【摘要】 箱型钢梁是薄壁结构,理论上应使用板壳元素为分析元素较能反映实际的受力及变形。为有效进行设计与分析,已有多种商业软件,但是在确定分析元素与分析的前置作业也相当繁杂费时,而造成初步设计的困难。因此如何利用平板力学相关理论推导箱型钢梁受力变形近似公式将可帮助箱型钢梁设计者减少非必要的工作负担。本文的探讨方法是将箱型钢梁上翼板变形分为上翼板与腹板交界处变形及上翼板变形这两种变形的迭加,进而推导出近似公式。直线型式等截面简支箱型钢梁分别用有限元软件SAP2000和近似公式计算进行准确度的比较,误差百分比尚在初步设计的容许误差范围内。更多还原

【Abstract】 In engineering practice,analysis and design of bridge girder is primarily carried out through application of commercial software.Even in this situation,considerable efforts are still required to get through the solution procedure,not only in the preparation of input data but also in the interpretation of the outcome.This paper is aimed to derive explicit expressions that can be used to give a crude approximation for the behavior of a deck slab under uniformly distributed loading.Results obtained by the proposed formulas are compared to those analyzed by means of the finite element program SAP 2000,which indicates that the errors are within the range of allowance.更多还原