格式组合体系的桥梁结构是一种比较新的型式,无论对于焊接钢桥或预应力钢筋混凝土桥梁来说,都具有一定的推广价值。但是在分析其内力的时候,一般都感到甚为繁复,本文依据反力变位互等定理,提出了用求挠度曲线的方法来代替冗力矩影响线的推求,其计算过程较为简捷,精确程度并不降低。此法已在本院桥梁专业两届毕业设计中运用,效果较好。 The bridge structure of the format combination system is a relatively new type, which has certain promotion value for welded steel bridges or prestressed reinforced concrete bridges. However, when analyzing its internal forces, it is usually very complicated. Based on the reciprocal theorem of reaction force and displacement, this paper proposes the method of calculating deflection curves instead of the calculation of influence lines of redundant moment. The calculation process is simple and accurate Does not decrease. This method has been used in the bridge professional graduate design two, the effect is better.