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Development of improved models for estimation of bursting stresses in elements under high-concentrated load

Boye, Brian Adjetey; Abbey, Samuel Jonah; Ngambi, Samson; Fonte, Joao

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Authors

Brian Adjetey Boye

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Samuel Abbey Samuel.Abbey@uwe.ac.uk
Associate Director - Engineering Practice and Management/Associate Professor

Samson Ngambi

Joao Fonte



Abstract

© 2019, Brazilian Association of Computational Mechanics. All rights reserved. In precast concrete segmental tunnels, radial and circumferential joints are often the most highly stressed parts and it is therefore important to use appropriate equations to accurately analysed these joints during design and provide adequate structural capacity to avoid failure. Different design codes have put forward equations for the estimation of bursting forces due to concentrated load on precast end blocks. The equations were specifically developed for pre-stressed concrete anchors and not specifically for precast concrete segmental tunnels. The design equations often account for the effects of load eccentricity in estimating bursting force but not the peak stress. This paper assesses the accuracy of published equations for bursting force and peak stress by conducting a high-resolution two-dimensional (2D) finite element (FE) based parametric studies. It was found that the effects of load eccentricity are significant for highly concentrated loads (load width ratios less than 0.3) and that they increase the peak bursting stresses significantly. Regression analysis is used to develop equations for estimating the peak bursting stress and bursting force due to load eccentricity for the design of precast concrete tunnel segments. These equations are more accurate as compared to pre-existing equations and important for practising engineers and designers.

Citation

Boye, B. A., Abbey, S. J., Ngambi, S., & Fonte, J. (2019). Development of improved models for estimation of bursting stresses in elements under high-concentrated load. Latin American Journal of Solids and Structures, 16(1), 1-15. https://doi.org/10.1590/1679-78255031

Journal Article Type Article
Acceptance Date Dec 3, 2018
Online Publication Date Dec 7, 2018
Publication Date Jan 14, 2019
Deposit Date Feb 25, 2019
Publicly Available Date Feb 25, 2019
Journal Latin American Journal of Solids and Structures
Print ISSN 1679-7817
Electronic ISSN 1679-7825
Peer Reviewed Peer Reviewed
Volume 16
Issue 1
Pages 1-15
DOI https://doi.org/10.1590/1679-78255031
Keywords tensile bursting, precast concrete, tunnel segments, radial joint, circumferential joint
Public URL https://uwe-repository.worktribe.com/output/854409
Publisher URL https://www.lajss.org/index.php/LAJSS/article/view/5031

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