RISK ANALYSIS OF THE BEHAVIOR OF STEEL ARCH BRIDGE STRUCTURES ON MELAHAM BRIDGE

Risk analysis is a systematic process with the primary goal of providing risk information thereby reducing itsimpact and not even occurring risk. This development is an effort of the Mahakam Ulu Regency Government toimprove accessibility between regions and to facilitate transportation and economic wheels in Mahakam UluRegency. Many risks include the unreleased bridge access, the floor of the bridge that has not yet been pavedand the pedestrian access to the bridge. There are 4 major components to risk analysis, namely riskidentification, risk analysis, risk response, risk monitoring. In risk analysis, there are 32 variables, consisting of14 low risk variables, 1 medium risk variable, and 17 high risk variables. Risk management is carried out at thebottom of the bridge, top of the bridge, and complement of the bridge. Other countermeasures include theconstruction of bridge elements such as Kerb/Gabions, Abutment, Retaining Wall, Traffic Sign, Earth Hoard(oprit), Level of Bridge, Sidewalk, Pedestrian, Etc. From the results of the correlation testing between variablesand the method of linear regression multiplied in risk variables, it was concluded that the hypothesis is a stronginfluence between X variables (cause and impact variables) simultaneously on Y variables (risk variables). Thehigh-risk category between 0.24 and 0.72 consists of the risk of erosion around the local scouring of the bridge,the lowest risk category of 0.01 - 0.05 consisting of the bridge above.