Accession Number : ADA548303
Title : Dynamic Structural Flexible-Beam Response to a Moving Barge Train Impact Force Time-History Using Impact_Beam
Descriptive Note : Final rept.
Corporate Author : ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS INFORMATION TECHNOLOGY LAB
Personal Author(s) : Ebeling, Robert M ; Mohamed, Abdul N ; Arroyo, Jose R ; White, Barry C ; Strom, Ralph W ; Barker, Bruce C
Report Date : Aug 2011
Pagination or Media Count : 303
Abstract : To design simply-supported, flexible impact beams spanning between cells or bents for lock approach walls, a dynamic structural analysis of the beam under impact time-history loads for design- specific barge trains is required. At several locks, this flexible structural feature is the primary structural member resisting the glancing-blow impact event of a barge train as it aligns itself with a lock. This technical report describes an engineering methodology used to conduct this dynamic structural analysis and visualize the resulting deflections, moments, and shears. This engineering methodology is implemented with a PC-based FORTRAN program and visual modeler named Impact_Beam. The engineering formulation for Impact_Beam uses time-history force data that are scaled for design specific barge trains to perform a dynamic structural response analysis for either a single degree of freedom system or a modal timehistory analysis for the simply supported beam subjected to a impact load that is travelling along the beam. Time-history force data has been collected from the interpretation of the results from the 1997 full-scale barge train impact prototype experiments conducted at Old Lock and Dam 2 just north of Pittsburgh, PA, and of the 2008 full-scale barge train impact experiments conducted at Winfield Lock and Dam, Winfield, WV. This database of pulse time-history can be scaled for site specific design barge trains with approach angle and velocity using the companion software Impact_Force. It is also possible to use force time-histories from other impact simulation software (e.g., dBEAS). The engineering formulation for Impact_Beam is verified against the original Winfield experiments using modal time-history analysis and dBEAS simulations using single degree of freedom analysis.
Descriptors : *COMPUTER PROGRAMS , *FLEXIBLE STRUCTURES , *STRUCTURAL COMPONENTS , BARGES , BEAMS(STRUCTURAL) , COMPUTERIZED SIMULATION , DAMS , DATA BASES , DYNAMIC RESPONSE , FORMULATIONS , FORTRAN , HISTORY , IMPACT LOADS , IMPACT TESTS , LOCKS(WATERWAYS) , METHODOLOGY , REPORTS , SIMULATION , STRUCTURAL ANALYSIS , STRUCTURAL RESPONSE , TRAVELING WAVES , VELOCITY
Subject Categories : Computer Programming and Software
Structural Engineering and Building Technology
Distribution Statement : APPROVED FOR PUBLIC RELEASE