A Seismic Model for the Periodic Pile‐Plate Road Foundation Based on the P2.5D Finite Element Method

IF 3.4 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-01-11 DOI:10.1002/nag.3945

Jian‐Fei Lu, Qiang‐Jun Fan, Yang Liu

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引用次数: 0

Abstract

Pile‐plate road foundation (PRF) is a new type of road foundation arising in recent years. As the seismic wave is an important kind of dynamic loads, the dynamic analysis of the PRF under seismic wave is thus necessary for its dynamic design. To simplify the analysis of the PRF under seismic waves, the PRF is simplified as the periodic pile‐plate road foundation (PPRF) in this study. To establish the dynamic model for this PPRF, the PPRF is divided into two regions first, namely, the regions I and II. Region I is the region of interest of the PPRF, containing the bedrock, soil layers, embankment, pile rows, and plate, while the region II is the surrounding domain for the region I, including the soil layers and bedrock. In this study, the region I is treated by the periodic 2.5D finite element method (P2.5D FEM) and corresponding P2.5D FEM equations are obtained. For the region II, the periodic thin layer method (PTLM) is established and is used to establish the traction‐displacement relation at the regions I–II interface. With the obtained traction‐displacement relation, the transmitting boundary condition is imposed on the region I, and the incident seismic wave is input to the region I, yielding the P2.5D FE‐TLM model for the PPRF. Based on the established P2.5D FE‐TLM model, some results for the response of the PPRF to the incident surface waves are presented.

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基于P2.5D有限元法的周期桩-板道路基础地震模型

桩板道路基础是近年来兴起的一种新型道路基础。由于地震波是一种重要的动力载荷，因此对其进行地震波作用下的动力分析是其动力设计的必要条件。为了简化地震波作用下的周期桩基的分析，本文将周期桩基简化为周期桩板路基（PPRF）。为了建立该PPRF的动态模型，首先将PPRF划分为两个区域，即区域I和区域II。区域I是PPRF感兴趣的区域，包括基岩、土层、路堤、桩排和板块，而区域II是区域I的周边区域，包括土层和基岩。本研究采用周期2.5D有限元法（P2.5D FEM）对区域I进行处理，得到相应的P2.5D有限元方程。对于II区，建立了周期薄层法（PTLM），并用于建立I-II区界面处的牵引-位移关系。根据得到的牵引力-位移关系，在I区施加传输边界条件，将入射地震波输入到I区，得到PPRF的P2.5D FE - TLM模型。基于所建立的P2.5D FE‐TLM模型，给出了PPRF对入射表面波响应的一些结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal for Numerical and Analytical Methods in Geomechanics 工程技术-材料科学：综合

CiteScore

6.40

自引率

12.50%

发文量

160

审稿时长

9 months

期刊介绍： The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.