矩形开孔沉箱防波堤可靠性分析  

Reliability Analysis for Vertical Breakwater of Perforated Rectangular Caissons

作　　者：张鑫 姜逢源 董胜[3] Zhang Xin;Jiang Fengyuan;Dong Sheng(China Three Gorges Renewables(Group)Company Limited,Beijing 101100,China;College of Marine Science and Technology,China University of Geosciences,Wuhan 430074,China;College of Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国三峡新能源(集团)股份有限公司,北京101100 [2]中国地质大学(武汉)海洋学院,湖北武汉430074 [3]中国海洋大学工程学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2023年第7期137-146,共10页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(52171284)资助。

摘　　要：为研究矩形开孔沉箱防波堤的可靠性,本文提出了一种新的直立式防波堤结构可靠性计算方法,考虑波高同周期的相关性,将波高、周期和抗力作为随机变量处理,构造隐式功能函数,采用直接抽样法生成随机样本进行模拟,作为中间变量的波浪荷载不做统计分析处理,根据功能函数的响应直接判断是否滑移或倾覆失效,计算失效概率和可靠指标。计算结果表明:新的计算方法与传统直接抽样法相比结果数值非常接近,验证了新方法的有效性;同传统JC法相比,新方法相对保守。本计算方法在波浪要素资料充足时可为矩形开孔沉箱防波堤的设计提供参考。In order to study the reliability of perforated rectangular caissons breakwater,a new method is proposed,a new method is proposed to analyze breakwater reliability,in which marine environmental elements are regarded as random variables in the limit state equation and the environmental loadings are intermediate variables which need not be taken statistical analysis.According to the response of the limit equation to determine whether a breakwater failure,then failure probability and reliability index would be obtained by calculation.The effectiveness of the new method is verified by comparison between traditional and the new method’s results of a sample.The new method is relative conservation compared with traditional JC method.This method can be used as a reference for the design of perforated rectangular caisson breakwater when wave elements are sufficient.

关 键 词：矩形开孔沉箱 防波堤 波浪 抗滑 抗倾 可靠性 

分 类 号：U656.2[交通运输工程—港口、海岸及近海工程]