CAJ | 학술논문

基于对50根弯曲破坏钢筋混凝土圆柱低周反复试验结果的分析，建立了完整滞回环的数学表达式并推导得出等效阻尼比计算模型；以双柱墩桥梁为例，说明了建立桥梁整体结构等效阻尼比与墩柱端部塑性铰等效阻尼比关系的方法。研究表明，完整滞回环数学表达式较好地反映了弯曲破坏钢筋混凝土圆柱的滞回特性，得到的等效阻尼比模型计算结果与试验结果符合较好；采用建立的桥梁整体结构等效阻尼比与墩柱端部塑性铰等效阻尼比的关系进行 pushover 分析更能反映实际情况。采用等效阻尼比模型算得的目标位移与基于 Rosenblueth 模型和 Kowalsky 模型算得的位移之间存在较大差距。
기우대50근만곡파배강근혼응토원주저주반복시험결과적분석，건립료완정체회배적수학표체식병추도득출등효조니비계산모형；이쌍주돈교량위례，설명료건립교량정체결구등효조니비여돈주단부소성교등효조니비관계적방법。연구표명，완정체회배수학표체식교호지반영료만곡파배강근혼응토원주적체회특성，득도적등효조니비모형계산결과여시험결과부합교호；채용건립적교량정체결구등효조니비여돈주단부소성교등효조니비적관계진행 pushover 분석경능반영실제정황。채용등효조니비모형산득적목표위이여기우 Rosenblueth 모형화 Kowalsky 모형산득적위이지간존재교대차거。
Based on analysis of the test results of 50 RC specimens of circular columns failed in flexure,an expression for defining the hysteretic loop is proposed and a model for predicting the equivalent damping ratio is developed.The procedure for associating the equivalent damping ratio of a structure as a whole with those of its element is established by an example of double-column pier-bridge.It’s indicated that the expression of hysteretic loop proposed well defines the hysteretic loops of RC columns.Rational outcome can be expected when performing pushover analysis using the relationship of equivalent damping ratio of a bridge as a whole with those of its element.The target displacement predicted with the proposed model is different from those predicted with Rosenblueth’s model and Kowalsky’model.