PSI - Issue 52

Rakesh Katam et al. / Procedia Structural Integrity 52 (2024) 72–88 Rakesh Katam/ Structural Integrity Procedia 00 (2019) 000 – 000

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two tests and a compressive testing test. The structural health monitoring was done in the lab and on-site using NDT techniques such as UPV and RH. The experimental examination employing NDT methods revealed that compressive strength, RH, and UPV had a strong relationship. The RH provides a way for achieving concrete strength with a ±15 to ±20% accuracy, whereas the UPV method is an ideal instrument for both existing and under-construction structures with accuracy within ±20%. With the advancement in technology author, Amini et al. (2016) worked on 84 concrete cylinder samples that were subjected to UPV and RH tests, measured, and prediction models created. Results showed that UPV and RH can be used together in a quadratic polynomial model framework, and a concrete quality classification table was proposed. 3. Methodology Building assessment is done using traditional methods such as visual inspection, conditional mapping, non destructive testing, and numerical modelling. NDT (Chrisp et al. (1993)) is used to assess the stability and structural integrity of the existing building, followed by RH, UPV, half-cell potential, crack width, profo-meter, and carbonation tests. Results are used to develop a numerical model to know the building's serviceability and safety (Masood et al. (2021)). In Fig. 3, the building's structural elements are shown along with neighbourhood columns that are connected to the ends of the other building columns.

Fig. 3. Structural plan of a residential building.

3.1. Visual inspection The state and extent of the structure's damage were assessed visually to find flaws like cracks, spalling, leakage spots, and moisture. It is found that the majority of the ground-floor columns and beams have cracks during the examination, and slab panels have moisture and dampness. During the examination, the initial treatment for the slab and beam is observed. The geometrical specifications of the building are measured during the inspection, with values presented in Table 1.

Table 1. Building details observed from visual inspection. Description

Details

Building Type

RCC framed structure G+2 (Three stories)

Stories