Flat Slab Bridge Model for Permit Load Analysis

Garmestani, Golpar; Wolert, Patryk J.; Kolodziejczyk, Marek K.; Stallings, J. Michael; Nowak, Andrzej S.; Auburn University. Highway Research Center

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Flat Slab Bridge Model for Permit Load Analysis

2017-02-02
By Garmestani, Golpar ; Wolert, Patryk J. ; Kolodziejczyk, Marek K. ; ...

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English

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Details:

Creators:

Garmestani, Golpar ; Wolert, Patryk J. ; Kolodziejczyk, Marek K. ; Stallings, J. Michael ; Nowak, Andrzej S.

Garmestani, Golpar ; Wolert, Patryk J. ; Kolodziejczyk, Marek K. ; Stallings, J. Michael ; Nowak, Andrzej S. Less -
Corporate Creators:

Auburn University. Highway Research Center
Corporate Contributors:

Alabama. Dept. of Transportation
Subject/TRT Terms:

[+]

Bridge Decks Bridge Design Design Load Slab Bridge Models Slab Bridges
Resource Type:

Tech Report
Geographical Coverage:

Alabama ; United States

Alabama ; United States Less -
Corporate Publisher:

Auburn University. Highway Research Center
Abstract:

ALDOT has an eleven-span flat slab concrete bridge over Barnes Slough and Jenkins Creek on the northbound side of US Highway 82/231 that was built in 1915 for which there are no construction drawings or other available data. This bridge is referred to as “Barnes Slough Bridge”. The goals of this research are to define the capacity of Barnes Slough Bridge, rate the bridge, and provide a permit load model that can be included in the AASHTOWare software. ALDOT can then use this model to provide permits for non-standard trucks to travel over this bridge. The design methods from early 1900s were reviewed to identify the possible methods used in the original design of this bridge. Field measurements were taken using specialized equipment to assess the dimensions including span length, width, location and size of reinforcement, thickness of the slab, thickness of concrete cover and compressive strength of concrete. The collected data were analyzed and treated as input data to determine a preliminary load carrying capacity of the slab by AASHTOWare. An advanced finite element method program ABAQUS was used to develop a 3-D model of the slab. A sensitivity analysis served as a basis for identifying the most important parameters. The behavior of the bridge slab was then verified by load test, with the load applied using one and two 85-kip 3-axle trucks. The load test results were used to further improve the finite element model and in particular, to develop an improved value for the effective slab width. Proposed newly developed adjustments in the selection of input data in AASHTOWare result in a more rational evaluation and rating of the considered bridge.
Format:

PDF
Funding:

ALDOT Project 930-889
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:f2f1cf4ae752d2be03e0c040b6e356f2c7514aa27c83ae536a2022675afabf59
Download URL:

https://rosap.ntl.bts.gov/view/dot/36777/dot_36777_DS1.pdf
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Flat Slab Bridge Model for Permit Load Analysis

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