EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF STEEL REINFORCED CONCRETE COLUMNS UNDER DIFFERENT LOADING SYSTEMS
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摘要: 通过3榀型钢混凝土柱的拟静力试验,研究不同加载制度下型钢混凝土柱的抗震性能。结果表明:1)远场加载制度下,随着同级位移循环次数的增加,试件的损伤程度加深、承载力降低幅度加大、耗能能力增强;位移角不超过1/50时,循环次数对试件的抗震性能影响较小,位移角1/40时,循环次数对试件的抗震性能影响显著;试件的极限变形和达到极限位移时的单周滞回耗能、等效黏滞阻尼比小,延性和极限耗能能力差。2)近场加载制度下,试件的裂缝数量少、混凝土压碎区域大,初始极限位移加载后试件的承载力大大降低,耗能能力得到充分发挥;试件的极限变形和达到极限位移时的单周滞回耗能、等效黏滞阻尼比大,延性和极限耗能能力强;再次增大位移加载,位移角不超过1/50时,试件的承载力和耗能能力变化很小,位移角1/40时,试件的承载力急剧降低、耗能能力快速增强。Abstract: Quasi-static loading tests of three SRC columns were conducted to compare the seismic behavior of SRC columns under different loading systems. The results showed that under the far-field loading system, the damage degree of specimen deepened, the bearing capacity of specimen decreased and the energy dissipation capacity of specimen enhanced with the increase of equal displacement cycle number; the cycle number had little effect on seismic behavior as the drift ratio was less than 1/50, and had significant effect on seismic behavior at the drift ratio 1/40; the ultimate deformation,one-cycle hysteresis energy dissipation and equivalent viscous damping coefficient reaching ultimate displace of specimen were small, the ductility and ultimate energy dissipation capacity of specimen were poor. Under the near-field loading system, the crack number of specimen was small and the concrete crushing area of specimen was large, the bearing capacity of specimen was reduced greatly after enduring the initial ultimate displacement loading, and the energy dissipation capacity of specimen was developed fully; the ultimate deformation,one-cycle hysteresis energy dissipation and equivalent viscous damping coefficient reaching ultimate displace of specimen were large, the ductility and ultimate energy dissipation capacity of specimen were strong; when loading against with increasing displacement, the bearing capacity and energy dissipation capacity of specimen had little change as the drift ratio was less than 1/50, and the bearing capacity of decreased sharply and the energy dissipation capacity increased rapidly at the drift ratio 1/40.
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徐龙军,胡进军,谢礼立.特殊长周期地震动的参数特征研究[J].地震工程与工程振动,2008,28(6):20-27. 周福霖,崔鸿超,安部重孝(日),等.东日本大地震灾害考察报告[J].建筑结构,2012(4):1-20. CHUNG Y, NAGAE T, HITAKA T,et al.Seismic Resistance Capacity of High-Rise Buildings Subjected to Long-Period Ground Motions:E-Defense Shaking Table Test[J].Journal of Structural Engineering, ASCE, 2010, 136(6):637-644. JI X, FENVES G L, KAJIWARA K, et al.Seismic Damage Detection of a Full-Scale Shaking Table Test Structure[J].Journal of Structural Engineering, ASCE, 2011,137(1):14-21. 刘力维,易伟建,谢春.近场地震下弯曲剪切破坏方柱抗震性能试验与数值模拟[J].地震工程与工程振动,2015,35(6):85-93. 颜学渊,祁皑,毛会敏,等.近场地震作用下巨-子隔震结构振动台试验[J].工程力学,2017,34(11):109-115,144. 石晶,白国良.空腹式型钢混凝土框架柱的恢复力特性[J].西安公路交通大学学报,2000(4):94-97. 王秋维,史庆轩,姜维山,等.新型截面型钢混凝土柱抗震性能试验研究[J].建筑结构学报,2013,34(11):123-129. 纪晓东,张明亮,刘平,等.钢管混凝土组合柱累积损伤性能试验研究[J].建筑结构学报,2013,34(12):35-44. 孙新宇. 基于长周期地震作用的框架梁抗震性能试验研究[D]. 北京:北京工业大学,2013. 李鹏. 基于性能抗震设计的钢筋混凝土柱试验研究[D]. 长沙:湖南大学,2012. 朱绩超,贡金鑫,熊亮军,等.不同循环次数下RC桥墩抗震性能试验研究[J].东南大学学报(自然科学版),2019,49(4):652-663.
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