摘要: A SERIES OF 12 REINFORCED CONCRETE CANTILEVER BEAMS WERE SUBJECTED TO REVERSALS OVERLOAD DETERMINE THE EFFECT LOAD HISTORY ON STRENGTH, DUCTILITY, AND MODE FAILURE BEAMS, RESULTS SHOWED THAT BEHAVIOR SPECIMENS UNDER REVERSAL WAS INFLUENCED PRIMARILY BY SHEER. CHANGES IN BEAM GEOMETRY OR WHICH REDUCED SHEAR FORCE INCREASED CAPACITY SIGNIFICANTLY ENERGY ABSORBING NUMBER CYCLES FAILURE. /AUTHOR/