【摘要】 通过砂土的一系列动三轴实验,研究不规则地震荷载作用下与定次数等幅荷载作用下土体变形间的关系,给出了地震荷载的大小对二者间关系的影响规律。结果表明:真实地震荷载下土的变形发展与等幅正弦荷载明显不同,应变发展时程的形态主要受地震动的形态控制;若采用以20周作为标准作用次数的等幅荷载代替不规则的地震荷载,修正真实地震应力下的残余变形,荷载大小对随机波与定次数波作用下土体变形间关系没有影响。更多还原

【Abstract】 Through series of dynamic triaxial tests,the relationships of soil deformation under irregular seismic wave loading and fixed-number wave loading respectively are analyzed.The effect of loading amplitudes on the relationships is presented.The results show that:soil deformation development under irregular seismic loading obviously differs from that under uniform sinusoidal loading,and the strain time history is mainly controlled by the performance of ground motion;20 cycles of uniform sinusoidal loading is employed instead of irregular seismic loading to correct residual deformation of soils under real seismic loading,the values of corrected coefficient are independent of loading amplitudes.更多还原