Title : RETROFITTING OF STRUCTURES AGAINST SEISMIC ACTIONS
Authors : P.B.R. Dissanayake, A.M.A.C.S. Bandara and K.T.S. Karunanayake
Publication : 13th – 16th February 2013
Volume :
Pages : 8-Jan
Price : 250
Abstract : Many of the existing structures are not designed for earthquake actions. Records of damage caused by past earthquakes indicate that the cause of failure of many structures is their poor performance during earthquakes. Therefore, it is very important to monitor the health of structures throughout their service life and use effective retrofitting methods to strengthen them. In recent years there have been significant improvements in retrofitting techniques. This study highlights the principles of assessing and retrofitting of structures against earthquakes. It describes some of the assessment methods and practically implemented retrofitting procedures using a case study of four storeys reinforced concrete building. The structural integrity investigation, retrofitting designs and performance verifications were first done using finite element models. The model was then used to check the behaviour of the structure during earthquake loading after the retrofitting. Application of steel and concrete jacketing and fibre reinforced polymer composites on structural elements to improve the load bearing capacity of individual structural elements and various other retrofitting techniques such as adding shear walls and shear cores to improve overall stability are discussed.