层间接触时空心板桥铺装层应力分析  

Stress Analysis of Deck Pavement for Hollow Slab Bridge under Interlaminar Contact Condition

作　　者：王勋涛[1] 封建湖[1] 王虎[1] 

机构地区：[1]长安大学理学院,西安市710064

出　　处：《公路》2017年第6期14-22,共9页Highway

基　　金：陕西省自然科学基金项目;项目编号2013JM7002

摘　　要：利用ANSYS软件对空心板桥模型进行了计算分析,该空心板桥模型的桥面铺装层间采用接触方式。文中分析了空心板桥横坡变化、铺装层厚度变化、铺装层弹性模量变化以及层间黏聚力变化对铺装层中各层应力的影响。计算结果表明:增加横坡坡度,调平层和沥青混凝土层的纵向剪应力明显增大;增加调平层厚度,沥青混凝土层和防水层的应力明显变化;增加调平层弹性模量,调平层的应力明显增加;增加防水层厚度,防水层纵横向拉应力都会减少;增加防水层弹性模量,防水层应力有明显增加,沥青混凝土层各应力明显减少;当沥青混凝土层厚度不大于12cm时,铺装层各层多数应力随沥青层厚度增加而减小;增加沥青层弹性模量,防水层纵横向拉应力明显减少,沥青层应力增加明显;当层间黏聚力大于0.125 MPa时,铺装层各层应力以及层间应力基本保持不变。An interlaminar contact model of the deck pavement for a hollow slab bridge is established and computed by the ANSYS software. The influences of the different layers of the deck pavement is analyzed with the changes of transverse slope, thickness of the deck pavement, elastic modulus of the deck pavement, and cohesive force between the layers. Results show that： the shear stress of the leveling course and that of asphalt concrete layer will increase with the increased transverse slope; the stresses of the asphalt concrete layer and the stresses of the waterproof layer will change obviously with the increase of the leveling course thickness; the stresses of the leveling course will increase obviously as the elastic modulus of the leveling course increase; the stresses of the waterproof layer will decrease obviously when the thickness of the waterproof layer increases; the stresses of the waterproof layer will increase obviously and the stresses of the asphalt concrete layer will decrease obviously when the elastic modulus of the waterproof layer increases; if the thickness of the asphalt concrete layer is not more than 12 cm, the most stress of the deck pavement will decrease with the increased thickness of the asphalt concrete layer; the stresses of the waterproof layer will decrease obviously and the stresses of increase obviously with the increased elastic modulus of asphalt concrete 1 between the layers is greater than 0. 125MPa, all kinds of stresses of the unchanged. the asphalt concrete layer will ayer; and if the cohesive force deck pavement almost remain unchanged.

关 键 词：空心板桥 桥面铺装 层间接触 拉应力 剪应力 摩擦应力 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]