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推导了用抛物线理论与悬链线理论计算斜拉索无应力长度的公式 ,以南京长江二桥南汊斜拉桥为例 ,分析了用悬链线与抛物线理论计算斜拉索无应力长度的差别 .通过比较 ,认为对大跨度斜拉桥 ,用抛物线理论计算拉索无应力长度 ,完全可以满足精度要求
The formula to calculate the stress - free length of stay cables by using parabola theory and catenary theory is deduced. Taking Nanjing South Chang cable - stayed bridge at Nanjing No.2 Bridge as an example, the stress - strain length of stay cables and parabola theory is analyzed Difference.According to the comparison, it is considered that using parabola theory to calculate the stress-free length of the cable for the long-span cable-stayed bridge can meet the requirement of accuracy