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弯矩定点法的理论,对计算连续梁和刚架来说,具有重大的实用上和理论上的意义。但一般书籍中所介绍的用弯矩定点法计算连续梁的方法,由于对荷载跨的处理不够理想,如当各跨均有荷载时,计算起来比较麻烦,因而就大大的限制了它的广泛使用。笔者根据弯矩定点法的原理,将荷载跨另作处理,这样将消除原弯矩定点法计算连续梁的缺点,使计算手续大大简化。本文以变截而连梁为推导公式的依据,並随时指出等截而梁的公式,以便应用。
The theory of the fixed point method of bending moments is of great practical and theoretical significance for the calculation of continuous beams and rigid frames. However, the method of calculating the continuous beam using the fixed-point method of bending moment described in the general book, due to the unsatisfactory handling of the load span, such as when each span has loads, is computationally troublesome, and thus greatly limits its wide range. use. According to the principle of the fixed point method of the bending moment, the author will deal with the load spans separately. This will eliminate the defects of the continuous beam calculated by the original bending moment fixed point method and greatly simplify the calculation procedures. This paper uses the variable truncated beam as the basis for the derivation of the formula, and points out the equation of truncated beam in order to apply it.