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Refined 3D strut-and-tie model for analysis and design of four-pile caps

Meléndez, Carlos, Sagaseta, Juan, Miguel Sosa, Pedro F. and Pallarés Rubio, Luis (2018) Refined 3D strut-and-tie model for analysis and design of four-pile caps ACI Structural Journal.

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Abstract

Pile caps used in foundations are commonly designed for simple cases of loading and geometry using the strut-and-tie method. This approach is known to provide safe designs and rather conservative predictions of the ultimate failure load of tests. This level of conservatism is due mainly to the large simplifications made in the geometry assumed which in many cases ignore relevant parameters such as the size of the column. A three-dimensional strut-and-tie model is presented for four-pile caps in which the geometry adopted is optimized. The inclination of the direct strut from the column to the pile is obtained analytically through the maximization process of the resisting load carried by the truss assuming different modes of failure (flexural and shear). This approach is shown to provide more accurate predictions of strength of existing deep pile cap tests with lower scatter compared to design approaches in the literature and ACI 318 Code.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
NameEmailORCID
Meléndez, Carlos
Sagaseta, JuanJ.Sagaseta@surrey.ac.uk
Miguel Sosa, Pedro F.
Pallarés Rubio, Luis
Date : 2018
Copyright Disclaimer : © Copyright 2018, American Concrete Institute. All rights reserved, including the making of copies by any means, including but not limited to downloading of HTML files, or by electronic, photoduplicating, or other mechanical device, printed, written or oral, or recording for sound or visual reproduction for use in any knowledge or retrieval system or device, or recording for sound unless permission is obtained from the copyright proprietors.
Uncontrolled Keywords : Pile cap; Reinforced concrete; Strut-and-tie method; Truss model; Design; Discontinuity region; Shear; Three-dimensional; Finite element analysis
Related URLs :
Depositing User : Clive Harris
Date Deposited : 10 Oct 2018 13:26
Last Modified : 10 Oct 2018 13:26
URI: http://epubs.surrey.ac.uk/id/eprint/849633

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