基于傅立叶级数混凝土箱梁腹板竖向正应力的弹性计算  

Elastic Calculation of Vertical Normal Stress of Concrete Box Beam Web Based on Fourier Series

作　　者：危红波 

机构地区：[1]浙江省丽水市市政设施管理处,浙江丽水323000

出　　处：《城市道桥与防洪》2012年第7期159-160,15,共2页Urban Roads Bridges & Flood Control

摘　　要：2004版桥规关于竖向预应力的计算公式实际是计算的平均竖向压应力,没有充分考虑到预加力的局部扩散效应。把竖向预应力作为不连续荷载,以傅立叶级数形式展开,导出竖向预加力作用下无限狭长矩形薄板竖向正应力弹性解析公式,该公式可用于预应力混凝土箱梁腹板竖向正应力的计算。The calculation formula of vertical pre-stress in 2004 Edition of Bridge Regulation is practical to calculate the average vertical compressive stress, and not to fully consider the localized diffusion effect of pre-stressing force. The vertical pre-stress, as the non-continuous load, is developed in the type of Fourier series to educe the vertical normal stress elastic resolving formula of infinite length rectangular thin plate under the action of vertical pre-stressing force. This formula can be used for the calculation of vertical normal stress of pre-stressed concrete box beam web.

关 键 词：箱梁  腹板 竖向预应力 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]