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Span length optimization in design of the concrete box girder bridges

机译:混凝土箱梁桥设计中跨距的优化

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摘要

Using Visual Basic (v.6.0) programming structures, a group of computer algorithms has been built for computing main bearing parts of the bridge starting from the superstructure to the foundations dependent on the span length. The expressions the program uses for dimensioning are engineer empirical values obtained by assessment of the previous projects. For each of the spans, values of element dimensions are obtained and used to calculate material consumption and ultimately its cost. For a fixed group of input variables one span can be then adopted as the optimal one with the minimal cost. The structural type for this analysis is concrete box girder with constant or variable height depending on the span length. If one of the input variables is changeable one can see its influence on the optimal values.
机译:使用Visual Basic(v.6.0)编程结构,已建立了一组计算机算法,用于计算桥梁的主要承重部分,取决于上跨度,从上部结构到基础。程序用于标注尺寸的表达式是通过评估先前项目获得的工程师经验值。对于每个跨度,都将获得元素尺寸的值,并将其用于计算材料消耗并最终计算其成本。对于一组固定的输入变量,则可以采用一个跨度作为成本最小的最佳跨度。此分析的结构类型为混凝土箱梁,其高度根据跨度长度而定,可以是恒定的或可变的。如果输入变量之一是可更改的,则可以看到其对最佳值的影响。

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