Behavior of Perforated Shear Connectors in Steel–Concrete Composite Joints of Hybrid Bridges

Xiao, Lin; Li, Xiaozhen; John, Zhongguo

doi:10.1061/(asce)be.1943-5592.0001020

Cited by 25 publications

(12 citation statements)

References 14 publications

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“…With increasing loading cycles, the cracks ran through and developed densely at the pull sides. Moreover, the number of vertical cracks formed on the side surface was considerably lower than that formed during monotonic static tests (Su et al, 2016; Xiao et al, 2016; Zhao et al, 2018). This confirmed that the expansion effects induced by the transverse deformation of the surrounding concrete and dilatancy of the concrete dowels were released by the dense cracks at the pull sides.…”

Section: Resultsmentioning

confidence: 78%

“…According to these studies, the monotonic static performance of a PBL shear connector is affected by the hole diameter, reinforcement ratio, and material strength. In addition, the bearing mechanism of shear connectors in composite beams differs significantly from those in steel–concrete joints (He et al, 2016; Xiao et al, 2016). Zhao et al (2018) addressed the contribution of the adhesive effect, shear-friction effect, and dowel action to the bearing capacity of PBL shear connectors.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation on the cyclic performance of perfobond rib shear connectors

Liao

et al. 2020

Advances in Structural Engineering

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The behavior of perfobond rib shear connectors (PBL shear connectors) under monotonic loading has been widely studied. However, the performance of these connectors under cyclic loading is poorly understood and has seldom been investigated. This work presents an experimental study focusing on the cyclic performance of representative PBL shear connectors with passing rebar. Optical fibers were introduced to measure the detailed strain distributions. Results showed that the bearing capacity of these connectors could reduce up to 55.04% when compared with that under monotonic loading. The performance of these connectors differed significantly between the pull and push directions in the cyclic loading process. The concrete cracks, relative slip, and strains were developed earlier and more completely under pull than under push. Furthermore, rapid stiffness degradation, severe cracking and deformation of the concrete dowels were revealed, indicating the rapid failure of the adhesive effect, reduction of both the shear-friction effect and the dowel action of the passing rebars. These factors all contributed to the observed significant cyclic deterioration of the peak load and the slip. Based on this, a modified formula was proposed to consider the reduction effect. Comparisons between the analytical solution and test results validated the formula.

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Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the cyclic performance of perfobond rib shear connectors

Liao

et al. 2020

Advances in Structural Engineering

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“…1,2 The steel beam and the concrete slab of the steelconcrete composite beam bridge are connected by shear connectors. [3][4][5][6] During long-term use, the steel-concrete composite girder bridge is under repeated load fatigue, 7,8 and under the impact of dynamic load 9,10 the shear connectors will gradually be destroyed, resulting in slippage which reduces the connection performance of the composite structure. The overall stiffness decreases, the bearing capacity decreases, and the natural vibration performance of the structure changes.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the dynamic responses of steel-concrete girder bridges subjected to moving vehicular loads

Gao

Zhang

Wang

et al. 2020

Measurement and Control

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The steel-concrete composite girder bridge is a new type of bridge. The steel girder and concrete slab are connected together by connectors and bear the common force so that the tensile performance of steel and the compressive performance of concrete can be fully utilized. The advantages are obvious. However, research on the dynamic analysis of steel-concrete composite beam bridges is still relatively rare, and the dynamic effects on these bridges from vehicles are becoming increasingly significant. In this paper, a more complex steel-concrete composite simply supported beam bridge model and the entire vehicle model are established, and five steel-concrete connection levels of the bridge model are considered. Using the finite element model, the effects of five factors, namely, bridge natural frequency, vehicle natural frequency, vehicle speed, vehicle lateral position and bridge deck roughness, on the dynamic load allowance ( DLA) of the composite girder bridge are studied. The influence of vehicle speed and bridge surface roughness on the DLA has a strong regularity. The change in the DLA of the lateral position of the vehicle is highly symmetrical, and the DLA value at the side beam is larger than that of the center beam. Changes in bridge vibration frequency and vehicle vibration frequency can bring about significant changes in the DLA, and the closer the two frequencies are, the more significant the DLA increases, and the more likely it is to produce resonance.

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“…According to the principle of structure design "strong shear and weak bending," shear strength becomes the control condition of the strength calculation. When shear strength calculation was not estimated accurately, the structure would lead to the lack of shear capacity even the shear failure [19][20][21][22][23], so shear storage capacity was analyzed in this paper based on the low cyclic loading test results of vertical stiffener joints between CFDST columns and steel beams. A conceptual model is presented for assessing the cracked vertical stiffener joints with shear failure.…”

Section: Introductionmentioning

confidence: 99%

Shear Storage Capacity of Vertical Stiffener Joints between Concrete‐Filled Double Steel Tubular Columns and Steel Beams

Zhou

Zhang

Wang

et al. 2019

Advances in Civil Engineering

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Based on the low cyclic loading test results of vertical stiffener joints between concrete-filled double steel tubular (CFDST) columns and steel beams, the shear transfer mechanism and shear resistance were analyzed in this paper. A conceptual model formulated was presented in terms of equilibrium and stress-strain relationships. The results calculated by the theoretical model and the available experimental data were compared, and then one new concept of shear storage coefficient was proposed for the determination of the shear storage capacity of the joint, which quantitatively explained the ductility failure progression of the joint specimens in the seismic performance test. It was concluded that the vertical stiffener joint had sufficient shear resistance, which met the seismic design principle of strong shear and weak bending. Results show that the ribbed joints have greater shear resistance than unribbed ones; lengthening the overhang of the vertical stiffener can both increase shear resistance and shear storage capacity of the joint; axial compression ratio can reduce the shear storage capacity. The paper also suggests that the joint design should ensure enough safety storage of shear resistance to improve the seismic performance.

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Behavior of Perforated Shear Connectors in Steel–Concrete Composite Joints of Hybrid Bridges

Cited by 25 publications

References 14 publications

Experimental investigation on the cyclic performance of perfobond rib shear connectors

Experimental investigation on the cyclic performance of perfobond rib shear connectors

Numerical investigation of the dynamic responses of steel-concrete girder bridges subjected to moving vehicular loads

Shear Storage Capacity of Vertical Stiffener Joints between Concrete‐Filled Double Steel Tubular Columns and Steel Beams

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