基于性能的船撞桥设计模糊决策初探
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摘要
世界各地经常发生船舶与桥梁相撞的事故。这些事故不仅造成了较大人员伤亡,而且还造成了巨大经济损失。我国在长江等航运繁忙河流上计划修建大量桥梁,因此,解决船撞桥问题已成为摆在我国桥梁工作者面前的一个重要任务。基于性能的船撞桥设计成为桥梁设计中的新课题。阐述了基于性能的船撞桥设计的基本思想与基本内容;针对桥梁设计中各船撞桥指标难以精确计算的特点,提出了基于性能的船撞桥设计模糊决策方法。通过层次分析法和模糊数学理论,确定各因素的权重,对基于性能的船撞桥设计进行模糊决策。针对模糊决策中可能出现的决策失效的情况,采用系数伸缩变换法消除了决策中的失效。另外还给出了该决策方法的应用实例。
Throughout the world,ship collision with the bridge takes place every year.Not only the number of losses in terms of human lives is high,but also the economic loss is significant.In China,many new bridges will be constructed over busy rivers such as the Yangtze(which is a river with heavy navigation transportation).Therefore,it is an important task for designers and researchers in the field of bridge engineering in China to solve the problem.Performance-based ship collision design has become a new issue in the field of bridges design.Basic thought and basic contents of performance-based ship collision design for bridges are discussed in the paper.Because it is very difficult to calculate vessel-bridge collision factors accurately in ship collision design,fuzzy decision of performance-based ship collision design for bridges was proposed.Based on analytic hierarchy process and fuzzy mathematics theory,weighing of each factor was determined.Then,fuzzy decision was made to evaluate performance-based ship collision design for bridges.Furthermore,the algorithms removing inefficiency in fuzzy decision was described.The course of decision was illustrated by a case study.
Throughout the world,ship collision with the bridge takes place every year.Not only the number of losses in terms of human lives is high,but also the economic loss is significant.In China,many new bridges will be constructed over busy rivers such as the Yangtze(which is a river with heavy navigation transportation).Therefore,it is an important task for designers and researchers in the field of bridge engineering in China to solve the problem.Performance-based ship collision design has become a new issue in the field of bridges design.Basic thought and basic contents of performance-based ship collision design for bridges are discussed in the paper.Because it is very difficult to calculate vessel-bridge collision factors accurately in ship collision design,fuzzy decision of performance-based ship collision design for bridges was proposed.Based on analytic hierarchy process and fuzzy mathematics theory,weighing of each factor was determined.Then,fuzzy decision was made to evaluate performance-based ship collision design for bridges.Furthermore,the algorithms removing inefficiency in fuzzy decision was described.The course of decision was illustrated by a case study.
引文
[1]吕西林,李建中,唐益群,等.“5.12”汶川地震后同济大学技术人员在四川广元房屋应急评估工作概况及体会[J].结构工程师,2008,24(3):1-2.
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[5]杨忠琴.模糊综合评判失效及其处理[J].西南师范大学学报,1989,14(1):30-36.
[6]林铁良.船撞桥偏航角分布研究[J].结构工程师,2007,23(1):31-37.
[7]马军海,陈艾荣,贺君.桥梁全寿命设计总体框架研究[J].同济大学学报(自然科学版),2007,35(8):1003-1007.
[2]耿波,王君杰,汪宏,等.桥梁船撞风险评估系统总体研究[J].土木工程学报,2007,40(5):34-40.
[3]Zadeh L A.Fuzzy Sets[J].Information and Control,1965,8(3):338-353.
[4]林辉.船撞桥设计模糊决策初步研究[C]∥青岛海湾大桥国际桥梁论坛论文集.北京:人民交通出版社,2008.
[5]杨忠琴.模糊综合评判失效及其处理[J].西南师范大学学报,1989,14(1):30-36.
[6]林铁良.船撞桥偏航角分布研究[J].结构工程师,2007,23(1):31-37.
[7]马军海,陈艾荣,贺君.桥梁全寿命设计总体框架研究[J].同济大学学报(自然科学版),2007,35(8):1003-1007.
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