Comparative analysis of characters of loess subsidence under different seismic load
WANG Jun 1, 2, 3 , SHI Yu-cheng 1, 2, 3 , WANG Jie-min 4 , WANG Qiang 1, 2, 3 , ZHONG Xiu-mei 1, 2, 3
1. Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China; 2. Open Laboratory of Loess Earthquake Engineering, CEA, Lanzhou 730000, China; 3. Geotechnical Disaster Prevention Engineering Technology Research Center of Gansu Province, Lanzhou 730000, China; 4. College of Resources and Environment, Lanzhou University, Lanzhou 730000, China
Abstract：Different seismic loads have important effect on loess subsidence. By means of the triaxial testing equipment, which is used to load random waves on specimen axially, undisturbed loess subsidence is comparatively studied under different seismic loads, and the effect of different seismic load on characters of loess subsidence is analyzed. The test indicates that the rasidual deformation of loess increases with the increase of dynamic stress under random seismic load or sine wave load, but the increase tendencies of them are different, which show that the characters of loess subsidence vary obviously under different seismic loads, and the effect of different seismic loads on the critical dynamic stress of loess subsidence is different, that is the critical dynamic stress is larger under the random seismic load than under sine wave load, and the effect of the random seismic load with different predominant periods, peaks and durations is also different, that is, the loess subsidence has relation with the predominant period, peak and duration of the random seismic load, and the effect of the predominant period is quite obvious.
王峻, 石玉成, 王杰民, 王强, 钟秀梅, . 不同地震荷载作用下黄土震陷特性的对比分析[J]. 岩土工程学报, 2011, 33(zk1): 102-105.
WANG Jun , , SHI Yu-cheng , , WANG Jie-min , WANG Qiang , , ZHONG Xiu-mei , . Comparative analysis of characters of loess subsidence under different seismic load. Chinese J. Geot. Eng., 2011, 33(zk1): 102-105.