STEEL BAR FRACTURE OF REINFORCED CONCRETE FRAME UNDER EXTREMELY STRONG SEISMIC LOAD

摘要

Steel bar fracture of reinforced concrete (RC) column under strong cyclic load has been tested. On the basis of the test results, the steel bar fracture of specimen is considered as the very low cycle fatigue behavior and the calculation method of steel bar fracture is derived by the use of Coffin-Manson equation and the Palmgren-Miner rule. The obtained damage ratio equation of steel bar fracture can be easily applied to the seismic response damage analysis of multi-story RC frame under extremely strong ground motion. By the use of the derived damage analysis method, the effects of design conditions on the seismic response damage of RC frame are investigated.