液化场地桩基侧向响应分析中p-y曲线模型研究进展

采用非线性Winkler地基梁模型分析侧向液化土-桩相互作用所面临的首要难题是液化土p-y曲线的确定.因此较全面地阐述了液化土p-y曲线模型的国内外研究历史、现状与重要成果,对获得液化土p-y曲线不同试验手段的典型试验作一简明分析,并概括了桩基侧向响应分析中常用的液化土p-y曲线.液化土p-y曲线的模型研究国外已取得不少很有价值的科研成果并开始用于桩基设计中,而国内才刚刚起步且以试验研究为主,基于这个事实,提出了对曲线模型研究的若干建议与认识,为曲线模型研究提供一些技术思路.液化土p-y曲线模型研究水平的提升将推动我国发展基于变形的液化场地桩基桥梁抗震设计方法. 

RECENT ADVANCE OF p-y CURVE TO MODEL LATERAL RESPONSE OF PILE FOUNDATION ON LIQUEFIED GROUND

The most difficultstep in analyzing soil-pile interaction in liquefied ground byusing the Beam on Nonlinear Winkler Foundation (BNWF) method ishow to determine p-y curves for liquefied soil, andconsequently many attempts have been made for investigatingp-y curves of the liquefying soil. The history, currentsituation and valuable achievements of the p-y curve model forliquefying soil are comprehensively expounded, some typical testsfor studying $p$-$y$ curves are reviewed and those p-y curvesare briefly summarized that were often used to analyze the lateralresponse of pile foundations on liquefied grounds. Finally, sincea lot of valuable achievements in p-y curve model have beenmade and put into practice in the overseas design of pilefoundations on liquefiable grounds whereas the domestic researchis still at the start with focuses laid on experiments, somethoughts and understandings on the p-y curves are put forwardin this review to elucidate effective technical approaches. Thepromotion of researches on the p-y curve model has theoreticaland practical significance for developing displacement-basedmethods of seismic design for pile-supported bridges in China.