[1]张润峰,戚春香,张献民,等.考虑机场道面结构损伤的传力杆设计修正方法[J].长安大学学报(自然科学版),2019,39(05):28-38.
　ZHANG Run feng,QI Chun xiang,ZHANG Xian min,et al.Dowel bar design and modified method considered airport pavement structure damage[J].Journal of Chang’an University (Natural Science Edition),2019,39(05):28-38.
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考虑机场道面结构损伤的传力杆设计修正方法()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第39卷
期数:
2019年05期
页码:
28-38
栏目:
道路工程
出版日期:
2019-09-15

文章信息/Info

Title:
Dowel bar design and modified method considered airport pavement structure damage
作者:
张润峰; 戚春香; 张献民; 高玉换
（中国民航大学 机场学院，天津 300300）
Author(s):
ZHANG Runfeng;  QI Chunxiang;  ZHANG Xianmin;  GAO Yuhuan
(Airport College, Civil Aviation University of China, Tianjin 300300, China)
关键词:
道路工程; 机场工程; 传力杆; 三维有限元模型; 敏感性分析; 传荷性能
Keywords:
road engineering;  airport engineering;  dowel bar;  3D finite element;  sensitivity analysis;  load transfer performance
文献标志码:
A
摘要:
为了减少机场道面结构损伤对接缝传荷性能的影响，基于相似理论，分别对传力杆松动和板底脱空2种损伤形式下，道面板受荷性能进行了模型试验研究。同时，采用ABAQUS有限元软件建立了接缝设传力杆的机场水泥混凝土道面结构三维有限元模型，对道面结构损伤模型试验进行了模拟。进一步，针对不同尺寸的传力杆松动、板中脱空和板角脱空，采用有限元方法分析了道面板在7种水平的传力杆长度、直径和间距下的传荷性能，以及2种结构损伤形式下传力杆参数对传荷性能的敏感性。在此基础上，以接缝剪力传递系数、关键传力杆分配系数、板底弯拉应力幅值以及界面应力为控制指标，分别分析了当道面板存在传力杆松动和板底脱空损伤时，相对于未损伤工况，提高传力杆参数尺寸对上述指标增长率的改善程度，进而提出了考虑道面结构损伤的传力杆参数设计范围，并与《民用机场水泥混凝土道面设计规范》（MN/T 5004—2010）（简称规范，下同）进行比较。结果表明：位移传荷系数LTEδ随脱空尺寸的增加先减小后增大，随着松动尺寸的增大逐渐降低，且2种结构损伤模型试验结果与有限元模拟规律一致；传力杆直径对松动损伤最敏感，而传力杆间距对板底脱空的敏感性最大；随着传力杆直径和间距的增加，控制指标增长率均呈现先减小后小幅增加并趋于稳定的趋势，说明当考虑道面结构损伤时，增加传力杆直径和减小其间距只能在一定范围内改善传荷性能。因此，对应不同板厚，考虑松动损伤的传力杆直径建议值为规范值的110%～130%，而考虑板底脱空损伤时传力杆间距建议值为规范最大值的70%～98%。
Abstract:
To reduce the impact of airport pavement structure damage on the load transfer performance of joints, model tests of load transfer performance with two kinds of damage, namely the looseness of the dowel bar and the slab void, were investigated based on the similarity theory. In addition, the threedimensional finite element model of the airport cement concrete pavement structure with a joint dowel bar was established using ABAQUS finite element software, and the damage model test of pavement structure was simulated. Furthermore, the load transfer performance of the pavement slab was analyzed under seven levels of length, diameter, and spacing of the dowel bar. The sensitivity of the dowel bar parameters to load transfer performance under two kinds of structural damage were also analyzed using the finite element method for different degrees of dowel bar looseness, slab void size, and slab corner void size. On this basis, considering the joint shear transfer coefficient, distribution coefficient of the key dowel bar, bending stress amplitude at the bottom of the slab, and interface stress as control indexes, the rule of the above index growth rate with the increase in size of the dowel bar parameter was analyzed when the looseness of the dowel bar and the slab void damage existed, compared with the nondamage condition. Furthermore, the design range of the parameters of the dowel bar considering the damage of the pavement structure was proposed and compared with the code of Specifications for airport cement concrete pavement design (MN/T 5004—2010). The results show that the displacement load transfer coefficient LTEδ decreases first and then increases with an increase of the void size, and it decreases gradually with the increase of the looseness. The experimental results of the two structural damage models are consistent with the finite element simulation law. The diameter of the dowel bars is the most sensitive to the loose damage, and the dowel bar spacing is the most sensitive to the slab void. With an increase in diameter and spacing of the dowel bar, the growth rate of the control index decreases first, then increases slightly and finally tends to be stable. It shows that when considering the damage of pavement structure, increasing the diameter of the dowel bar and reducing its spacing can only improve its load transfer performance within a certain range. According to different slab thicknesses, the recommended value of the dowel bar diameter, considering the loose damage, is 110% to 130% of the maximum value of the code, and considering the slab void damage, the recommended value of the dowel bar spacing is 70% to 98% of the maximum value of the code. 5 tabs, 16 figs, 24 refs.

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更新日期/Last Update: 2019-10-16