A method of reliability analysis is utilized to calibrate the live load factor based on the expected life-time of a cast-in-place reinforced concrete (RC) structure. The probabilistic parameters of live load are computed for different life-times and live load factors are then suggested so that the same level of safety is maintained for any given life-span. An example is presented that demonstrates how modified live load factors can be conducive to making decision on the necessity and the level of the required strengthening in a concrete structure in need of repair.
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