三桩厚承台承载力的研究

Study on the Bearing Capacity of Thick Pile Cap with Three Piles

本文采用三维有限元法对三桩厚承台作了弹性应力分析,结合对16个比例为1:5的等边三桩承台的试验研究,揭示了三桩厚承台的破坏模式和传力机理,并提出了其设计计算方法,按本文方法设计的承台厚度比目前工程界常用的约少30％～40％。

In this paper, three dimensional structural analysis of thick pile cap with three piles has been performed by Finite Element Method. Based on the test result of sixteen 1/5-scale models, the failure mode and the load transfer mechanism of pile cap with three equilateral piles are presented, and the design method of such thick cap is proposed. In comparison with that obtained by current design procedure,the thickness of pile cap calculated by the suggested method can be reduced by about 30-40 percent.