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Unformatted text preview: n m Ri R R = (5-10) where Ri Bias Factor R m Measured Resistance R n Predicted (nominal) Resistance The biases for all history cases using the same design procedure are subsequently determined for the database and the values of mean, standard deviation and coefficient of 40 variance are then found. Equations 5-11, 5-12 and 5-13 are used for this purpose (Withiam et al., 1997). N Ri R = (5-11) ( 29 1 2--= N T Ri R (5-12) R R R COV = (5-13) where R Average Resistance Bias Factor N Number of Cases R Resistance Standard Deviation COV R Resistance Coefficient of Variance For calibrations of the methods that predict driven pile capacity, the values of the measured resistance (R m ) were obtained from in-situ load test employing the Davissons capacity. The nominal resistances (R n ) were obtained from the various dynamic equations under study (Chapter 3)....
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- Spring '11