文章摘要
应用于水平受荷桩特性分析的一种修正P-y曲线模型
A modified P-y curve model for the analysis of horizontal loaded piles in Marine Engineering
投稿时间:2017-12-19  修订日期:2018-01-08
DOI:
中文关键词: P-y模型  水平受荷桩  静力荷载  循环荷载  折减系数
英文关键词: P-y model  laterally loaded pile  static load  cyclic loading  reduction fact
基金项目:国家自然科学基金(41772303); 上海市自然科学基金(17ZR1410100)
作者单位E-mail
武亚军 上海大学 土木工程系 wyjdldz@163.com 
卢晨阳 上海大学 土木工程系 lcy2ytt@outlook.com 
李卫超 同济大学 地下建筑与工程系  
杨敏 同济大学 地下建筑与工程系  
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中文摘要:
      水平受荷桩特性常采用API规范中的P-y曲线法进行分析,但是对于长期受循环荷载的海洋工程中的水平受荷桩来说静力计算结果往往偏小。为此,本文首先在API规范的基础上对其中的静止土压力系数K0、α和初始地基刚度K三个关键参数进行了重新定义和取值,并采用修正后的P-y曲线模型对两个案例中水平荷载作用下单桩的受荷特性进行了验证,结果证明修正后的P-y曲线模型相对API规范模型和双曲线模型能更有效的预测单桩位移反应性状。同时,在静力分析基础上,针对Rosquo?t折减方法的不足,对其中影响系数a的取值进行了改进,将改进后的折减方法与修正后的P-y曲线模型相结合仍然对前述两个案例进行了循环荷载作用下桩的水平受荷特性进行了分析,结果表明修正方法得到的计算结果和实测值吻合得很好。
英文摘要:
      Horizontal response of pile foundation is widely analyzed with P-y curve method recommended by API standard, but the static response is generally underestimated with this method for the laterally loaded piles under long term cyclic loading in offshore engineering. Therefore based on the API standard, three key parameters, lateral earth pressure coefficients at rest K0, project angle α and initial stiffness K, are redefined in this paper, which is verfied against the measured response of two test piles. This verification proves the ability of amended P-y curve model to produce a better prediction of the pile lateral response than that given by the API recommended model and another hyperbolic model. Furthermore, based on the static P-y model, the Rosquo?t reduction method are modified by changing the influencing coefficient, a. This paper reommended reduction coefficients are incorporated in this study proposed static P-y model, which is employed to predict another two test piles subject to lateral cyclic loading. The calculated response are in good agreement with the measured values.
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