常截面悬臂箱梁跨间作用集中力和集中弯矩时负剪力滞效应的分析

NEGATIVE SHEAR LAG EFFECT IN CANTILEVER BOX SECTION OF CONSTANT DEPTH WITH A POINT LOAD OR A MOMENT ACTING WITHIN THE SPAN

本文按翼缘板纵向位移函数为4次抛物线变化规律研究跨间承受一集中力及集中弯矩时的负剪力滞效应。采用变分法求解,并探讨影响负剪力滞效应的有关因素,通过模型试验验证理论分析的正确性。

Negative shear lag effect in cantilever box section of constant depth is studied with a point load as well as moment applying within the cantil- erer span length.Derivations for normal stresses and addifional moments are given adopting the variation approach as analytical means.Theoretical results are compared with perspex model tests.Offset is being noted only near the fixed end of cantilever box beam.Further study and research seems to be necessary near the boundary region.