Analyses of structural damage and parameter sensitivity for CRCP+AC composite pavement
-
摘要: 分析了CRCP+AC复合式路面结构塑性损伤, 研究了不同荷载作用条件下结构应力与损伤的空间分布规律。利用正交试验方法, 以结构的拉张损伤作为考察指标, 对多种复杂的结构因素与环境因素进行了参数敏感性分析, 得到了各因素影响规律。根据极差、方差分析结果, 区分了变温作用、温度与荷载耦合作用条件下的主要与次要因素, 并依据影响效果进行了次序排列。研究结果表明: 结构损伤在CRCP面板深度范围内的分布存在差异, 导致拉应力的差异化分布; 重复行车荷载作用时, 随着结构应力软化现象的加剧, 结构损伤在初期呈现台阶式上升趋势, 后期则增长平稳; 根据结构最大塑性主应变的矢量方向可判断结构裂缝平面的法向; 综合考量不同荷载作用的分析结果, 沥青面层厚度、混凝土的线膨胀系数与面板的支撑情况是影响CRCP结构损伤最为重要的因素。
-
关键词:
- 道路工程 /
- CRCP+AC复合式路面 /
- 结构损伤分析 /
- 正交试验 /
- 参数敏感性
Abstract: The structural plasticity damage of continuous reinforcement concrete pavement (CRCP) and asphalt concrete (AC) composite pavement was analyzed, the spatial distribution laws of structural stresses and damages under different loading conditions were studied.Orthogonal test method was used, the structural tensile damage was taken as an index, the parameter sensitivity analyses with a variety of complex structural and environmental factors were employed to obtain factor influencing laws.Based on the results of variance and range analyses, the primary and secondary factors were distinguished and ordered with their various influencing effects under temperature changing or temperature-load coupling conditions.Analysis result shows that there are differences in the distribution of structural damage along the depth range of CRCP slab, which lead to the difference distribution of tension stress.When repeated traffic loading is applied, the trend of structural damage steps up in the initial stage and is steady growth in the later stage with the intensification of structural stress softening.The normal direction of structural crack plane can be judged by the vector direction of maximum plasticity principal strain.Based on the comprehensive consideration of analysis results under different loading conditions, the thickness of asphalt layer, the linear expansion coefficient of concrete and the support state under CRCP slab are the most important influencing factors associated with the structural damage of CRCP. -
图 7 结构损伤与拉应力时程曲线
Figure 7. Time-history curves of structural damage and tensile stress
图 10 CRCP面板表面拉应力分布与等值线
Figure 10. Tensile stress distribution and isograms on CRCP slab surface
图 11 CRCP面板底面拉应力分布与等值线
Figure 11. Tensile stress distribution and isograms on CRCP slab bottom
图 12 CRCP面板最大塑性主应变矢量
Figure 12. Vectors of maximum plasticity principal strain for CRCP slab
表 5 变温作用条件下各因素影响水平
Table 5. Effect level of each factor under temperature changing condition
下载: 导出CSV
表 6 变温作用条件下正交试验方差分析
Table 6. Variance analysis of orthogonal test under temperature changing condition
下载: 导出CSV
表 7 变温作用条件下各因素的影响次序与效果
Table 7. Order and effect of each factor under temperature changing condition
下载: 导出CSV
表 8 温度与荷载耦合作用下CRCP表面各因素影响水平
Table 8. Effect level of each factor on CRCP surface under temperature-load coupling condition
下载: 导出CSV
表 9 温度与荷载耦合作用下CRCP底面各因素影响水平
Table 9. Effect level of each factor on CRCP bottom under temperature-load coupling condition
下载: 导出CSV
表 10 0温度与荷载耦合作用下CRCP表面正交试验方差分析
Table 10. Variance analysis of orthogonal test on CRCP surface under temperature-load coupling condition
下载: 导出CSV
表 11 1温度与荷载耦合作用下CRCP底面正交试验方差分析
Table 11. Variance analysis of orthogonal test on CRCP bottom under temperature-load coupling condition
下载: 导出CSV
表 12 2温度与荷载耦合作用下各因素的影响次序与效果
Table 12. Order and effect of each factor under temperature-load coupling condition
下载: 导出CSV
-
[1] 陈宝银, 何山清, 蔡光华, 等. 浅谈旧混凝土路面沥青加铺层设计[J]. 武汉工业学院学报, 2011, 30 (2): 78-81. https://www.cnki.com.cn/Article/CJFDTOTAL-WHSP201102019.htmCHEN Bao-yin, HE Shan-qing, CAI Guang-hua, et al. The review on the design of asphalt overlay on old concrete pavement[J]. Journal of Wuhan Polytechnic University, 2011, 30 (2): 78-81. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-WHSP201102019.htm [2] 叶丹, 于天, 韩样. CRCP加HMA加铺层荷载应力分析[J]. 常德师范学院学报: 自然科学版, 2003, 15 (2): 46-48. https://www.cnki.com.cn/Article/CJFDTOTAL-CDSZ200302016.htmYE Dan, YU Tian, HAN Yang. Stress analysis of continiously reinforced concrete pavement with asphalt overlay[J]. Journal of Changde Teachers University: Natural Science Edition, 2003, 15 (2): 46-48. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-CDSZ200302016.htm [3] 李英涛. 隧道内复合式路面沥青层混合料剪应力设计方法研究[J]. 公路, 2007 (3): 7-11. https://www.cnki.com.cn/Article/CJFDTOTAL-GLGL200703003.htmLI Ying-tao. Research on shear stress design method for composite pavement asphalt course mixture in highway tunnel[J]. Highway, 2007 (3): 7-11. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GLGL200703003.htm [4] 倪富健, 卢杨, 顾兴宇, 等. 沥青混凝土与连续配筋混凝土复合式路面承载力分析[J]. 交通运输工程学报, 2007, 7 (1): 43-48. doi: 10.3321/j.issn:1671-1637.2007.01.010NI Fu-jian, LU Yang, GU Xing-yu, et al. Carrying capacity analysis of asphalt concrete and continuously reinforced concrete composite pavement[J]. Journal of Traffic and Transportation Engineering, 2007, 7 (1): 43-48. (in Chinese). doi: 10.3321/j.issn:1671-1637.2007.01.010 [5] 顾兴宇, 董侨, 倪富健. 连续配筋水泥混凝土路面裂缝发展规律研究[J]. 公路交通科技, 2007, 24 (6): 37-40, 45. doi: 10.3969/j.issn.1002-0268.2007.06.009GU Xing-yu, DONG Qiao, NI Fu-jian. Research on crack progression of continuously reinforced concrete pavement[J]. Journal of Highway and Transportation Research and Development, 2007, 24 (6): 37-40, 45. (in Chinese). doi: 10.3969/j.issn.1002-0268.2007.06.009 [6] 陈锋锋, 黄晓明, 单景松. 复合式路面CRCP疲劳损耗临界荷位处荷载应力研究[J]. 中国市政工程, 2008, 6 (3): 4-6. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGSZ200803004.htmCHEN Feng-feng, HUANG Xiao-ming, SHAN Jing-song. Studies on load stress at loading position critical to fatigue loss on CRCP composite pavement[J]. China Municipal Engineering, 2008, 6 (3): 4-6. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-ZGSZ200803004.htm [7] WANG Bin, YANG Jun. Analysis of the dynamic responses of CRCP and CRCP+AC under the vehicle loading by FEM[C]∥ASCE. Proceedings of the Symposium on Pavement Mechanics and Materials. Minneapolis: ASCE, 2009: 131-139. [8] 宋福春, 才华, 于铃, 等. 沥青路面非线性瞬态温度场的分析[J]. 沈阳建筑工程学院学报: 自然科学版, 2003, 19 (4): 264-267. https://www.cnki.com.cn/Article/CJFDTOTAL-SYJZ200304006.htmSONG Fu-chun, CAI Hua, YU Ling, et al. Nonlinear analysis for transient temperature field of asphalt pavement[J]. Journal of Shenyang Architectural and Civil Engineering University: Natural Science, 2003, 19 (4): 264-267. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-SYJZ200304006.htm [9] 田寅春, 胡长顺, 王秉纲. 连续配筋混凝土路面荷载应力分析[J]. 西安公路交通大学学报, 2000, 20 (3): 6-10. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200003002.htmTIAN Yin-chun, HU Chang-shun, WANG Bing-gang. Analysis of the load stress of continuously reinforced concrete pavement (CRCP)[J]. Journal of Xi'an Highway University, 2000, 20 (3): 6-10. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200003002.htm [10] 周晓光, 李为民, 陈刚, 等. 一种近正交试验设计方法[J]. 空军工程大学学报: 自然科学版, 2010, 11 (3): 84-88. https://www.cnki.com.cn/Article/CJFDTOTAL-KJGC201003020.htmZHOU Xiao-guang, LI Wei-min, CHEN Gang, et al. A method of nearly orthogonal experimental design[J]. Journal of Air Force Engineering University: Natural Science Edition, 2010, 11 (3): 84-88. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-KJGC201003020.htm [11] LUBLINER J, OLIVER J, OLLER S, et al. A plastic-damage model for concrete[J]. International Journal of Solids and Structures, 1989, 25 (3): 299-329. [12] LEE J, FENVES G L. Plastic-damage model for cyclic loading of concrete structures[J]. Journal of Engineering Mechanics, 1998, 124 (8): 892-900. -
点击查看大图
计量
- 文章访问数: 608
- HTML全文浏览量: 141
- PDF下载量: 671
- 被引次数: 0
