钢管再生混凝土柱-再生混凝土短梁框架抗震性能及损伤演变

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (20) : 188-195.

论文

孟二从1，余亚琳1，张旭1，苏益声2，陈宗平2

作者信息 +

Seismic behavior and damage evolution of RAC filled steel tube column versus RAC short beam frame

MENG Ercong1 , YU Yalin1, ZHANG Xu1, SU Yisheng2, CHEN Zongping2

Author information +

文章历史 +

摘要

为研究钢管再生混凝土柱—再生混凝土短梁框架的抗震性能及损伤演变，以取代率为变化参数，设计制作了3榀不同取代率试件，对其进行低周反复加载试验，并基于Park-Ang双参数损伤评估模型，对其损伤演变进行分析。主要研究表明：不同取代率钢管再生混凝土柱—再生混凝土短梁框架试件的破坏形态均为脆性的剪切破坏；试件滞回曲线呈饱满的梭形，试验结束时试件的等效黏滞阻尼系数均达到0.3以上，表现出了良好的抗震耗能性能；随着取代率上升，试件骨架曲线下降段有变陡趋势；相比于取代率为0%的试件，50%及100%取代率试件的平均屈服及峰值荷载波动幅度均在5%以内，而延性系数则分别下降了9.70%及20%；试件屈服时的层间位移转角在1/107~1/95之间，可以满足结构在正常使用阶段的舒适度要求，破坏时的层间位移转角在1/39~1/36之间，表现出了良好的抗倒塌能力；取代率对试件刚度退化影响较小，不同取代率试件的刚度退化曲线近乎重合；加载初期，取代率对试件损伤演变影响不大，但随着加载位移增大，试件损伤程度随取代率增加而呈逐渐增大的变化趋势。

Abstract

To study the seismic performance and damage evolution of recycled aggregate concrete (RAC) filled steel tube column versus RAC short beam frame, three frame specimens with different replacement rates were designed and tested under cyclic reversed loading, and the damage evolution of specimens was analyzed based on a Park-Ang double parameter damage assessment model.The results mainly show that the failure form of RAC filled steel tube column versus RAC short beam frame with different replacement rate presents brittle shear failure.The hysteretic curves of specimens present plump shuttle shape, and all the he of specimens exceed 0.3 when the experiment ends, which shows the structure having good energy dissipation ability.With the increase of replacement rate, the descending section of specimen skeleton curve presents the trend of being steeper.Compared with the specimen with 0% replacement rate, the average yield and peak load change amplitude of the specimens with 50% and 100% replacement rate are both within 5%, and the ductility coefficient decreases 9.70% and 20%, respectively.The inter-story displacement angle of specimens is within 1/107~1/95 when yielded, and it can satisfy the comfortable requirement in normal service stage of the structure.The inter-story displacement angle of specimens is within 1/39~1/36 when destroyed, which shows good collapse resistance ability.Replacement rate has little effect on the specimen stiffness degradation, and the stiffness degradation curves of the specimens with different replacement rate are almost coinciding together.At the beginning of loading, replacement rate has little effect on the damage evolution of specimens, but with the increase of loading displacement, the damage degree of specimens gradually increases with replacement rate.

导出引用

孟二从1，余亚琳1，张旭1，苏益声2，陈宗平2. 钢管再生混凝土柱-再生混凝土短梁框架抗震性能及损伤演变[J]. 振动与冲击, 2019, 38(20): 188-195

MENG Ercong1,YU Yalin1, ZHANG Xu1, SU Yisheng2, CHEN Zongping2. Seismic behavior and damage evolution of RAC filled steel tube column versus RAC short beam frame[J]. Journal of Vibration and Shock, 2019, 38(20): 188-195

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