【作者】 马建军； 高笑娟； 刘丰军； 贾振华；

【Author】 MA Jian-jun;GAO Xiao-juan;LIU Feng-jun;JIA Zhen-hua;College of Civil Engineering, Henan University of Science and Technology;

【机构】 河南科技大学土木工程学院；

【摘要】 基于已建立的横向激励下单桩的非线性动力学模型,利用单桩的无量纲运动方程和多尺度方法,求得单桩的主共振幅频响应方程。进而基于Vlasov地基模型及确定群桩相互作用系数的经验方法,求得修正的弹性地基参数。最后,运用两桩基础的幅频响应曲线、桩端横向位移演变值和桩身剪力变化情况研究了群桩效应对桩基动力响应的影响,同时分析了边界条件对群桩效应作用的影响。更多还原

【Abstract】 Based on the nonlienar dynamics model of a single pile subjected to transverse excitation, the frequency-response equation of the primary resonance of the pile foundation is obtained employed the nondimensonal motion equation of the pile and the method of multiple scales. Then, using the Vlasov foundation model and the empirical method to determine the pile group interaction coefficients, the modified elastic foundation parameters can be obtained. Finally, the influence of pile group effect on the nonlinear response of pile groups is examined by means of the frequency-response curves, the evolution of transverse displacement and the change of shear force of piles. Meanwhile, the effect of the boundary conditions on the pile group effect also is investigated.更多还原