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首页> 外文期刊>Bulletin of earthquake engineering >Structure-specific selection of earthquake ground motions for the reliable design and assessment of structures
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Structure-specific selection of earthquake ground motions for the reliable design and assessment of structures

机译：地震地面运动的结构特定选择，可靠的设计和评估结构

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摘要

A decision support process is presented to accommodate selecting and scaling of earthquake motions as required for the time domain analysis of structures. Code-compatible suites of seismic motions are provided being, at the same time, prequalified through a multi-criterion approach to induce response parameters with reduced variability. The latter is imperative to increase the reliability of the average response values, normally required for the code-prescribed design verification of structures. Structural attributes like the dynamic characteristics as well as criteria related to variability of seismic motions and their compliance with a target spectrum are quantified through a newly introduced index, delta(sv-sc) , which aims to prioritize motions suites for response history analysis. To demonstrate the applicability of the procedure presented, the structural model of a multi-story building was subjected to numerous suites of motions that were highly ranked according to both the proposed approach (delta(sv-sc) ) and the conventional one (delta(conv) ), that is commonly used for earthquake records selection and scaling. The findings from numerous linear response history analyses reveal the superiority of the proposed multi-criterion approach, as it extensively reduces the intra-suite structural response variability and consequently, increases the reliability of the design values. The relation between the target reliability in assessing structural response and the size of the suite of motions selected was also investigated, further demonstrating the efficiency of the proposed selection procedure to achieve higher response reliability levels with smaller samples of ground motion.
机译：提出了决策支持过程，以适应地震动作的选择和缩放，因为结构的时域分析所需的结构。同时提供抗震运动的代码兼容套件，通过多标准方法进行预结，以引导响应参数降低可变性。后者必须增加平均响应值的可靠性，通常需要对结构的代码规定的设计验证。通过新引进的指数，Delta（SV-SC）量化了与地震运动的变异性及其与地震运动的可变性相关的结构属性以及与目标频谱的遵守相关的标准，其旨在优先考虑响应历史分析的运动套件优先考虑运动套件。为了证明所提出的程序的适用性，多层建筑的结构模型受到许多根据所提出的方法（Delta（SV-SC））和常规（Delta（ Conv）），这通常用于地震记录选择和缩放。许多线性响应历史分析的发现揭示了所提出的多标准方法的优越性，因为它广泛地减少了套箱内的结构响应变异性，因此增加了设计值的可靠性。还研究了评估结构响应的目标可靠性与所选运动套件的大小之间的关系，进一步证明了所提出的选择程序的效率，以实现更高的响应可靠性水平，具有较小的地面运动样本。

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