The purpose of this essay is to study tensile radial force of prestressed steel strand acted on box girder beam of continuous rigid frame bridge.Based on the formula of classic radial force and taking into account the distribution range of the prestressed steel of bottom plate and the actual size of bridge,it choo-ses five bridges with different span sizes to analyze the sensitivity of radial force parameters.The results show that no matter what span,when the parabolic index of the bottom plate curve changes from 1.5,1.8 and 2.0,the radial force changes greatly.Secondly,taking into account the positioning error and the influ-ence of the construction method of"direct generation"on the radial force,the formula of classical radial force was revised.The results show that the increasing coefficient of radial force under different spans is different,and the tensile radial force is inversely proportional to the division of construction section length.Anti-collapse steel bars should be differentiated according to the region settings.The related research can calculate the radial force accurately and provide a reference for the next step of continuous rigid frame design work.
关键词
连续刚构桥/底板/纵向裂缝/预应力钢束/张拉径向力
Key words
Continuous rigid frame bridge/Bottom plate/Longitudinal crack/Prestressed steel strand/Ten-sile radial force
维普
万方数据