建筑基桩在振动荷载作用下的响应研究

The study of Building Foundation Pilesesponse with the Effect of Seismic Load

常规地震荷载下对桩基础的研究方法多为拟静力方法,大多没有考虑地震动荷载的影响。与真实情况相差较大,随着建筑抗震设计要求的提高,拟静力已经逐渐不适用当代抗震设计理念。针对地震动荷载对单桩的作用展开研究,采用温克尔(Winkler)弹性地基模型,考虑上部结构与桩基的相互影响,给出单桩在动荷载(主要是水平正弦荷载)作用下的微分方程。在Visual C++6.0软件平台上编制了相应的计算程序,得出了单桩在动荷载下的解析解。通过某框架结构工程实例,说明了提出的方法与理论的可行性与实用性。为分析单桩受动荷载提供了一种应用性较强的解析方法。除此之外也可以为分析距震中较远处的高层建筑的振动检测提供数学力学计算。

The conventional research method Of foundation piles with seismic load always uses quasi static method. However, it fails to take the influence of dynamic load into consideration. And it has a large difierence with the truth. With the improvement of seismic design of building, quasi static method gradually can＇ t adapt to the contemporary seismic design concept. The foundation piles with the effect of dynamic load were researched. By using Winkler elastic foundation model and considering the interaction between topside structure and pile foundation, the differential equations were obtained. Through programming in the Visual C＋ ＋ 6.0 software platform,the analytical solution of vibropile can be obtained. An example of frame structure engineering illustrates the feasibihty and practicability of this theory. In the analysis of foundation piles under dynamic load it provides an applied strong analytical method. In addition, it also can provide mathematical and mechanical calculation in the analysis of the high-rise building vibration detection which is far away from the epicenter.