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Title: Modernization and structural evaluation of the improved Overhead Cable System
Authors: Trim, M. W. (Michael Wesley), 1981-
Murray, Matthew P.
Crane, C. Kennan.
Keywords: Military bridges
Stream crossing
Stream crossing, Military
Structural analysis (Engineering)
Transportation, Military
Improved Ribbon Bridge
Anchorage (Structural engineering)
Military bridges--Cables
Bridge Supplemental Set
Overhead Cable System
Publisher: Geotechnical and Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/GSL TR-21-4
Abstract: A modernized Overhead Cable System prototype for a 689 ft (210 m) Improved Ribbon Bridge crossing was designed, assembled, and structurally tested. Two independent structural tests were executed, i.e., a component-level compression test of the BSS tower was performed to determine its load capacity and failure mode; and a system-level ‘dry’ test of the improved OCS prototype was conducted to determine the limit state and failure mode of the entire OCS. In the component-level compression test of the BSS tower, the compressive capacity was determined to be 102 kips, and the failure mode was localized buckling in the legs of the tower section. During system-level testing, the prototype performed well up to 40.5 kips of simulated drag load, which corresponds to a uniformly distributed current velocity of 10.7 ft/s. If a more realistic, less conservative parabolic velocity distribution is assumed instead, the drag load for an 11 ft/s current is 21.1 kips. Under this assumption, the improved OCS prototype has a factor of safety of 1.9, based on a 689-ft crossing and 11-ft/s current. The OCS failed when one of the tower guy wires pulled out of the ground, causing the tower to overturn.
Description: Technical Report
Gov't Doc #: ERDC/GSL TR-21-4
Rights: Approved for Public Release; Distribution is Unlimited
Size: 98 pages / 22.95 MB
Types of Materials: PDF
Appears in Collections:Technical Report

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