Fatigue Analysis of Tower Crane Grillage Wall Bracket Connection

Lincoln, Mitchell (2018) Fatigue Analysis of Tower Crane Grillage Wall Bracket Connection. [USQ Project]


This dissertation examines the potential for using chemical anchors as fixings, for use in dynamic loading situations such as tower crane installations. The justification for the research is aimed around examining the use of the fixing where safety is paramount and failure from misunderstanding can have major impacts to surroundings. Chemical anchors have several advantages over other methods of fixings into concrete such as flexibility, adjustment, planning and expedience. However, these advantages come with a reduced capacity for loading and the number of anchors needs to be vastly increased to cope with these reduced capacities.

An option for using the chemical anchors for a tower crane installation was used as a basis for undertaking a fatigue analysis. Literature from Hilti showed a negligible impact on the chemical component under dynamic loading. The threaded rod component however, is unsuitable due to the stress concentrations in the thread roots. A stress-life fatigue method was adopted to determine the expected life of the threaded rod with finite element analysis results to confirm. Due to the configuration of the chemical anchors, repeated bending of the threaded rod would lead to an estimated life of approximately 54 days. This estimated life was well below the required installation life of 365 days.

Results showed that the chemical anchors are generally suitable for use in dynamic situations under certain configurations. It is recommended that in any dynamic loading situations using chemical anchors, a fatigue analysis be performed as the configuration of the assembly can have major implications on the estimated life expectancy of the anchors.

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Item Type: USQ Project
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021)
Supervisors: Malpress, Ray
Qualification: Bachelor of Engineering (Honours) (Mechanical)
Date Deposited: 30 Aug 2022 03:33
Last Modified: 29 Jun 2023 01:51
Uncontrolled Keywords: chemical anchors; tower crane installations; wall bracket connection
URI: https://sear.unisq.edu.au/id/eprint/40687

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