对弹性阶段水下振动台试验中按比例模型设计的模拟法适用性的评估

IF 4.3 2区 工程技术 Q1 ENGINEERING, OCEAN Applied Ocean Research Pub Date : 2024-10-09 DOI:10.1016/j.apor.2024.104252
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引用次数: 0

摘要

本文对水下振动台(UST)模型试验中按比例模型设计的模拟定律的适用性进行了综合评估。本研究首先设计了跨海大桥桥墩的比例模型,考虑了五种模拟定律,并对每种模拟定律采用了不同的关键比例因子值。随后,根据经过验证的数值模型,生成了大量原型和比例模型响应的数值数据库,考虑了纯地震(E)、静水地震(ES)以及地震和波流耦合作用(EWC)下的结构。首先利用获得的数值结果研究了关键尺度因素对预测响应的影响。研究发现,密度和加速度变形会导致预测响应被低估,而几何变形则会导致预测响应被放大。此外,在数值数据库的支持下,还对设计缩放模型的相似性法则的适用性进行了评估。评估结果为在不同加载条件下正确设计按比例模型提供了有关选择和实施模拟法的建议。
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Evaluation on the applicability of similitude laws for scaled model design in underwater shaking table tests in the elastic stage
This paper presents a comprehensive evaluation on the applicability of similitude laws for scaled model design in underwater shaking table (UST) model tests. Scaled models of a sea-crossing bridge pier were first designed in this study, considering five similitude laws and adopting different values of key scale factors for each similitude law. Following this, an extensive numerical database of both prototype and scaled model responses was generated based on validated numerical models, considering structures under pure earthquake (E), earthquakes in still water (ES) as well as coupled earthquake and wave-current actions (EWC). The obtained numerical results were first utilized to investigate the influence of key scale factors on predicted responses. It has been found that density and acceleration distortion lead to underestimation of predicted responses, while geometry distortion results in amplifying predictions. Furthermore, the applicability of similitude laws for designing scaled models was evaluated underpinned by the numerical database. The evaluation results provided suggestions for the proper design of scaled models under different loading conditions, regarding the selection and implementation of similitude laws.
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来源期刊
Applied Ocean Research
Applied Ocean Research 地学-工程:大洋
CiteScore
8.70
自引率
7.00%
发文量
316
审稿时长
59 days
期刊介绍: The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.
期刊最新文献
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