【摘要】 基于所建立的无弹性悬链线解答,推导了悬索的索原长计算式及索原长与跨中标高之间的微分关系式。算例表明,索原长计算式是精确的,索原长与跨中标高之间的微分关系式比常用的悬索桥抛物线调缆公式精度更高;常用的悬索桥调缆公式对中跨有很高的精度,但应用于边跨时误差很大。建议在中跨仍采用常用调缆公式,在边跨适当放大常用公式得到的调整量,也可采用文中的调缆公式或计算调缆前后的索原长得到调整量。更多还原

【Abstract】 Based on the deduced non-elastic catenary solutions,formulas to calculate unstrained length of cable,differential relation between unstrained length and vertical coordinate at the middle of span are deduced.Practice indicated the former is exact and the later is better than the common strand adjusting formula based on parabola solution.It is also indicated that the common formula has good precision in midspan of suspension bridge,and large error in side span.It is proposed that the common formula be used to the midspan,its enlarged adjusting length can be used in the side span,the derived differential formula can be used directly or unstrained length formula be used to calculate the adjusting length.更多还原