基于改进AHP算法的桥梁风险评估模型的研究

摘要

Considering the complex and uncertain risk factors in the bridge engineering,a new risk-assessment mod-el in bridge engineering is established based on the modified AHP algorithm. The risk evaluation system of bridge engineering is firstly constructed and thereafter researched the identification and analysis of the risk,from such parts as natural disaster,human factor,degradation of structure,and technique. Then the initial risk-assessment judgment matrix can be constructed with the triangular fuzzy number based on a new scale,and after that the weight of each risk-index is calculated with the structure of AHP. Finally,the order of risk-factors can be gained. The mod-el of risk assessment in bridge engineering has been proved to be scientific and suitable.%针对桥梁工程风险因素的不确定性和复杂性，建立了基于改进AHP算法的桥梁风险评估模型。文章首先按风险来源从自然灾害、人为因素、结构退化、技术风险等方面进行风险识别研究，建立了桥梁风险指标评价体系，其次基于新标度和三角模糊数进行打分，并建立了风险评价初始矩阵，最后结合AHP层次结构得各风险指标的权重，进行风险指标排序和风险评估分析。实例证明，本模型科学合理。