设防水层的混凝土桥沥青铺装结构

选取典型实心板、T梁、箱梁三种桥梁形式,用有限元法分析不同桥型在简支和连续几跨边界条件、承受汽超 20作用下沥青铺装层的不同受力特征;主要计算铺装层拉应力,接触层间剪应力和法向拉拔力。针对典型的箱梁,比较分析铺装层和桥面板间完全连续和滑动摩擦接触;直线梁桥和曲线梁桥的铺装;平坡桥和设有纵坡桥梁的铺装;分析了应力对铺装厚度的敏感性,提出沥青铺装设计指标。

Structure of AC Pavement with Waterproof Layer on Concrete Bridges

Selecting the typical slab,T beam and Box beam bridges under vehicle loads,with FEA,the article analyzes the mechanistic response of AC pavement on different types of simple-supported or continuous-supported bridges.It computes the tensile stress,interface shearing stress and interface normal tensile stress.Based on the simple-supported box beam,it has analyzed and compared the various pavement responses when continuously and frictionally contacted to the bridge decks,paved on straight-lined bridges and curved bridges,and paved on level bridges and inclined bridge.Furthermore,it analyzes the stress sensitivity to pavement thickness and proposes the design index.