STRUCTURAL BEHAVIOR OF WIND FRAME TRUSSES IN BRIDGES AFTER CRASHES USING LISA V8 FEA
Keywords:
bridges, crashes, LISA, simulation, stressAbstract
A trailer towing large machinery struck the Pondok Gong truss bridge in Samboja, East Kalimantan, at 80 km/h, seriously damaging the 60-meter steel structure. By utilizing Finite Element Analysis (FEA) with LISA v.8, the research seeks to close the knowledge gap about the post-collision behavior of the bridge elements. With an emphasis on the wind bar frame and bracing that underwent ripping and distortion, the study simulates the impact to assess stress distribution and deformation patterns in the impacted structural components. The impact stress on the wind bracing elements was found to be 567,066 kN/m² in the simulation, which is far more than the permitted stress of 246,670 kN/m² for the steel. This discovery calls attention to significant structural flaws and demands quick response. It is advised to reinforce the impacted areas to stop further failures and replace the damaged sections with new steel components made to tolerate higher loads. Maintaining the structural integrity and safety of the bridge during the replacement process requires constant observation and monitoring.
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