Dynamic site response evaluation of the Port City of Aqaba (Jordan) employing the equivalent linear method

As part of an ongoing research program to develop local seismic engineering ground motion parameters for implementation in the Jordanian Seismic Build ing Code, a practical contribution is made to determine the local site coef ficient (S) for the Port City of Aqaba, southern Jordan. Employing probabil istic peak ground acceleration estimates using FRISK, the overall dynamic s ite response design spectrum is obtained through the calculated response sp ectrum based on selected soil-rock column profiles applying SKAKE91. The pa rabolic shape of the S coefficient design spectrum is given by the followin g relationships: S=1.06 for Tb/Ts less than or equal to 0.56 S = - 0.81 + 4.68(T-b/T-s) - 2.38(T-b/T-s)(2) for 0.56 < T-b/T-s less than or equal to 1.43 S = 1.00 for T-b/T-s > 1.43 where T-b and T-s are the structural and site response design periods (in s econds), respectively.