肖芝兰  曾庆响
    （五邑大学土木工程系  江门 529020）

[提要]  根据广义位移计算的一般公式导出纵向齿状截面简支梁的挠度计算方法，以实际工程中纵向齿状截面梁的典型楼梯梁（板）为对象，考虑弯矩和剪力的共同作用，综合分析了纵向齿状截面和跨高比的变化对梁挠度计算等效高度的影响，进而得出纵向齿状截面梁挠度计算的简便方法和几条实用的结论，并提出几点应注意的问题。
[关键词]  楼梯梁  纵向齿状截面  等效高度  挠度  简化计算

A deflection calculation method of beams with longitudinal dentiform section was carried out from the formula of general displacements calculating. The stair bearers were considered as typical representations of longitudinal dentiform section beam,the combine action of bending moment and shear force was taken into account. The influences, which acted on beam's equivalent depth in deflection calculating caused by the change of longitudinal dentiform section and the ratio of span to depth, were comprehensively analyzed. Therefore, the simplified calculation methods of longitudinal dentiform section beam's deflection are clerived, several practical conclusions are presented, and some problems to which should be paid attention are posed.
Keywords:  longitudinal dentiform section; equivalent depth; deflection; simplified calculation method