摘要
为揭示钢管再生混凝土组合柱在小偏压作用下的性能退化规律,以再生粗骨料取代率、偏心距和长细比为变化参数,进行了6个试件的小偏压试验和1个对比试件的轴压试验。在试验的基础上,分析了各试件的延性指标、耗能能力、侧向挠度变化的演化规律。研究结果表明:再生粗骨料取代率为50%的组合柱初始刚度最小;减小长细比有利于提高组合柱的极限承载力、延性和耗能能力;与轴压组合柱相比,小偏压组合柱的延性差,耗能能力也差;随着荷载的增加,组合柱的侧向挠度呈先缓慢再迅速发展的变化趋势。
In order to reveal the performance degradation rules of composite column with steel tube-confined recycled aggregate concrete under small eccentric compression,6 steel tube-confined recycled aggregate concrete small eccentric compressive composite columns and 1 steel tube-confined recycled aggregate concrete axially compressive composite column were designed. Several vary parameters of recycled coarse aggregate replacement ratio,eccentricity and slenderness ratio were conducted to compressive test. Based on the test,the evolution regularity of ductility index,energy dissipation capacity and lateral deflection of each specimen was analyzed. Results show that the minimum initial stiffness of specimens is 50% recycled coarse aggregate replacement ratio composite column. The decrease of slenderness ratio can be beneficial to increase the ultimate bearing capacity of composite columns. Compared with axial compression column,the ductility of small eccentric compressive composite columns is poor, and the energy dissipation performance is also poor. With the increase of loads,the lateral deflection of the composite column presentes a gradual to rapid development tendency.
出处
《四川建筑科学研究》
北大核心
2017年第6期1-4,共4页
Sichuan Building Science
基金
国家自然科学基金(51508112
51468003)
广西自然科学基金(2015GXNSFBA139210)
广西重点实验室系统性研究项目(2016ZDX02)
关键词
钢管再生混凝土
组合柱
小偏压
延性
耗能能力
侧向挠度
steel tube-confined recycled aggregate concrete
composite column
small eccentric compression
ductility
energy dissipation capacity
lateral deflection
