Abstract
In recent decades, the increasing frequency and intensity of earthquakes in India have highlighted the urgent need for evaluating and strengthening existing building stock to ensure public safety and structural resilience. This experimental study focuses on the seismic evaluation of existing multistorey reinforced concrete (RC) and masonry buildings, integrating modern methodologies such as non-destructive testing (NDT), demand–capacity ratio (DCR) approach, pushover analysis, and field surveys. Drawing from the dissertation "Seismic Evaluation and Retrofit of Existing Multistorey Buildings in India," the research examines real-world applications through case studies in high-seismic zones like Guwahati (Zone V), Bhuj (Zone V), and Delhi (Zone IV). Experimental procedures include material characterization using rebound hammer, ultrasonic pulse velocity (UPV), core extraction, and half-cell potential tests to assess in-situ properties. Retrofitting strategies, such as concrete jacketing,