黄土震陷灾害典型震例的综合研究

Comprehensive Study on Seismic Subsidence of Loess under Earthquake

摘要:

阐述了1995年甘肃永登5.8级地震时造成的黄土震陷灾害形成条件、震害形态特征、黄土的基本性质及湿陷性和静、动土力学参数与震陷灾害的成因关系.并用震陷量预测计算方法和三维有限元数值模拟方法检验了黄土震陷灾害预测的理论、方法并解释了永登5.8级地震黄土震陷现象.

Abstract:

In this paper, the forming conditions of seismic subsidence of loess, the characteristics of seismic disaster, the basic properties of loess including water collapsibility relating to 1995 Yongdeng MsS. 8 earthquake are discussed. The relationship between the static and dynamic parameters of loess and its seismic subsidence is also revealed. Using calculating method of predicting amount of seismic subsidence and 3D finite element method, proposed theory and method of seismic subsidence is validated and the seismic subsidence in 1995 Yonddeng 5.8 earthquake is explained.