桥梁桩基础地震作用下不同桩土模型比较研究

摘要

Two finite element models were created considering the soil-pile interaction in different ways. One of them considered the interaction to be elastic during the whole process while the other regarded it nonlinear. Pushover analysis and nonlinear time history analysis were both conducted to compare the difference between the two models. The results showed that it is conservative to simulate the real soil-pile interaction by using simplified elastic model when the pile foundation is in minor damage.%对实际工程中某一单墩结构分别建立考虑弹性桩土相互作用和考虑非线性桩土相互作用的模型,对这两种模型分别进行pushover分析以及非线性时程分析,探讨了两种模型的差异.分析结果表明:当桩基础在地震作用下发生轻微损伤时,采用简化弹性模型模拟地震作用下桩土相互作用要过于保守.