Predictive Model of Subgrade Deformation Beneath Aluminum Sandwich Panel
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摘要: 为了分析飞机重复荷载作用时拼装式道面板下土基塑性变形情况,对4种不同厚度、强度的蜂窝铝夹芯道面板进行了足尺通行加载试验,测试了土基在不同轮载作用次数下的塑性变形.通过数据拟合分析确定了特定铝道面板下土基变形关于通行次数及基层强度的简化模型.对简化模型进行修正后,将新模型与其他传统预估模型进行了对比,结果表明:土基变形与通行次数的对数成正比例关系,与土质道面强度成反比例关系,道面板D铺设在高强度基层上时,道面板的疲劳开裂是道面结构失效的主要原因;道面板D铺设在70 MPa的基层上时,采用沥青道面设计公式、美军土质道面设计公式、本文推导公式分别计算得出的最大通行次数为4.071013、288、487990次.Abstract: In order to study the subgrade deformation beneath the sandwich panel which was subjected to repeated aircraft load, four aluminum honeycomb sandwich panels with different thickness and strength were trafficked and the soil plastic deformation was surveyed. The performance data were analyzed and presented graphically to build a simple predictive model including traffic times and base strength. The simplify model was revised and compared with conventional models. The results show that the soil deformation is in proportion to the logarithm of times, and inversely proportional to base strength. Fatigue cracking is the main failure reason of pavement structures. The maximum traffic times calculated by three different design equations are 4.071013, 288, and 487 990 respectively when pavement D is installed over the soil with 70MPa strength.
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Key words:
- expedient airfield /
- aluminum pavement /
- aircraft load /
- traffic loading test /
- subgrade /
- deformation /
- predictive model
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GARTRELL C A, NEWMAN J K, ANDERTONG L. Performance measurements of pavement matting systems by full-scale testing over differing soil strengths[J]. Journal of Materials in Civil Engineering, 2009, 21(10):561-568. DOYLE J D, HOWARD I L, GARTRELL C A, et al. Full-scale instrumented testing and three-dimensional modeling of airfield matting systems[J]. International Journal of Geomechanics, 2014, 14(2):161-170. GARTRELL C A. Full-scale instrumented testing and analysis of matting systems for airfield parking ramps and taxiways[R]. Vicksburg, MS:ERDC, 2007. FOSTER D C. Decks for rapid runway mat application[R]. Wright-Patterson AFB, Ohio:Air Force Research Laboratory, 2007. 刘军忠,翁兴中,张俊,等. 应急机场土质道面疲劳变形特性模型试验[J]. 西南交通大学学报,2014,49(3):412-418.LIU Junzhong, WENG Xingzhong, ZHANG Ju, et al. Model experiment of fatigue deformation characteristic of emergency soil airfield pavement[J]. Journal of Southwest Jiaotong University, 2014, 49(3):412-418. 许巍,岑国平,戴经梁. 简易机场道面结构的疲劳特性试验[J]. 交通运输工程学报,2008,8(6):40-43.XU Wei, CEN Guoping, DAI Jingliang. Fatigue characteristic experiments of field airfield pavement structure[J]. Journal of Traffic and Transportation Engineering, 2008, 8(6):40-43. RUSHING T W, TINGLE J S. Full-scale evaluation of mat surfacings for roads over sand subgrades[J]. Journal of Terramechanics, 2009, 46(3):57-63. 郝伟,蔡良才,王振辉,等. 应急起降跑道复合式道面结构设计与施工技术研究[J]. 施工技术,2008,37(7):30-32.HAO Wei, CAI Liangcai, WANG Zhenhui, et al. Research on design and construction technology of composite pavement structure in emergency operating runway[J]. Construction Technology, 2008, 37(7):30-32. 邱延峻,孙振堂. 柔性路面路基土的永久变形[J]. 西南交通大学学报,2000,35(2):115-120.QIU Yanjun, SUN Zhentang. Permanent deformation of subgrade soils in flexible pavement[J]. Journal of Southwest Jiaotong University, 2000,35(2):115-120. 彭妙娟,许志鸿. 沥青路面车辙预估方法[J]. 同济大学学报:自然科学版,2004, 32(11):1457-1460.PENG Miaojuan, XU Zhihong. Methods of rutting prediction in asphalt pavements[J]. Journal of Tongji Univeristy:Natural Science, 2004, 32(11):1457-1460. FOSTER C R, BURNS C D. Development of tentative cbr design curves for landing mats[R].Vicksburg, MS:U.S. Army Corps of Engineers Waterways Experiment Station, 1952. GONZALEZ C R, RUSHING T W. Development of a new design methodology for structural airfield mats[J]. International Journal of Pavement Research and Technology, 2010, 3(3):102-109. BARBER V C, ODOM E C, PATRICK R V. Deterioration and reliability of pavements technical[R]. Vicksburg, MS:U.S. Army Waterways Experiment Station, 1978. CHOU Y T. Design criteria for aggregate-surfaced roads and airfield[R]. Vicksburg, MS:U.S. Army Waterways Experiment Station, 1989. 岑国平,程传龙,许巍,等. 铝蜂窝道面板承载能力试验[J]. 空军工程大学学报,2014,15(4):1-4.CEN Guopin,CHENG Chuanlong, XU Wei, et al. Experimental study on the bearing capacity of the aluminum honeycomb sandwich panel[J]. Journal of Air Force Engineering University, 2014,15(4):1-4. 史保华,宁文溥,许巍,等. 抗耐土壤稳定剂在简易机场道面中的应用[J].交通运输工程学报,2013,13(2):25-33.SHI Baohua, NING Wenpu, XU Wei, et al. Application of con-aid stabilizer in expedient airfield pavement[J]. Journal of Traffic and Transportation Engineering, 2013, 13(2):25-33. RUSHING T W, TINGLE J S. AM2 and M19 airfield mat evaluation for the RPRE program[R]. Vicksburg, MS:ERDC, 2006. 沈祖炎,郭小农,李元齐. 铝合金结构研究现状简述[J]. 建筑结构学报,2007,28(6):100-109.SHEN Zuyan, GUO Xiaonong, LI Yuanqi. State-of-the-arts of research on aluminum alloy structure[J]. Journal of Building Structure, 2007, 28(6):100-109. RUSHING T W, MASON Q S. 2008. AM215 CBR subgrade sensitivity test for the rapid parking ramp expansion program[R]. Vicksburg, MS:ERDC, 2008.
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