不同填充材料的STC加筋体水平循环剪切试验及数值模拟
|
摘要
为研究不同填充材料对废旧轮胎柱(scrap tire columns,STC)加筋体循环剪切性能的影响,利用自行研制的土工合成材料循环剪切试验机,分别得到河砂、碎石、壤土3种填充材料的STC加筋体在竖向压力100 k Pa、最大水平剪应变2%条件下的循环剪切滞回曲线。试验结果表明:河砂、碎石STC的等效动剪切模量和等效阻尼比在数值上基本接近,且均优于壤土STC的动力参数,考虑到减振消能效果以及填筑过程的便利性,河砂STC具有较好的实际应用优势。采用ABAQUS有限元程序,分别选用Mohr-Coulomb、Mooney-Rivlin和Rebar本构模型来模拟土石填筑料、橡胶超弹性材料和帘线钢丝材料,数值重现了3种填筑料STC加筋体的应力-应变滞回曲线,数值模拟结果与试验结果的规律基本一致。由模拟所得的循环剪切过程中STC加筋体能量变化曲线可知:填充材料主要起"消能"作用,轮胎则主要起"加筋"作用。
To investigate the effect of filler types on cyclic shear behavior of scrap tire columns( STC) reinforced geomaterials,a series of horizontal cyclic shear tests,with a vertical pressure of 100 kPa and a maximum shear strain of 2%,were conducted on STC reinforced river sands,gravels and loam soils,respectively. Test results show that STC reinforced river sands and gravels almost have the same values of equivalent dynamic shear moduli and equivalent damping ratios,which are better than those of STC reinforced loam soils. In consideration of dynamic behavior and construction convenience,STC reinforced river sands have a good advantage in practical application.Moreover,the stress-strain hysteresis curves were reasonably established based on the FEM simulation by the code of ABAQUS. Constitutive models of Mohr-Coulomb,Mooney-Rivlin and Rebar were selected to simulate the mechanical behaviors of geomaterials,rubbers and rebars,respectively. From the simulated energy-time variation curves during the cyclic shear,it is found that the inside filling geomaterials mainly play a role of energy dissipation,and scrap tires mainly act for reinforcement.
To investigate the effect of filler types on cyclic shear behavior of scrap tire columns( STC) reinforced geomaterials,a series of horizontal cyclic shear tests,with a vertical pressure of 100 kPa and a maximum shear strain of 2%,were conducted on STC reinforced river sands,gravels and loam soils,respectively. Test results show that STC reinforced river sands and gravels almost have the same values of equivalent dynamic shear moduli and equivalent damping ratios,which are better than those of STC reinforced loam soils. In consideration of dynamic behavior and construction convenience,STC reinforced river sands have a good advantage in practical application.Moreover,the stress-strain hysteresis curves were reasonably established based on the FEM simulation by the code of ABAQUS. Constitutive models of Mohr-Coulomb,Mooney-Rivlin and Rebar were selected to simulate the mechanical behaviors of geomaterials,rubbers and rebars,respectively. From the simulated energy-time variation curves during the cyclic shear,it is found that the inside filling geomaterials mainly play a role of energy dissipation,and scrap tires mainly act for reinforcement.
引文
[1]中华人民共和国商务部.中国再生资源回收行业发展报告2016[EB/OL].(2016-05-25)[2017-02-21]http:∥ltfzs. mofcom. gov. cn/article/ztzzn/an/201605/20160501325666.shtml
[2]江镇海.我国废旧轮胎综合利用的现状与发展[J].橡胶参考资料,2011,41(5):2-5.
[3]李丹.废旧轮胎的资源再生现状及发展对策[EB/OL].(2016-09-20)[2017-02-21]
[4]李丽华,陈辉,肖衡林,等.废旧轮胎颗粒水泥混合土土工特性研究[J].长江科学院院报,2013,30(10):58-61.
[5]辛凌,刘汉龙,沈扬,等.废弃轮胎橡胶颗粒轻质混合土无侧限抗压强度试验[J].解放军理工大学学报(自然科学版),2010,11(1):79-83.
[6] FOOSE G J,BENSON C H,BOSSCHER P. Sand Reinforced with Shredded Waste Tires[J]. Journal of Geotechnical Engineering,1996,122(9):760-767.
[7]鲁洋,刘斯宏,张雨灼,等. STC加筋砂水平循环剪切与竖向激振特性试验研究[J].地震工程学报,2015,37(2):494-499.
[8]李丽华,肖衡林,郑俊杰,等.废旧轮胎加筋路堤边坡模型试验研究[J].工程力学,2015,32(11):79-85.
[9]吴颖,周成,何宁,等.废旧轮胎柔性护岸减缓渠道冻胀数值模拟[J].地下空间与工程学报,2014,10(S2):1777-1781,1793.
[10]薄有为.废轮胎挡土!稳定性与经济性分析[D].中国台湾:国立中央大学,2004.
[11]邢耀文,周成,贾昊青,等.利用废旧轮胎制作立体花柱技术初步研究[J].湖南大学学报(自然科学版),2008,35(11):15-18.
[12] O’SHAUGHNESSY V,GARGA V K. Tire-reinforced Earthfill. Part 2:Pull-out Behaviour and Reinforced Slope Design[J]. Canadian Geotechnical Journal,2000,37(1):97-116.
[13] YOON Y W,HEO S B,KIM K S. Geotechnical Performance of Waste Tires for Soil Reinforcement from Chamber Tests[J]. Geotextiles and Geomembranes,2008,26(1):100-107.
[14]刘斯宏,鲁洋,徐小东,等.废旧轮胎减、隔振建筑基础及其施工方法:中国,CN201410159593. 6[P].2014.
[15]钱家欢,殷宗泽.土工原理与计算[M]. 2版.北京:中国水利水电出版社,1996.
[16]吴世明.土动力学[M].北京:中国建筑工业出版社,2000.
[17] ANSARI Y,MERIFIELD R,YAMAMOTO H,et al. Numerical Analysis of Soilbags under Compression and Cyclic shear[J].Computers and Geotechnics,2011,38(5):659-668.
[18]姚震.基于ABAQUS建模的轮胎接地性态分析[D].宁波:宁波大学,2015.
[19] KENNEDY R H,TERZIYSKI J M. Experiences with Embedded Elements in Tire Modeling[C]//Proceedings of ABAQUS Users’ Conference. Boston, Massachusetts,May 25-27,2004:115-123.
[2]江镇海.我国废旧轮胎综合利用的现状与发展[J].橡胶参考资料,2011,41(5):2-5.
[3]李丹.废旧轮胎的资源再生现状及发展对策[EB/OL].(2016-09-20)[2017-02-21]
[4]李丽华,陈辉,肖衡林,等.废旧轮胎颗粒水泥混合土土工特性研究[J].长江科学院院报,2013,30(10):58-61.
[5]辛凌,刘汉龙,沈扬,等.废弃轮胎橡胶颗粒轻质混合土无侧限抗压强度试验[J].解放军理工大学学报(自然科学版),2010,11(1):79-83.
[6] FOOSE G J,BENSON C H,BOSSCHER P. Sand Reinforced with Shredded Waste Tires[J]. Journal of Geotechnical Engineering,1996,122(9):760-767.
[7]鲁洋,刘斯宏,张雨灼,等. STC加筋砂水平循环剪切与竖向激振特性试验研究[J].地震工程学报,2015,37(2):494-499.
[8]李丽华,肖衡林,郑俊杰,等.废旧轮胎加筋路堤边坡模型试验研究[J].工程力学,2015,32(11):79-85.
[9]吴颖,周成,何宁,等.废旧轮胎柔性护岸减缓渠道冻胀数值模拟[J].地下空间与工程学报,2014,10(S2):1777-1781,1793.
[10]薄有为.废轮胎挡土!稳定性与经济性分析[D].中国台湾:国立中央大学,2004.
[11]邢耀文,周成,贾昊青,等.利用废旧轮胎制作立体花柱技术初步研究[J].湖南大学学报(自然科学版),2008,35(11):15-18.
[12] O’SHAUGHNESSY V,GARGA V K. Tire-reinforced Earthfill. Part 2:Pull-out Behaviour and Reinforced Slope Design[J]. Canadian Geotechnical Journal,2000,37(1):97-116.
[13] YOON Y W,HEO S B,KIM K S. Geotechnical Performance of Waste Tires for Soil Reinforcement from Chamber Tests[J]. Geotextiles and Geomembranes,2008,26(1):100-107.
[14]刘斯宏,鲁洋,徐小东,等.废旧轮胎减、隔振建筑基础及其施工方法:中国,CN201410159593. 6[P].2014.
[15]钱家欢,殷宗泽.土工原理与计算[M]. 2版.北京:中国水利水电出版社,1996.
[16]吴世明.土动力学[M].北京:中国建筑工业出版社,2000.
[17] ANSARI Y,MERIFIELD R,YAMAMOTO H,et al. Numerical Analysis of Soilbags under Compression and Cyclic shear[J].Computers and Geotechnics,2011,38(5):659-668.
[18]姚震.基于ABAQUS建模的轮胎接地性态分析[D].宁波:宁波大学,2015.
[19] KENNEDY R H,TERZIYSKI J M. Experiences with Embedded Elements in Tire Modeling[C]//Proceedings of ABAQUS Users’ Conference. Boston, Massachusetts,May 25-27,2004:115-123.