摘要
本文利用动三轴试验系统,试验研究了随机地震荷载作用下,非饱和原状黄土的动本构关系。结果表明,其本构关系依然服从双曲线模型,但模型参数随所施加的随机地震荷载时程的不同而不同。在试验中还对不同随机地震荷载和正弦波等效荷载作用下的模型参数、剪切模量和阻尼比进行了对比研究,初步建立了动本构模型参数与所施加的随机地震荷载的卓越周期之间的定量关系。通过试验和计算,证实了曼辛准则对黄土的适用性。
In this paper, it was verified that the dynamic constitutive relationship of unsaturated undisturbed loess under random seismic loading still obeies a hyperbolic model by means of a dynamic triaxial test system. But the parameters of the model are different from different time histories of applied random seismic loading. The contrasting research was made in parameters, shear, modulus and damping ratio under different random seismic loading and equivalent sinusoidal loading. The quantitative relationship between the parameters of the dynamic constitutive model and predominant period of applied random seismic loading was initially established. Through tests and computation, it was confirmed that Mansing Law is suitable for loess.
出处
《西北地震学报》
CSCD
1992年第4期61-68,共8页
Northwestern Seismological Journal
基金
地震联合基金课题(85-10)
