混凝土简支箱梁桥面铺装在三角垫层影响下应力分析  

Analysis to Stress of Simple-supported Box Girder Deck Pavement under the Effect of Concrete Cushion

作　　者：王虎[1] 韩飞[1] 王勋涛[1] 

机构地区：[1]长安大学理学院,西安市710064

出　　处：《公路》2015年第10期64-68,共5页Highway

基　　金：陕西省自然科学基金项目;项目编号2013GM7002

摘　　要：采用三维有限元分析程序,对混凝土简支箱梁桥实体建模,考虑车辆荷载作用的最不利荷载位置,分析研究了荷载偏心作用下混凝土垫层厚度以及横坡坡度变化对沥青铺装层与水泥混凝土垫层接触层间应力的分布规律。分析表明,随着垫层厚度以及横坡坡度增加,沥青铺装层内第一主应力、层间法向拉拔力、顺桥向及横桥向剪切应力均有所降低,但垫层最薄处厚度不宜低于3cm。考虑结构恒载因素,垫层厚度也不宜太大,建议对于混凝土简支箱梁桥三角垫层最小厚度设计值采用3～4cm,垫层横坡坡度范围宜采用2%～3%。In this paper,finite element analysis program is used to analyze distribution regularity of stress among asphalt and cement concrete cushion at the thinnest thickness of concrete cushion and transverse slope degree under the action of eccentric load which is applied in the most critical position.The result indicates that the interface normal tensile stress,the first principal stress and the interface shear stress reduce when the cushion layer thickness and transverse slope degree increase,however,the thinnest thickness of cushion should not be less than 3cm.Considering the total weight of structure,cushion thickness should not be too large either,the thinnest cushion thickness of simply-supported box girder bridge pavement layer is recommended for 3-4cm while transverse slope is for 2%-3%.

关 键 词：桥梁工程 桥面铺装 三角垫层 拉应力 剪应力 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]