摘要
为优化刚性路面的传力杆设置,建立了Winkler地基上考虑层间接触状况的双层结构模型,计算了传力杆几何尺寸、空间位置、与混凝土结合状况及布设方式对接缝传荷能力、传力杆内力和板底应力的影响。结果表明:增加传力杆直径、长度不能有效提高提高传荷能力;弯沉传荷系数随传力杆竖直偏角的增大线性减小,随传力杆支撑模量的增大呈指数增大,随松动量的增大呈二次曲线下降;传力杆数量相同时,布设在轮迹带上与沿横缝均匀布设的传荷能力近似相同,达到一定数量后传荷能力不再因布设位置、层数明显变化。此外,一般的,弯沉传荷系数越大,传力杆内力越大,同时面层底部的最大应力越小。
In order to optimize dowel bar setting in rigid pavement, a double-layer structure model on Winkler subgrade considering interlayer contact situation is established. The effect of physical dimension, position, combination with concrete and setting mode of dowel bar on load-transfer capacity of joints, internal stress of dowel bar and stress of slab bottmn is analyzed. The results show that （ 1 ） increase diameter and length of dowel bar cannot effectively enhance the load-transfer capacity; （2） load transfer coefficient decreases linearly with increase of dowel bar＇s vertical angle, exponential grows with increase of dowel bar＇s supporting modulus, and conical decreases with increase of dowel bar＇s looseness; （3） the transfer capacity is approximately the same when an equal number of dowel bar laid on the wheel track belt or laid evenly along the transverse joint, transfer the capacity does not change significantly due to the setting position and layer when the quantity of dowel bar reaches a certain amount; （4） generally, the larger the load transfer coefficient, the larger the internal stress of dowel bar, meanwhile, the smaller the stress of slab bottom.
出处
《公路交通科技》
CAS
CSCD
北大核心
2013年第4期22-27,共6页
Journal of Highway and Transportation Research and Development
基金
山西省交通建设科技项目(2011-02-19)
关键词
道路工程
传力杆设置
有限元
传荷能力
层间接触状况
road engineering
dowel bar setting
finite element
load-transfer capacity
interlayer contactsituation
