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Structures in high seismic risk areas may be vulnerable to severe damage in a major earthquake. Structures designed to meet older code necessities may be at even greater risk. When these structures are evaluated with respect to current code criteria, it is observed that they lack of lateral strength or ductility. Since safety and economic considerations are major problems, these structures become viable candidates for retrofit and seismic strengthening. Diagonal bracing system is one of the retrofitting techniques and it provides an excellent approach for strengthening and stiffening existing building for lateral forces. Also, another potential advantage of this system is the comparatively small increase in mass associated with the retrofitting scheme since this is a great problem for several retrofitting techniques. In this study, the use of steel bracing for the strengthening of low, intermediate, and relatively low ductile reinforced concrete frames are investigated analytically. The ultimate lateral load capacities of the strengthened frames are determined by a load controlled static analysis. The tension member design based on IS: 800:2007 code and check its strength under earthquake loading.

Strengthing of Low Ductile Reinforced Concrete Frame Using XBracing with Different Details