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首页> 外文期刊>Journal of Earthquake Engineering >COUPLED P-Y T-Z ANALYSIS OF SINGLE PILES IN COHESIONLESS SOIL UNDER VERTICAL AND/OR HORIZONTAL GROUND MOTION
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COUPLED P-Y T-Z ANALYSIS OF SINGLE PILES IN COHESIONLESS SOIL UNDER VERTICAL AND/OR HORIZONTAL GROUND MOTION

机译：竖向和/或水平地面运动下无粘性土中单桩的P-Y T-Z耦合分析

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摘要

Various approaches are currently used for the analysis of piles under vertical and lateral loading. Among these, the beam-on-a-nonlinear Winkler foundation (BNWF) approach using published P-y, T-z and Q-z curves is widely used in practice. In this approach, the P-y and T-z responses are generally uncoupled from each other. The objective of this paper is to investigate the influence that the coupling of the P—y and T—z responses has,on the cyclic and dynamic response of piles in cohesionless soil. A cyclic model is first developed and a parametric study is conducted to investigate the effect the initial confining pressure, angle of wall friction and effective vertical stiffness have on the lateral cyclic hysteretic response. A dynamic model is then developed, and used to study the response of a single pile in cohesionless soil under horizontal and/or vertical ground motion. Results from the parametric study showed that the three parameters did not have a significant influence on the lateral cyclic hysteretic response. Under horizontal and/or vertical ground motion, the horizontal ground motion was observed to dominate the inertial interaction response, and significantly affected both the horizontal and vertical displacement response, mainly due to second-order P-Δ and gapping effects.
机译：当前使用各种方法来分析竖向和横向载荷下的桩。其中，使用已公开的P-y，T-z和Q-z曲线的非线性Winkler地基梁（BNWF）方法在实践中得到了广泛使用。在这种方法中，P-y和T-z响应通常彼此不耦合。本文的目的是研究Py和Tz响应的耦合对无粘性土中桩的循环和动力响应的影响。首先建立一个循环模型并进行参数研究，以研究初始围压，壁摩擦角和有效垂直刚度对横向循环滞后响应的影响。然后建立一个动力学模型，并用于研究水平和/或垂直地面运动下无粘性土中单桩的响应。参数研究的结果表明，这三个参数对横向循环滞后响应没有显着影响。在水平和/或垂直地震动下，观察到水平地震动主导了惯性相互作用响应，并且显着影响水平和垂直位移响应，这主要归因于二阶P-Δ和间隙效应。

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