中国民航大学学报

• 民用航空 • 上一篇    下一篇

传力杆松动对道面接缝传荷影响的试验研究

张润峰,崔晓云,杨简   

  1. (中国民航大学机场学院,天津300300)
  • 收稿日期:2016-04-20 修回日期:2016-06-20 出版日期:2017-02-25 发布日期:2017-04-10
  • 作者简介:张润峰(1979—),男,河北宁晋人,讲师,硕士,研究方向为机场道面结构分析与维护管理.
  • 基金资助:

    中央高校基本科研业务费专项(3122015D014);中国民航机场工程研究基地开放基金(KFJJ2014JCG09);中国民航大学研究生科技创新基金项目(10120131202)

Experimental study on affection of loose dowel to load transfer of pavement joints

ZHANG Runfeng, CUI Xiaoyun, YANG Jian   

  1. (College of Airport Engineering, CAUC, Tianjin 300300, China)
  • Received:2016-04-20 Revised:2016-06-20 Online:2017-02-25 Published:2017-04-10

摘要:

按一定的缩放比例浇筑水泥混凝土道面板结构模型,接缝处设有传力杆且具有不同松动长度。通过不同加载等级进行相关数据测定,研究不同松动长度下道面板的位移传荷系数及传力杆和接缝界面混凝土的力学特征,得出荷载较小时,接缝传荷系数变化不明显,当达到1~3 kN 时,传荷系数明显增大,超过5 kN 后,传荷系数相对平稳;传力杆松动长度在0~10 cm 时,接缝的传荷系数及杆与混凝土界面的混凝土应变随松动长度的增大逐渐减小,传力杆上的剪切应变先增大后减小,当松动长度超过10 cm 后,各指标变化不再明显。

关键词: 接缝, 传力杆松动, 传荷系数, 加载等级

Abstract:

The cement concrete pavement slab structure model is poured by a certain scale, and the joint is provided with dowels and have different loosening lengths. Using different loading levels to determinate relevant data, load transfer coefficient and mechanical characteristics between dowel and pavement concrete under different loose lengths are studied. Results show that when load is small, the joint load transfer coefficient does not change significantly; When it reaches 1~3 kN, load transfer coefficient increases significantly; When it is bigger than 5 kN,load transfer coefficient is relatively stable. When dowel loose gap length reachs 0~10 cm, concrete strain joints,load transfer coefficient rod and concrete interface gradually decrease as the loose length increases, shear strain of dowelincreasesfirstlyandthendecreases.Sincetheloosegapiswiderthan10cm,anyindexhasnoobviouschange.

Key words: joints, loose dowel, load transfer coefficient, load rating

中图分类号: