【作者】 沈明荣； 孙建生； 永井哲夫；

【Author】 Shen Mingrong (TongJi University Shanghai 200092) Sun Jiansheng Nakayi Tetuoku (Aoki Corporation,Tsukuba,300-26,Japan)

【机构】 同济大学地下工程系； (株)青木建设技术本部研究所；

【摘要】 作为描述地震机理的粘滑特性一直倍受重视。本文作者在进行直接剪切试验的过程中所获得的粘滑曲线的基础上,分析了由直剪试验所得的两种曲线的形态特征。指出了出现两种曲线形态的原因是由于不连续面存在着起伏角使试件的受力状态不同,进而出现了粘滑特性的差异。此外,通过大小不同的剪切面积的试验,确认粘滑刚度与剪切面积无关。最后作者根据试验的结果对Hoskins、Jaeger等人提出的本构模型加以改进。更多还原

【Abstract】 The Property of Stick-Slip has been considered seriously important as describing the earthquake mechanism. The auther analysed the characteristics of two shapes of curves on the basis of the Stick-Slip curve obtained from the direct shear tests.It is pointed out that the appearance of these curves is owing to the existence of the undulating angle in the discontinuons surface,strengthening the samples inhomogeneously and further causing the different characteristics of Stick-Slip.Besides,it is concluded by the shear tests with different sizes that the stiffness of Stick-Slip is not related to the rigidity and the shearing area.Finally,the author improved the constitutive model referred to by Hoskins and Jaeger according to the test results.更多还原