预应力混凝土弯坡连续刚构桥收缩徐变效应研究

Research on shrinkage and creep effect at prestressed concrete curved continuous rigid bridge

通过数值模拟方法对预应力混凝土弯坡连续刚构桥收缩徐变效应进行研究,从时变特征、弹性模量、加载龄期、环境湿度四个方面的变化分析,得出随曲率半径、纵坡的变化,并总结出这些影响因子对桥型变形、内力的影响程度及变化规律。

According to the numeric simulation method,the paper researches the shrinkage and creep effect at the prestressed concrete curved continuous rigid bridge,analyzes the changes from the time-varying feature,elastic modulus,age of loading,and environmental humidity,con-cludes changes along with diameter of curvature and longitude slope,and points out the influential levels and change rule for the bridge deforma-tion and internal force.