000010093 001__ 10093
000010093 005__ 20141205154143.0
000010093 04107 $$aeng
000010093 046__ $$k2008-10-12
000010093 100__ $$aGnanasekaran, K.
000010093 24500 $$aAn Investigation of Seismic Retrofit of Columns in Buildings Using Concrete Jacket

000010093 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010093 260__ $$b
000010093 506__ $$arestricted
000010093 520__ $$2eng$$aThe columns in a typical reinforced concrete multi-storeyed building in India, especially with an open ground storey, are found to be deficient to resist seismic forces. One option of retrofitting the columns is to jacket them with concrete. The conventional analysis of a jacketed column investigates the strength based on interaction diagrams for the composite section or for some equivalent section. The present study investigates the performance of columns jacketed by a certain scheme of reinforcement. First, prism specimens with new concrete cast against the sloping faces of old concrete were tested under compression (slant shear test) to study the interface between old and new concrete. Second, column specimens were tested under pure compression, eccentric compression and pure bending to study the effect of jacketing on the strength. Finally, beam-column sub-assemblages with reference and retrofitted columns, were tested under monotonic and cyclic lateral loads in presence of constant vertical loads. From the tests, it was found that the lateral strength, ductility and energy absorption capacities of the retrofitted specimens were higher than the corresponding reference specimens as per prediction. A lamellar analysis was used for the prediction of the moment versus curvature behavior of a retrofitted column section. An incremental nonlinear approach was used to predict the lateral load versus displacement behavior of the retrofitted sub-assemblage tested under monotonic lateral load. The scheme of strengthening a column is explained with reference to the practical considerations of an existing building.

000010093 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010093 653__ $$aConcrete jacket, column, lamellar analysis, multi-storeyed building, reinforced concrete.

000010093 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010093 720__ $$aGnanasekaran, K.$$iSengupta, Amlan K.
000010093 8560_ $$ffischerc@itam.cas.cz
000010093 8564_ $$s622722$$uhttps://invenio.itam.cas.cz/record/10093/files/12-03-0051.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 12-03-0051.
000010093 962__ $$r9324
000010093 980__ $$aPAPER