EVALUASI STRUKTUR BAWAH JEMBATAN KERETA API RANGKA BAJA TIPE WARREN BENTANG 42 M BERDASARKAN PETA GEMPA 2017
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Indonesia is a country located in the Ring of Fire and the Asia and Australia Continental Plate meeting. The area is a volcano-spread pathway and active tectonic movements increasing the intensity of earthquakes. Increasing the intensity of earthquakes in Indonesia makes the country vulnerable to disasters. Losses due to earthquakes are enormous. One of the anticipations was as a matter of measuring the load factor in construction planning. The 2017 earthquake map became one of the references for building buildings and the building. Bridges are the infrastructure to help transport activities and human mobilization. One component of the lower structure of the bridge is abutment. The research aims to demonstrate the safety of the earthquake with the influence of 2017 earthquakes on structures already built. This research is an analysis by replacing the earthquake burden of the earthquake load planning that has been used with the new earthquake load. Earthquake map based on basic rock acceleration with a probability of 7% in 75 years worth 0,3 g to 0,4 g. Results obtained amplification factor value of 1,24 when 0,2 seconds and 1,8 when 1 second. Using the Mononobe-Okabe formula obtained a horizontal earthquake load value of 29,208 tonnes. Stability value of against shifting, overturning and bearing capacity are the successful overthrow of 8,527, 5,729 and 0,55 of the reference factor 3.