Case Study on the Collapse Potential of a Wharf Supported by Severely Deteriorated Steel Piles under Gravitational Loads
Publication: Journal of Performance of Constructed Facilities
Volume 32, Issue 5
Abstract
This paper presents findings from a research project on the development of a numerical framework to predict the collapse load of a wharf supported by corroded piles under gravitational loads. Data from a detailed marine investigation performed in 2012 were used to analyze the structure. The nonlinear responses of corroded piles were predicted using detailed finite-element analyses and incorporated into a simplified model of half of the wharf. This paper investigates the performance of the structure and its dependence on the superstructure stiffness, substructure redundancy, and distribution of the degree of pile corrosion. The findings indicate that increasing the stiffness of the superstructure up to a limiting value results in enhanced load redistribution capability of the structure, a larger number of buckled piles prior to collapse, and a higher collapse load. The results also show that buckled piles may continue to support loads close to but less than their peak capacities if the superstructure is stiff and strong enough. The paper provides a framework for assessing the performance of similar highly redundant, heavily deteriorated structures.
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Acknowledgments
The authors gratefully acknowledge the support of Simpson Gumpertz & Heger, Inc. (SGH) and Appledore Marine Engineering, Inc. (AMEI) throughout this project. The financial support provided by the University of Houston is also gratefully acknowledged.
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©2018 American Society of Civil Engineers.
History
Received: Dec 27, 2017
Accepted: Apr 24, 2018
Published online: Aug 2, 2018
Published in print: Oct 1, 2018
Discussion open until: Jan 2, 2019
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