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发表时间：2009-01-01

发表刊物：土木工程学报

所属单位：建设工程学部

卷号：42

期号：5

页面范围：117-124

ISSN号：1000-131X

摘要：Using a intermediate-scale dynamic triaxial apparatus( specimen size
   phi200 * 510) , laboratory tests on the post-liquefaction sand-gravel
   composites were performed to investigate the effects of the relative
   density, initial consolidation pressure, liquefaction safety and cyclic
   stress ratio. The results show that the reloading behavior of the
   liquefied sand-gravel specimens is distinctly different from those
   without dynamic loading. The reloading stress-strain curve is
   approximately composed of three parts, the stiffness-recovering part,
   the stiffness-stabilizing part and the plastic flow part. A method is
   given to determine the characteristic parameter values, which avoids the
   uncertainty of the method by Yasuda and assures the accuracy of the
   parameter analysis. A tri-linear static stress-strain model of liquefied
   sandgravel composites is established, in which the initial consolidation
   pressure, liquefaction safety and cyclic stress ratio can be considered
   synthetically.

备注：新增回溯数据