基于Hamilton原理的波形钢腹板PC箱梁力学性能仿真分析

Simulation analysis of mechanical properties of PC box girder with corrugated steel webs based on Hamilton principle

波形钢腹板PC箱梁由于腹板形式变化,导致其受力性能千差万别,为更深刻地理解波形钢腹板箱梁,以某波形钢腹板PC箱梁为研究背景,应用Hamilton原理并利用ABAQUS建立实体模型,对此类结构力学性能开展深入研究。结果表明:波形钢腹板PC箱梁相对传统结构的混凝土箱梁桥具备更强弯剪能力,受自重作用形成了较低的挠度,充分发挥了预应力效果。顶底板形成了较明显的纵向正应变,腹板处纵向正应变在0附近。增大横隔板厚度会提高桥梁自重,由此形成了更大的桥梁挠度。

In order to have a deeper understanding of corrugated steel web PC box girder,Hamilton principle and ABAQUS were used to establish a solid model to study the mechanical properties of this kind of structure.The results show that PC box girder with corrugated steel webs has stronger bending and shearing ability than traditional concrete box girder bridge.Under the action of dead weight,the deflection is lower and the effect of prestress is brought into full play.The longitudinal normal strain at the top and bottom formed obvious,and the longitudinal normal strain at the web was near 0.Increasing the diaphragm thickness will increase the dead weight of the bridge,thus forming a larger deflection of the bridge.