桥梁节段施工过程中混凝土时变模式分析

文章讨论了混凝土时变性能的分析模式及在时变荷载和时变位移下的徐变应变的数学模式，建立求徐变增量的递推公式，正确计算施工阶段的变位，实现施工控制。递推公式中徐变柔度系数ａｉ用最小二乘曲线拟合方法求得，较以往的递推公式有明显的优点。

This paper dicuss analyticl model of time dependent behavior of concret and methemetical model of creep strain under time dependent ioads and time dependent displacements. The recursive fromulas for caculating the creep strain incriment have been developed. The displacements of erection period have been caculated correctly. The erection control of bridge has been realised. A least squares curving fitting approach for the determination of the creep compliance coefficients for the algorithm is presented, and it's better than perious recursive formulas.