【摘要】 为了研究混凝土桥混凝土铺装层病害机理,用有限元法分析不同桥型在车辆荷载作用下水泥铺装层的不同受力特征;着重分析了铺装层拉应力、接触层间剪应力及层间法向分离拉应力。针对典型箱梁,分析了铺装层和桥面板间完全连续、完全光滑和滑动摩擦3种不同接触类型;连续铺装和划缝、带裂缝配筋工作状态;分析应力对铺装厚度的敏感性。结果表明,水泥铺装应以铺装层上表面抗拉强度、层间抗剪强度和法向分离强度作为设计指标,不同桥梁采用不同的铺装厚度。更多还原

【Abstract】 For researching the damage of concrete pavement on concrete bridges, the mechanistic performance of bridge overlay under vehicles was analyzed with FEA. The tensile stress, interface shear stress and interface normal pulling stress were computed. With an example of a typical box beam, the pavement responses was analyzed when the interface was bonded or frictionally sliding; the pavement stress sensitivity to the pavement thickness was researched. The results show that surface anti-tensile strength、 interface anti-shear strength and normal seperate strength are three important indices for designing of concrete pavement, different bridges should have different pavement thickness.8 tabs, 15 figs,6 refs.更多还原