Campus Units

Civil, Construction and Environmental Engineering

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

8-2015

Journal or Book Title

Soils and Foundations

Volume

55

Issue

4

First Page

678

Last Page

690

DOI

10.1016/j.sandf.2015.06.002

Abstract

The potential consequences of switching the design and construction of bridge foundations in sand and mixed soil profiles from an interim procedure based on Allowable Stress Design to the Load and Resistance Factor Design (LRFD) procedure were examined. Independent data of 451 production steel H-piles driven in sand and 173 production steel H-piles driven in mixed soil profile were used to evaluate the adequacy of the regionally calibrated LRFD procedure and investigate its economic implications. This study concludes that the regional LRFD procedure will increase the plan pile length by 25% for sand and 12% for mixed soil profile as opposed to 86% and 93%, respectively, if the American Association of State Highway and Transportation Officials (AASHTO) procedure had been implemented. Despite the additional cost incurred by switching to the regional LRFD procedure, it satisfies the target reliability index of 2.33 for a redundant pile group and the 1% probability of failure stipulated in the AASHTO LRFD Specifications. Alternatively, it can be stated that the currently used method has a reliability index of 1.7 for sand and 2.00 for mixed soil profile with approximately 30% and 10% more probability of failures, respectively. Although the research and findings presented in this paper are specific to a local area, these methods could be adopted globally to facilitate the implementation of the regional LRFD procedure in bridge foundations.

Research Focus Area

Geotechnical/Materials Engineering

Comments

This is a manuscript of an article published as Ng, K., & Sritharan, S. (2015). Verification of LRFD approach for piles in sand and mixed soils. Soils and Foundations, 55(4), 678-690. doi: 10.1016/j.sandf.2015.06.002. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

Copyright Owner

The Japanese Geotechnical Society

Language

en

File Format

application/pdf

Published Version

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