• Vijayarajan S

The awareness on strengthening of structures came into being in the minds of engineers and scientists during the 1960s. Strengthening technique was essentially originated and developed keeping the bridge structures in mind. This technique was particularly a dire need for bridges because alternate solutions may affect the traffic conditions very seriously for a prolonged or unacceptable span of time. Further, it is always desirable to strengthen the structures rather than rebuild them. As long as effective techniques are available it is preferable to strengthen the structures to derive environmental and economic benefits out of such ventures. Retrofitting is making changes to an existing building to protect it from flooding or other hazards such as high winds and earthquakes. You have already seen an example of these changes, and you’ll learn more in the following chapters. But you may be wondering at this point why retrofitting is necessary. One reason is that construction technology, including both methods and materials, continues to improve, as does our knowledge of hazards and their effects on buildings. Many houses existing today were built when little was known about where and how often floods and other hazardous events would occur or how buildings should be protected, and houses being built today may benefit from improvements based on what we learn in the future. As a result, retrofitting has become a necessary and important tool in hazard mitigation.

Retrofitting, damage detection, strengthening, hazard prevention.

"RETROFITTING OF PCC BEAM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.111-115, June-2019, Available :http://www.jetir.org/papers/JETIR1907S85.pdf

"RETROFITTING OF PCC BEAM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp111-115, June-2019, Available at : http://www.jetir.org/papers/JETIR1907S85.pdf