In the traditional stereo-mechanical method based on the collision resilience coefficient, the energy loss caused by pile foundation collision is not considered in the analysis of settlement and displacement of building pile foundation, resulting in low accuracy and reliability of the analysis results. Therefore, this study proposes an improved Kelvin settlement analysis method for building pile foundation collision to solve this existing problem in the stereo-mechanical method. The Kelvin model is established with linear damping to analyze the damping of the pile foundation during the close and rebound stages of collision. The pile foundation collision is then transformed into the vibration of a single degree of freedom system. The vibration model is established to realize the effective calculation of relative settlement velocity and relative settlement displacement of the pile foundation. The maximum settlement displacement of the pile foundation is calculated based on the conservation laws of energy and momentum at the initial and end moments of the pile foundation collision settlement. The results indicate that the proposed method can improve the accuracy and reliability of the settlement analysis of the ground pile foundation.
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李琦,李瑞.近断层脉冲型地震下建筑地桩基础沉降分析[J].地震工程学报,2018,40(2):246-251. LI Qi, LI Rui. Settlement Analysis of Building Pile Foundation UnderNear-fault Pulse-like Ground Motions[J]. China Earthquake Engineering Journal,2018,40(2):246-251.