反复荷载下圆钢管型钢再生混凝土组合柱耗能能力及延性分析  

Analysis on the energy dissipation capacity and ductility of recycled concrete filled circular steel tube-profile steel composite columns under cyclic loading

作　　者：马辉[1,2] 胡杰江 赵艳丽 刘方达 席嘉诚 MA Hui;HU Jiejiang;ZHAO Yanli;LIU Fangda;XI Jiacheng(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China;School of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710048,China;Water Resources and Hydropower-Construction Survey and Design Co.,Ltd,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [2]西安理工大学土木建筑工程学院,陕西西安710048 [3]西安理工大学水利水电建筑勘测设计有限公司,陕西西安710048

出　　处：《世界地震工程》2024年第2期55-64,共10页World Earthquake Engineering

基　　金：国家自然科学基金项目(51408485);陕西省自然科学基础研究计划项目(2022JM-258);轨道交通基础设施性能监测与保障国家重点实验室开放课题(HJGZ2022105)。

摘　　要：对11个圆钢管型钢再生混凝土组合柱试件进行了低周反复荷载试验,观察了组合柱的破坏形态及特征,获取了组合柱的滞回曲线、等效粘滞阻尼系数、延性系数及侧向位移角等性能指标,分析了再生粗骨料取代率、型钢截面形式、轴压比、型钢配钢率和圆钢管径厚比等参数对组合柱耗能能力及延性的影响规律。结果表明:反复荷载作用下组合柱呈压弯塑性铰破坏模式;组合柱的荷载-位移滞回曲线饱满呈纺梭形,屈服位移后的等效粘滞阻尼系数在0.30~0.48之间,平均位移延性系数大于3.0,极限侧向位移角介于1/30~1/20之间且均大于规范限值1/50,组合柱表现出良好的耗能能力和延性。此外,组合柱的耗能能力和延性受再生粗骨料取代率的影响较大,全再生混凝土较普通混凝土耗能能力下降14.5%;增加钢管壁厚或型钢配钢率有利于提升组合柱的耗能能力和延性,而增大轴压比则对组合柱的延性和变形不利;内置型钢采用箱型截面时,组合柱耗能及延性最优,与工字型钢相比,采用箱型截面型钢的组合柱耗能能力和延性分别提升了23.5%和51.9%。The cyclic loading tests were conducted on 11 specimens of recycled concrete filled circular steel tube-profile steel composite columns.The failure modes and characteristics of composite columns were observed,and the performance indicators such as the hysteresis curves,equivalent viscous damping coefficients,ductility coefficients,and the lateral displacement angles of composite columns were also obtained.The influence of parameters such as the replacement rate of recycled coarse aggregate,cross-sectional form of profile steel,axial compression ratio,steel ratio of profile steel and the diameter to thickness ratio of circular steel tube on the energy dissipation capacity and ductility of composite columns was also analyzed in detail.The results indicate that the composite column exhibits a typical failure mode of the compression bending plastic hinge under cyclic loading.The load-displacement hysteresis curves of composite columns are full and spindle shaped,with the equivalent viscous damping coefficients of composite columns between 0.30 and 0.48 after the yielding displacement.The average ductility coefficients of composite columns are greater than 3.0,and the ultimate lateral displacement angles are between 1/30 and 1/20,both of which are greater than the standard limit value of 1/50,which comprehensively shows that the composite columns have good energy dissipation and ductility performance.In addition,the replacement rate of recycled coarse aggregate has a great impact on the energy consumption capacity and ductility of the composite columns,and the energy consumption of fully recycled concrete is reduced by 14.5%compared to ordinary concrete.Increasing the wall thickness of steel tube or profile steel ratio is beneficial for improving the energy consumption and ductility of composite columns,while increasing the axial compression ratio is detrimental to the ductility and deformation of composite columns.The composite column with the box shaped cross-sectional steel has the best energy consumption and ducti

关 键 词：圆钢管再生混凝土柱 型钢再生混凝土 滞回耗能 位移延性 抗震性能 

分 类 号：TU398[建筑科学—结构工程]