大桥混凝土徐变控制研究及预测

Bridge Inspection of Concrete Creep and Prediction

混凝土收缩、徐变的控制和准确预测在世界范围内一直是个难题。论文针对已建高速铁路特大跨预应力混凝土连续梁徐变变形进行深入研究,讨论了混凝土收缩与徐变引起的构件预应力损失,并用数值方法分析构件预应力损失后的力学变化。解决了以往由于没有实测数据作参考而造成预测不准确的问题。

Aiming at the high-speed railway track has been built large span prestressed concrete continuous beams to study creep deformation,summarizes the results of numerous studies,the paper discusses the calculation of shrinkage and creep of concrete elements caused by prestress loss,and with the numerical method pre-members loss of the mechanical stress changes.