Experimental and analytical study on fatigue behavior of composite truss joints

Liu, Yuqing; Xin, Haohui; He, Jun; Xue, Dongyan; Ma, Biao

doi:10.1016/j.jcsr.2012.12.020

Cited by 36 publications

(14 citation statements)

References 8 publications

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“…Steel and concrete composite structures are widely used in bridges due to their favorable performance and economic cost. Various types of innovative composite structures have been developed in bridge structures, such as composite girders with corrugated steel webs [1], hybrid girders [2], pile cap strengthening [3], and composite trusses [4]. To optimize the structural behavior of composite structures, it is critical to ensure the shear connection between steel and concrete members.…”

Section: Introductionmentioning

confidence: 99%

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Analytical Model for Load–Slip Relationship of Perfobond Shear Connector Based on Push-Out Test

2018

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In composite structures, the perfobond connector is an alternative type of shear connector which consists of a steel plate with a certain number of holes. The load–slip relationship is critical for structural analysis and numerical simulation of composite structures using perfobond connectors. In this study, push-out tests were conducted on 72 specimens to obtain the load–slip behaviors of perfobond connectors. Based on the test results, parametric study was performed to analyze the effects of changing the hole geometry, the concrete strength, the configuration of the rebar in hole, the dimensions of the perfobond rib, and the size of the concrete slab. Furthermore, the characteristics and physical meanings of the load–slip curves were analyzed, and the limits and conditions for theoretical expressions were derived. Finally, an analytical model was proposed to express the load–slip relationship of perfobond connectors covering a wide range of design variables.

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Section: Introductionmentioning

confidence: 99%

“…Moreover, several researchers have reported that the perfobond connector has high shear stiffness and strength in push-out tests [16,17,18]. As a result, perfobond connectors are increasingly used in many types of composite bridge structures which need to carry great dynamic loads [3,4], as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Analytical Model for Load–Slip Relationship of Perfobond Shear Connector Based on Push-Out Test

2018

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“…e shear stiffness of new RPBLs increases with the increase of c, the ratio of the horizontal projected length of hollows to the hole diameter. Figure 19 compares the numerical results with the calculated results by equation (1), where the coefficient of determination is 0.89 and the standard variation is 0.12, which should be improved in future works. k s,RPBL � 1 − (1 − c) 1.37 k s,PBL .…”

Section: Effects Of Rubber Ring Ickness Lastlymentioning

confidence: 94%

“…Perfobond connectors (PBL) are increasingly used in steelconcrete composite structures due to their excellent shear and fatigue capacity [1,2]. As shown in Figure 1, PBLs are usually employed as a group with multiple rows and columns in practical applications, such as the joints of hybrid girders, the interfaces of composite girders with corrugated webs, the interfaces of hybrid trusses, and the anchorage joints between suspenders and girders [3].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Shear Performance of a New Perfobond Connector with Controllable Stiffness

Liu

Xin

et al. 2020

Advances in Materials Science and Engineering

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To improve the shear behavior and design applicability of rubber ring perfobond connectors (RPBLs), a new rubber ring that aims to make the shear stiffness of RPBLs controllable was proposed. Firstly, the conceptual design and configuration of the new rubber rings were presented and discussed. Subsequently, finite element (FE) models for modified push-out tests of new RPBLs were established based on the validated modeling method. The initial shear stiffness is dominated by the horizontal projected contact area between hole walls and concrete dowels. γ is defined as the ratio of the horizontal projected length of hollows to the diameter of holes. The shear stiffness of new RPBLs is about 35%, 60%, and 82% of the shear stiffness of PBLs when γ equals 0.25, 0.5, and 0.75, respectively. Employing the new rubber rings with varying central angles on conventional PBLs is feasible to obtain the required stiffness for RPBLs. Further, the effects of the number of sectors, the size of side wings, the central angle of hollows, the offset angle, and the thickness of rubber rings were analysed. Based on the numerical results, the proper thickness of side wings is no larger than 2 mm. The thicker side wing could reduce the confinement effects provided by surrounding concrete on concrete dowels, resulting in a drop of the yield load of new RPBLs. The number of sectors is suggested to be no less than 6 so that the shear behavior of new RPBLs is irrelevant to the offset angle. Besides, the shear stiffness is not related to the thickness of rubber rings. To improve the yield load of RPBLs and obtain the moderate recovered stiffness, the thickness of rubber rings is recommended as 2 mm. Finally, the expression for the shear stiffness of new RPBLs was proposed.

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“…The results of the test are analyzed and validated by using the finite element numerical simulation. At present, there is less domestic research on concrete composite girder bridge with steel truss webs [3][4][5][6][7][8] . The shear lag effect of simply supported steel truss concrete composite beams under concentrated loads and uniform loads are researched by Shangmin Zheng [2] using ANSYS finite element software.…”

Section: Introductionmentioning

confidence: 99%

Parameter Analysis on shear lag effect of composite girder with steel truss webs

Lei¹,

Tian²,

Li³

et al. 2016

Proceedings of the 2016 International Forum on Energy, Environment and Sustainable Development

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In order to fully understand the shear lag effect variation of concrete composite girder with steel truss webs, the 3D finite element model is established with general finite element software ANSYS, considering three typical load models of mid-span concentrated load, two points symmetrical load and uniform load. The effect of geometric parameters on shear lag effect of simply supported concrete composite girder with steel truss webs is analyzed. Geometric parameters include the span-width ratio, the width-height ratio and wing-thickness ratio. The results show that under three load cases, the influence of the span-width ratio and the width-height ratio on shear lag effect of the prestressed concrete composite girder with steel truss webs was analyzed. The results show that the span-width ratio has greater influence on shear lag effect of the prestressed concrete composite girder with steel truss webs, while the width-height ratio and other parameters have less influence on shear lag effect. And the results indicate that for continuously supported prestressed concrete composite girder with steel truss webs, the negative shear lag effect is quite obvious near the cross-section of mid-support, which needs to attach great importance in the design.

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Experimental and analytical study on fatigue behavior of composite truss joints

Cited by 36 publications

References 8 publications

Analytical Model for Load–Slip Relationship of Perfobond Shear Connector Based on Push-Out Test

Analytical Model for Load–Slip Relationship of Perfobond Shear Connector Based on Push-Out Test

Numerical Study on Shear Performance of a New Perfobond Connector with Controllable Stiffness

Parameter Analysis on shear lag effect of composite girder with steel truss webs

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