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首页> 外文期刊>SIAM journal on applied dynamical systems >Optimal design of an arch bridge with high performance steel for bridges using genetic algorithm
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Optimal design of an arch bridge with high performance steel for bridges using genetic algorithm

机译：遗传算法高性能钢拱桥最佳设计

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摘要

An optimal design of a steel arch bridge was performed in this study, to measure the effect of high performance steel for bridges (HSB), which was developed in Korea. A basic design was performed first, using SM520 only, which is a conventional rolled steel. Then, another steel arch bridge satisfying the same design requirement was designed using HSB only, which provided information for deciding on the proper shapes of cross section of various members. In the final stage, bridge members experiencing relatively high stress with respect to the yield stress, such as arch rib, main frame, and cross beam, were chosen to be made of HSB while other members were made of SM520. A genetic algorithm was used with the aims of minimizing the material cost of the major steel members. Limit stress and limit deflection were applied as constraints, according to the design specifications. By selectively choosing HSB, which has a relatively high allowable stress compared to general steel, it was concluded that the cross sectional area of the whole structure decreased and the material cost of the steel members also decreased, even considering the higher price per unit mass for HSB than that for SM520. To investigate the deterioration in dynamic performance due to the increased slenderness of steel members when HSB is used, an earthquake analysis was done. No meaningful change in the dynamic performance was found.
机译：在本研究中进行了钢拱桥的最佳设计，测量韩国开发的桥梁（HSB）的高性能钢的影响。首先使用基本设计，仅使用SM520，这是一种传统的轧制钢。然后，仅使用HSB设计了满足相同设计要求的另一个钢拱桥，其提供了用于决定各种构件的横截面的适当形状的信息。在最后阶段，选择相对于屈服应力的桥梁构件，例如拱形肋，主框架和横梁，以由HSB制成，而其他成员由SM520制成。遗传算法用于最小化主要钢构件的材料成本的目的。根据设计规范，限制应力和限制偏转作为约束。通过选择性地选择具有相对较高的允许应力的HSB与一般钢相比，得出结论是整个结构的横截面积降低，钢构件的材料成本也降低，甚至考虑到每单位质量的较高价格HSB比SM520的HSB。为了探讨使用HSB的钢构件的纤细性增加而导致动态性能的劣化，完成了地震分析。发现动态性能没有有意义的变化。

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