Pile cap design using strut-and-tie modelling

Buswell, William and Dao, Vinh (2013). Pile cap design using strut-and-tie modelling. In: Vinh Dao and Peter Dux, Concrete 2013: Conference Proceedings. Concrete 2013: 26th Biennial National Conference of the Concrete Institute of Australia, Gold Coast, QLD, Australia, (1-10). 16-18 October, 2013.

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Name Description MIMEType Size Downloads
Author Buswell, William
Dao, Vinh
Title of paper Pile cap design using strut-and-tie modelling
Conference name Concrete 2013: 26th Biennial National Conference of the Concrete Institute of Australia
Conference location Gold Coast, QLD, Australia
Conference dates 16-18 October, 2013
Proceedings title Concrete 2013: Conference Proceedings
Place of Publication North Sydney, NSW, Australia
Publisher Concrete Institute of Australia
Publication Year 2013
Sub-type Fully published paper
ISBN 9781877040733
Editor Vinh Dao
Peter Dux
Start page 1
End page 10
Total pages 10
Collection year 2014
Language eng
Formatted Abstract/Summary
Pile caps are an important structural component which connect superstructure with substructure and exhibit non-flexural behaviour. As a result, strut-and-tie modelling (STM) has been increasingly accepted as the preferred design option. In this paper, existing STM techniques for pile caps are first reviewed. It is shown that current STM fails to accurately predict pile cap response under the combined actions of column axial force, shear force and bending moment. It is also shown that the strut efficiency factor in AS3600-2009 may not accurately describe the compressive stress field behaviour within pile caps. The paper then presents a new concept using effective concrete stress blocks and concentrated reinforcement forces to describe pile cap response. The proposed concept is subsequently used to modify a set of existing pile cap design equations, in which column and pile bearing stresses are used as indicators for pile cap capacity. New coefficients are developed which enable these bearing stresses to be predicted when column moment and shear is present. Testing against existing pile cap data provides encouraging results, however further verification is still required.
Keyword Pile cap
Strut-and-tie modelling
Bearing stress
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2014 Collection
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Created: Wed, 22 Jan 2014, 12:29:59 EST by Julie Hunter on behalf of School of Civil Engineering