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Title:

Splitting/Bursting Performance of Prestressed Concrete Prisms

Accession Number:

01663280

Record Type:

Component

Abstract:

This numerical parametic study focuses on evaluating the splitting/bursting performance of prestressed concrete prisms. Under the sponsorship of Federal Railroad Administration, Kansas State University (KSU) experimentally characterized the bond-slip behavior of various prestressing wires and strands commonly used in railroad concrete ties in the U.S. Based on the experimentally obtained bond-slip behaviors, Volpe Center has developed elastoplastic bond-slip models as a user-defined material (UMAT). In the bond-slip models, the required parameters were calibrated with the KSU untensioned pullout and pretensioned concrete prism testing results. In this study, effects of important geometric/mechanical parameters on the splitting/bursting performance of pretensioned concrete prisms are examined by incorporating a recently developed, unified bond model into the finite element (FE) analyses of pretensioned concrete prisms. The commercial FE software ABAQUS with the unified bond-slip UMAT is used. The important geometric/mechanical parameters considered herein are: reinforcement type, initial pretension force, concrete edge cover, reinforcement center-to-center spacing and concrete mechanical properties. The results show that releasing the prestressing wires at a concrete compressive strength of 3500 psi could cause significant splitting/bursting damages in the concrete prisms and a 0.5 in. concrete cover should be avoided due to the potential of premature splitting cracks. Finally, recommendations on developing qualification tests using pretensioned concrete prism results to prevent the splitting/bursting failure of concrete ties are made.

Supplemental Notes:

This paper was sponsored by TRB committee AR050 Standing Committee on Railroad Track Structure System Design.

Report/Paper Numbers:

18-00534

Language:

English

Authors:

Shin, Moochul
Yu, Hailing

Pagination:

5p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Uncontrolled Terms:

Bond-slip

Subject Areas:

Bridges and other structures; Design; Railroads

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-00534

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 10:08AM