简支梁绝对最大弯矩计算方法的教学改革

针对简支绝对最大弯矩的计算方法，教学实践中提倡一种划发截面近似算法。该法以影响线、计算机分别作为理论分析与计算工具，可同步解决恒载和移动活载作用下简支梁绝对最大弯矩的近似计算和弯矩包络图的绘制。实践证明，上机电算可培养学生对科学现象的自觉洞察的分析判断能力，同时可使学生对教材中的精确算法两步求解过程加深理解。

Reformation of teaching method on absolute maximum bending moment of simply supported beam

In this article,an approximate method by dividing sections was advocated on the calculating method about maximum bending moment of simply supported beam.In the meantime,it can complete the approximate calculation of maximum bending moment and drawing of envelope of bending moment on simply supported beam by the action of both permanent loads and moving boads.It was proved that the approximate method given in this article could not only help students to train the active observation,analysis and judgement ability,but also help students to understand deeply about the precise method on current books which needs two steps during calculation.