摘要
采用Winkler地基不等平面尺寸双层板模型,分析了层间接触条件、基层超宽、结构组合等对接缝弯沉传荷效率LT及应力折减系数λσ的影响。比较了双层路面结构与单层路面结构在基层超宽情况下,接缝弯沉传荷效率LT及应力折减系数λσ的差异。结果表明,层间结合,基层超宽、结构组合变化对LT和λσ的影响很小;层间可分离,基层超宽、结构组合变化对LT和λσ的影响比较显著。揭示了基层超宽在层间接触可分离情况下,弯沉传荷效率变幅ΔLT及应力折减系数变幅Δλσ随接缝剪切刚度Cw的变化规律。分析结果可用于水泥混凝土路面接缝传荷评价。
Using a mechanistic model of double-layered pavement structure with unequal plannar dimension resting on Winkler foundation, the influences of slab/base interface condition, base extension and structure combinations on the deflection-based load transfer efficiency LT and stress reduction factor λσ are analyzed. The differences of deflection-based load transfer efficiency LT and stress reduction factor λσ for a double-layered with base extension and a single-layered pavement structure are compared. The results show that in unbonded slab/base interface condition the influences of base extension and structural combination on LT and λσ are significant, whereas in bonded slab/base interface condition, the influences of base extension and structure combination can be neglected. Morover, in unbonded slab/base interface condition, the rules of deflection-based load transfer efficiency variation-ALr and stress reduction factor variation △ λσchanging with the joint shearing stiffness Cw are illustrated. However, the resulants can be used to evaluate the joint load transfer capability of cement concrete pavements.
出处
《公路》
北大核心
2010年第5期76-82,共7页
Highway
基金
西部交通建设科技项目
项目编号200731822301-9
关键词
道路工程
水泥混凝土路面
弯沉传荷效率
应力折减系数
接缝剪切刚度
基层超宽
road engineering
cement concrete pavements
deflection-based load transfer efficiency
stress reduction factor
joint shearing stiffness
base extension
