中国港湾建设

1/4圆弧面胸墙沉箱防波堤可靠度分项系数研究

作者：郄禄文秦一楠丁宏卿

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出版年,卷(期):页码：2011,32(4):4-9

摘要：

1/4 圆弧面胸墙沉箱防波堤是一种适合于深水港的新型防波堤。文章首先利用修正的合田良实波浪力公式
计算防波堤堤身波浪力分布特性；考虑作用在防波堤堤身的波浪力之间、波浪力矩之间相关性，采用考虑相关变量
的可靠性分析方法，基于工程海域实测波浪数据，针对不同工况下的防波堤，确定该类型结构的可靠指标、失效概
率。对应于我国现行安全度水平，提出各荷载的分项系数建议值，以及深水1/4 圆弧面胸墙沉箱防波堤的抗滑移、
抗倾覆破坏的设计表达式。为其结构设计提供理论依据。

A caisson breakwater with quarter-circular wave-walls (QCB) is a new-type breakwater. In this paper, the modified
Goda formula was first used to calculate wave forces acting on the QCB. Secondly，the reliability method with correlated
variables was adopted to analyze the QCB, considering the high correlation between wave forces or moments on a QCB. Based on
the observed wave data at working site，the reliability index and failure probability of QCB in different conditions were obtained.
Finally，corresponding to current degree of safety，the partial coefficients of wave loadings were proposed. And the design
expressions of QCB for anti-sliding and anti-overturning were presented. It provides theoretical basis for structural designs.

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