Author(s): M. Tirindelli; V. Shepsis; G. Cuomo; J. Fu
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Keywords: No Keywords
Abstract: Failure of coastal bridges during recent hurricanes (Ivan, Wilma, Katrina and others) has required re-evaluation of engineering criteria and methodologies for the design of suspended-deck structures in hurricanes-prone coastal areas. This paper summarizes the work conducted by Coast & Harbor Engineering, Inc. (CHE) for Louisiana Department of Transportation and Development (LADOTD) to identify an appropriate methodology and develop the required technical information on wave loads for the Chef Menteur Bridge design. The paper also presents a comparison analysis of wave loads on the bridge obtained using different engineering methods including two different versions of AASHTO Guide Specifications. Computed wave loads consisted of horizontal and uplift forces and moments about the trailing edge at all bridge span locations. Based on comparative analysis of all used methods and understanding of uncertainties with design storm input parameters, it was recommended to derive design wave forces and moments based on a combination of all of the methods considered.
Year: 2009