Structural Performance of Prestressed Concrete Bridge Piles Using Duplex Stainless Steel Strands
Publication: Journal of Structural Engineering
Volume 143, Issue 7
Abstract
The use of duplex high-strength stainless steel (HSSS) Grade 2205 prestressing strand and austenitic stainless steel (SS) Grade 304 spiral wire reinforcement is proposed for reinforcing prestressed concrete piles in marine environments in order to provide a 100+ year service life. The study experimentally investigated 40.6-cm-square, 21.3-m-long piles, which were successfully driven to refusal without visible damage, extracted, and tested in flexure and shear. Flexural and shear strength of piles using duplex HSSS 2205 strands were greater than predicted by design specifications. Experimental prestress losses for piles using duplex HSSS 2205 strands were approximately 80% of the predicted losses by standard provisions and were not affected by pile driving and extraction. These findings indicate that duplex HSSS 2205 can be used for prestressing strands in combination with austenitic SS 304 for the transverse confinement and shear reinforcement for prestressed concrete piles, using the same design requirements and construction procedures used for conventional prestressing strand and wire reinforcement.
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Acknowledgments
The research reported herein was sponsored by the Georgia Department of Transportation through Research Project Number 11-34, Task Order Number 02-105. Mr. Paul Liles, Assistant Division Director of Engineering, Mr. Ben Rabun, Bridge and Structures Engineer, and Ms. Supriya Kamatkar, Research Engineer, of GDOT provided many valuable suggestions throughout the study. The opinions and conclusions expressed herein are those of the authors and do not represent the opinions, conclusions, policies, standards, or specifications of the Georgia Department of Transportation, the Federal Highway Administration, or of other cooperating organizations. Mr. Nan Gao assisted during flexure and shear testing, and Dr. Preet Singh guided and assisted in corrosion testing.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 143 • Issue 7 • July 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jan 22, 2016
Accepted: Dec 7, 2016
Published online: Mar 2, 2017
Published in print: Jul 1, 2017
Discussion open until: Aug 2, 2017
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