弯距 bending moment 弯距是构件受力发生弯曲时，在它内部任一横截面上的两方出现的相互作用的内力矩．构件某一横截面上的弯矩值等于此一截面左侧（或右侧）诸外力对截面形心力矩的代数和。
首先给出了半管加热管及壳体的弯距、剪力及最大应力计算公式。
In this article, it shows formulas to calculate bending moment, shear strength and maximum stress of heat tracing pipe and shell body.
由于现浇框架梁板共同工作，当梁受扭时，板中必然产生附加弯距，同时板也约束了梁的转动。
When the frame beam works under torsional moment, extra bending moment is to be produced in the reinforce slab because the frame beam and the reinforce slab work together.
如有必要，可以将负弯矩配置到承担一半以上的总弯距，这很适于使桥梁形成优美的曲线轮廓。
If desired, the hogging may be arranged to take more than half the total moment, which fits well with a graceful curved profile.
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