81_HWKTTE 4004c - 71 rise time from 2 L/c to exclude any...

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71 rise time from 2 L/c to exclude any reflections from the pile tip of the initial input wave. The assumption of this method is that the skin friction of the bottom one rise length is the same as the one additional rise time length above. Based on that assumption, the skin resistance is the separation of force and velocity at point “a” added to the increase in resistance from point “b” to point “a” as stated below. (29 (29 (29 [] b b a a a a ZV F ZV F ZV F SFT - - - + - = (7-1) Once the estimate of dynamic skin friction is determined using the GRL procedure, as described above, the static tip and skin capacity were calculated according to the following methodology (Method 1). First, the total dynamic capacity, RTL, is determined using the Case solution for dynamic capacity (Equation 3-14 for J c equals 0). Then, knowing the total dynamic capacity and the GRL estimate of skin dynamic capacity, the dynamic tip capacity, TT , could be computed. SFT
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81_HWKTTE 4004c - 71 rise time from 2 L/c to exclude any...

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