斜拉桥无应力索长计算讨论

Discussion on the unstressing cable length calculation of cable stayed bridge

以唐山曹妃甸1号桥为工程背景,对规范公式的适用性、符号的取值、温度对索长的影响等问题做了讨论,得出了在设计温度下得到的无应力索长比较准确,由温度引起的索长变化在锚杯的可调范围之内的结论,提出了实际工程中不要一次性制作所有拉索的建议。

With Tangshan Caofeidian No. 1 bridge as engineering background, the standard formula applicability, sign sampling value and temperature influence on cable length were discussed. It concluded that unstressing cable length under design temperature was more accurate and the cable length change provoked by temperature was in the anchor cup scope. The suggestion that not produced cable at single time was proposed.