EVALUASI KINERJA PILAR JEMBATAN LEMAH IRENG II BERDASARKAN PERFORMANCE BASED SEISMIC DESIGN

Lemah Ireng II Bridge is a type of box girder balance cantilever bridge located in Semarang Regency, Central Java, which was completed 2014. The renewal loading regulations 2016 consisted SNI 1725:2016 for standard load and 2833:2016 earthquake load. Changes resulted an increase the ground surface spectra value short period (Sds, T=0,2 second) longitudinal direction by 38.47% transverse 45.39% as result updating map response modification factor. To determine level performance against applicable based on pier structure parameters, Non-Linear Time History Analysis (NLTHA) method used. NLTHA uses seven deaggregated motion records aim to represent motions that occur at site. Parameter limits determined NCHRP Synthesis 440 Research Report 949. According results performance-based analysis, meets Fully Operational parameters drift, compressive strain concrete tensile steel reinforcement. At this performance, after suffers very little damage so no repairs are needed can function immediately earthquake.