识别近断层脉冲地动的综合分类方法

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Yongbo Peng, Renjie Han
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引用次数: 0

摘要

从广泛的地面运动数据库中识别近断层脉冲样地面运动具有极其重要的意义,因为它为进一步研究这种特定类型的地面运动提供了关键基础,包括对这种随机过程进行建模,以及对其对结构和基础设施系统的潜在影响进行全面分析。目前,已经出现了一系列用于识别脉冲地动的定量方法,所有这些方法都在各自的研究范围内表现出良好的准确性。然而,由于每种方法在识别特定情况时存在局限性,这些不同的方法往往会对某些地动记录产生不一致的结果,这对建立仅依赖于单一识别方法的可靠分类标准构成了巨大挑战。为解决这一问题,本研究采用了一种多元方法。它没有改进单一的基于时频分析的识别方法,而是通过对该领域的系统概述,对七种基准方法进行了仔细的筛选。通过利用层次分析法(AHP),开发出一种综合分类方法,整合了每种方法的优势,从而形成一种更稳健、更可信的分类标准。根据设计的类别指标,地面运动可分为四类:A 类包括明确的脉冲样地动;B 类包括明显的脉冲样地动;C 类包括可能的脉冲样地动;D 类包括不可能表现出脉冲样特征的地动。它提供了一种更精细的分类方法,超越了与传统单倍分类方法相关的脉冲样地动和非脉冲样地动的二元区分。为了验证,我们使用了一个基本数据集,其中包括来自 NGA-West 2 数据库的近断层地动记录。为了验证综合分类方法,还使用了由 FEMA 和 PEER 建议的两个脉冲样地震动记录数据集和 1999 年 Chi-Chi 地震期间收集的一个地震动记录数据集。数值示例说明了所提方法在根据不同程度的脉冲样特征识别近断层脉冲样地动方面的显著效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A comprehensive categorization method for identifying near-fault pulse-like ground motions

Identifying near-fault pulse-like ground motions from extensive ground motion databases holds paramount importance, as it provides a pivotal foundation for further inquiries into this specific type of ground motions, including the modeling of such stochastic processes as well as thorough analysis of their potential impact on structures and infrastructure systems. Currently, a diverse array of quantitative methods for identifying pulse-like ground motions have emerged, all of which demonstrate good accuracy within their respective research scopes. However, due to the limitations of each individual method in identifying specific cases, these diverse approaches often yield inconsistent results for certain ground motion records, posing a significant challenge in establishing a reliable classification criterion that relies solely on a single identification method. To address this issue, the present study adopts a multifaceted approach. Instead of improving a single time-frequency analysis-based identification method, it carefully conducts a selection of seven baseline methods through a systematic overview of the field. By leveraging the analytic hierarchy process (AHP), a comprehensive categorization method is developed that integrates the strengths of each approach, resulting in a more robust and credible classification criterion. According to the devised category indicator, ground motions can be classified into four categories: Category A comprises definitively pulse-like ground motions; Category B comprises apparently pulse-like ground motions; Category C consists of probably pulse-like ground motions; and Category D encompasses ground motions unlikely to exhibit pulse-like characteristics. It provides a more elaborate classification beyond the binary distinction of pulse-like and non-pulse-like ground motions associated with traditional onefold classification methods. For validation purposes, a basic dataset comprising near-fault ground motion records from the NGA-West 2 database has been utilized. To verify the comprehensive categorization method, two datasets of pulse-like ground motion records suggested by FEMA and PEER and one dataset of ground motion records collected during the 1999 Chi-Chi earthquake are addressed. Numerical examples illustrate the remarkable effectiveness of the proposed method in identifying near-fault pulse-like ground motions based on their varying degrees of pulse-like characteristics.

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来源期刊
Earthquake Engineering & Structural Dynamics
Earthquake Engineering & Structural Dynamics 工程技术-工程:地质
CiteScore
7.20
自引率
13.30%
发文量
180
审稿时长
4.8 months
期刊介绍: Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.
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