Experimental study on assembled monolithic steel-concrete composite beam in positive moment

Wang, Yu Hang; Yu, Jie; Liu, Jie Peng; Chen, Y. Frank

doi:10.1016/j.engstruct.2018.11.034

Cited by 28 publications

(3 citation statements)

References 22 publications

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“…2 The influence of friction at the timber-steel interface on the relative slip was negligible. 3 The influence of preload applied on bolts on the relative slip of timber-steel composite beams was negligible. 4 After slip occurred between the interface, both the steel I-beam and the timber board conformed to the plane section assumption, and the curvature of both was the same at the same section.…”

Section: Calculation Of Bolts Relative Slip In Elastic Statementioning

confidence: 99%

“…(1) Constitutive relationship of timber-steel interface According to the new constitutive relation of bolts at the composite beam interface (Figure 5), using the definition of bolt stiffness by Nie [20] and the assumptions 1 , 2 , and 3 , the constitutive relation of the bolt at the intersection interface and the bolt stiffness calculation formula are as follows:…”

Section: Calculation Of Bolts Relative Slip In Elastic Statementioning

confidence: 99%

“…Gu et al conducted a numerical finite element analysis (FEA) to analyze further the influence of bolt distance on the axial compression bearing capacity of the plate. Wang et al [3] conducted a bending test on bolted simply supported steel-concrete beams. The results showed that the flexural capacity and ductility of composite beams increase with the increase in bolt connections.…”

Section: Introductionmentioning

confidence: 99%

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A Study on the Influence of Bolt Arrangement Parameters on the Bending Behavior of Timber–Steel Composite (TSC) Beams

Liu

et al. 2022

Buildings

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The present paper investigates the impact of bolt distance, bolt diameter, and the number of bolt rows on the bending performance of timber–steel composite (TSC) beams. This study aims to facilitate the application of bolt connections in assembled TSC structures. Composite steel I-beams were designed with timber boards connected in the upper section with bolts. Three-point static bending tests were conducted on nine timber–steel composite beams divided into four groups (L1, L2, L3, and L4) with varying bolt arrangements. The destruction mode, ultimate bearing capacity, ductility coefficient, load–midspan deflection curve, and load–midspan strain curve of each specimen were obtained. In addition, the destruction mechanism, the quantitative relationship between the bolt area ratio and interfacial slip, and the ideal bolt area ratio were identified. It was found that when the midspan deflection of the timber–steel composite beam approached the prescribed limit, the main failure mode can be explained as follows: The top surface of the boards of all the specimens had longitudinal local splitting, except L1, which had fewer bolts and no obvious damage. Moreover, due to compression and because the stress at the lower edge of the I-beam entered the flow amplitude stage, some of the specimens were crushed but were not pulled off. The composite beams had high flexural load capacity and ductility coefficient, and the maximum relative slips of the timber–steel interfaces were in the range of 2–6 mm. It was also found that the maximum slip of the interface and the ductility coefficient decreased steadily as the bolt area ratio increased, while the specimen’s flexural bearing capacity increased. The optimal bolt area ratio was determined to be 8 × 10−3. Using the total bolt area, we designed the arrangement of the bolts on the board. For convenience, multiple bolt variables were converted into one bolt variable. The longitudinal distance of the bolts had a greater impact on the slip, and the bolt diameter had a smaller impact. The theoretical values of total relative slip were found to be in good agreement with the experimental results, which were based on the superposition of the relative slip equations with varying bolt distances. The effective bolt area ratio and the formula of the relative slip of each segment can provide instructions for the arrangement of bolts and the control of the relative slip of intersections in engineering practices.

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Section: Calculation Of Bolts Relative Slip In Elastic Statementioning

confidence: 99%

Section: Calculation Of Bolts Relative Slip In Elastic Statementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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