Seismic performance assessment for high CFRD on thick layered deposit considering various reinforcement measures

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2025-05-29 DOI:10.1016/j.soildyn.2025.109550

Zhao Wang , Wenming Peng , Jian-Min Zhang , Rui Wang

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引用次数: 0

Abstract

Seismic safety of high concrete face rockfill dams (CFRD) on thick layered deposit is crucial. This study develops a seismic performance assessment procedure for high CFRD on thick layered deposit considering multiple engineering demand parameters (EDPs), and evaluates the effectiveness of gravel column and berm reinforcement for a typical CFRD. Solid-fluid coupled seismic response analysis of high CFRD on thick layered deposit is conducted using an advanced elasto-plastic constitutive model for soil, revealing the unique seismic response of the system, including the buildup of excess pore pressure within the thick deposit. Based on the high-fidelity simulations, appropriate intensity measure (IM) and EDPs are identified, and corresponding damage states (DS) are determined. Fragility curves are then developed using multiple stripe analysis, so that the probability of damage under different input motion intensities can be quantified for different DS. Using the proposed procedure, the reinforcement effects of berms and gravel columns are evaluated. Results show that berms can contribute significantly to reducing the probability of damage for the system, while the effect of gravel columns is unsatisfactory due to the limited achievable installation depth compared to the thickness of the deposit and low replacement ratio.

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考虑多种加固措施的厚层状堆积层高CFRD抗震性能评价

厚层堆积层上高面板堆石坝的抗震安全性至关重要。本文建立了考虑多种工程需求参数（EDPs）的厚层堆积层上高堆积层抗震性能评价方法，并对典型堆积层的碎石柱和护堤加固效果进行了评价。采用先进的土弹塑性本构模型，对厚层状沉积物上的高CFRD进行了固流耦合地震响应分析，揭示了该体系独特的地震响应，包括厚层状沉积物内部超孔隙压力的积累。在高保真仿真的基础上，确定了合适的强度测度和edp，并确定了相应的损伤状态。然后利用多条纹分析绘制脆性曲线，从而量化不同输入运动强度下不同DS的损伤概率。应用该方法对护堤和砾石柱的加固效果进行了评价。结果表明，护堤能够显著降低系统的破坏概率，而砾石柱由于可实现的安装深度与沉积物厚度相比有限，且替换率较低，效果不理想。

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

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.