Ermüdungsuntersuchungen an Verbundträgern mit Verbunddübelleisten und nachgiebiger Verbundfuge mittels Stabwerkmodellen/Fatigue investigations on composite beams with composite dowels and flexible composite joint using framework models

Wolters, Kevin; Feldmann, Markus

doi:10.37544/0005-6650-2018-11-47

Cited by 7 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, slip and shear force of each shear connector is calculated. More information about this method can be found in [18]. In contrast to FE simulations with volume elements e.g.…”

Section: Lamella Model and Input Parametersmentioning

confidence: 99%

Probabilistic Design of Composite Girders Considering the Degradation of the Shear Connection and the Redistribution of Forces

2023

View full text Add to dashboard Cite

Fatigue design of composite girders and in particular shear connectors according to Eurocode 4 is based on fatigue strength curves. Therefore, the lifetime of a girder can be limited by failure of a critical shear connector. The failure probability of a component is thus determined by the failure probability of one shear stud or composite dowel, although a composite girder is an internally highly statically indeterminate system with the possibility of redistributing forces in the shear connection. This paper outlines the positive effects on the lifetime of a girder by considering crack propagation and residual capacity of shear connectors with cracks as well as redistributing forces towards less stressed and damaged connectors. The failure probability of a girder is determined by a Monte Carlo simulation using a lamella model with incremental calculation of the degradation of the shear connection. The results show the economic potential of a future global safety concept for composite girders especially with composite dowels.

show abstract

“…Furthermore, slip and shear force of each shear connector is calculated. More information about this method can be found in [18]. In contrast to FE simulations with volume elements e.g.…”

Section: Lamella Model and Input Parametersmentioning

confidence: 99%

Probabilistic Design of Composite Girders Considering the Degradation of the Shear Connection and the Redistribution of Forces

2023

View full text Add to dashboard Cite

show abstract

“…A beam-spring-model described in [8] is used for the system reliability investigations of the shear connection with brittle shear connectors. The procedure is shown exemplarily in Figure 5.…”

Section: Composite Beams With Brittle Shear Connectorsmentioning

confidence: 99%

Investigations on the system reliability of composite beams by transferring brittle and ductile Daniels systems to the shear connection

Wolters,

Rittich,

Nonn

et al. 2023

ce papers

View full text Add to dashboard Cite

In the design of a composite beam, the load‐bearing capacity of a shear connector is assumed to have its design value PRd. But a shear connection consists of dozens to hundreds of connectors whose individual capacities are scattered and randomly distributed. Thus, the load‐bearing capacity of the shear connection is usually higher than the capacity assumed in design n · PRd.In 1945, H. G. Daniels described the system reliability of ideal elastic‐brittle fibre bundles with force redistributions after failure of individual fibres. In many cases the system reliability increases for few elements. And it increases continuously for ductile elements.This article shows a reliability analysis of ideal Daniels systems with brittle and ductile elements. For the shear connection, the ideal Daniels system is extended to unequal load distributions in the shear connection of a composite beam. In parameter studies, the influence of the number of connectors on the system reliability of the composite beam is investigated for different boundary conditions. Again, an increase in reliability can usually be observed with only a few shear connectors. Conversely, if the reliability should remain the same, the design level of the shear connection could be raised by adjusting the partial safety factor γV.

show abstract

“…In Figure 5(c) the slip amplitudes measured at discrete positions of the HEM 500 are compared with the slip curve calculated using the framework model described in [17], [18]. In the framework model, the composite dowels are modelled using springs whose stiffness decreases as a function of crack growth.…”

Section: Development Of Slip In the Composite Jointmentioning

confidence: 99%

“…Figure 5 Results of the beam test HEM 500: (a) Measured slip at maximum and minimum load as well as slip range Δδ at S6; (b) Relationship between slip S6and cylinder force at the beginning and end of the test, (c) slip curve over the beam length with measured values (x) and calculated (─) on the basis of the framework model from[17],[18] at the beginning (black) and end of the test (red)…”

mentioning

confidence: 99%

Crack propagation and residual load‐bearing behavior of composite dowels – effects on the global behavior of composite girders under cyclic loading

Wolters¹,

Christou²,

Feldmann³

2021

ce papers

View full text Add to dashboard Cite

Fatigue of a composite girder according to Eurocode 4 is carried out on the decisive shear connector. It is not taken into account that the composite girder is an internally highly statically indeterminate system in which the failure of a dowel does not necessarily lead to the failure of the girder. This applies in particular to composite dowels which are characterised by a crack propagation phase with a high residual load‐bearing capacity of a damaged dowel. In own small part and girder tests as well as numerical studies, numerous positive load‐bearing effects could be identified in composite girders with composite dowels, which increase the lifetime of the girder. In case of an initial crack in a steel dowel, followed by crack propagation, the stiffness degradation of the damaged connector leads to a redistribution of forces. The lifetime of a girder is limited by the residual capacity of the composite joint or by a global failure with increasing partial connection. A global safety concept for composite girders taking into account the crack development and residual strength of the dowels as well as the redistribution of forces within the composite joint holds an enormous economic potential. This article shows how these effects can be taken into account.

show abstract

Ermüdungsuntersuchungen an Verbundträgern mit Verbunddübelleisten und nachgiebiger Verbundfuge mittels Stabwerkmodellen/Fatigue investigations on composite beams with composite dowels and flexible composite joint using framework models

Cited by 7 publications

References 0 publications

Probabilistic Design of Composite Girders Considering the Degradation of the Shear Connection and the Redistribution of Forces

Probabilistic Design of Composite Girders Considering the Degradation of the Shear Connection and the Redistribution of Forces

Investigations on the system reliability of composite beams by transferring brittle and ductile Daniels systems to the shear connection

Crack propagation and residual load‐bearing behavior of composite dowels – effects on the global behavior of composite girders under cyclic loading

Contact Info

Product

Resources

About