徐变收缩对劲性钢骨混凝土拱肋影响的计算方法

Creep-shrinkage Analysis of Internal Force and Stress Redistribution in Concrete Arch Bridges with Stiffen Framework

本文采用平面等参元对劲性骨架混凝土拱肋的徐变收缩内(应)力重分布进行计算分析,主要探讨分环浇注劲性骨架混凝土拱桥徐变收缩计算方法以及劲性骨架对混凝土拱肋徐变收缩的约束作用,同时将徐变收缩计算结果和弹性计算结果进行了对比分析.并对拱顶截面的徐变收缩进行了模型试验研究.

An analytical approach to calculate time-dependent forces and stresses in concrete arch ribs with stiffen framework is developed in this paper by using eightnode plane isoparametric element, The method of calculation of creep-shrinkage of the ribs cast by ringgs and the restraint effect of the stiffen framework on the creep and shrinkage are studied in detail and the results of which are compared with results from elastic theory. Finally the results of a model test on the creep and shrinkage at the top section of the arch rib are presented.