利用桥梁临界频率的创新桥梁健康诊断模型

IF 3.6 2区 工程技术 Q1 ENGINEERING, CIVIL
Min-Yuan Cheng, Moh Nur Sholeh, You-Gang Guo
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引用次数: 0

摘要

台湾目前的桥梁常规检测方法主要依靠 DER&U 视觉检测,强调简便、省时。然而,其准确性取决于检测人员的经验,无法评估外部攻击对内部支柱造成的损坏。台湾公路管理局普遍采用的直接方法在获取桥梁动态特性的同时,需要在桥梁上直接安装振动传感器,耗费大量时间和成本。本研究引入了一种间接方法,通过将传感器安装在车辆上而不是桥梁上,提高了便携性和成本效益。为了建立桥梁健康标准,本研究开发了桥梁模型并进行了推移分析,以推测桥梁振动频率比(\({R}_{ec}\) 和 \({R}_{sc}\))的变化。该比率是确定桥梁安全性的重要参考。为减少时间和成本限制,研究采用了混合共生有机体搜索-最小二乘支持向量机(SOS-LSSVM)来计算 \({R}_{ec}\) 和 \({R}_{sc}\) 。结果可以确定桥梁安全标准的振动频率比。该间接方法对台湾公路管理部门很有价值,可以测量正常情况下和灾后的桥梁频率,便于及时做出桥梁开放的决策,并为基于桥梁健康评估的定期维护提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Innovated bridge health diagnosis model using bridge critical frequency ratio

Innovated bridge health diagnosis model using bridge critical frequency ratio

The current bridge routine detection method in Taiwan relies on DER&U visual inspection, emphasizing ease and time efficiency. However, its accuracy is contingent on inspectors' experience and fails to assess internal pillar damage from external attacks. The prevalent direct approach in Taiwan Highway Administration, while obtaining dynamic bridge properties, involves mounting vibration sensors directly on the bridge, incurring significant time and cost. This research introduces an indirect approach, enhancing portability and cost-effectiveness by installing sensors on vehicles rather than bridges. To establish a bridge health standard, the study develops bridge models and conducts pushover analyses to speculate on the variation of the bridge vibration frequency ratio (\({R}_{ec}\) and \({R}_{sc}\)). This ratio serves as a crucial reference for determining bridge safety. To mitigate time and cost constraints, the research employs a hybrid symbiotic organisms search-least squares support vector machine (SOS-LSSVM) for \({R}_{ec}\) and \({R}_{sc}\). The results enable the determination of vibration frequency ratios for the bridge safety standard. The indirect approach proves valuable for the Taiwan Highway Administration, allowing bridge frequency measurement under normal circumstances and post-disaster, facilitating timely decisions on bridge openings and providing a reference for regular maintenance based on bridge health assessments.

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来源期刊
Journal of Civil Structural Health Monitoring
Journal of Civil Structural Health Monitoring Engineering-Safety, Risk, Reliability and Quality
CiteScore
8.10
自引率
11.40%
发文量
105
期刊介绍: The Journal of Civil Structural Health Monitoring (JCSHM) publishes articles to advance the understanding and the application of health monitoring methods for the condition assessment and management of civil infrastructure systems. JCSHM serves as a focal point for sharing knowledge and experience in technologies impacting the discipline of Civionics and Civil Structural Health Monitoring, especially in terms of load capacity ratings and service life estimation.
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