A Numerical Method for Computing Barge Impact Forces Based on Ultimate Strength of the Lashings between Barges

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. computation of. Several engineers 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. 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. 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 comer. Finally, the maximum force normal to the struck wall is calculated from the equations of motion and the yielding of the lashing.7

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2004
Accession Number
ADA427100

Entities

People

  • Jose R. Arroyo
  • Robert M. Ebeling

Organizations

  • Engineer Research and Development Center

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  • Air Platforms

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  • Accuracy
  • Computational Science
  • Computer Programs
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  • Computers
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  • Equations
  • Equations Of Motion
  • Linear Momentum
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Momentum
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  • Stress Strain Relations

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