Vibration and Deflection of Steel Bridges
Vibration and Deflection of Steel Bridges
复制标题
钢桥的振动和挠度
DOI：
10.62913/engj.v9i1.178
复制
发表时间：
1972
期刊：
影响因子：
--
通讯作者：
W. H. Walker
中科院分区：
文献类型：
--
作者：
R. Wright;W. H. Walker
设计者希望为公路桥梁提供足够的强度、不会因疲劳损坏而中断的使用寿命、耐用的行驶表面以及为行人和行驶车辆的乘客提供舒适的十字路口。钢制多纵梁公路桥梁设计中采用的标准之一是对纵梁的细长度和灵活性的限制。这些限制通常导致桥梁设计需要额外的路堤和通行权，而垂直间隙很小，并且阻碍了高强度钢的经济应用。目前尚不清楚它们如何有助于实现上述所需的品质。本文的目的是：(1) 探讨纵梁灵活性和细长度对公路桥梁质量的实际影响；(2) 提出改进的标准，帮助设计者实现高质量、经济的结构。本文的目的是展示多梁钢公路桥梁的细长度和柔性对其强度和使用性能的影响。细长度会影响桥梁纵梁所需的钢材数量，并对桥梁的自重产生相关的次要影响。灵活性影响对静态（缓慢移动）载荷和动态载荷的响应。
Designers wish to provide highway bridges with adequate strength, service lives uninterrupted by fatigue damage, durable riding surfaces, and comfortable crossings for pedestrians and occupants of moving vehicles. Among the criteria employed in the design of steel multistringer highway bridges are limitations on the slenderness and flexibility of the stringers. These limitations commonly lead to bridge designs which need extra embankment and right-of-waywhere vertical clearances are tight and prevent economical applications of high strength steel. It is less clear how they contribute to the desired qualities noted above. The objectives of this paper are: (1) to explore the actual effects of stringer flexibility and slenderness on the quality of highway bridges, and (2) to suggest improved criteria which may help the designer achieve a high quality, economical structure. The objective of this paper is to show the effects of the slenderness and flexibility of multistringer steel highway bridges on their strength and serviceability. Slenderness affects the amount of steel required for bridge stringers and has an associated secondary influence on the dead weight ofthe bridge. Flexibility affects responses to static (slowly moving) loadings and to dynamic loadings.