心墙沥青混凝土动力特性影响因素的试验研究
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摘要
通过沥青混凝土的动三轴试验研究,分析了围压、固结比和油石比等因素对心墙沥青混凝土动力特性的影响规律。试验结果表明:围压或固结比增大有利于沥青混凝土抵抗动荷载能力的提高,但沥青混凝土的阻尼比降低;油石比对沥青混凝土的动力特性有很大的影响,在本次试验研究范围内的沥青混凝土配合比中,油石比的增大对沥青混凝土抵抗动荷载的能力有所提高。
Based on the dynamic triaxial experiment of a core wall asphalt concrete,this paper studies the influences on its dynamic characteristics by factors of confining pressure,consolidation ratio,bitumen aggregate ratio,etc.The results show that an increase in confining pressure or consolidation ratio is conducive to its capabilities of resisting dynamic loads,but such an increase leads to a reduction in its damping ratio.The bitumen aggregate ratio has a great influence on the dynamic properties.In the test range of asphalt concrete mixing proportion in this study,an increase in bitumen aggregate ratio considerably improves the resistance of asphalt concrete against dynamic loads.
Based on the dynamic triaxial experiment of a core wall asphalt concrete,this paper studies the influences on its dynamic characteristics by factors of confining pressure,consolidation ratio,bitumen aggregate ratio,etc.The results show that an increase in confining pressure or consolidation ratio is conducive to its capabilities of resisting dynamic loads,but such an increase leads to a reduction in its damping ratio.The bitumen aggregate ratio has a great influence on the dynamic properties.In the test range of asphalt concrete mixing proportion in this study,an increase in bitumen aggregate ratio considerably improves the resistance of asphalt concrete against dynamic loads.
引文
[1]朱晟.沥青混凝土心墙堆石坝三维地震反应分析[J].岩土力学,2008(11):2933-2938.Zhu Sheng.3-D seismic response analysis of rockfill dam with asphalt concrete core[J].Rock and Soil Mechanics,2008,(11):2933-2938.(in Chinese)
[2]Hardin B O,Drnevich V P.Shear Modulus and Damping in Soils[J].Geotechnical Division of ASCE,1972,98(6):603-624,98(7):667-692.
[3]吴世明,周景星.土的动力特性及测试和应用[C]∥第三届全国土动力学学术会议论文集.上海,同济大学出版社,1990:1-7.Wu Shiming,Zhou Jingxing.The test and application of the soil dynamic characteristics[C]∥Proceedings of the third national conference on soil dynamics.Shanghai,Tongji University Press,1990:1-7.(in Chinese)
[4]南京水利科学研究院土工研究所.土工试验技术手册[M].北京:人民交通出版社,2003.Geotechnical institute of water conservancy scientific research institute in Nanjing.The soil test technical manual[M].Beijing:China Communication Press,2003.(in Chinese)
[5]中华人民共和国电力行业标准DL/T5362-2006.水工沥青混凝土试验规程[S].北京:中国电力出版社,2007.Standard of Electric Power Industry of the People’s Republic of China.DL/T5362-2006.Test code of hydraulic bitumen concrete[S].Beijing:China Electric Power Press,2007.(in Chinese)
[2]Hardin B O,Drnevich V P.Shear Modulus and Damping in Soils[J].Geotechnical Division of ASCE,1972,98(6):603-624,98(7):667-692.
[3]吴世明,周景星.土的动力特性及测试和应用[C]∥第三届全国土动力学学术会议论文集.上海,同济大学出版社,1990:1-7.Wu Shiming,Zhou Jingxing.The test and application of the soil dynamic characteristics[C]∥Proceedings of the third national conference on soil dynamics.Shanghai,Tongji University Press,1990:1-7.(in Chinese)
[4]南京水利科学研究院土工研究所.土工试验技术手册[M].北京:人民交通出版社,2003.Geotechnical institute of water conservancy scientific research institute in Nanjing.The soil test technical manual[M].Beijing:China Communication Press,2003.(in Chinese)
[5]中华人民共和国电力行业标准DL/T5362-2006.水工沥青混凝土试验规程[S].北京:中国电力出版社,2007.Standard of Electric Power Industry of the People’s Republic of China.DL/T5362-2006.Test code of hydraulic bitumen concrete[S].Beijing:China Electric Power Press,2007.(in Chinese)
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