体外预应力加固钢转向装置参数分析

Parameter analysis of steel steering device in external prestressed reinforcement

为研究体外预应力加固细部构造参数对钢转向装置受力性能的影响,运用ANSYS软件建立某预应力混凝土连续梁桥钢转向装置的细部构造计算模型。通过控制不同的参数组合,在ANSYS软件中分析,得到对应的转向钢管的应力极值和位移极值。研究结果表明:钢管壁厚从5 mm增加到7 mm时,钢管应力和变形减小幅度较大,从7 mm增加到9 mm时,应力和变形减小幅度较小;钢管长度从600 mm增加到800 mm时,钢管应力减少较明显,从800 mm增加到1000 mm时,应力变化不明显;内穿钢管距外套钢管两端的距离从0 mm增加到40 mm时,钢管应力和位移变化幅度较大,从40 mm增大到80 mm时,应力和位移的变化幅度很小;体外束竖弯角度从3°增加到7°时,钢管应力增大约2.3倍。研究结果可为类似工程转向装置的设计优化提供参考。

In order to study the influence of detailed structural parameters on the mechanical behavior of steel steering device in external prestressed reinforcement,the detailed structural calculation model of a prestressed concrete continuous girder steel steering device was established by ANSYS software.By controlling different combinations of parameters and analyzing in ANSYS software,the stress extremes and displacement extremes of the corresponding steering steel tubes are obtained.The results showed that when the wall thickness of the steel pipe increases from 5 mm to 7 mm,the stress and deformation of the steel pipe decrease greatly.When the wall thickness increases from 7 mm to 9 mm,the stress and deformation decrease slightly;When the length of the steel pipe increases from 600 mm to 800 mm,the stress of the steel pipe decreases more obviously.When the pipe length increases from 800 mm to 1000 mm,the stress change is not obvious;When the distance between the inner steel pipe and the ends of the outer steel pipe increases from 0 mm to 40 mm,the stress and displacement of the steel pipe changes greatly.When the distance increases from 40 mm to 80 mm,the change of stress and displacement is small;When the external beam bending angle increases from 3°to 7°,the stress of the steel pipe increases about 2.3 times.The research results can provide reference for the design optimization of similar engineering steering devices.