A Structural Evaluation of Rapid Methods of Backfilling for Bomb Damage Repair -Phase II.

摘要

An analytical model for evaluating the performance of repair systems for bomb-damaged runways is presented. This model consists of a finite element computer code capable of predicting the response of a repaired crater to an applied single wheel load, placed at the center of the repaired surface. Variables investigated during development of the analytical model include different element meshes, number of load steps, material stiffnesses and tension cutoff levels. Background information dealing with application of the model and generation of its input is included. Verification of this prediction technique is presented, based upon experimental testing of repaired model craters and repaired prototype 750-pound bomb craters. The prototype crater was repaired using the procedure recommended in Air Force Manual 93-2. The analytical model is shown to give valid predictions of the repair system response as long as reasonable attention is directed toward generation of input information.