Research on fatigue cracks in composite dowel shear connection

Harnatkiewicz, P.; Kopczyński, A.; Kożuch, M.; Lorenc, W.; Rowiński, S.

doi:10.1016/j.engfailanal.2011.03.016

Cited by 27 publications

(13 citation statements)

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“…3. Zespolenie typu "composite dowels": a) kształt PZ, b) kształt MCL [3] W pracach [6][7][8] podjęto próbę zaadaptowania zespolenia typu "composite dowels" (dla nowego kształtu linii rozcięcia) do blachownic spawanych, stanowiących elementy składowe prefabrykowanych dźwigarów mostowych. Propozycja ta może stanowić uzupełnienie dotychczas stosowanych rozwiązań zespolonych dźwigarów mostowych.…”

Section: Rys 2 Przekrój Poprzeczny Dźwigara Vft-wib [3]unclassified

Analiza numeryczna segmentu stalowo-betonowego dźwigara mostowego obciążonego ciężarem własnym

Lacki

Nawrot

Derlatka

2017

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

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Jednym ze sposobów konstruowania przęseł mostów średniej rozpiętości jest stosowanie zespolonych dźwigarów stalowo-betonowych typu VFT, które przedstawiono między innymi w pracach [1, 2]. W rozwiązaniu tym stalowa blachownica spawana prefabrykowana jest wraz z półką żelbetową, stanowiącą jednocześnie deskowanie dla monolitycznej płyty pomostu, betonowanej podczas montażu. Zespolenie belki z płytą zapewnione jest za pomocą łączników sworzniowych (rys. 1).

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Section: Rys 2 Przekrój Poprzeczny Dźwigara Vft-wib [3]unclassified

Analiza numeryczna segmentu stalowo-betonowego dźwigara mostowego obciążonego ciężarem własnym

Lacki

Nawrot

Derlatka

2017

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

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“…More information concerning the behaviour of composite dowels in general can be found in , . Fatigue of steel dowels is discussed in , , and is dedicated to fatigue of the MCL shape. Testing procedures used in testing composite dowels are presented in .…”

Section: Elastic Approachmentioning

confidence: 99%

Non‐linear behaviour of steel dowels in shear connections with composite dowels: design models and approach using finite elements

Lorenc

2016

Steel Construction

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“…The failure mechanism identified for the PZ steel connector consists of a single fatigue crack initiation from the lower geometrical notch of the PZ shape and its propagation towards the beam's flange, up to brittle failure of the beam. That failure mechanism, together with an FE numerical analysis and a description of material research on fatigue cracks, is presented in , .…”

Section: Fatigue Limit Statementioning

confidence: 99%

Elastic behaviour of the steel part of a shear connection with MCL composite dowels

Kożuch

Rowiński

2016

Steel Construction

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Originally, the idea for determining the elastic resistance of a steel dowel based on the stress layout was described by Lorenc in [5]. A stress plot at the dowel root is the result of the superimposition of two effects; one of them is the result of global internal forces acting on a beam, i.e. global bending moment and/or axial force, and the second is an effect of local longitudinal shearing forces. The first effect, the global one, results in normal stresses at a dowel root which are increased by the effect of the geometrical notch. The second effect, the local one, results in a stress plot in and around the steel dowel caused by contact pressure at the steel-concrete interface (the steel dowel is then bent and sheared). For SLS, reduced stresses are considered, and for FLS, the first principal stresses. The first analyses were based on test results and numerical investigations, both for the PZ composite dowel shape. The analytical approach was omitted, the reason being the complexity of the problem, because of dowel geometry and, mainly, steel-concrete contact effects. Mathematical equations were adopted to describe variable stress values along the edge of the steel dowel as a function of the distance measured from its root. This approach led to two equations being derived, one describing the stress state in the dowel depending on a global stress value in a beam (M + N) at the level of the dowel root and the distance from dowel root to point considered, and a second one describing the stress state in the dowel depending on a longitudinal shear force value and the distance from dowel root to point considered. Adding these two equations linearly produces the stress state along the dowel edge. Appropriate mathematical operations made it possible to find the maximum stress as a function of the internal forces (M, N, VL) and, furthermore, to create a dimensionless envelope of connector resistance, already including stress concentration factors. Knowing the normal stress value at the point of the dowel root (without taking into account a notch concentration factor) and the value of the longitudinal shearing force, it is possible to check whether the maximum stresses in the dowel considered exceed a permissible stress value, e.g. yield strength of steel. The envelope presented in Fig. 1 was initially calculated only for the case of global normal stresses having the same sign as the maximum stresses re-

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Research on fatigue cracks in composite dowel shear connection

Cited by 27 publications

References 1 publication

Analiza numeryczna segmentu stalowo-betonowego dźwigara mostowego obciążonego ciężarem własnym

Analiza numeryczna segmentu stalowo-betonowego dźwigara mostowego obciążonego ciężarem własnym

Non‐linear behaviour of steel dowels in shear connections with composite dowels: design models and approach using finite elements

Elastic behaviour of the steel part of a shear connection with MCL composite dowels

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