波形钢腹板PC组合箱梁抗扭性能试验

通过试验的方法,研究波形钢腹板PC组合箱梁在偏心荷载作用下,挠度、横向位移、刚性扭转角、箱梁截面的翘曲应变、翘曲应力及波形钢腹板的附加剪应力的分布规律,以了解悬臂波形钢腹板PC组合箱梁在扭转作用下的力学性能。研究表明:波形钢腹板翘曲应变很小,可忽略不计;翘曲应力在底板上呈现明显的直线分布规律,且最大值出现在底板的角点处;波形钢腹板上的剪应力分布较均匀,附加剪应力在腹板上的分布也有类似的规律。

Experiment on torsion behaviors of pre-stressed concrete composite box girders with corrugated steel webs

In order to investigate mechanical properties of pre-stressed concrete composite box girders with corrugated steel webs under torsional loading,distribution of deflection,lateral displacement,rigid torsion angle,warp strain,warp stress,additional shear stress under eccentric loading were researched through the experiment.The research indicates that the warp strain of corrugated steel web is small.Warp stress of the pre-stressed concrete composite box girder is uniformly distributed on the bottom plate,and the maximum value is in the corner of the concrete bottom plate.Shear stress is uniformly distributed along the corrugated steel web,and the additional shear stress along the corrugated steel web has the similar distribution.