Investigation on interfacial anti-sliding behavior of high strength steel-UHPC composite beams

He, Shaohua; Xu, Yangming; Zhong, Huaqian; Mosallam, Ayman; Zhou, C.

doi:10.1016/j.compstruct.2023.117036

Cited by 8 publications

(8 citation statements)

References 20 publications

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“…Ultra-high performance concrete (UHPC) is a new cement-based composite material with super-high strength, high toughness, and remarkable durability [23]. The tensile strength of UHPC is very high and reaches up to 5 to 10 times that of traditional concrete.…”

Section: Employing Uhpc Overlaymentioning

confidence: 99%

“…Various approaches have been proposed to strengthen the concrete decks at the negative bending moment region [15][16][17][18][19]. However, existing approaches mostly concentrate on the single crack-controlling technique, which cannot completely solve the cracking problem of the continuous composite girder bridge exposed to severe load conditions and harsh environments [20][21][22][23]. The easy cracking of the hogging moment zone has seriously prevented the further application of continuous steel-concrete girder bridges.…”

Section: Introductionmentioning

confidence: 99%

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Cracking control technique for continuous steel-concrete composite girders under negative bending moment

2023

Archives of Civil Engineering

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Continuous steel-concrete composite girder can fully utilize material strength and possess large spanning ability for bridge constructions. However, the weak cracking resistance at the negative bending moment region of the girder seriously harms its durability and serviceability. This paper investigates practical techniques to improve the cracking performance of continuous steel-concrete composite girders subjected to hogging moment. A real continuous girder was selected as the background bridge and introduced for numerical analysis. Modeling results show that under the serviceability limit state, the principle stress of concrete slabs near the middle piers of the bridge was far beyond the allowable material strength, producing a maximum tensile stress of 10.0 MPa. Approaches for strengthening concrete decks at the negative moment region were developed and the effectiveness of each approach was assessed by examing the tensile stress in the slabs. Results indicate that the temporary counterweight approach decreased the maximum tensile stress in concrete slabs by 22%. Due to concrete shrinkage and creep, more than 65% of the prestressed compressive stresses in concrete slabs were finally dispersed to the steel beams. A thin ultra-high performance concrete (UHPC) overlay at the hogging moment region effectively increased the cracking resistance of the slabs, and practical engineering results convicted the applicability of the UHPC technique.

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Section: Employing Uhpc Overlaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cracking control technique for continuous steel-concrete composite girders under negative bending moment

2023

Archives of Civil Engineering

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“…The impact of connector numbers and positions on the effective width of a composite beam flange has not yet been fully explored [8][9][10]. The effective width of a flange is the width of a hypothetical flange that compresses uniformly across its width, similar to the loaded edge of a real flange under the same edge shear forces.…”

Section: Introductionmentioning

confidence: 99%

The Concrete Effective Width of a Composite I Girder with Numerous Contact Points as Shear Connectors

Hasan,

Subh,

Wardeh

2024

Applied Mechanics

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Due to the shear strain in the plane of the slab, the parts of the slab remote from the steel beam lag behind the part of the slab located in its proximity. This shear lag effect causes a non-uniform stress distribution across the width of the slab. As a result, several standards have introduced the concept of an effective flange width to simplify the analysis of stress distribution across the width of composite beams. Both the computed ultimate moment and serviceability limit states are directly impacted by the effective width. The effect of using a large number of contact points as shear connectors on the effective width of a steel beam flange has not been investigated. A three-dimensional finite element analysis is carried out in this paper. The ABAQUS software (version 6.14) is used for this purpose, where several variables are considered, including the surface area connecting the steel beam and concrete slab, the transverse space, and the number of shear connectors. It was discovered that the number of shear connectors on the steel beam flange has a major impact on the effective width. The many connectors work together to provide a shear surface that improves the effective width by lowering the value of the shear lag.

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“…Fang et al [20] investigated a UHPC-steel composite beam using short stud connectors. Q460 high-strength steel and a UHPC composite beam bonded by an open-hole steel plate were investigated by He et al [21]. Push-out tests and flexural bending tests were carried out.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of High-Strength Steel and Ultra-High-Performance Fiber-Reinforced Concrete Composite Beams

Xia

2024

Buildings

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The flexural performance of steel and concrete composite beams can be further enhanced by utilizing advanced construction materials such as ultra-high performance fiber-reinforced concrete (UHPFRC) and high-strength steel. In this paper, the concept of critical elastic moment resistance is proposed and the equation for its estimation is derived. It was found that the high yield strength of steel calls for a narrow UHPFRC top layer to reach the critical state, whereas this ideal condition is not realistic for composite beams with normal-strength steel and UHPFRC. Small-scale composite beams composed of both high-strength and low-strength steel materials were tested under four-point bending to verify the critical state and performance of different types of connectors. The headed studs and plate connectors were first tested through small-scale push-out tests and then implemented in the composite beam with different spacing. The connection utilizing headed studs with 150 mm spacing performed the best among the three tested specimens in helping reach the critical elastic moment resistance. Finite element analyses of the composite beam were performed based on the estimated material properties under axial and biaxial stress conditions and the results align with the experiment results.

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Investigation on interfacial anti-sliding behavior of high strength steel-UHPC composite beams

Cited by 8 publications

References 20 publications

Cracking control technique for continuous steel-concrete composite girders under negative bending moment

Cracking control technique for continuous steel-concrete composite girders under negative bending moment

The Concrete Effective Width of a Composite I Girder with Numerous Contact Points as Shear Connectors

Flexural Behavior of High-Strength Steel and Ultra-High-Performance Fiber-Reinforced Concrete Composite Beams

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