Comparative Analysis of Partial and Full CFRP Retrofitting Approaches for Enhancing Structural Integrity in Reinforced Concrete Frames After Column Removal

Abstract

Columns form an important part of structural RC frame because they carry the vertical and lateral loads down towards the foundation. When they collapse or are torn down because of the changes in space or accidental destruction, the threat of successive collapse appears much more probable. The conventional retrofitting process of carbon fiber-reinforced polymer (CFRP) normally involves full surface application that ultimately demand clearance of site, exposure of buildings, and discontinuation of business. This paper is fitted with yet another area of retrofitting in which bare column faces are isolated in order to be retrofitted so as to ensure that the impact is reduced to a minimum in an effort to produce a major improvement in the building. Partial and full CFRP retrofitting method was applied in determination of structural behavior of a three-story reinforced concrete frame under column removal loading conditions using state of the art modeling software (such as Tekla and ETABS). It shows that retrofit using bare surfaces can be highly effective, especially in load capacity and in stability, and it provides a low cost and operationally feasible option. The approach minimizes downtimes, does not require demolition and makes it possible to have constant functioning, so it is most appropriate in retrofitting projects of existing structures.