复合地基不同参数对地面动力特性的影响分析

Effect Analysis of Composite Foundation Parameters on Ground Dynamic Characteristics

复合地基在我国的应用极为广泛,但应用水平参差不齐,工程质量需要提高,更需要理论指导。由于复合地基的复杂性,复合地基参数对地震作用下地面运动特性的影响,学者研究的结论和意见也不一致。因此,进一步研究其理论及工程应用问题既是客观要求又是现实需要。为了更深入地探讨有关问题,笔者采用有限元法,引入粘弹性人工边界,同时把地震波转化为等效荷载输入到模型中,认为比较符合实际。最后,通过系统分析,得出了一些有益的结论,有一定的工程价值,同时也为进一步研究提供了科学依据。

Nowadays, the composite foundation is widely applied in China with uneven quality, which needs to be raised and moreover needs theoretical guide. Due to its complexity, controversy exists among researchers about the effect of composite foundation parameters on the characteristics of the ground rnovement when earthquake occurs. Hence, to study the above problem has objective requirement and practical demand. To make a better investigation of the problem, FEM is adopted and viscous-elastic artificial boundary is introduced. Besides, the equivalent load of earthquake wave is put into the model which can well simulate the real situation. Finally, some useful conclusions with certain engineering value have been drawn through systematic analysis, which will contribute to engineering design and further research.