福田 健 (Ken FUKUDA)
Since the accident of the I-35W Mississippi river bridge in 2007, the importance of redundancy of bridges has been recognized. After the accident, many studies on redundancy by linear or nonlinear numerical analyses with frame elements have been conducted. However, numerical model with frame elements is not appropriate for redundancy evaluation involving ultimate state analysis. In this paper, a series of redundancy analyses of a typical steel truss bridge are conducted by numerical models with plate elements for panel points. Based on the results, appropriate model for redundancy analysis and structural details that ensure redundancy are proposed.
Key Words : redundancy, steel truss bridge, panel point, nonlinear finite element analysis