直立式防波堤可靠性分析  

Reliability Analysis of Vertical Breakwater

作　　者：李静静[1] 董胜[1] 张磊[2] 

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]中交水运规划设计院有限公司,北京100007

出　　处：《中国海洋大学学报（自然科学版）》2015年第7期125-130,共6页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(51279186)资助

摘　　要：防波堤一旦破坏,会严重影响港口的正常使用功能,准确计算防波堤的可靠度指标对港口工程意义重大。防波堤所受主要荷载为水平波浪力及波浪浮托力,计算可靠度应考虑两者的相关性。结合Gumbel-Houggard Copula函数与对数正态边缘分布构造二维的Copula分布可以很好地描述荷载间的相关性。本文以秦皇岛直立式防波堤为例,用二维Copula分布计算防波堤的可靠度,并与JC独立法、JC相关法进行了比较,结果显示:用Copula分布计算的结构可靠度指标远小于JC独立法计算结果,与JC相关法接近。Once a breakwater is damaged,the normal function of the port will be affected severely,how to precisely calculate the reliability of breakwater plays a key role to protect the whole port area.As main loads of the breakwater,the correlation of the horizontal wave force and the uplift wave force should be considered in the calculation of structural failure probability.Combining Gumbel-Houggard Copula function and lognormal marginal distribution,a bivariate Copula distribution can describe the correlation well.As an example,the reliability of some breakwater in Qinhuangdao is calculated by using bivariate Copula distribution,and compared with JC methods in the meantime.From the comparison it can be seen that the new results is more close to the results of the variable correlated JC method,and much lower than those of variable-independent JC method.

关 键 词：Gumbel-Houggard COPULA函数 对数正态分布 可靠度 直立式防波堤 水平波浪力 浮托力 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]