基于突变级数法的桥型方案适应性评价

目前在桥型方案比选的工程实践中,还较少通过方案适应性的评价以达到优选桥型方案的目的。本文在相关研究基础上,提出了桥型方案适应性评价的指标体系,并且结合突变理论,建立了基于桥型方案适应性评价的桥梁方案选型的突变级数法。首先对桥型方案评价目标进行多层次分解及评价指标属性值数据的归一化处理;然后根据相应的突变数学模型计算突变模糊隶属函数值;最后计算总突变级数值,据此对桥型方案进行优选。实例研究表明,该方法可靠性高、客观性强,为工程实践中桥型方案选型提供了新思路和途径。

Assessment of Bridge Types Adaptability Based on Catastrophe Progression Method

Scheme optimization according to the assessment of bridge types adaptability is rarely involved in practice. In the basis of the previous researches, assessment index system of bridge type a- daptability is presented in the paper, and catastrophe progression method of selecting bridge types accord- ing to the assessment of bridge types adaptability is established based on catastrophe theory. Firstly, the multi - level objects are analyzed and standard quantization of attribute values of assessment index is per- formed in the assessment of bridge type adaptability. Secondly, the catastrophic fuzzy affiliated function is constructed based on the corresponding catastrophe mathematical model, and the values are calculated, and the ultimate catastrophe progression values are calculated, which can be used to optimize bridge schemes. The study shows that catastrophe progression method has practical value in the optimization of bridge types.