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 use in the damage detection/health monitoring. The Hilbert-Huang transform (HHT) comprises the empirical mode decomposition (EMP) of the data and performing the Hilbert ...
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 beams are statically and dynamically loaded to correlate thedynamic characteristics of the beams to the damage level. A phenomenological model is developedto simulate 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 developed to avoid unexpected failure in structures. These damagedetection methods identify presence, location and magnitude of developed damage in the ...
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 ...
A wireless sensing system is designed for application to structural monitoring and damagedetection applications. Embedded in the wireless monitoring module is a two-tier predictionmodel, the auto-regressive (AR) and the autoregressive model with exogenous inputs (ARX),used to obtain damage sensitive features of a structure. To validate the performance of theproposed wireless monitoring and damage detection system, two near full scale single-storyRC-frames, with and without brick wall system, ...
vvThere has been much work published in recent years on the use of vibration characteristicsto detect damage in bridges. Almost all of this work has been based on theassumption that the vibration is linear, i.e. the natural frequencies are not dependent onthe amplitude of oscillation. The aim of the work presented here was to investigate thepossibility of using changes in the non-linear vibration characteristics to detect damagein reinforced concrete bridges.These changes in the non-linear ...
Abstract. A wireless sensing system is designed for application to structural monitoring and damagedetection applications. Embedded in the wireless monitoring module is a two-tier prediction model, the autoregressive(AR) and the autoregressive model with exogenous inputs (ARX), used to obtain damage sensitivefeatures of a structure. To validate the performance of the proposed wireless monitoring and damage detectionsystem, two near full scale single-story RC-frames, with and without brick wall ...
As a part of vital infrastructure and transportation networks, bridge structures must function safely at alltimes. However, due to heavier and faster moving vehicular loads and function adjustment, such asBusway accommodation, many bridges are now operating at an overload beyond their design capacity.Additionally, the huge renovation and replacement costs always make the infrastructure ownersdifficult to undertake. Structural health monitoring (SHM) is set to assess condition and ...
As a part of vital infrastructure and transportation networks, bridge structures must function safely at alltimes. However, due to heavier and faster moving vehicular loads and function adjustment, such asBusway accommodation, many bridges are now operating at an overload beyond their design capacity.Additionally, the huge renovation and replacement costs always make the infrastructure ownersdifficult to undertake. Structural health monitoring (SHM) is set to assess condition and ...
As a part of vital infrastructure and transportation networks, bridge structures must function safely at alltimes. However, due to heavier and faster moving vehicular loads and function adjustment, such asBusway accommodation, many bridges are now operating at an overload beyond their design capacity.Additionally, the huge renovation and replacement costs always make the infrastructure ownersdifficult to undertake. Structural health monitoring (SHM) is set to assess condition and ...