Evaluation of Seismic Vulnerability and Rehabilitation of an Abandoned Two-Storey Building

Abstract

Structural Deterioration is the results of both gradual and unexpected damaging events. The modelling of structural deterioration has been shown to be great importance for decisions about maintenance and reconstruction of critical infrastructure. Ensuring structures undergo regular inspection and maintenance is crucial to avoid deterioration. The purpose of this study was to determine the effectiveness of the concrete jacketing method for fortifying a deteriorating two-storey reinforced concrete building that had been left unattended for over seven years. This building showed significant degradation, including reinforcement corrosion and concrete spalling. Also, it offers insights into the effectiveness of concrete jacketing for evaluating and retrofitting structures through a comprehensive analysis of critical structural components such as columns, beams, slabs, and footings. Additionally, pertinent documents including existing plans, geotechnical reports, and hazard assessments reports were gathered for a thorough assessment. The findings of the Rebound Hammer, Tensile, and Concrete Core Tests revealed inadequate material strength. The structural elements were also inspected by the researcher, revealing insufficient reinforcement and deviations from the approved plans. All test results were used in the building analysis using Non-Linear Static Analysis with Seismobuild Software. Based on the prepared retrofitting plans and cost estimates, the total retrofitting cost is Php1,122,607.50.