摘要
Abstract
In order to improve the mechanical properties of prestressed reinforced concrete box girder,the flexural and shear properties of rein-forced concrete box girder in bridge engineering were tested and analyzed by full scale test.The test results show that with the increase of load,the development stages of deflection at the mid-span and loading point of the prestressed reinforced concrete box girder include uncracked,cracked,plastic and failure stages.The maximum deflection of box girder is 294 mm after the steel bar yield.With the increase of the load,the strain of the main reinforcement of the section first increases linearly,then increases rapidly,and then slowly increases to a stable state.The deflection of box girder increases linearly at first and then rapidly increases to the peak value.After unloading,the deflection decreases rapidly.The greater the distance from the fulcrum,the greater the strain of stirrup and the smaller the shear strain of web concrete.关键词
桥梁工程/钢筋混凝土/预应力/抗弯性能/抗剪性能Key words
Bridge engineering/Reinforced concrete/Prestress/Bending resistance/Shear resistance分类
交通工程
