循环荷载水平与加载频率耦合作用下的软粘土特性研究

倪静, Buddhima Indraratna, 耿雪玉, 陈有亮, 朱颖

倪静, Buddhima Indraratna, 耿雪玉, 陈有亮, 朱颖. 循环荷载水平与加载频率耦合作用下的软粘土特性研究[J]. 工程力学, 2014, 31(10): 167-173. DOI: 10.6052/j.issn.1000-4750.2013.05.0387
引用本文: 倪静, Buddhima Indraratna, 耿雪玉, 陈有亮, 朱颖. 循环荷载水平与加载频率耦合作用下的软粘土特性研究[J]. 工程力学, 2014, 31(10): 167-173. DOI: 10.6052/j.issn.1000-4750.2013.05.0387
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NI Jing, INDRARATNA Buddhima, GENG Xue-yu, CHEN You-liang, ZHU Ying. EXPERIMENTAL STUDY OF THE COMBINED EFFECT OF CYCLIC STRESS LEVEL AND LOADING FREQUENCY ON THE PERFORMANCE OF SOFT CLAYS[J]. Engineering Mechanics, 2014, 31(10): 167-173. DOI: 10.6052/j.issn.1000-4750.2013.05.0387
Citation: NI Jing, INDRARATNA Buddhima, GENG Xue-yu, CHEN You-liang, ZHU Ying. EXPERIMENTAL STUDY OF THE COMBINED EFFECT OF CYCLIC STRESS LEVEL AND LOADING FREQUENCY ON THE PERFORMANCE OF SOFT CLAYS[J]. Engineering Mechanics, 2014, 31(10): 167-173. DOI: 10.6052/j.issn.1000-4750.2013.05.0387
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循环荷载水平与加载频率耦合作用下的软粘土特性研究

  • 上海理工大学土木工程系,上海 200093; #br#2. 澳大利亚卧龙岗大学土木工程系,新南威尔士州 2522

基金项目: 上海市教育委员会科研创新项目(14YZ081); 上海高校青年教师培养资助计划项目(slg13027)
详细信息
    作者简介:

    BuddhimaIndraratna(1960-),男,澳大利亚人,教授,博士,博导,从事岩土动力特性研究(E-mail:indra@uow.edu.au); 耿雪玉(1981-),女,山东人,讲师,博士,博导,从事软土地基加固研究(E-mail:xygen@gmail.com); 陈有亮(1966-),男,河北人,教授,博士,硕导,从事岩土工程方面的研究(E-mail:chenyouliang2011@163.com); 朱颖(1990-),女,山西人,硕士生,从事软粘土动力特性研究(E-mail:35zhuying@sina.com).

    通讯作者:

    倪静(1983-),女,上海人,讲师,博士,从事软粘土动力特性研究(E-mail:wendy_1943@163.com).

  • 中图分类号: TU411

EXPERIMENTAL STUDY OF THE COMBINED EFFECT OF CYCLIC STRESS LEVEL AND LOADING FREQUENCY ON THE PERFORMANCE OF SOFT CLAYS

  • School of Civil Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; #br#2. School of Civil Engineering, University of Wollongong, NSW 2522, Australia

摘要

    摘要
  • 摘要: 通过不排水循环三轴试验,并考虑不同循环应力水平及加载频率的影响,研究了软粘土在循环荷载作用下的孔隙水压力及变形特性,分别探讨了这些特性随循环加载时间和加载次数的不同变化规律。研究结果表明,对于相同循环应力水平,相同加载次数下不同加载频率的软粘土特性有所不同,而相同加载时间下不同加载频率的软粘土特性基本相同。此外,无论加载频率为何数值,一旦循环应力水平超过临界值,软粘土破坏必将发生。为了深入研究应力水平和加载频率的耦合作用,该文从应力控制循环加载试验中的应变速率着手,对软粘土的特性进行了分析。结果表明,在应力水平相同的情况下,软粘土在不同加载频率下的应变速率是基本相同的,由此可得对于软粘土在循环荷载作用下特性的影响,应力水平比加载频率更为重要。
    Abstract: Undrained cyclic triaxial tests were conducted on soft clay to investigate the combined effect of cyclic stress level and loading frequency on the generation of excess pore water pressures and axial strains with the number of loading cycles or time. The results indicate that for a given cyclic stress level, the soil properties under various loading frequencies are slightly different if an identical number of loading cycles is considered, whereas they do not deviate from each other if an identical time is considered. In addition, failure occurs when the cyclic stress level exceeds a critical value irrespective of the loading frequency. The combined effect of a cyclic stress level and a loading frequency was studied by analyzing the strain rate in this stress-controlled cyclic loading test. It is shown that for a given cyclic stress level, the strain rate at various loading frequencies are almost same, implying that the influence of a cyclic stress level on the soft clay behavior is stronger compared to a loading frequency.
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    • 参考文献(23)
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出版历程
  • 收稿日期:  2013-05-03
  • 刊出日期:  2014-10-24

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