A simplified analysis method for composite beams with interlayer slip

Girhammar, Ulf Arne

doi:10.1016/j.ijmecsci.2009.05.003

Cited by 92 publications

(70 citation statements)

References 20 publications

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“…Several studies [14,15] have adjusted the formulation for the effective flexural stiffness from Eurocode 5 by taking into account the effective length of the analyzed composite member as in the Euler buckling model. The same studies proved that differences between the effective --and complete interaction --Euler buckling coefficients are minimal with a small exception for the pinned-clamped static case.…”

Section: Partial Interactionmentioning

confidence: 99%

“…Many researchers have studied this problem, especially for composite beams made of conventional materials like steel, concrete and timber. Girhammar et al [14][15][16] analyzed the static and dynamic behavior of beam-column elements with interlayer slip and deducted exact and simplified first and second order formulations for the displacement functions and various internal actions for timberconcrete composite beams. Faella et al [17,18] developed an "exact" displacement-based finite element model for steelconcrete composite beams with flexible shear connection and a simplified analytical procedure accounting for concrete slab cracking and the resulting tension stiffening effect, nonlinear connection behavior and the reduction of connection stiffness in hogging bending moment regions.…”

Section: Introductionmentioning

confidence: 99%

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Analytical procedure for the design of PFRP-RC hybrid beams including shear interaction effects

Neagoe

Gil

2015

Composite Structures

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Hybrid beams made of pultruded fiber-reinforced polymer (PFRP) shapes connected to reinforced concrete (RC) slabs are regarded as novel cost-effective and structurally-efficient elements. The current study addresses the need for a robust analytical procedure for the design of such members considering the structural implications of shear interaction effects.The discussed analytical procedure is based on the Timoshenko beam theory and on the elastic interlayer slip model extended from steel-concrete and timber-concrete composite beams, and presents the necessary mathematical tools for evaluating deflections, flexural capacities and stress distributions of hybrid beams. Partial interaction effects are quantified by using a proposed dimensionless parameter that depends mainly on the connection's stiffness. The analytical equations were validated successfully against available experimental data and conclusions indicate that the simplified model for partial interaction is viable and should be used even for specimens with full interlayer shear capacity. KeywordsHybrid beam; pultruded FRP; flexural behavior; analytical model; partial interaction.

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Section: Partial Interactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical procedure for the design of PFRP-RC hybrid beams including shear interaction effects

Neagoe

Gil

2015

Composite Structures

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“…Even in a composite design with full interaction, the interface shear transfer is not completely perfect and stiffness may be reduced to some extent due to flexibility of shear connectors. In this study, effective bending stiffness, EI eff is employed in accordance with the principle suggested by Girhammar (2009). The flexural stiffness for composite section with perfect interaction may be written as:…”

Section: Effective Flexural Stiffnessmentioning

confidence: 99%

Behaviour of Composite Plate Girders With Partial Interaction

Yatim

Shanmugam

Badaruzzaman

2013

Journal of Civil Engineering and Management

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Abstract. This paper is concerned with the behaviour and strength of composite plate girders in which, the interaction between the steel plate girder and concrete slab is partial. Based on curvature compatibility principle, an approximate method is proposed from which, the shear capacity and deflection at any given load may be determined. The tension field action developed in web panels at the post-buckling stage is incorporated in the solutions. From the results obtained by using the proposed method, it is found that the flexural stiffness and failure load drop with decrease in degree of interaction. Comparisons are made between the results obtained through the proposed method and the corresponding ones from finite element analysis. A satisfactory correlation between the results in terms of behaviour and strength establishes the accuracy of the proposed method. Keywords: composite plate girders, partial interaction, ultimate load, flexural behaviour, finite element method.

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“…The glued method transmits force more continuously and is considered a full composite, whereas mechanically connected TSC is considered a partial composite. The applicability of the simplified composite method was proposed, but the study indicates that the effective bending stiffness reflects the influence of the interlayer slip and depends on the stiffness of shear connector [9]. Different timber-steel joint fasteners, such as bolts, screws, nails, or their combinations, can be determined using an analytical model to estimate the load-slip relationship [10], and the yielding load of each connection is usually estimated using yield theory [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Determination of Initial Stiffness of Timber–Steel Composite (TSC) Beams Based on Experiment and Simulation Modeling

Tsai

2018

Sustainability

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Due to improvements in the use of recyclable materials in construction, timber-steel composite (TSC) beams demonstrate high potential for future construction. In this study, a proposed simulation modeling, which was adopted from the simulation modeling of a timber I-shape composite, was applied to estimate the initial stiffness of TSC beams. The strength of each beam could be determined once the initial stiffness was estimated. In addition, a series of experiments were performed to examine the accuracy of the proposed simulation modeling, including the effects of different shapes of steel members, fasteners, and applying and not applying a dowel connection. The results indicated that the simulation modeling could adequately determine strength at a deflection of 1/360 of the span. The ratio of difference between the experimental results and the simulation modeling results was less than 10% if a dowel connection at the web was applied. However, the ratio of difference reached 26% and 24% in the TSC beams without a dowel connection at the web that were fastened with screws and nails at the flange, respectively, revealing the importance of applying a dowel connection at the web. Moreover, the strength of the TSC beams with a dowel connection at the web that were fastened by screws was approximately 15% higher than that of TSC beams without screw fasteners. In conclusion, the proposed simulation modeling can provide designers with a method for estimating the initial stiffness and strength of TSC beams within a deflection of 1/360 of the span, supporting the future application of TSC beams in construction.

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A simplified analysis method for composite beams with interlayer slip

Cited by 92 publications

References 20 publications

Analytical procedure for the design of PFRP-RC hybrid beams including shear interaction effects

Analytical procedure for the design of PFRP-RC hybrid beams including shear interaction effects

Behaviour of Composite Plate Girders With Partial Interaction

Determination of Initial Stiffness of Timber–Steel Composite (TSC) Beams Based on Experiment and Simulation Modeling

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