Bridges have a significant role in society but are often massive structures requiring a high amount of materials, leading to high consumption of natural resources and high costs. In this respect, the use of high-strength steel (HSS) may represent a significant advantage as it enables to reduce the quantity of materials required for a structure to fulfil its function. Notwithstanding this potential benefit, the use of slender plates allowed by HSS makes I-girders more vulnerable to local bucking phenomena and fatigue issues. Hence, this article aims to discuss the potential advantages of HSS in bridge design, in terms of structural, environmental and economic performances. The discussion is based on a comparative analysis, in which a bridge made of steel grade S355 is compared with two alternative designs made of steel grade S690. The results of the analysis showed that although the use of HSS in bridges enables to save steel, thus providing some environmental advantages, in terms of costs the differences are negligible due to the higher requirements of HSS bridges.

桥梁在社会中发挥着重要作用，但通常是需要大量材料的大型结构，导致自然资源的大量消耗和高成本。在这方面，使用高强度钢（HSS）可能会代表一个显着的优势，因为它可以减少结构实现其功能所需的材料数量。尽管有这种潜在的好处，但HSS允许使用的细长板使工字梁更容易受到局部屈曲现象和疲劳问题的影响。因此，本文旨在从结构，环境和经济性能方面探讨高速钢在桥梁设计中的潜在优势。讨论基于比较分析，在该分析中，将钢级S355制成的桥梁与两种钢级S690制成的替代设计进行了比较。