Properties Of Composite Beams Research Articles

Study on the flexural and ductility behaviour of plate reinforced concrete beam-A review

A comprehensive literature review on the basis of the flexural and ductility behaviour of the plate reinforced concrete beams are presented in this paper. The objective of this paper is to provide a review of the development and current progress in the flexural and ductile behaviour of plate-reinforced concrete beams. The composite beams are composed of plain concrete beams strengthened by steel plates, externally bonded to their tension faces. The effects of four parameters; namely, plate thickness, beam size, concrete strength, and adhesive type on the moment capacity, deflection, and failure mode of composite beams are studied. This paper also highlights the use of plate thickness and beam size, which has a significant impact on the flexural strength, stiffness, and failure mode of composite beams. Furthermore, this literature study also identifies areas, where further research is needed, such as, the effect of the adhesive type and concrete grade on the properties of composite beams.

Effects of corrugation on the stiffness properties of composite beams for structural applications

Effects of corrugation on the stiffness properties of composite beams for structural applications

Effects of corrugation on the stiffness properties of composite beams for structural applications

The primary goal of this research was to investigate the stiffness characteristics of trapezoidal corrugated composite laminates under tensile and flexural load. Stiffness was calculated experimentally, analytically, and numerically in two directions. The longitudinal direction was defined as perpendicular to the corrugations and transverse direction along the corrugations. The stiffness ratio is the ratio of longitudinal stiffness to transverse stiffness. The effects of corrugations were measured by comparing changes to the stiffness ratios of flat and corrugated composite beams in tension and bending. For corrugated fibreglass coupons, the extensional stiffness ratio was increased from 1.0 to 49 and the flexural stiffness ratio was increased from 0.3 to 187. For carbon fibre coupons, the extensional stiffness ratio increased from 0.7 to 61.3 and the flexural stiffness ratio increased from 0.3 to 81.4. Corrugation of composite beams has shown a significant increase in stiffness for tensile and bending applications.

Nonlinear Simulation Analysis on Steel Concrete Composite Beam with Rubber Aggregate

In order to investigate mechanics performance of rubber concrete steel composite beam, nonlinear analysis on four steel concrete composite beams with different amount of rubber has been carried out using finite element analysis software, and the influence of rubber concrete to mechanical properties of composite beam was explored. The results show that ductility, crack resistance of rubber concrete slab, shear capacity of shear connector for rubber concrete steel composite beam are improved significantly compared with ordinary steel concrete composite beams. Along with the increase of rubber content, the energy consumption of composite beams gradually increases, while the ultimate bearing capacity decreases with small amplitude. As a kind of green environmental protection material Rubber Aggregate concrete has the characteristics of good ductility, crack resistance is strong, energy consumption is obvious and good wear resistance.

An Investigation on Engineering Properties of Composite Beam

There is several agriculture waste materials have continuously been producing. The oil palm shell has been used to produce Oil Palm Shell Concrete (OPSC). And by use of 1% Kenaf-Oil Palm Shell mixture, a natural composite concrete (OPS-kenaf concrete) has been made. The time to failure, stroke and flexural strength of concrete beams have been studied. The concrete cubes have also been tested to identify time to failure and compressive strength of proposed concretes. The results have been indicated that 1% kenaf-OPS mixture enhances flexural strength of beam. And also the stroke and time to failure have not considerably been changed. The significant effect has not been observed on morphology of crack. The compressive strength of (OPS-1% kenaf mixture) has been improved. This new proposed composite concrete beam has acceptable effect on minimizing environment pollution.

Study on Web Parameters of Prestressed Concrete Composite Box Girder with Corrugated Steel Web

Taken the Chongqing PC composite box girder with corrugated steel web for background , spatial finite element calculation model is set up by adopting the mixed unit, the influence about geometric parameters of corrugated steel perforation is analyzed by used linear and nonlinear finite element calculation of steel box girder .It shows that bending stress and warping stress was reduced by increasing the bending angle of corrugated steel webs of composite beams, while the buckling strength improved obviously; the ratio of the top slab and the floor slab maximum thickness of box girder to the corrugated steel perforation should be about 20; the mechanical properties of composite beams will be improved by reducing the length of straight slabs of corrugated steel webs.

Damping Performance of Cocured Composite I-Shaped Beams with Embedded Viscoelastic Layers

Composite I-shaped beams are currently used in aerospace, ocean and civil engineering applications. Increasing the vibration damping of composite structures is a concerned need in those applications. This research is an effort to investigate the damping performance of composite I-shaped beams with cocured viscoelastic damping layers using finite element method and modal testing technique. A hybrid finite element model for a damped composite I-shaped beam was developed. Modal strain energy method was used to estimate the linear viscoelastic modal loss factors of the composite beams. A numerical parametric investigation was conducted to study the effects of various parameters on the dynamic properties of composite beams under free-free end boundary condition. Selective design parameters included inserting location and thickness of damping layers. Natural frequency and modal loss factor were also extracted by experimental modal analysis. Static tests were performed to obtain the loss of static stiffness for inserting soft viscoelastic layers. Experimental and analytical results show the inserting location of cocured damping layers has significant effects on the damping and there exists a critical damping layer thickness for optimal damping with less significant modal frequency decrease. Static tests results demonstrate a little loss of static stiffness for embedding low module damping layers. A careful selection of damping layer location and thickness is needed to optimize the damping benefits desirable and the mechanics stiffness reduction that can be tolerated for intergral damping composite structures.

EXPERIMENTAL AND NUMERICAL ANALYSIS OF FLEXURAL COMPOSITE BEAMS WITH PARTIAL USE OF HIGH STRENGTH/HIGH PERFORMANCE CONCRETE

The paper summarises the experimental and numerical analysis of flexural capacity and deformability of structural concrete beams prepared as composite members consisting of two concrete layers made of reinforced normal concrete and high‐performance concrete (HPC). The reinforced concrete composite beams used in the tests were prepared in full scale with the cross‐section of 120 × 200 mm and the effective span of 2950 mm. The basic samples were composed in two layers consisting of high‐performance concrete as the top layer, and normal strength concrete. The results of the analyses confirm a significant improvement of structural properties of composite beams in comparison to the beams prepared totally of normal concrete, and in some cases also in comparison with the beam totally made of HPC.

Energy absorption properties of composite beams with I shape Hiroyuki Hamada (Faculty of Tectile Science, Kyoto Institute of Technology), Tamotsu Nakatani (Graduate School, Kyoto Institute of Technology)

Energy absorption properties of composite beams with I shape Hiroyuki Hamada (Faculty of Tectile Science, Kyoto Institute of Technology), Tamotsu Nakatani (Graduate School, Kyoto Institute of Technology)