United States Department of Transportation
Finite Element Models for the Single-Web Sheave Design for the Shippingsport Vertical Lift Bridge
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1997-08-01
File Language:
English
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Edition:Final Report, August 1997
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Abstract:Finite element models for the Shippingport Vertical Lift Bridge over the Illinois River at LaSalle were created using a single-web design for the sheaves. The models used both linear and sinusoidal load distributions along the periphery of the sheave. A model of the cable tray was also created. Using an analysis developed at the University of Illinois, 4/5P downward loading and 1/5P per side was used for loading each semi-circular channel. The models were additionally rotated 18° for maximum loading. Peak tensile stresses generated in the cable tray were at 7.6 ksi, and the peak tensile web stress was 3.3 ksi. A hub analysis was also conducted using internal pressures of 8,000 psi and 4,000 psi generated by the FN3 shrink required by the AASHTO Movable Bridge Code. Peak stresses in the forged ASTM A668 Class Chub were 23.1 ksi at 8,000 psi pressure, whereas it was only 12.2 ksi peak tensile stress at 4,000 psi.
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[PDF - 4.42 MB] -
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Main Document Checksum:urn:sha-512:9c8b826fb5a3d80bc51d2c1ba5515d576c70b3818c65003c3b16cc541c7f0f1a4beaa27b4abc7f7eab62e9a23e0a389e283db4497894da964a2f16e233533cc0
File Language:
English
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