CAJ | 학술논문

分别对1/4缩尺且平立面相同的现浇和预制再生混凝土框架结构模型进行了振动台试验，对比研究了2个再生混凝土框架的自振频率、楼层剪力、楼层位移、层间位移等动力反应以及刚度退化、延性等抗震性能。对比分析表明，在弹性和弹塑性阶段前期，随着台面输入加速度峰值的增加，2个模型均呈现自振频率下降、楼层剪力和位移反应逐渐增大的趋势，且动力反应变化趋势和抗震性能差别不大；在弹塑性阶段后期，预制框架后浇节点破坏程度较明显，结构承载力低于现浇框架结构，且刚度退化更为迅速，层间位移较现浇框架结构明显偏大。预制再生混凝土框架抗震能力总体略差于现浇框架，但施工方式的不同对结构延性系数影响不明显。
분별대1/4축척차평립면상동적현요화예제재생혼응토광가결구모형진행료진동태시험，대비연구료2개재생혼응토광가적자진빈솔、루층전력、루층위이、층간위이등동력반응이급강도퇴화、연성등항진성능。대비분석표명，재탄성화탄소성계단전기，수착태면수입가속도봉치적증가，2개모형균정현자진빈솔하강、루층전력화위이반응축점증대적추세，차동력반응변화추세화항진성능차별불대；재탄소성계단후기，예제광가후요절점파배정도교명현，결구승재력저우현요광가결구，차강도퇴화경위신속，층간위이교현요광가결구명현편대。예제재생혼응토광가항진능력총체략차우현요광가，단시공방식적불동대결구연성계수영향불명현。
One cast-in-situ and one precast one-fourth scaled recycled aggregate concrete (RAC ) frame structure model with the same plane and elevation were tested on the shaking table,respective-ly.The dynamic responses including natural frequency,inter-storey shear force,storey displacement and inter-storey displacement and the seismic performances including stiffness degradation and ductility of the two models were investigated comparatively.The comparative analysis indicates that in the elas-tic and early elasto-plastic stages,both of the two models present similar dynamic response trends with the increase in peak ground acceleration (PGA);that is,the natural frequency descends,and the in-ter-storey shear force and the displacement increase gradually.The damage of the precast frame joint is more serious in the later elasto-plastic stage;therefore the bearing capacity is lower than that of the cast-in-situ one.Furthermore,compared with the cast-in-situ frame the stiffness deterioration of the precast frame is more rapid and the inter-storey displacement is obviously larger at this stage.The overall seismic performance of the precast RAC frame is inferior to that of the cast-in-situ one,but the influence of the different construction methods on the ductility coefficient is negligible.