DTIC ADA069896: Failure of Underground Hardened Structures pdf

DTIC ADA069896: Failure of Underground Hardened Structures

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The major objective of this study was to apply plastic hinge response to buried reinforced concrete beams and plates. Using the plastic hinge response, of both stationary and moving hinges, equations of motion were derived for beams and plates using time and spatially varying loading functions. The spatial variations were evaluated in closed form and the time variations were evaluated numerically. The solution of the equations of motion were coded in a rather lengthy but efficient computer model with running times on the order of a second for each case. Inconsistencies in predicting pressure loadings in soil, neglecting elastic response, variations in structural designs, experimental errors, etc. could produce as much as plus or – 50% variation when comparing analyses to experiments. However, comparison of analyses to limited experimental data showed reasonable agreement. Experiments verify the existence of plastic hinge response for both internal stationary and moving hinges

• Creator/s: Defense Technical Information Center
• Date: 4/30/1979
• Year: 1979
• Book Topics/Themes: DTIC Archive, Ross, C A, FLORIDA UNIV EGLIN AFB GRADUATE ENGINEERING CENTER, *MATHEMATICAL ANALYSIS, *BLAST LOADS, *HARDENED STRUCTURES, *UNDERGROUND STRUCTURES, COMPUTERIZED SIMULATION, SPATIAL DISTRIBUTION, EQUATIONS OF MOTION, BEAMS(STRUCTURAL), PLATES, PLASTIC PROPERTIES, REINFORCED CONCRETE, HINGES

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