立转式开启桥钢桥面铺装结构的应力状态分析  

Analysis of Stress of Steel Deck Pavement Structure on Bascule Bridge

作　　者：刘云[1] 钱振东[2] 

机构地区：[1]河海大学土木与交通学院,江苏南京210098 [2]东南大学智能运输系统研究中心,江苏南京210096

出　　处：《公路交通科技》2014年第1期55-60,66,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51308193);中国博士后基金项目(20110491342);江苏省博士后基金项目(1101018C)

摘　　要：采用有限单元方法，建立了开启桥钢桥面铺装体系复合结构模型，计算了在通车运营及通航开启2种状态下的铺装层应力，并通过室内试验测试了完全固化和室温自然养生等2种养生条件下的复合结构层间剪切强度。研究结果表明，开启状态下的铺装层与钢板之间层间剪应力增加幅度明显大于通车运营条件下的计算结果，开启桥钢桥面适宜采用厚度为30—40mm的沥青混和料铺装层；通车运营及通航开启2种工况下的铺装层与钢板之间层间剪应力随着铺装模量的增加都呈明显上升趋势，建议铺装层施工应在高温条件下进行，通车及开启前的养护阶段都应保持高温条件。By using finite element method, the composite structure model of the steel deck pavement system on bascule bridge is built, and the pavement stresses under vehicle load and in opening process are calculated. The interlaminar shear strength between steel deck and waterproof adhesive layer cured at room temperature and fully cured a tested by indoor test. The results show that （ 1 ） the shear stress increment between pavement and steel deck in opening process is significantly larger than that under vehicle load. The asphalt mixture pavement with the thickness of 30 - 40 mm is fit for the bascule bridge ; （ 2 ） the shear stresses between pavement and steel deck under the 2 kinds of operating conditions rise with the increase of pavement modulus, and the maintenance before the bridge service under vehicle load and in opening process should be performed under high temperature condition.

关 键 词：桥梁工程 应力状态 有限单元法 钢桥面铺装 立转式开启桥 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]