Objective was to provide full scale data on the response of reinforced concrete containment walls to impact and penetration by turbine-produced missiles. Four full scale experiments were conducted during the period from December 19, 1979 to June 12, 1980. This paper describes the results of the experiments. Missile velocity was varied from 90 to 132 m/s; missile mass, from 1476 to 2100 kg; missile attitude, to the two extremes of piercing and blunt; and panel liner thickness, from 0 (no liner) to 9.5 mm thickness. The target thickness, reinforcement, and concrete strength were the same in all experiments. Penetration depths into the 1.37 m thick panels ranged from 33 cm for the blunt impact of the 1476 kg missile at 92 m/s to 65 cm for the piercing impact of the 2100 kg missile at 115 m/s. The strongest correlation for penetration was with kinetic energy. Predictions using the modified NDRC penetration formula were moderately conservative, agreeing with measured values to within about 30%. Perforation and scabbing predictions were much less accurate, being extremely conservative. Backface cracking varied greatly from test to test. With the liner absent much superficial cracking was present on the rear face, while the liner seemed to inhibit such cracking. Impact with a sharp missile attitude caused more severe backface cracking than with the blunt attitude. Intensity of shear plug cracking correlated strongly with missile momentum for the same missile attitude. Rear face kinematic quantities showed displacements in excess of 6 cm and velocities in excess of 7 m/s. Attempts to analytically model the impact process have met with limited success using a finite difference code (CSQII) and no success in using finite element codes (NONSAP-C, MARC). 12 figures, 1 table. (ERA citation 81:025538)
Results of Full-Scale Turbine Missile Concrete Impact Experiments
1981
9 pages
Report
Keine Angabe
Englisch
Combined fatigue experiments on full scale turbine components
Emerald Group Publishing | 2013
|Combined fatigue experiments on full scale turbine components
Online Contents | 2013
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