STUDIES ON OPTIMIZATION OF CABLE PRESTRESSES OF CABLE STAYED BRIDGES

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  • 斜張橋ケーブルの最適プレストレス量決定に関する研究
  • シャチョウキョウ ケーブル ノ サイテキ プレストレスリョウ ケッテイ ニ カ

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The cable stayed bridge can be designed economically by introducing the cable prestresses. It is the most important and difficult problem to determine the optimum cable prestresses in the design of cable stayed bridges. However, there are few studies on the optimum cable prestresses. In this study, an attempt is made to determine the optimum cable prestresses based on the strain energy criterion. The validity of the strain energy criterion on the optimum cable prestresses is proved by simple models. This proposed method is applied to some actual cable stayed bridges. The results show that the proposed strain energy criterion is very useful to determine the optimum cable prestresses even in the case of multi-cable types.

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