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假设桩周土符合Novak严格平面应变模型,在波的传播理论的基础上,通过引入势函数的方法,对土层水平振动问题进行了求解,得到了土层波动水平位移的衰减函数以及土层水平动刚度和动阻尼。在此基础上,利用初始参数法研究了桩-土-桩水平动力相互作用和群桩水平振动,并与Gazetas和Dobry近似平面应变模型进行了对比。研究表明:桩距和荷载作用角对两种模型得到的水平动力相互作用因子影响较大,桩间距对水平动力相互作用因子和群桩水平动力阻抗有较大影响。
Assuming that the soil around the pile conforms to the Novak rigorous plane strain model, on the basis of the wave propagation theory, the horizontal vibration problem of the soil layer is solved by introducing the potential function, and the attenuation function of soil horizontal displacement and the soil layer Horizontal dynamic stiffness and dynamic damping. On this basis, the horizontal dynamic interaction of pile-soil-pile and pile group horizontal vibration are studied by using the initial parameter method, and compared with the Gazetas and Dobry approximate plane strain models. The results show that the influence of pile spacing and load acting angle on the horizontal dynamic interaction factor obtained by the two models is significant. The pile spacing has a great influence on the horizontal dynamic interaction factor and pile group horizontal dynamic impedance.