PSI - Issue 19

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 19 (2019) 395–404

Fatigue Design 2019 Investigations on the fatigue behavior of end plate connections with prestressed bolts Fatigue Design 2019 Investigations on the fatigue behavior of end plate connections with prestressed bolts

Helen Bartsch a *, Benno Hoffmeister a , Markus Feldmann a a Institute of Steel Construction, RWTH Aachen, Mies-van-der-Rohe Str. 1, 52074 Aachen, Germany Helen Bartsch a *, Benno Hoffmeister a , Markus Feldmann a a Institute of Steel Construction, RWTH Aachen, Mies-van-der-Rohe Str. 1, 52074 Aachen, Germany

Abstract In many areas of our infrastructure, as for instance the construction of crane runway beams, fatigue design of steel structures is a major issue. An important detail in practice, but insufficiently classified in the (Eurocode 3-1-9, 2005) detail catalogue, is the end plate connection with prestressed bolts. Detailed numerical simulations are often necessary for the fatigue check of the weld at the T-stub. The knowledge of the true bolt force required in the detail catalogue can usually also only be taken into account using finite element simulations. For these reasons, the detail ‘end plate connection with different weld configurations and prestressed bolts’ containing the two critical design cases mentioned above has been investigated. The analyzed details comprise butt welds as well as fillet welds and connections with overhanging and flush end plate connections. A literature review of fatigue in details of end plate connections is given. Moreover, the test program on three fatigue tests series is presented. After conducting experimental investigations on small-scale as well as large-scale specimens detailed numerical simulations have been realized. In order to assess the fatigue resistance of the welded connection, the effective notch stress concept has been used. Additionally, fatigue resistances of prestressed bolts have been investigated by recalculating the bolt force progress. After the verification of the numerical models, a parametric study has been conducted by varying geometric characteristics in order to give recommendations on the design of prestressed bolts and welds in end plate connections. Abstract In many areas of our infrastructure, as for instance the o stru tion of crane runway beams, fatigue design of steel structures is a m jor issu . An important detail in practice, but ins fficiently classified in the (Eurocode 3-1-9, 2005) detail catalogue, is the end plate connection with prestressed bolts. Detail d numerical simulations re often ecessary for the fatigue check of the weld at the T-stub. The knowledge of the true bolt force required i the d tail catalogue can usually also only be taken into account using finite element simulations. For these reasons, the detail ‘end plate connection with different weld configurations and prestressed bolts’ containing the two critical design cases mentio ed above as been investigated. The analyzed details comprise butt welds as w ll as fill t welds and connections with overhanging and flush end plate connections. A lit rature review of fatigue in details of end plate connecti s is given. Moreover, the test program on three fatigue tests series is presented. After conducting experimental investigations on small-scale as well as large-scale specimens detailed numerical simulations have been realized. In order to assess the fatigue resistance of the welded connection, the effective notch stress concept has b en used. Additionally, fatigue resistances of prestressed bolts have been inv stigated by recalculating the bolt force progress. After the verification of the numerical models, a param tric study has been co ucted by varyi g geometric characteristics in order to give recommendations on the design of prestressed bolts and welds in end plate connections.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. Keywords: fatigue; fatigue test; end plate connection; prestressed bolts; effective notch stress; Keywords: fatigue; fatigue test; end plate connection; prestressed bolts; effective notch stress;

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. * Correspon ing autho . Tel.: +49 241 80 23595; fax: +49 241 80 22140. E-mail address: h.bartsch@stb.rwth-aachen.de * Corresponding author. Tel.: +49 241 80 23595; fax: +49 241 80 22140. E-mail address: h.bartsch@stb.rwth-aachen.de

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 10.1016/j.prostr.2019.12.043