Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/10963
Title: A numerical method for computing barge impact forces based on ultimate strength of the lashings between barges
Authors: University of Puerto Rico (Mayagüez Campus). Department of General Engineering
Navigation Systems Research Program (U.S.)
Arroyo, José Ramón
Ebeling, Robert M., 1954-
Keywords: Barge train
Failure mechanism of barge train
Impact
Kinetic coefficient of friction
Lashing limit state
Rigid wall
Locks
Hydraulic structures
Force
Energy
Publisher: Information Technology Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/ITL TR ; 04-2.
Description: Technical Report
Abstract: In 1993 Headquarters, U.S. Army Corps of Engineers, issued the first formal Corps-wide analysis procedure providing guidance for analyzing the effects of barge impact loading on navigation structures. According to the ETL 1110-2-338 engineering procedure, the magnitude of the impact forces generated by a particular collision event is dependent on the mass including hydrodynamic added mass of the barge train, the approach velocity, the approach angle, the barge train moment of inertia, damage sustained by the barge structure, and friction between the barge and the wall. Two significant concerns have been raised since the release of the ETL 1110-2-338 procedure: (1.) A key aspect of the ETL 1110-2-338 engineering formulation is computation of collision energy dissipated in nonrecoverable, plastic hull deformation of (i.e., damage to) the corner of the barge where impact with the wall occurs. However, the majority of the impacts made by barge trains transiting Corps locks do not result in damage to the barge structure nor damage to the walls. (2.) In addition, several engineers who have used the ETL 1110-2-338 engineering procedure have questioned the accuracy of the computed results. In 2003, the U.S. Army Engineer Research and Development Center issued the report ERDC/ITL TR-03-3, “Analysis of Impact Loads from Full-Scale, Low-Velocity, Controlled Barge Impact Experiments, December 1998,” by Arroyo, Ebeling, and Barker. This report addresses the interpretation of 8 of the 44 December 1998 full-scale, low-velocity, controlled-impact, barge train impact experiments conducted at the decommissioned Gallipolis Lock at Robert C. Byrd Lock and Dam, Gallipolis Ferry, WV. According to ERDC/ITL TR-03-3, an easy-to-use empirical correlation is derived that reports the maximum impact force (normal to the wall) as a function of the linear momentum normal to the wall (immediately prior to impact), using the results from the impact forces measured during these full-scale impact experiments. This new empirical correlation will be used for impacts that do not involve damage during impact to either the corner barge of a barge train or to the wall. An alternate empirical correlation is given for the maximum impact force (normal to the wall) as a function of the kinetic energy normal to the wall (immediately prior to impact). However, ERDC/ITL TR-03-3 did not present the limit value of the force normal to the wall based on the empirical correlations. The present report presents the analysis of a barge train impacting a rigid wall. The limit value of the force normal to the wall is based on the yield of the lashing. That is, predefined failure planes are analyzed and based on the yield of the lashing, a maximum force normal to the wall is calculated. The three failure mechanisms studied are longitudinal, transverse, and corner. Finally, the maximum force normal to the struck wall is calculated from the equations of motion and the yielding of the lashing.
Rights: Approved for public release; distribution is unlimited.
URI: http://hdl.handle.net/11681/10963
Appears in Collections:Technical Report

Files in This Item:
File Description SizeFormat 
12978.pdf10.13 MBAdobe PDFThumbnail
View/Open