大跨径钢桥面铺装体系多目标优化设计

将大跨径钢桥的正交异性钢桥面和其上的铺装层作为钢桥面铺装体系整体进行多目标优化设计。取大跨径钢桥面铺装体系造价及铺装层表面极限应力最小化两类指标构造目标函数,在此基础上建立多目标优化设计的数学模型。采用评价函数中的线性加权和法进行求解,开发了钢桥面铺装体系结构多目标优化设计程序,以国内某大跨径钢桥为对象,采用多目标优化设计方法,给出钢桥面铺装体系中各参数的合理界限。应用国际通用有限元软件SPA93程序对其进行验证,结果表明,应用多目标优化设计方法对大跨径钢桥面铺装体系设计是可行的。研究成果可为大跨径钢桥面铺装体系结构的设计提供理论依据。

Multiple-objective optimum design of pavement system for long-span steel bridges

This study is concerned with the multiple objective optimum design of long-span orthotropic steel bridge deck and its pavement system.The price of material of the pavement system and the maximum tensile stress on the pavement are selected as the design objectives.The mathematical model of multiple objective optimum design is established,the solution is sought by using the linear weighted sum method of the evaluation functions,and a multiple objective optimum design program for the long-span orthotropic steel bridge deck and its pavement system is developed.The rational limits of parameters for steel bridge pavement systems are obtained through multiple-objective optimal design for a long-span steel bridge in China.The result is validated as reasonable,and the multiple-objective optimum design of long-span steel bridge pavement system is proven to be reasonable and may be used to provide a theoretical basis for the design of the pavement system of large-span steel bridges.