简支箱梁桥防水层接触分析

Contact Analysis of the Waterproof Layer of Simply Supported Box Girder Bridge

采用有限元软件ANSYS建立简支箱梁桥的足尺模型,层间采用接触方式进行计算.分析沥青层材料和防水层材料参数变化对防水层剪应力影响,层间不同脱空类型对防水层剪应力的影响.计算结果表明:增加沥青层厚度和弹模均能减少防水层的剪应力;增加防水层的厚度能减少防水层的剪应力,增加防水层弹模使防水层剪应力增加;增加铺装层层间粘聚力能减少防水层的剪应力;防水层与整平层之间存在脱空时,防水层容易破坏.

The full‐scale model of simply supported box girder bridge was established by the ANSYS software ,interlaminar contact analysis was applied in this model .The influence of the shear stress of the waterproof layer was analyzed with the changes of the upper and lower asphalt layers of material parameters and the changes of the waterproof layer of material parameters .The influence to the shear stress of the waterproof layer was analyzed with the different type of the void area between the layers . Numerical experiments illustrate that ：The shear stress of waterproof layer was decreased with the in‐creasing asphalt layer thickness and elastic modulus ;The shear stress of waterproof layer was de‐creased with the increasing waterproof layer thickness ,but increased with the increasing elastic modu‐lus of the w aterproof layer ;T he shear stress of w aterproof layer w as decreased as the interlaminar co‐hesive force of asphalt pavement was increased ;If the void area exists between the waterproof layer and the levelling course ,the w aterproof layers could be easily damaged .