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为完善传统模糊评判方法,体现模糊评判过程中的非线性特征,针对整体吊装钢管混凝土系杆拱桥施工风险特点,提出一种基于结构熵权的非线性模糊评判方法。依据施工工序,对整体吊装钢管混凝土系杆拱桥施工过程进行风险源识别,建立施工风险层次评价体系,识别过程同时考虑结构安全与人员安全。基于风险源识别结果,构建整体吊装钢管混凝土系杆拱桥二级模糊评判计算模型,采用主观赋权法与客观赋权法相结合的结构熵权法求解权重,引入非线性模糊算法,反映高风险指标对评判结果的突出影响,进而建立整体吊装钢管混凝土系杆拱桥施工风险非线性模糊评判方法。最后,通过工程实例的分析计算,表明了该方法的可行性与有效性。
In order to improve the traditional fuzzy evaluation method and reflect the nonlinear characteristics in the fuzzy evaluation process, a nonlinear fuzzy evaluation method based on the entropy of structure is proposed in view of the construction risk characteristics of the whole CFST arch bridge. According to the construction process, the risk source identification of the whole hoisting steel tube concrete tied arch bridge is carried out, and the evaluation system of the construction risk level is established. The identification process considers both structural safety and personnel safety. Based on the results of risk source identification, the second-level fuzzy evaluation model for the whole hoisting CFST arch bridge was constructed. The weight of the method was calculated by the entropy weight method based on subjective weighting and objective weighting. Non-linear fuzzy algorithm was introduced to reflect the high risk index Which has a prominent impact on the evaluation results and then establishes a nonlinear fuzzy evaluation method for the overall construction risk of the concrete-filled steel tubular tied arch bridge. Finally, through the analysis and calculation of engineering examples, the feasibility and effectiveness of the method are demonstrated.