Seismic stability of reinforced soil slopes using the modified pseudo-dynamic method

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-05-01 DOI:10.12989/EAS.2021.20.5.473

Nima Farshidfar, A. Keshavarz, S. M. Mirhosseini

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引用次数: 2

Abstract

The limit equilibrium analysis through the horizontal slice method is used to study the seismic stability of reinforced soil slopes by satisfying the equilibrium of the horizontal and vertical forces as well as moments. Unlike the pseudo-static (PS) method, the pseudo-dynamic method consideres the effects of time and phase difference of the P and S waves propagation inside the soil mass. In this paper, the PS, the conventional pseudo-dynamic (CPD), and the modified pseudo-dynamic (MPD) methods are used to study the seismic stability of reinforced soil slopes. In addition, the equivalent linear method is implemented to analyze the site response for the purpose of calculating the soil dynamics parameters required for the seismic stability analysis of soil slopes via the MPD method. A MATLAB code is developed to calculate via the abovementioned methods. Using the log-spiral slip surface, this code considers the distribution of reinforcements as uniform and variable spacing. In addition, the effect of surcharge pressure on the seismic stability of the slope is included in this study. The obtained results showed that, in general, the MPD method combined with the equivalent linear analysis would produce more critical results than other methods.

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修正拟动力法研究加筋土边坡的地震稳定性

通过水平切片法进行极限平衡分析，通过满足水平力、垂直力和力矩的平衡来研究加筋土边坡的地震稳定性。与拟静力（PS）方法不同，拟动力方法考虑了P波和S波在土体中传播的时间和相位差的影响。此外，为了通过MPD方法计算土质边坡地震稳定性分析所需的土壤动力学参数，采用等效线性方法分析场地反应。开发了一个MATLAB代码来通过上述方法进行计算。本规范采用对数螺旋滑动面，将钢筋的分布视为均匀和可变的间距。此外，本研究还包括了超载压力对边坡地震稳定性的影响。所得结果表明，通常情况下，MPD方法与等效线性分析相结合会产生比其他方法更关键的结果。

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

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response