Ermüdung von Verbunddübelleisten

Christou, George; Ungermann, Jan; Wolters, Kevin; Hegger, Josef; Claßen, Martin

doi:10.1002/best.201900091

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…It provides great opportunities to analyse structures composed of various materials, e.g., reinforced concrete or masonry [17][18][19]. The use of advanced material models allows analysis of structural load-bearing capacity, damage development [20][21][22][23], changes in stress state and adhesion deformation and reinforcement anchoring [24][25][26]. Despite the development of knowledge and the continuous increase of computing power, it is not yet possible to build a numerical model of a structure enabling a global analysis that includes all physical phenomena.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Study on the Shear Capacity of Traditional Joints between Walls Made of AAC Masonry Units

2020

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This paper presents the development of a numerical model aimed at the simulation of nonlinear behaviour of traditional joints between walls made of autoclaved aerated concrete (AAC) masonry units. Nonlinear behaviour and cracking of AAC and mortar were simulated using the concrete damaged plasticity (CDP) model available in the ABAQUS finite element software. The paper also presents and discusses the results of an experimental campaign involving testing six T-shaped, monosymmetric samples with traditional joints between walls loaded in shear. The results were used to validate the numerical model. The validation confirmed that the model is capable of producing accurate results and predicting the structural behaviour with a reasonably good accuracy in elastic and post-elastic stages. Furthermore, a sensitivity study was conducted, in which the variation of elastic modulus, Poisson’s ratio, tensile strength, compression strength and fracture energy of AAC was investigated. Results showed that the variation of elastic modulus, tensile strength and fracture energy is most critical to the structural behaviour of the model, while variation of the remaining parameters has a negligible effect on the results.

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Section: Introductionmentioning

confidence: 99%

Finite Element Study on the Shear Capacity of Traditional Joints between Walls Made of AAC Masonry Units

2020

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“…Here, a new test rig was deployed which led to promising results regarding fatigue failure of rib shear connectors under cyclic shear loading. Additional investigations and analysis of the results led to an engineering model in [8]. The latter allows the calculation of the lifespan of rib shear connectors in case of cyclic pry-out failure depending on loading parameters and the static dowel characteristic curve of the rib shear connectors.…”

Section: State Of the Artmentioning

confidence: 99%

“…load cycles. According to the observations made in [8], cyclic pry-out failure is a slippagedependent failure mode as opposed to pry-out failure under static loading. Thus, fatigue failure in case of cyclic pry-out can be assumed to be reached faster in the girder test.…”

Section: Test Parametersmentioning

confidence: 99%

Concrete fatigue of composite constructions with rib shear connectors

2021

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Rib shear connectors are gaining increasingly attention in the field of composite constructions. Especially in bridge constructions, rib shear connectors offer many advantages compared to conventional composite shear connectors such as headed studs. In order to describe the load‐bearing behaviour of rib shear connectors under cyclic loading, the successively increasing slip resulting from the cyclic loading of the shear connectors must be taken into account. The latter leads to the growth of the relative displacements along the composite joint and thus, to the degradation of the previously rigid shear connection. This effect leads to rearrangements of internal forces between the composite partners through which the load bearing behaviour and load bearing capacity of the structure alter. In this article results of experimental investigations on two cyclic single Push‐Out‐Tests (sPOT) and one full‐scale girder test regarding the degradation of the composite interconnection are presented and analysed. The investigated shear connectors in the full‐scale girder test are subjected to a comparable load history to that of the connectors in the sPOT. The results give insight into the effects of the degradation of the shear connection, as previously seen in sPOT, on the overall load bearing behaviour of composite girders.

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“…While high stiffness is required from the connectors to minimize the deflection of composite girders, they must also be ductile in order to allow for force redistribution within the composite joint and thus a plastic design. Composite dowels possess both these properties and are therefore favoured increasingly both in building [1][2][3][4][5][6] and bridge [7][8][9][10][11][12][13][14][15][16] constructions. These innovative shear connectors are cut into the steel web or into the flanges of steel girders and positioned within the concrete slab, as shown in an example in Figure 1a or Figure 1c.…”

Section: Introductionmentioning

confidence: 99%

Combined Shear-Tension Loading of Composite Dowels in Cracked Concrete—Experimental Investigations and Design

et al. 2022

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The importance of slim decks has led engineers to the exploration of high-strength materials and also of innovative shallow shear connectors, such as composite dowels in the case of composite constructions. Minimizing the overall slab depth often leads to composite girders being weakened by means of web openings that are necessary for installations such as ventilation ducts. Depending on the geometrical and loading conditions, some of the shear connectors are subjected to a combination of tensile and shear forces. However, the load-bearing behaviour of these connectors has only been rudimentarily investigated in the case of shear-tensile interaction. In addition, the load-bearing capacity of composite dowels under combined tensile and shear forces has not been investigated in cracked concrete. Earlier investigations under pure shear and pure tensile loading indicate a dependence of the connectors’ load-bearing behaviour on the crack width, so that under combined loading, a similar influence is expected. In this paper, experimental investigations on composite dowels in transversely cracked concrete under systematically varied shear-tension loading combinations are presented. Hereby, predefined crack widths and patterns were considered using a special test rig. Finally, a design approach for concrete failure of composite dowels under shear-tension loading is proposed based on the test results.

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Ermüdung von Verbunddübelleisten

Cited by 8 publications

References 25 publications

Finite Element Study on the Shear Capacity of Traditional Joints between Walls Made of AAC Masonry Units

Finite Element Study on the Shear Capacity of Traditional Joints between Walls Made of AAC Masonry Units

Concrete fatigue of composite constructions with rib shear connectors

Combined Shear-Tension Loading of Composite Dowels in Cracked Concrete—Experimental Investigations and Design

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