摘要
在钢筋混凝土肋梁楼盖中,其主梁采用弹性理论进行内力计算。对于等跨三分点集中荷载作用下的主梁,相关参考书中仅给出了跨中最大弯矩处的计算系数,其它关键截面处的计算系数则未给出,这对主梁弯矩图及弯矩包络图的准确绘制及描述带来一定的困难,使梁中负弯矩筋的截断点的位置确定显得困难。为此,对三分点集中荷载下的2、3、4、5跨连续梁,根据静力平衡条件,采用弯矩叠加法,给出了另一点处的弯矩计算系数。其结论对相关工程问题的计算,具有参考价值。
The primary beam＇s internal force of ribbed floor is calculated using elastic theory. The maximum bending moment coefficient about main beam of equidistant two points load in a span is given in correlative reference books only,and the other is not given at all. It is challenging to draw the bending moment diagram accurately. So it is not accurate to draw the bending moment envelope diagram. It is difficult to confirm the point of the negative moment shortened steel bar. For this reason,the other bending moment coefficient is given about the 2,3,4,5 spans＇beam of equidistant two points load in a span using existed authentic data and bending moment superposition method. It provides convenient reference for associated structure calculation.
出处
《南阳理工学院学报》
2009年第6期36-40,共5页
Journal of Nanyang Institute of Technology
关键词
弹性连续梁
弯矩叠加
弯矩系数
Elastic continuous beam
Bending moment superposition
Bending moment coefficient
