摘要
基于地基土线性假定的单桩P—Δ效应分析研究较多,但基于地基土非线性假定的单桩P-Δ效应分析研究极少。为此,提出等效多段折线弹簧模拟非线性地基土的p—y曲线,应用有限元法进行非线性地基土中单桩P—Δ效应分析。同时对等效多段折线弹簧模拟非线性地基土p—y曲线的具体细节进行了总结,以确保计算精度。最后,应用Midas Civil程序建立了有限元模型进行了算例分析。结果表明,等效多段折线弹簧模拟p—y曲线后应用商业程序计算基桩P—Δ效应是非常便捷的方法,具有工程实际意义。
Many methods have been developed and applied to analysis of P-Δ effect of piles in soils with linear property, while few have been developed and applied to analysis of P-Δ effect of piles in soils with nonlinear property. Therefore equivalent springs are applied to simulate p-y figure of nonlinear clay, and then the P-Δ effect of pile is analyzed by finite element method. The steps of how to simulate p-y figure of nonlinear clay is presented in the paper. Case analysis is done for displacement and stress calculation of pile in nonlinear clay with P-Δ effect well considered by finite element method. Fi- nally conclusions are drawn as follows： （i） finite element method can well done in software, and is proved to be a effective method for P-Δ effect analysis of pile foundation in nonlinear clay; （ii） finite el- ement method will be popularized in engineering for analysis of P-Δ effect analysis of pile foundation in nonlinear clay.
出处
《公路工程》
北大核心
2012年第5期73-76,共4页
Highway Engineering
关键词
单桩
P-Δ效应
等效弹簧
有限元法
P-Y曲线
single pile
P-A effect
equivalent spring
finite element method
p-y figure
