基于AHP和模糊理论的斜拉桥稳定性评价

数值分析方法研究斜拉桥稳定性,工作量大,计算方法复杂,且难以综合考虑稳定性影响因素.运用模糊理论中多级模糊综合评判法对大跨径斜拉桥的稳定性进行研究.通过全面考虑影响因素,建立单因素评判矩阵,综合应用专家评测法和层次分析法确定各因素的权重,较好地量化了全面评估过程.最后通过多级模糊综合评判得到斜拉桥稳定性评判结果,从而可知斜拉桥是否满足稳定性要求.

Evaluation for Cable-Stayed Bridges Stability Based on Fuzzy Theory and AHP

If the stability of cable-stayed bridges are analyzed by means of a numerical procedure,it is difficult to analyze all the factors synthetically,the calculational method is complicated and workload is great.Based on the fuzzy theory,the research on stability of cable-stayed bridges are carried out by the multi-grade fuzzy synthetic judge.Considering factors about stability,the evaluation matrixes of single factor are established,then,the proportions of all kinds of factors are determined by comprehensive application to AHP and the experts evaluating method,the procedure of evaluation is quantitated preferably.At last,the result of evaluation for the cable-stayed bridges stability is drawn through the model of the multi-grade fuzzy synthesis judge.Consequently,whether the stability of cable-stayed bridges is satisfying is known.