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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a548303.pdf


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