2024 Volume 80 Issue 13 Article ID: 23-13154
In the 1995 Southern Hyogo Prefecture Earthquake, many columnar attached structures, including TV poles for installing traffic flow monitoring cameras, suffered damage such as overturning. However, TV poles are elastically designed against dead load, live load and wind load, and the seismic load is not considered. In this study, as basic data for establishing a seismic performance assessment method for columnar attached structures and considering countermeasures, the damage mechanism was analyzed based on the reproduction analysis of a TV pole that was damaged by the Southern Hyogo Prefecture Earthquake. As a result, the bending moment at the base of the TV pole exceeded the design allowable value and it was found that the damage was consistent with the damage situation where the TV pole fell. Furthermore, as the upgrading of the reproduction analysis, analyses of the influence of plasticity of steel piers and ground uncertainty on the response of TV poles were analyzed. As a result, it was found that the response of the TV pole tends to increase when resonance between the bridge pier and the TV pole is likely to occur.
