Hysteresis and damping mechanism of reinforced concrete member before flexural yielding

通过钢筋混凝土构件受弯屈服破坏的循环加载试验，研究了构件的滞回特性和阻尼机理。试验结果表明，钢筋与混凝土粘结劣化对钢筋屈曲屈服前后的滞回阻尼影响较大。试验结果得到的等效阻尼系数随着钢筋与混凝土的极限粘结强度与设计粘结强度余量的增大而增大。

Cyclic loading tests of reinforced concrete member fails in flexural yielding were conducted to study hysteresis and mechanism of damping. The experimental test results showed that hysteresis damping between before flexural yielding and after was greatly affected by deterioration of bond between steel rebar and concrete. Equivalent damping factor obtained from the test result was increased as the margin of ultimate bond strength between steel rebar and concrete to design bond strength was increased.