收缩徐变对矮塔斜拉桥主梁挠度的影响

Effect of Shrinkage and Creep on Deflection of Unequal Span Section of Low Pylon Cable-stayed Bridge

收缩徐变是混凝土材料的一种特性,特别是对于矮塔斜拉桥来说,收缩徐变效应在结构效应中占有一定的比例,混凝土收缩、徐变的机理很复杂,其中计算数学模型很多,计算模型中参数的取值不同对结果的影响很大。因此研究收缩徐变的计算理论对于评估对矮塔斜拉桥的影响有重大意义。

As a composite system of cable-stayed continuous beam(rigid frame),the short tower cable-stayed bridge is a transitional bridge between the conventional cable-stayed bridge and the continuous beam bridge(rigid frame),and the external cable does not appear to shrink and creep.Therefore,the influence of shrinkage and creep of main girder must be calculated before making judgement.