Impact of Imperfections, Residual Stresses, Erection Fit-Up and Distortion on Curved Steel Bridge Service Life

Hammett, Stephen T; Moghadam, Sayed Mohamad Jalali; Davidson, James S.

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Impact of Imperfections, Residual Stresses, Erection Fit-Up and Distortion on Curved Steel Bridge Service Life

2024-09-01
By Hammett, Stephen T ; Moghadam, Sayed Mohamad Jalali ; Davidson, James S.

File Language:

English

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Creators:

Hammett, Stephen T ; Moghadam, Sayed Mohamad Jalali ; Davidson, James S.
Corporate Creators:

Auburn University. Highway Research Center
Corporate Contributors:

Alabama. Department of Transportation
Subject/TRT Terms:
Resource Type:

Tech Report
Geographical Coverage:

Alabama ; United States
Corporate Publisher:

Auburn University. Highway Research Center
Abstract:

Curved steel girders experience large deflection and rotations during construction and service that can intensify the web breathing effect. In addition, the curvature-induced lateral forces in slender curved webs can lead to critical web boundary stresses that do not typically occur in straight bridges. These distortion mechanisms are amplified by millions of traffic load cycles over the life of the bridge, and therefore, the goals of this research were to investigate the web behavior of composite curved steel bridges and define design methodology that could be applied to the fatigue limit state. The web stress development mechanisms from construction to service were addressed through parametric finite element modeling of a horizontally curved composite bridge. Three regions of high bending, high shear, and high bend and shear locations were studied. Also, a novel LiDAR structural monitoring (LSM) method was investigated and used to survey horizontally curved steel girders during construction.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/78159/dot_78159_DS1.pdf
File Type:

[PDF - 8.20 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:611b9a9d04ebabf50a4b4c0d45f2995c83b3c73e401b00d047e222108a37bd1ae34d1bec490e940dfc109b749d055282be61aae233e61701684888c1287d3782

File Language:

English

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