... ksi (= 571/2) and the diameter of the column being D = 6 ft results in a moment of inertia Ip = 63.62 ft4 where (=Ir4/4). ... For transverse seismic motion, the bent is assumed to be fixed at the base of the effective pile depth and free on the top. ... The AASHTO LRFD specifications (Figure 3.10.2-2 of the manual) provide maps that give seismic acceleration for different regions of the United States.
|Title||:||Design of Highway Bridges for Extreme Events|
|Author||:||Michel Ghosn, Fred Moses, Jian Wang|
|Publisher||:||Transportation Research Board - 2003-01-01|