弹性地基梁弯矩系数的影响因素

针对文克尔地基上的两种不同断面(矩形和倒梯形)的弹性地基梁,分析了地基反力系数、外加荷载、混凝土强度等级以及梁的长高比、宽高比等因素对弯矩系数的影响规律。结果表明:弯矩系数随着地基反力系数的增加而减小,随着混凝土强度等级的增加而增加,随着梁长高比的增加而减小,随着外加荷载和梁的宽高比的增加不变;同等条件下,倒梯形断面形式的地基梁在受力方面优于矩形断面形式梁。

Effect factors of bending moment coefficient for elastic foundation beams

for two different sections(rectangular and inverted trapezoid) of elastic foundation beams with Winkler foundation,we analyze the bending moment coefficient with different affect factors.The results show that the bending moment coefficient decreases with the increase of the foundation counterforce coefficient,increases along with the increase of concrete strength,decreases with the increase of the beam’s length-height ratio,and keep unchanged with the increase of the width-height ratio of the imposed load and beam.Under the same condition,the stress state of the foundation beam with the inverted trapezoid cross-section is superior to that with the rectangular cross-section.