地震作用下自由场中饱和砂土的应力-应变推导
|
摘要
水平自由场地震响应分析是岩土地震工程实践的重要内容之一。利用香港科技大学土工离心机上的双向振动台,进行了饱和砂土自由场在水平双向地震作用下的动力模型试验。根据应力和应变的定义以及达朗贝尔原理,由试验观测的土体加速度、位移和孔隙水压力数据直接推导得到不同深度处砂土的应力和应变,揭示了振动过程中饱和砂土的应力路径和应力-应变关系演化过程,以及与超静孔隙水压力发展的联系。
Analysis of response of level ground subjected to earthquake is one of the most important problems in geotechnical engineering practice.By use of the bi-axial shaker installed on the geotechnical centrifuge at the Hong Kong University of Science and Technology,a centrifuge dynamic test was performed on a saturated sand ground model under a bi-axial earthquake loading.Based on definitions of stress and strain,and the D'Alembert's principle,stress and strain of soils at various depths were derived from the data of acceleration,displacement,as well as excess pore pressure measured in the test.The stress paths and stress-strain relationships of saturated sand during the shaking event,and their connection with development of excess pore pressure were revealed.
Analysis of response of level ground subjected to earthquake is one of the most important problems in geotechnical engineering practice.By use of the bi-axial shaker installed on the geotechnical centrifuge at the Hong Kong University of Science and Technology,a centrifuge dynamic test was performed on a saturated sand ground model under a bi-axial earthquake loading.Based on definitions of stress and strain,and the D'Alembert's principle,stress and strain of soils at various depths were derived from the data of acceleration,displacement,as well as excess pore pressure measured in the test.The stress paths and stress-strain relationships of saturated sand during the shaking event,and their connection with development of excess pore pressure were revealed.
引文
[1]KOGA Y,MATSUO O.Shaking table tests of embankments resting on liquefiable sandy ground[J].Soils and Foundations,1990,30(4):162-174.
[2]KAZAMA M,SENTO N,OMURA H,et al.Liquefaction and settlement of reclaimed ground with gravelly decamped granite soil[J].Soils and Foundations,2003,43(3):57-72.
[3]DOBRY R,TABOADA V,LIU L.Centrifuge modeling of liquefaction effects during earthquake[C]//Proc.1st.Intern.Conf.on Earthquake Geotech.Engrg.,Rotterdam:A.A.Balkema,1995.
[4]ARULANANDAN K,ANANDARAJAH A,ABGHARI A.Centrifuge modeling of soil liquefaction susceptibility[J].Journal of Geotechnical Engineering,1983,109(3):281-300.
[5]HUSHMAND B,SCOTT R F,CROUSE C B.Centrifuge liquefaction tests in a laminar box[J].Geotechnique,1988,38(2):253-262.
[6]张霆,刘汉龙,胡玉霞,等.鼓式土工离心机技术及其工程应用研究[J].岩土力学,2009,30(4):1191-1196.ZHANG Ting,LIU Han-long,HU Yu-xia,et al.Geotechnical drum centrifuge technique and its engineering application[J].Rock and Soil Mechanics,2009,30(4):1191-1196.
[7]侯瑜京.土工离心机振动台及其试验技术[J].中国水利水电科学研究院学报,2006,4(1):15-22.HOU Yu-jing.Centrifuge shakers and testing technique[J].Journal of China Institute of Water Resources and Hydropower Research,2006,4(1):15-22.
[8]张丙印,张美聪,孙逊.土石坝横向裂缝的土工离心机模型试验研究[J].岩土力学,2008,29(5):1254-1258.ZHANG Bing-yin,ZHANG Mei-cong,SUN Xun.Centrifugal modeling of transverse cracking in earth core dams[J].Rock and Soil Mechanics,2008,29(5):1254-1258.
[9]SU D.Centrifuge investigation on responses of sand deposit and sand-pile system under multi-directional earthquake loading[D].Hong Kong:The Hong Kong University of Science and Technology,2005.
[10]苏栋,李相崧.科氏力和风阻力对离心机双向振动的影响[C]//土工测试技术实践与发展.北京:黄河水利出版社,2005.
[11]KAZAMA M,YANAGISAWA E,TOYOTA H.et al.Stress strain relationship of sandy soils directly obtained from1-D centrifuge shaking table tests[C]//Proc.1st.Intern.Conf.on Earthquake Geotech.Engrg.,Rotterdam:A.A.Balkema,1995.
[12]ZEGHAL M,ELGAMAL A W.Analysis of site liquefaction using earthquake records[J].J.of Geotech.Engrg.,ASCE,1994,120(6):996-1017.
[13]WILSON D W.Soil-pile-superstructure interaction in liquefying sand and soft clay[Ph.D].Californiai University of California,1998.
[2]KAZAMA M,SENTO N,OMURA H,et al.Liquefaction and settlement of reclaimed ground with gravelly decamped granite soil[J].Soils and Foundations,2003,43(3):57-72.
[3]DOBRY R,TABOADA V,LIU L.Centrifuge modeling of liquefaction effects during earthquake[C]//Proc.1st.Intern.Conf.on Earthquake Geotech.Engrg.,Rotterdam:A.A.Balkema,1995.
[4]ARULANANDAN K,ANANDARAJAH A,ABGHARI A.Centrifuge modeling of soil liquefaction susceptibility[J].Journal of Geotechnical Engineering,1983,109(3):281-300.
[5]HUSHMAND B,SCOTT R F,CROUSE C B.Centrifuge liquefaction tests in a laminar box[J].Geotechnique,1988,38(2):253-262.
[6]张霆,刘汉龙,胡玉霞,等.鼓式土工离心机技术及其工程应用研究[J].岩土力学,2009,30(4):1191-1196.ZHANG Ting,LIU Han-long,HU Yu-xia,et al.Geotechnical drum centrifuge technique and its engineering application[J].Rock and Soil Mechanics,2009,30(4):1191-1196.
[7]侯瑜京.土工离心机振动台及其试验技术[J].中国水利水电科学研究院学报,2006,4(1):15-22.HOU Yu-jing.Centrifuge shakers and testing technique[J].Journal of China Institute of Water Resources and Hydropower Research,2006,4(1):15-22.
[8]张丙印,张美聪,孙逊.土石坝横向裂缝的土工离心机模型试验研究[J].岩土力学,2008,29(5):1254-1258.ZHANG Bing-yin,ZHANG Mei-cong,SUN Xun.Centrifugal modeling of transverse cracking in earth core dams[J].Rock and Soil Mechanics,2008,29(5):1254-1258.
[9]SU D.Centrifuge investigation on responses of sand deposit and sand-pile system under multi-directional earthquake loading[D].Hong Kong:The Hong Kong University of Science and Technology,2005.
[10]苏栋,李相崧.科氏力和风阻力对离心机双向振动的影响[C]//土工测试技术实践与发展.北京:黄河水利出版社,2005.
[11]KAZAMA M,YANAGISAWA E,TOYOTA H.et al.Stress strain relationship of sandy soils directly obtained from1-D centrifuge shaking table tests[C]//Proc.1st.Intern.Conf.on Earthquake Geotech.Engrg.,Rotterdam:A.A.Balkema,1995.
[12]ZEGHAL M,ELGAMAL A W.Analysis of site liquefaction using earthquake records[J].J.of Geotech.Engrg.,ASCE,1994,120(6):996-1017.
[13]WILSON D W.Soil-pile-superstructure interaction in liquefying sand and soft clay[Ph.D].Californiai University of California,1998.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心