COMPARISON OF BRIDGE PERFORMANCE EVALUATION USING THE STRAIN APPROACH (NCHRP 440 AND 949) AND ROTATION OF ELEMENTS APPROACH (ASCE 41-17)

• Main Author: Eka Putra, Novrialdi
• Format: Theses
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/79175
• Institution: Institut Teknologi Bandung

Bridge planning and loading standards in Indonesia have undergone several changes, especially in the aspect of earthquake load planning, with the latest changes in 2016, namely the Indonesian National Standard (SNI) 2833:2016 concerning bridge planning against earthquake loads and SNI 1725:2016 concerning bridge loading. This study will take a case study of a bridge in North Sulawesi which has a concrete I girder bridge construction with 6 spans with 5 piers (P1, P2, P3, P4 and P5) and 2 abutments (A1 and A2). The pier structure on this bridge in the longitudinal direction is a single pier structure and in the transverse direction it is a portal pier structure with 2 types of supports on the girders, namely simple span supports and continuous supports. The bridge was modeled as a whole with loading characteristics for bridges based on SNI 1725:2016 and bridge planning for earthquake loads based on SNI 2833:2016, after which an elastic analysis of the piers (P1, P2, P3, P4 and P5) was carried out to determine the cross-sectional capacity of the piers. The Federal Highway Administration's (FHWA) requires bridges to be tested based on 2 earthquake levels, namely the 1000 year earthquake level (maximum earthquake load) and the 100 year earthquake level (frequency earthquake load). Next, bridge performance is calculated using 2 approaches, namely the strain approach (National Cooperative Highway Research Program/NCHRP 440 and 949) and the rotation approach (American Society of Civil Engineers/ASCE 41-17). The assessment of the existing bridge was carried out by evaluating its performance using the non-linear time history analysis (NLTHA) method. This study will compare the strain approach (NCHRP 440 and 949) and the rotation approach (American Society of Civil Engineers/ASCE 41-17) to earthquake loads. 1000 Years and 100 Years which have been scaled/matched to 3 pieces of ground motion, namely shallow crustal, benioff and megathrust.