橋梁の耐震(2)

[I-287] Comparison in Seismic Retrofit Design of Cable Stayed Bridges of Different Sizes

〇kazunori yamaguchi¹, takao kaneda¹, hirayama yasuyuki¹ (1.Honshu-Shikoku Bridge Expressway Co.,Ltd)

Keywords:Seismic performance verification, Seismic retrofit, Cable stayed bridge, Honshu-Shikoku expressway

There are three cable stayed bridges in Nishi-Seto Expressway, the westernmost route of Honshu-Shikoku Expressway; Shin-Onomichi Bridge , Ikuchi Bridge , and Tatara Bridge. And seismic retrofit design of these bridges were completed. Cable stayed bridge easily sways in longitudinal direction, and key of seismic retrofit design is how to reduce this displacement which varies according to the size and structural characteristuc of the bridge. In this paper, comparison of seismic design of three cable stayed bridges with different size is presented.