斜向连续布筋横向预应力路面的温缩问题  

Analysis of Temperature Shrinkage of Continuous Oblique-Reinforced Transverse Prestressed Concrete Pavement

作　　者：才华[1] 苗健[1] 江科[1] 段玉兵 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]沈阳顺天建设集团有限公司,辽宁沈阳110042

出　　处：《沈阳建筑大学学报（自然科学版）》2013年第1期98-103,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51078242);辽宁省交通厅重点科研项目(201112)

摘　　要：目的为解决传统水泥混凝土路面中因热胀冷缩导致的各种横缝问题.方法应用Abaqus有限元软件建立不同配筋形式的无缝路面板,模拟在温降作用下路面板的受力及变形情况,并进行对比分析.结果斜向布筋横向预应力水泥混凝土路面可以利用斜向钢筋的变形转换能力,通过横向施加预应力即可以使水泥路面沿纵向也产生预应力,进而有效抵消沿行车方向产生的温缩应力.当对斜向配筋路面板施加适当的横向预应力后,即使路面板受50℃的温降作用,板中都不会出现温缩应力.结论斜向连续布筋横向预应力技术可为无横缝水泥混凝土路面的可行性研究提供相应理论支撑.In order to solve the problem that common concrete pavement has to build transverse joints for its properties of expansion and contraction,a new type of pavement slab named continuous oblique-reinforced transverse prestressed concrete pavement is proposed.In this paper,its mechanical and deformation behaviors under the influence of temperature drop are compared with other structure forms of pavements by FEM software Abaqus.Analysis results show that oblique-reinforced transverse prestressed concrete pavement could take advantage of deformation transfer competence of oblique steels,and while applying prestressing force on slab along transverse direction,longitudinal prestressing force appears which would effectively counteract temperature shrinkage stress along driving direction.Thus this paper provides corresponding theoretical support for the feasibility study on jointless concrete pavement.

关 键 词：道路工程 预应力路面 有限单元法 温缩应力 斜向布筋 横向预应力 

分 类 号：U416.216.1[交通运输工程—道路与铁道工程]