Title : SEISMIC REQUALIFICATION AND RETROFITTING SCHEMES FOR EXISTING RC STRUCTURES: A CASE STUDY
Authors : Saha Dauji, SandipBhalerao, PadigelaSubramanyam, Sudin Sharma, Mahesh Babu Addala, Kapilesh Bhargava, G G S Achary, S V R Subramanyam, Kailash Agarwal, Sekhar Basu
Publication : 8 - 10, October 2015
Volume : 2
Pages :
Price : 250
Abstract : In general, the important infrastructure facilities made of concrete have service life of more than 50 years and are in service for even longer periods. Due to upward revision of the design codes of practice (ex. Seismic codes defining the seismic ground motion parameters) or some changes in the functional requirements and loadings these existing concrete structures may require requalification, and in some cases, retrofitting. During requalification, the increase of concrete strength with age and / or the degradation due to the exposure to the environment should be ascertained throughnon-destructive tests. The retrofitting strategy should take into consideration several factors like accessibility, feasibility of the proposed retrofit to be carriedout at site, the cost involved etc. Further, though there are standard retrofit practices available, the scheme would require case to case evaluation and may even call for innovative applications. In the paper the strategy which had been adopted for requalifying and retrofitting an important reinforced concrete structure has been taken as a case study and the various schemes adopted have been discussed. This information would be helpful for the professionals involved in requalification and retrofitting of existing concrete structures.