跨海混凝土桥梁耐久性评价中权重值计算方法研究

Study on Weight Value Calculation Method in Durability Evaluation of Sea-crossing Concrete Bridge

摘要:

跨海桥梁耐久性关系到结构物使用安全及寿命，针对评价指标体系权重值计算方法问题，采用了区间多属性群策方法与数理优化相结合的计算方法，将具有专家风险态度的主观权重与客观权重进行组合权重值计算，并通过实证对比分析了组合赋权值计算新方法与当前规范计算方法的异同，验证了改进后组合赋值计算方法的可靠性和优越性。研究结果为跨海混凝土桥梁的耐久性评价提供了理论依据和支撑，该方法不仅可以提高其评价的准确性和科学性，还对工程实践具有指导意义。

Abstract:

The durability of sea-crossing bridges is related to the safety and service life of structures. Aiming at the calculation method of weight value of evaluation index system， the method of interval multi-attribute group strategy combined with mathematical optimization is adopted to calculate the combined weight value of subjective and objective weights with expert risk attitude. The similarities and differences between the new method for calculating the combinatorial weights and the current standard method are analyzed through empirical comparison to verify the reliability and advantages of the modified combinatorial weight calculation method. The study results provide the theoretical basis and support for evaluating the durability of sea-crossing concrete bridges. The method not only improves the accuracy and scientificity of its evaluation， but also provides the guidance for engineering practice.