不同形式振动荷载下土中孔隙水压力的发展

Development of Pore Water Pressure in Sands under Different Types of Cyclic Loadings

为了考虑实际工程问题中不同振动荷载的形式对土中振动孔隙水压力的影响．从能鼠分析的原理出发并结合大量试验成果分析，研究和探讨了任意不同形式荷载下土中振动孔压的发展形式．由此所提出的土的振动孔压耦合模型．更为合理地阐明不同形式荷载下土中振动孔压增长的原因，而且也比较方使于实际应用．

Based on the concept of the energy method and a series of laboratory testing res 1ts, the effects of different types of the exerted cyclic loading on the development of pore water pressure in sands are studied in this paper. Study results show that the relationship is unified between the average values of the cyclic pore pressure development and the accumulated energy dissipated in the soil, but the instantaneous values of pore pressure development will also be related to the intensities of both the exerted shearing and spherical stresses in the unique period of vibration. Therefore, an expression for cyclic pore pressure development under different types of loadings may be finally obtained, in which the development of pore pressure will be predicted by two factors of the accumulated energy and the energy dissipated in the unique vibrating time.