Evaluation of the need for longitudinal median joints in bridge decks on dual structures.

Phares, Brent M.; Greimann, Lowell; Liu, Zhengyu; Iowa State University. Bridge Engineering Center

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Evaluation of the need for longitudinal median joints in bridge decks on dual structures.

2015-09-01
By Phares, Brent M. ; Greimann, Lowell ; Liu, Zhengyu

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Creators:

Phares, Brent M. ; Greimann, Lowell ; Liu, Zhengyu

Phares, Brent M. ; Greimann, Lowell ; Liu, Zhengyu Less -
Corporate Creators:

Iowa State University. Bridge Engineering Center
Corporate Contributors:

Iowa. Dept. of Transportation ; Iowa. Highway Research Board

Iowa. Dept. of Transportation ; Iowa. Highway Research Board Less -
Subject/TRT Terms:

[+]

Bridge Abutments Bridge Decks Evaluation Finite Element Method Load Tests Longitudinal Cracking Longitudinal Joints
Publication/ Report Number:

IHRB Project TR-661 ; InTrans Project 13-470

IHRB Project TR-661 ; InTrans Project 13-470 Less -
Resource Type:

Tech Report
Geographical Coverage:

Iowa
Corporate Publisher:

Iowa State University. Institute for Transportation
Abstract:

The primary objective of this project was to determine the effect of bridge width on deck cracking in bridges. Other parameters,

such as bridge skew, girder spacing and type, abutment type, pier type, and number of bridge spans, were also studied. To

achieve the above objectives, one bridge was selected for live-load and long-term testing. The data obtained from both field

tests were used to calibrate a three-dimensional (3D) finite element model (FEM). Three different types of loading—live

loading, thermal loading, and shrinkage loading—were applied. The predicted crack pattern from the FEM was compared to

the crack pattern from bridge inspection results. A parametric study was conducted using the calibrated FEM.

The general conclusions/recommendations are as follows:

 Longitudinal and diagonal cracking in the deck near the abutment on an integral abutment bridge is due to the temperature

differences between the abutment and the deck. Although not likely to induce cracking, shrinkage of the deck concrete may

further exacerbate cracks developed from thermal effects.

 Based upon a limited review of bridges in the Iowa DOT inventory, it appears that, regardless of bridge width, longitudinal

and diagonal cracks are prevalent in integral abutment bridges but not in bridges with stub abutments.

 The parametric study results show that bridge width and skew have minimal effect on the strain in the deck bridge resulting

from restrained thermal expansion.

 Pier type, girder type, girder spacing, and number of spans also appear to have no influence on the level of restrained

thermal expansion strain in the deck near the abutment.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

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urn:sha256:e8c5f519fad6967955682fb5e638f2b8ddaa62e99212551d6bfe992e911ac4bc
Download URL:

https://rosap.ntl.bts.gov/view/dot/29406/dot_29406_DS1.pdf
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Evaluation of the need for longitudinal median joints in bridge decks on dual structures.

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