大跨径悬索桥施工风险分析

发布时间：2018-04-19 03:35

本文选题：大跨径悬索桥 + 模糊层次分析法　；参考：《南昌航空大学》2017年硕士论文

【摘要】：近年来,伴随着技术和结构的创新,大跨径悬索桥得到了高速发展。与此同时,由于各种不确定性因素的增加,此类桥梁建设面临着前所未有的高风险,从而在一定程度上制约了其发展。因此,在建桥梁的风险评估与预防控制越来越重要。本文围绕大跨径悬索桥施工风险分析开展研究,主要工作包括:(1)将风险理论应用于桥梁工程领域,明确桥梁施工风险定义,构建桥梁施工风险分析总体框架。(2)结合大跨径悬索桥施工特征,从施工技术、成本费用、工期、质量、人员安全五个方面对大跨径悬索桥进行施工风险分析。通过查找相关桥梁建设施工潜在风险资料构建大桥施工风险因素清单,为桥梁施工风险识别奠定基础。(3)以模糊层次分析法为基础,建立了加劲梁悬索桥施工风险识别模型。基于模糊互补判断矩阵原理,并借助Matlab编写源代码求解各风险权重值并按大小排序,确定大桥施工主要风险因素。(4)运用模糊综合评价法,结合基于ALARP准则的风险矩阵法及专家调查法,建立了加劲梁悬索桥施工风险评估模型。围绕施工技术等风险因素从施工概率估计、损失后果估计两方面进行施工风险评估,在此基础上运用Matlab软件编写程序得出大桥总体施工风险等级。(5)针对“五峰山长江大桥”实际工程,按本文建立的大跨径悬索桥施工风险评估体系对其进行风险评估,得出大桥施工总体风险等级,针对风险等级程度提出了施工风险预防与控制的相应措施。
[Abstract]:In recent years, with the innovation of technology and structure, long-span suspension bridge has been developing at high speed.At the same time, due to the increase of uncertain factors, the bridge construction is facing unprecedented high risk, which restricts its development to a certain extent.Therefore, the risk assessment and prevention and control of the bridge under construction is becoming more and more important.In this paper, the risk analysis of long-span suspension bridge is studied. The main work includes the application of risk theory to bridge engineering, and the definition of bridge construction risk.Based on the construction characteristics of long-span suspension bridge, the construction risk of long-span suspension bridge is analyzed from five aspects: construction technology, cost, time limit, quality and safety of personnel.Based on the fuzzy analytic hierarchy process (FAHP), the construction risk identification model of stiffened girder suspension bridge is established by looking up the relevant bridge construction potential risk data to construct the list of bridge construction risk factors, laying a foundation for bridge construction risk identification.Based on the principle of fuzzy complementary judgment matrix, and with the help of Matlab, the main risk factors of bridge construction are determined by calculating the weight value of each risk and ranking according to the size.) the fuzzy comprehensive evaluation method is used.Combined with the risk matrix method based on ALARP criterion and the expert investigation method, the construction risk assessment model of stiffened girder suspension bridge is established.Based on the construction technology and other risk factors, the construction risk assessment is carried out from two aspects: construction probability estimation, loss consequence estimation,On this basis, the overall construction risk grade of the bridge is obtained by using Matlab software. 5) aiming at the actual project of "Wufengshan Yangtze River Bridge", according to the risk assessment system of the long-span suspension bridge established in this paper, the risk assessment is carried out.The overall risk grade of the bridge construction is obtained, and the corresponding measures to prevent and control the construction risk are put forward in view of the risk grade degree.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.1

【参考文献】