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Open Access 2025 | Open Access | Book

Stochastic Dynamic Response Analysis and Performance-Based Seismic Safety Evaluation for High Concrete Faced Rockfill Dams

Authors: Bin Xu, Rui Pang

Publisher: Springer Nature Singapore

Book Series : Hydroscience and Engineering

Part of: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

Table of Contents

About this book

This open access book provides a complete probabilistic analysis method and a performance-based seismic safety evaluation for high concrete faced rockfill dam (CFRD). Combined with random sample generation and reliability analysis methods, the dynamic response characteristics and reliability level of CFRD under various random factors are comprehensively described. In Chapter 2, a random ground motion model based on spectral representation-random function and a high-dimensional random variable generation method based on GF- discrepancy are established. Combined with probability density evolution method (PDEM) and the random sample generation methods to verify its effectiveness and reliability for nonlinear complex geotechnical engineering. In Chapter 3, the dynamic response and probabilistic characteristics of high CFRD under random ground motion are revealed based on the elastoplastic analysis. A performance-based seismic safety evaluation method is established. In Chapter 4, the influence of material parameter randomness on dynamic response and seismic safety of high CFRD is studied from the perspective of stochastic dynamics and probability. In Chapter 5, the stochastic dynamic response and probability distribution of high CFRD under the coupled random action of ground motion and material parameters are systematically studied, and the performance-based seismic safety evaluation framework is improved. In Chapter 6, The stochastic dynamic response of 3D high CFRD is studied, and the failure performance index and performance level based on overstress volume ratio combined with overstress accumulation time are discussed. The performance-based seismic safety evaluation framework is further improved. In Chapter 7, combined with the finite element dynamic time-history analysis method considering the softening effect of rockfill, a performance-based seismic safety evaluation framework for dam slope stability of high CFRD under multiple random factors is systematically explored from the perspective of stochastic dynamics and probability. In Chapter 8, The performance indexes of seismic safety evaluation for high CFRDs are suggested and the corresponding performance level with probability assurance is put forward. The multi-seismic intensity - multi-performance target - failure probability performance relationship is established, and a performance-based seismic safety evaluation framework is initially formed. This book can be used as a reference for scholars studying random vibration and reliability analysis, as well as for scholars studying dam safety evaluation.

Frontmatter

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Chapter 1. Introduction

Abstract

This paper provides a complete probabilistic analysis method and a performance-based seismic safety evaluation for high concrete faced rockfill dam (CFRD). Combined with random sample generation and reliability analysis methods, the dynamic response characteristics and reliability level of CFRD under various random factors are comprehensively described. In Chapter 2, a random ground motion model based on spectral representation-random function and a high-dimensional random variable generation method based on GF-discrepancy are established. Combined with probability density evolution method (PDEM) and the random sample generation methods to verify its effectiveness and reliability for nonlinear complex geotechnical engineering. In Chapter 3, the dynamic response and probabilistic characteristics of high CFRD under random ground motion are revealed based on the elastoplastic analysis. A performance-based seismic safety evaluation method is established. In Chapter 4, the influence of material parameter randomness on dynamic response and seismic safety of high CFRD is studied from the perspective of stochastic dynamics and probability. In Chapter 5, the stochastic dynamic response and probability distribution of high CFRD under the coupled random action of ground motion and material parameters are systematically studied, and the performance-based seismic safety evaluation framework is improved. In Chapter 6, The stochastic dynamic response of 3D high CFRD is studied, and the failure performance index and performance level based on overstress volume ratio combined with overstress accumulation time are discussed. The performance-based seismic safety evaluation framework is further improved. In Chapter 7, combined with the finite element dynamic time-history analysis method considering the softening effect of rockfill, a performance-based seismic safety evaluation framework for dam slope stability of high CFRD under multiple random factors is systematically explored from the perspective of stochastic dynamics and probability. In Chapter 8, The performance indexes of seismic safety evaluation for high CFRDs are suggested and the corresponding performance level with probability assurance is put forward. The multi-seismic intensity—multi-performance target—failure probability performance relationship is established, and a performance-based seismic safety evaluation framework is initially formed. This book can be used as a reference for scholars studying random vibration and reliability analysis, as well as for scholars studying dam safety evaluation.

Bin Xu, Rui Pang

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Chapter 2. Probability Analysis Method of Seismic Response for Earth-Rockfill Dams

Abstract

Seismic response probabilistic analysis for earth-rock dams is a crucial step in performance-based seismic safety evaluation. It represents a significant transition from deterministic analysis to stochastic analysis. To conduct such an analysis, it's essential to thoroughly consider the uncertainties associated with the seismic response of earth-rock dams and select appropriate and effective probabilistic analysis methods. In the following, the uncertainties present in the seismic response of earth-rock dams and the primary probabilistic analysis methods will be briefly outlined. Additionally, the theoretical foundation and solution procedures of these methods will be briefly introduced. This will establish the theoretical groundwork for subsequent analyses of stochastic dynamic responses and performance-based seismic safety evaluations for high concrete faced rockfill dams.

Bin Xu, Rui Pang

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Chapter 3. Stochastic Dynamic Analysis of CFRD Considering Randomness of Ground Motion

Abstract

With the improvement in the efficiency and accuracy of finite element numerical calculations, the nonlinear time history analysis method has gradually become the mainstream seismic safety assessment approach in the field of earth-rock dam engineering.

Bin Xu, Rui Pang

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Chapter 4. Stochastic Dynamic Analysis for High CFRD Considering Uncertainties of Material Parameters

Abstract

Due to the uncertainty of the source of dam construction materials for CFRD, the material model parameters should be uncertain values, so the traditional deterministic seismic safety evaluation method is difficult to objectively evaluate the CFRD, especially difficult to analyze from the perspective of the probability of performance, and there are only a small number of studies that consider the effect of uncertainty in the dam construction materials, and there is virtually no literature to consider the effect of the randomness of elasticity-plasticity parameters of the dam construction materials on the seismic There are only a few studies considering the effect of uncertainty of dam construction materials, and almost no literature considering the effect of randomness of elastic–plastic parameters of dam construction materials on the seismic response, while the effect of parameter uncertainty on the seismic response of CFRD cannot be ignored.

Bin Xu, Rui Pang

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Chapter 5. Stochastic Dynamic Analysis of CFRD Considering the Coupling Randomness of Ground Motion and Material Parameters

Abstract

Currently, in probabilistic fragility analysis, the randomness of ground motion and material parameters is typically addressed by randomly combining several ground motions selected from seismic databases and sampled material parameters (Xu et al., Journal of Hydroelectric Engineering 37:31–38, 2018). However, this approach lacks coupling effects, suffers from insufficient sample sizes or involves extensive computational efforts, thereby limiting the acquisition of comprehensive probability information. There are few studies on the coupling randomness of ground motion and material parameters on the dynamic response of structures, and even less on the seismic response of high CFRDs.

Bin Xu, Rui Pang

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Chapter 6. Stochastic Seismic Response and Performance Safety Evaluation for 3-D High CFRD

Abstract

It is widely recognized that high CFRDs, especially those with thinner slabs, exhibit significant three-dimensional effects. Three-dimensional finite element analysis offers a more realistic depiction of the stress distribution of the dam. However, there is a lack of studies that utilize stochastic dynamics and probabilistic analyses to investigate the seismic safety of three-dimensional CFRDs and establish corresponding safety evaluation criteria.

Bin Xu, Rui Pang

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Chapter 7. Stochastic Seismic Analysis and Performance Safety Evaluation for Slope Stability of High CFRDs

Abstract

Numerous engineering cases (Guan, Sci China Ser e: Technol Sci 52:820–834, 2009; Liu et al., J Perform Constr Facil 29:04,014,129, 2015), dynamic numerical analysis (Zou et al., Comput Geotech 49:111–122, 2013; Uddin, Comput Struct 72:409–421, 1999) and dynamic physical model tests (Zhu et al., Journal of Harbin Institute of Technology 18:132–138, 2011; Liu et al., Soil Dyn Earthq Eng 82:11–23, 2016) demonstrated that the instability of dam slopes is a major engineering concern for high CFRDs under earthquake excitation. It is explicitly mandated that seismic stability calculations for earth-rock dams should be included in seismic analysis in China's Hydraulic Seismic Design Code (NB 35047–2015). The comprehensive evaluation of slope stability is further specified to consider the factors such as the position, depth, and extent of the slip surface, as well as the duration and magnitude of stability index exceeding limits.

Bin Xu, Rui Pang

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Chapter 8. Performance Seismic Safety Evaluation

Abstract

CFRDs are inherently complex, and their dynamic response and seismic damage under seismic action are manifested in various aspects. However, due to the scarcity of seismic damage data and seismic codes specifically tailored for earth and rock dams, the focus remains primarily on three aspects: deformation of the dam body, stability of the dam slopes, and safety of the panels of the seepage control body. It is believed that the deformation of the dam body may influence the overall performance of the dam, while the stability of the dam slopes and the safety of the panels may affect local functionality to some extent. In this section, drawing upon the extensive finite element dynamic calculations and stochastic dynamic response analyses discussed earlier, we utilize the generalized probability density evolution method to establish the relationship between multi-seismic intensity, multiple performance targets, and destruction probability. Initially, we focus on the deformation of the dam body and the safety of the impermeable panel body.

Bin Xu, Rui Pang

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Chapter 9. Conclusion and Prospects

Abstract

In this study, an examination of the impact of uncertain factors on the seismic response of high CFRDs is conducted within the framework of stochastic dynamics. A comprehensive performance-based seismic safety evaluation framework is delineated. The investigation encompasses the stochastic nature of ground motion during seismic events, the inherent uncertainties associated with material parameters, and the interconnected randomness inherent in both ground motion and material parameters. The study proceeds by systematically addressing these uncertainties. A stochastic ground motion model, predicated upon the seismic specification spectrum of hydraulic engineering, is meticulously formulated.

Bin Xu, Rui Pang

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Title: Stochastic Dynamic Response Analysis and Performance-Based Seismic Safety Evaluation for High Concrete Faced Rockfill Dams
Authors: Bin Xu
Rui Pang
Publisher: Springer Nature Singapore
Electronic ISBN: 978-981-9771-98-1
Print ISBN: 978-981-9771-97-4
DOI: https://doi.org/10.1007/978-981-97-7198-1