Seismic Retrofit of a Multispan Prestressed Concrete Girder Bridge with Friction Pendulum Devices

Table 2

Parameters of the elastic response spectra, in terms of acceleration for the LS and CP Limit States.

Parameter	LS	CP
Probability of exceedance	0.10	0.05
Return period (years)	712	1462
Peak ground acceleration	0.147	0.176
Dynamic amplification factor	2.741	2.830
Transition period (sec)	0.651	0.687