Finite element analysis of deep wide-flanged pre-stressed girders to understand and control end cracking.

Oliva, Michael G.; Okumus, Pinar; University of Wisconsin--Madison. Department of Civil and Environmental Engineering

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Finite element analysis of deep wide-flanged pre-stressed girders to understand and control end cracking.

2011-06-01
By Oliva, Michael G. ; Okumus, Pinar

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English

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Alternative Title:

Finite element analysis of deep wide-flanged pre-stressed girders : draft final report
Creators:

Oliva, Michael G. ; Okumus, Pinar

Oliva, Michael G. ; Okumus, Pinar Less -
Corporate Creators:

University of Wisconsin--Madison. Department of Civil and Environmental Engineering
Corporate Contributors:

Wisconsin. Dept. of Transportation. Research Coordination Section
Subject/TRT Terms:

[+]

Concrete Bridges Concrete Bridges--Cracking Cracking Girders Girders--Testing Prestressed Concrete Prestressed Concrete Bridges Testing
Publication/ Report Number:

WHRP 11-06
Resource Type:

Tech Report
Geographical Coverage:

Wisconsin
Edition:

Covered final report; 2009-2011.
Corporate Publisher:

Wisconsin Highway Research Program
Abstract:

Hundreds of prestressed concrete girders are used each year for building bridges in Wisconsin.

The prestress transfer from the prestressing strands to concrete takes place at the girder ends.

Characteristic cracks form in this end region during or immediately after detensioning. Potential solutions to

control end cracking were examined via finite element models and the impact of each solution on cracking

was evaluated. Modifications to reinforcement bar size, debonding ratios, strand cutting sequence and use

of draped strand patterns were simulated by the models. The results from different analyses were compared

to quantify the success of each method in reducing strains causing girder end cracks. The tension strains

leading to cracks of all types were responsive to debonding some of the bottom flange prestressing strands.

Bottom flange cracking can be prevented by methodically debonding exterior strands, keeping the draped

strands bonded, and evenly distributing the remaining bonded strands over the bottom flange.
Format:

PDF
Funding:

WisDOT SPR# 0092-10-12
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:166e0b8804e35ffbaadbd795778f5255865702145469f8b5f2d544b04e9725b9
Download URL:

https://rosap.ntl.bts.gov/view/dot/23563/dot_23563_DS1.pdf
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Finite element analysis of deep wide-flanged pre-stressed girders to understand and control end cracking.

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