桥梁结构混凝土徐变试验研究

Concrete Creep Strain Experiment of Bridge Structure

选取多个双支薄壁混凝土桥墩为研究对象进行混凝土徐变的试验研究,得到在应力、凝期、持荷时间、温度等主要因素不断变化下实际混凝土结构徐变的函数。实测结果与理论值比较验证了函数的合理性,并且可运用于上部结构混凝土徐变的预测中。

This paper selected several double thin-wall concrete piers as the research object to carry out concrete creep strain experiment, based on which,the function of concrete creep was gained ,which has many ceaselessly changing influence factors such as stress, time and temperature etc. Comparing the measured results with the calculation ones proved that the function is rational and it can be used to forecast concrete creep of the superstructure. It has some instructional function for such aspects as concrete-box camber installation, concrete-box beam stress test, concrete creep estimate of pier and box girder under the initial and live load so as to insure the constructed bridge has reasonable line and internal force.