桩土动力相互作用简化方法对比研究

Comparative Study on Simplified Method of Soil-Pile Dynamic Interaction

对于桩土动力相互作用的研究,如果考虑其共同作用会因为边界条件、接触关系等因素确定的不恰当而造成很大误差,因此在实际运用中往往采用简化计算方法.详细介绍了目前工程中常用的简化分析模型.为了对比各种不同的简化方法计算精度,选取三种场地类型和两种地震波,组成6种工况分析比较8种常用的桩土动力相互作用简化分析模型,研究桩的地震响应在相同场地不同地震作用下及相同地震作用下不同场地类型中的变化规律.最后总结了各简化分析模型的合理性和适用工况.

When studying soil- pile dynamic interaction,if considering soil- pile interaction,it will cause error because those factors like boundary conditions and contact relation etc. are not appropriate. As a result,simplified methods are always chosen in practical application. The simplified calculation models commonly used in current engineering were introduced in this paper. In order to compare calculation accuracy of different simplified methods,six analysis cases were comprised of three kinds of site- type and two kinds of seismic wave.And the six analysis cases were used to analyze eight simplified analysis methods commonly used of soil- pile dynamic interaction and study change regulation of seismic response of piles under the two kinds of situation,the same site and different seismic wave,and the same seismic wave and different site. Finally,rationality and applicability of simplified analysis method were summarized.