The safety and serviceability of civil infrastructures have to be ensured either as part of a periodic inspection program or immediately following a given hazardous event. The use of digital imaging techniques to identify the deformed or deteriorated surfaces of structures is a substantial area of research and aims to investigate a number of unknown parameters, including damage quantification and condition rating. This manuscript illustrates the integration of previously developed fuzzy logic-based decision-making tools with the currently developed image processing algorithm to quantify the damage for the condition rating of civil infrastructures. The proposed integrated framework exploits visual specifics of different elements of the infrastructure to perform automated evaluation of structural anomalies such as cracks and surface degradation. Two different image segmentation tools, (1) bottom hat transform and (2) hue, saturation, color (HSV) thresholding, are applied to identify the surface defects. The developed image processing software is used with the fuzzy set framework proposed in the previous research to gauge the damage indices due to various deterioration types like corrosion, alkali aggregate reaction, freeze-thaw attack, sulfate attack, acid attack or loading, fatigue, shrinkage, and honeycombing. Case studies of a long-span bridge and a warehouse building are illustrated for concept validation. The refined comprehensive method is presented as a graphical user interface (GUI) to facilitate the real-time condition assessment of civil infrastructures.
Open Ground Storey buildings (OGS) are commonly constructed in the UAE, since these buildings has some functional advantage as parking, shop etc. However, they can be a hazard during an earthquake. In this study, a real building located in Al Muraqqabatm Dubai is chosen. This building is a type of OGS building coupled with shearwall. To understand the behaviour and strength of buildings a non-linear Static Analysis (Pushover Analysis) is carried out to determine the force capacity by applying lateral load from different direction that will allows to evaluate the building beyond elastic range. Building frame were analysed, for bare frames and infilled frames. Seismostruct [1] software was used for analyses to understand as Lateral Displacement profile, Storey Shear, Storey Drift and Base-shear force, in a result to generate Capacity Curve for both frames.
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