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Integrated health monitoring of structures, made possible by advances in sensor technology, isimproving structural reliability, longevity, system performance, and safety against natural hazards andintentional attack. Current technology is moving beyond the embryonic stage and is becoming able tomeet the challenges associated ...

In this paper, a combined approach to damage diagnosis of systems is proposed. The intention is to identify thenatural frequencies and the presence of damage. In a first step, the basic concept of the Hilbert HuangTransform is presented where the empirical mode decomposition is applied on the signal using a sifting processto ...

The detection of damage in reinforced concrete bridge using vibration characteristics has been the topic of much research in the last two decades. Since reinforced concrete structures are nonlinear in behaviour, even with relatively low levels of damage, it is difficult to make a reliable estimate on the modal properties for ...

An objective of the structural health monitoring system is to identify the state of the structure and to detect its damagesafter a major event, such as the earthquake, to ensure the reliability and safety of structures. Innovative analysistechniques for the damage detection of structures have been extensively studied recently. ...

A new indicator is proposed to facilitate the detection of newly induced damage in reinforced concrete(RC) beams, based on the transient characteristics of nonlinear vibration. Two full-scale RC beams,one reinforced with externally bonded fiber-reinforced-polymer sheets, are tested to develop theproposed damage indicator. Both ...

An innovative Hilbert–Huang transform (HHT) based frequency identification approach designated as adaptive magnitude spectrum algorithm(AMSA) is proposed in this paper. Characterized by the a posteriori property, the AMSA does not need the a priori information about the modalfrequencies to be identified, and the ...

This paper presents the sensitivity analysis of Hilbert-Huang transform (HHT) basedadaptive magnitude spectrum algorithm (AMSA) identified modal frequencies ofreinforced concrete frame structures in both undamaged and damaged states.Characterized by the a posteriori property, the recently proposed AMSA provides analternative ...

A signal processing method for structural healthmonitoring is applied to detect damage in theformer Imperial County Services (ICS) Building,caused by the 1979 Imperial Valley earthquake insouthern California. The building response wasrecorded by a 13-chanel array of accelerometers,and a description of the distribution of the ...

As novel construction materials become more economically and technically available throughout theglobe, the structures become more complex. Therefore, an unexpected failure of these structures causescatastrophic economical and fatal losses. Over the past decades, a number of vibration based damagedetection techniques have been ...

The results of the seismic tests on several reinforced-concrete shear walls and a four-storey frame are analysed in this paper. Each specimen was submitted to the action of a horizontal accelerogram, with successive growing amplitudes, using the pseudodynamic method. An analysis of the results allows knowing the evolution of ...

1Civil Engineering Department, University of Malaya, 50603 Kuala Lumpur, Malaysia2Mechanical Engineering Department, University of Malaya, 50603 Kuala Lumpur, Malaysia3Mechanical Engineering Department, Universiti Malaysia Pahang, Kuantan, Malaysia ...