CALCULATION METHOD FOR LONG-TERM DEFLECTIONS OF REINFORCED CONCRETE SLABS BASED ON BOND CHARACTERISTIC BETWEEN BAR AND CONCRETE

Abstract

Deflections of reinforced concrete slabs increase by reduction of flexural rigidety and steel slippage at the fixed edge caused by cracking, and it increase furthermore with time by bond-creep between bar and concrete. Calculation method for long-term deflections in consideration of such characteristics were suggested, but those methods don't satisfy both accuracy and practicality. In the present study, we suggest the practical calculation method for long-term deflections based on bond-creep characteristic. The validity of this method was confirmed by the comparison with accurate calculation and experimental results, and the availability as a practical calculation method for long-term deflections was shown.