions ,which are developed according to virtual plastic stress distribution at the perforated section of continuous composite beam. reinforced opening proved to be necessary and reliable .Several reinforcing methods are reserched. mechanical properties are compared with FE results in different reinforced continuous composite beam.The result indicates that the bending and vertical shear capacity of continuous composite beam with web opening can be effectively enhanced to a certain extent. In addition,stiffness and local stability at web opening area are also increase. Effective reinforcing method is presented and can be used in engineering practice.

scholarly journals The Assessment of the Slip Influence on the Deflection of the Steel Plate-Concrete Composite Beams

2016 ◽  
Vol 62 (2) ◽  
pp. 59-76 ◽  
Author(s):  
D. Kisała ◽  
K. Furtak
Keyword(s):  
Theoretical Analysis ◽  
Steel Plate ◽  
Experimental Studies ◽  
Composite Beams ◽  
Design Concept ◽  
New Type ◽  
Interface Slip

Abstract The aim of this paper is to present an assessment of the slip influence on the deflection of the steel plate-concrete composite beams, which are a new type of a design concept. The proposed method is based on the procedure included in the PN-EN 1992-1-1, which has been modified with taking into consideration interface slip. The theoretical analysis was verified by experimental studies.

scholarly journals Flexural Behaviour of a Cold-Formed Steel-Concrete Composite Beam with Channel Type Shear Connector – An Experimental and Analytical Study

2019 ◽  
Vol 29 (3) ◽  
pp. 228-240 ◽  
Author(s):  
Sangeetha Palanivelu
Keyword(s):  
Carrying Capacity ◽  
Composite Beam ◽  
Composite Structures ◽  
Composite Beams ◽  
Load Carrying Capacity ◽  
Shear Connectors ◽  
Finite Element Software ◽  
Load Carrying ◽  
Steel Composite ◽  
Cold Formed Steel

Abstract Steel-concrete composite structures are widely used in the current construction of bridges and multi-storey buildings. The effect of shear connectors in a cold-formed steel-composite beam was studied under flexure. The number of channel connectors in the specimen was varied and the same was compared with a specimen without shear connectors. The performance and failure of cold-formed steel-composite beams were then studied. The presence of shear connectors in the tension zone prevents the formation of cracks which are the major cause of failure in a beam subjected to bending. The load-carrying capacity is greater in a composite beam and an increase in the number of channel connectors from one to five increases the load-carrying capacity by 60 % as compared to a specimen without a connector. A composite beam with five connectors is more ductile, with a ductility factor of 14. The Composite beams were also analysed using the finite element software ANSYS and were found to have good agreement with the experimental results.

Effects of dowels on the mechanical properties of wooden composite beams in ancient timber structures

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 6891-6909
Author(s):  
Xiaoli Han ◽  
Jian Dai ◽  
Wei Qian ◽  
Zhaoyang Zhu ◽  
Baolong Li
Keyword(s):  
Mechanical Properties ◽  
Composite Beam ◽  
Bending Moment ◽  
Composite Beams ◽  
Timber Structures ◽  
Test Results ◽  
Mechanical Behaviors ◽  
Bending Capacity ◽  
Loading Tests ◽  
Failure Conditions

In order to provide more accurate suggestions for the restoration of ancient timber buildings, five types of specimens were designed for static loading tests. The tree species used for the specimens was larch. The wooden composite beams were composed of purlins, tie plates, and fangs. The study analyzed the effects of the number and position of dowels on the mechanical behaviors of wooden composite beams in ancient timber buildings. The bending moment, slippage, strain of the wooden composite beams under the deflection of the beam allowed according to code, and the ultimate bearing capacity of the wooden column composite beams under failure conditions were examined. The test results showed that the dowels could improve the bending capacity of the wooden composite beams. The even distribution of the dowels was beneficial in reducing the sliding effect of the wooden composite beams. Under the amount of deflection allowed by the code, the mid-span section strain along the height of the wooden composite beam approximately conformed to the plane section assumption. The wooden composite beam still had bending capacity after each member failed. The results of this study illustrated that dowels improved the overall mechanical properties of the wooden composite beams.

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