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首先阐述了结构损伤识别与诊断在土木工程结构中的重要性,介绍了国内外损伤识别与诊断方法现状,在此基础上,又介绍了用于土木工程结构的各种损伤识别与诊断方法,最后提出了土木工程结构损伤识别与诊断的发展方向。 相似文献
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任海亮 《建筑·建材·装饰》2015,(6)
土木工程结构具有较低的振动水平、较大的自振频率、质量重、尺寸大,其动力响应很容易受到非结构构件和环境状态的影响。这就造成了土木工程结构的损伤诊断和健康监测具有一定的困难性。本文对土木工程结构的损伤诊断研究进展进行了分析,希望能够推动土木工程结构损伤诊断技术的不断发展。 相似文献
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土木工程结构的损伤诊断已成为当前国际土木工程领域研究热点之一。本文介绍了土木工程结构损伤诊断的任务和目标,系统阐述了结构损伤诊断的传统方法、静力方法和动力方法等,并对各自优缺点做出评价。最后对结构损伤诊断的研究提出了几点建议与展望。 相似文献
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从分析土木工程的现状着手,讲述了建筑物健康监测的必要性,分别从健康监测的定义、诊断方法、监测目标和发展历程等方面进行了论述,并结合国内外应用结构健康监测的工程案例进行了研究,最后对土木工程结构健康监测未来的发展方向进行了展望。 相似文献
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随着我国城市化进程加快,建筑业获得了前所未有的发展机遇,相应的土木工程安全问题也成了人们关注的热点问题。影响土木工程安全问题的主要因素就是土木工程的结构损伤和诊断。因此,对土木工程结构损伤诊断的研究已成为了一项重要的研究项目和课题,国际国内许多部门和企业都成立了专门的研究调查机构。收集了各方面的研究成果,并对土木工程结构损伤诊断的近期研究进展进行几点分析,希望能给一些朋友带来帮助。 相似文献
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土木工程结构损伤诊断研究进展 总被引:52,自引:1,他引:52
土木工程结构具有尺寸大、质量重、自振频率和振动水平较低等特点,其动力响应极容易受到不可预见的环境状态、非结构构件等的影响,这使得结构的健康监测和损伤诊断具有极大的挑战性,是近年来国际上研究的热点。本文综述了土木工程结构损伤诊断方法的最新进展,内容包括动力参数诊断方法、静力参数诊断方法、子结构方法、统计分析方法、神经网络方法等,同时简要介绍了与损伤诊断有关的系统识别与模型修正以及传感器优化布置等的研究进展,最后展望了结构损伤诊断的研究和发展方向。 相似文献
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阐述了土木工程结构健康监测与诊断的相关概念,介绍了一个完整的监测系统的组成,对传统与现在的监测手段进行了对比,最后指出其现存的问题,并对未来发展进行了展望。 相似文献
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利用动力测试信息对结构进行损伤诊断是目前土木工程领域的一个重要研究方向。对近年来研究比较集中的结构损伤诊断目标、诊断方法、测试信息等方面进行了归纳、讨论,并指出了今后的研究发展方向。 相似文献
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土木工程结构损伤检测的研究概述 总被引:1,自引:0,他引:1
介绍了基于振动的损伤识别方法的研究现状,根据响应数据种类的不同,将基于观测响应的结构损伤识别方法作了综述,同时指出了损伤识别方法还需要进一步解决的问题,从而推广土木工程结构损伤检测技术的应用。 相似文献
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混凝土大坝结构损伤检测振动法的可行性 总被引:3,自引:2,他引:3
首先对大坝安全监测与无损检测方面的研究现状、存在的问题进行了综述;在此基础上,阐述了大坝结构损伤检测振动法的基本概念及特点,对振动法在其他领域应用的研究情况作了简要介绍;并根据笔者的数值模拟研究结合其他相关研究,以及对一实际拱坝的初步测试,着重分析了用振动法进行混凝土大坝结构损伤检测的可行性,得出了用振动法检测大坝的结构损伤是完全有可能的;最后指出了用振动法进行混凝土大坝结构损伤检测还需要研究的问题. 相似文献
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《Structure and Infrastructure Engineering》2013,9(3):211-227
In this paper, a new approach for damage detection in beam-like structures is presented. The method can be used without the need for baseline modal parameters of the undamaged structure. Another advantage of the proposed method is that it can be implemented using a small number of sensors. In the proposed technique, the measured dynamic signals are decomposed into the wavelet packet decomposition (WPD) components, the power spectrum density (PSD) of each component is estimated and then a damage localisation indicator is computed to indicate the structural damage. The proposed method is firstly illustrated with a simulated beam and the identified damage is satisfactory with assumed damage. Then, the method is applied to a steel beam. The effect of damage location and the effects of wavelet type and the decomposition level are examined. The results show that the proposed method has great potential in crack detection of beam-like structures. 相似文献
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《Structure and Infrastructure Engineering》2013,9(10):1277-1293
This paper presents model-free damage identification and localisation methods based on two-sample control statistics as well as damage-sensitive features to be extracted from single- and multivariate regression models. For this purpose, sequential normalised likelihood ratio test and two-sample t-test are adopted to detect the change in two families of damage features based on the coefficients of four different linear regression models. The performance of combinations of these damage features, regression models and control statistics are compared through a scaled two-bay steel frame instrumented with a dense sensor network and excited by impact loading. It is shown that the presented methodologies are successful in detecting the timing and location of the structural damage, while having acceptable false detection quality. In addition, it is observed that incorporating multiple mathematical models, damage-sensitive features and change detection tests improve the overall performance of these model-free vibration-based structural damage detection procedures. 相似文献
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《Structure and Infrastructure Engineering》2013,9(6):708-727
Singular spectrum analysis (SSA) is a novel technique and has proven to be a powerful tool for time series data analysis. Through singular value decomposition of Hankel matrix data, the time series of data can be decomposed into several simple, independent and identifiable components from singular values and singular vectors. It has already been widely applied to process climatic, meteorological, geophysical and economic data. In this paper, we demonstrate that the coupling degree of the 1st and 2nd singular values in SSA contains useful indications on the feature and composition of the analysed signal. The proposed method is successfully applied to the monitoring of structure, such as damage detection of the simulated dynamic system, experimental steel frame, bridge foundation scouring and pier settlement in the laboratory and on-site bridge monitoring during typhoon strike. The proposed algorithm is simple and suitable for structural health monitoring in the field. 相似文献
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《The IES Journal Part A: Civil & Structural Engineering》2013,6(3):185-188
In this paper, a new structural damage detection approach based on changes in the generalised displacement is presented. The generalised displacement is first introduced, its curvature and change are then used to detect structural damage location. Compared with the conventional approach using the original displacement, the generalised displacement method is more effective and is more robust to the noise factors in this new approach. Finally, a numerical example for two-span beam is used to illustrate the effectiveness of this proposed method. 相似文献
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结合摄动理论,通过分析结构参数修改量高阶项的影响,推导了基于单元模态应变能的结构损伤评估方法;经数值仿真结果表明,其损伤定位准确、程度评估可靠,具有实际应用价值。 相似文献
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结合结构当前的服役状况,分析了对结构进行损伤检测的必要性和重要性,并对基于结构动力响应的结构损伤检测方法进行了介绍,探讨了该方法的优缺点和适用范围,指出了该方法的应用前景和需进一步研究的方向。 相似文献