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圆钢管再生镍铁渣混凝土柱冲击性能试验

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为研究掺镍铁渣钢管再生混凝土柱抗冲击性能,以粗骨料替代率、轴压比、落锤质量及冲击能量为变化参数,设计并制作了11根圆钢管再生混凝土柱.通过落锤冲击试验,得到了试件的破坏形态、位移时程曲线及冲击力时程曲线,研究了轴压比、粗骨料取代率、冲击能量和落锤质量对钢管再生混凝土柱侧向冲击性能的影响.结果表明:钢管再生混凝土柱抗冲击性能良好,能量吸收率基本恒定在67%左右;与取代率为0%相比,再生粗骨料取代率为30%时,试件跨中挠度平均降低8.9%;再生粗骨料取代率为70%时,试件跨中挠度平均降低11.4%;随着冲击能量的增加,试件跨中残余位移显著增大;轴压比在0～0.4以内,轴向力对钢管再生混凝土抗冲击性能有提高作用;落锤质量由330 kg增加至430 kg,冲击持续时间增加16%;套箍系数增大,跨中挠度减小.
Impact Performance Experiment of Recycled Ferronickel Slag Concrete Column with Round Steel Tube
In order to study the impact resistance of recycled concrete columns of steel tubular with nickel iron slag,11 specimens of recycled concrete columns of round steel tubes are designed with coarse aggregate substi-tution rate,axial compression ratio,weight of drop weight and impact energy as the changing parameters.The influence of axial compression ratio,coarse aggregate substitution rate,impact energy and drop weight steel tube on the lateral impact performance of recycled concrete column is studied.The results show that the impact resistance of recycled concrete filled steel tube column is good,and the energy absorption rate is basically con-stant at about 67%.Compared with the replacement rate of 0%,the mid-span deflection of the specimen de-creased by 8.9%on average when the replacement rate of recycled coarse aggregate is 30%.The replacement rate of recycled coarse aggregate is 70%,and the mid-span deflection of the specimen decreases by 11.4%on average.With the increase of impact energy,the mid-span residual displacement increases significantly.When the axial compression ratio is less than 0～0.4,the axial force can improve the impact resistance of recycled con-crete filled steel tube.The drop weight increases from 330 kg to 430 kg,and the impact duration increases by 16%.As the collar coefficient increases,the mid-span deflection decreases.

circular concrete filled concrete steel tube columnfalling weight impactimpact energyrecycled block concreteacceleration-time curveaxial compression ratio

罗才松、陈华艳、付朝江、邓蜀鹏、祁皑、王碧珍、张泽群

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福建理工大学福建省土木工程新技术与信息化重点实验室 福州,350118

福州大学土木工程学院 福州,350108

福建省中霖工程建设有限公司 南平,353000

侨智建设有限公司 福州,350000

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钢管混凝土柱 落锤冲击 冲击能量 再生块体混凝土 时程曲线 轴压比

福建省自然科学基金福建省住建厅科技资助项目福建省住建厅科技资助项目

2022J019282022-K-712022-K-305

2024

10.16450/j.cnki.issn.1004-6801.2024.02.013

振动、测试与诊断
南京航空航天大学 全国高校机械工程测试技术研究会

振动、测试与诊断

CSTPCD北大核心
影响因子：0.784
ISSN：1004-6801
年,卷(期)：2024.44(2)
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