基于模糊层次分析法的石拱桥适用性评价分析

Applicability Evaluation Analysis of Stone Arch Bridge Based on Fuzzy Analytic Hierarchy Process

由于石拱桥受外界环境因素及人为破坏导致桥体出现多种病害,状态发生变化,造成与竣工时初始状态存在一定偏差。为了确保石拱桥的正常使用,对石拱桥进行适用性评价具有重要意义。考虑石拱桥指标体系因素复杂且定性指标较多,因此本文以模糊层次分析法为基础建立石拱桥适用性评价体系。选择北京卢沟桥为例进行适用性评价分析,结果表明,卢沟桥的适用性评价等级为中级,目前已经不再承担机动车行驶的交通功能。研究结果可以为卢沟桥后续保护工作提供依据,评价方法可为其他石拱桥保护工作提供科学支撑。

Due to the external environmental factors and man-made destruction of stone arch bridge,the bridge body suffers a variety of diseases,so that its state changes,resulting in a certain deviation from the completion of the initial state.In order to ensure the normal use of stone arch bridges,it is important to evaluate the applicability of stone arch bridges.However,considering that the index system of stone arch bridge is complicated and there are many qualitative indexes,this paper establishes the applicability evaluation system of stone arch bridge based on fuzzy analytic hierarchy process.With the Lugou Bridge in Beijing as an example,the applicability evaluation analysis shows that the applicability evaluation grade of Lugou Bridge is intermediate.In view of the actual situation,it no longer bears the traffic function of motor vehicles.The analysis results can provide a basis for the follow-up protection of Lugou Bridge,and the evaluation method can provide scientific support for other stone arch bridge protection.