钢筋混凝土构件组合体徐变系数的计算

钢筋混凝土构件的徐变可以用来估计结构物如大型桥梁的长期变形，不仅与混凝土的徐变特征有关，其取值还涉及构件配筋及受力状况.以钢筋混凝土构件为对象，推导了钢筋混凝土构件在轴向受压和压弯状态下徐变系数的计算方法，分析了徐变可复、不可复和部分可复3种徐变方程计算结果的差异，采用混凝土标准试件和钢筋混凝土配筋压柱进行了徐变试验，并分析比较了计算结果.结果表明，文中介绍的3种徐变方程的计算结果与试验结果接近，可以方便应用.

Calculation method for creep coefficient of reinforced concrete composite members

The creep of reinforced concrete member can be used to estimate the long term deformation of structures such as large bridges. It is not only relevant to the creep characteristics of concrete， but its values involve the members’ reinforcement and stress state. Reinforced concrete members are the object of study in this paper. The calculation method for the creep coefficient of reinforced concrete members under axial compression or compression-bending is derived. The difference of results， which are calculated by means of the creep equations under recoverable， unrecoverable and partly-recoverable creep deformation， is analyzed. The concrete standard specimens and reinforced concrete compression columns and rectangular beams are used for the creep tests， and the test results are compared with the calculation results. The analyses show that the calculation results by three creep equations presented in this paper are similar to the test results and can be applied expediently.