バラ荷貨物の岸壁上載荷重の設計値に関する研究

抄録

In the design of port structures, it is important to decide loads rationally. When designing port structures by the reliability-based design method, it is necessary to evaluate probability distributions of loads. In this research, we focused on the surcharge by bulk cargos on a quaywall. Field observation about the surcharge was performed at the berth for bulk cargos of the Kisarazu port in Japan. The observation using two digital video cameras was conducted. An analysis was performed based on the video image and the data offered from some harbor transport companies. The probability distribution of surcharge was evaluated. It was found that the design value of surcharge by bulk cargo was 24.6kN/m² as dominating load and 34.4KN/m² as non-dominating load according to ISO2394. On the other hand, the design value was 37KN/m² as dominating load by the reliability analysis. The difference in the design value is derived from the difference in sensitivity factors and target reliability indices.