Resistance of headed studs subjected to fatigue loading. Part I: Experimental study

Gerhard Hanswille*, Markus Porsch, Cenk Ustundag

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Özet

In steel-concrete composite structures the transfer of longitudinal shear forces at the interface between steel and concrete is mostly realized by headed shear studs. Especially in bridges due to traffic loads these shear connectors are subjected to high-cycle loading and the fatigue resistance governs the design. In this first part of two companion papers a series of experimental work with standard EC4 push-out specimens is presented. The main purpose of these tests was to determine the fatigue life and a possible reduction of the static strength of the headed shear studs subjected to unidirectional cyclic loading. A further aspect was to examine the effects of the loading sequence and damage accumulation on the fatigue life. The results of the experimental investigations show that due to a crack initiation at the stud foot at 10%-15% of the fatigue life, an early reduction of the static strength is caused. Furthermore tests to examine the effects of the loading sequence on the fatigue life revealed that the linear damage accumulation hypothesis according to Palmgren and Miner on which the present design codes are based do not describe the real behaviour.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)475-484
Sayfa sayısı10
DergiJournal of Constructional Steel Research
Hacim63
Basın numarası4
DOI'lar
Yayın durumuYayınlandı - Nis 2007
Harici olarak yayınlandıEvet

Finansman

The experimental program described in this paper is financed by the German Research Foundation (DFG) within the scope of Collaborative Research Centre 398. Gerhard Hanswille, Prof. Dr.-Ing . Since 1992 Professor for Steel and Composite Structures at the University of Wuppertal, Germany. Chairman of the German Standard Committee for Composite Structures and member of the Project Team for Eurocode 4 Part 1-1 and Part 2. Senior partner of HRA consulting engineers in Bochum, Germany and involved in composite and steel bridge and building design. Markus Porsch, Dipl.-Ing. Since 2000 assistant at the Institute for Steel and Composite Structures at the University of Wuppertal, Germany. International Welding Engineer (IWE). Cenk Ustundag, M.Sc. Since 2002 doctoral candidate at the Institute for Steel and Composite Structures at the University of Wuppertal, Germany. Holder of the German Academic Exchange Service (DAAD) Research Grant for Doctoral Candidates since 2003.

FinansörlerFinansör numarası
California Department of Fish and Game
Deutsche Forschungsgemeinschaft

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