丁红岩^1,2, 张晓波¹, 杜闯^1,3, 张浦阳^1,2
AuthorsHTML:丁红岩^1,2, 张晓波¹, 杜闯^1,3, 张浦阳^1,2
AuthorsListE:Ding Hongyan^1,2, Zhang Xiaobo¹, Du Chuang ^1,3, Zhang Puyang ^1,2
AuthorsHTMLE:Ding Hongyan^1,2, Zhang Xiaobo¹, Du Chuang ^1,3, Zhang Puyang ^1,2
Unit:1. 天津大学建筑工程学院，天津 300072；2. 滨海土木工程结构与安全教育部重点实验室(天津大学)，天津 300072；3. 河北工业大学土木工程学院，天津 300401
Unit_EngLish:1．School of Civil Engineering, Tianjin University, Tianjin 300072, China
2．Key Laboratory of Coast Civil Structure Safety(Tianjin University), Ministry of Education, Tianjin 300072, China
3．School of Civil Engineering, Hebei University of Technology, Tianjin 300401, China
Abstract_Chinese:为了解新型预制管混凝土柱抗震性能, 制作了5根预制管混凝土柱, 其主要参数是核心区配置的钢筋笼或型钢．研究其在低周往复荷载作用下的破坏过程、滞回曲线、骨架曲线、承载力、变形、延性及耗能等力学性能．研究结果表明：无论核心区是否配置钢筋笼或型钢, 预制管混凝土的滞回曲线都很饱满, 表明其耗能能力较强．核心区配置钢筋笼或型钢预制管混凝土柱的承载力和延性明显得到提高, 平均极限承载力提高约25% , 平均延性系数提高约20% ．但核心区配置钢筋笼或型钢对预制管混凝土柱的抗裂承载力影响不大．同时研究表明, 预制管混凝土柱的破坏后期耗能不仅与每级位移下的耗能, 即单位位移等效黏滞阻尼系数有关, 更取决于后期破坏时的循环次数．核心区配置钢筋笼或型钢使预制管混凝土柱后期耗能次数明显增多, 表明具有更强的耗能能力.
Abstract_English:In order to understand the seismic performance of new concrete-filled precast concrete tubular column，five concrete-filled precast concrete tubular columns were tested，where reinforced steel cage or steel as main parameter，which was assembled in the concrete core area of concrete-filled precast concrete tubular columns. Researches were conducted on the failure process，the hysteretic loops，skeleton curve，bearing capacity，deformability，ductility and energy dissipation of specimens under low cyclic loading. The results show that，whether there is reinforced steel cage or steel in the middle concrete core area of concrete-filled precast concrete tubular columns or not，the hysteretic curve is plump，which indicates that concrete-filled precast concrete tubular columns has good energy dissipation. The bearing capacity and ductility of concrete-filled precast concrete tubular column with reinforced steel cage or steel in concrete core area are obviously improved，with the average ultimate bearing capacity increased by about 25% and the average ductility coefficient by about 20% . But reinforced steel cage or steel has little effect on the cracking load. At the same time，the results show that the energy dissipation in the later stage of specimens is related not only to the energy consumption at the displacement of each level，that is，the equivalent viscous damping coefficients at the unit displacement，but also to the number of cycles in the later stage of failure. For the concrete-filled precast concrete tubular column with reinforced steel cage or steel in concrete core area，the cycle number of energy consumption is increased significantly，indicating that it has a stronger energy dissipation capacity.
Keyword_Chinese:预制管混凝土柱; 滞回曲线; 耗能; 承载力; 型钢
Keywords_English:concrete-filled precast concrete tubular column; hysteretic loop; energy dissipation; bearing capacity; steel

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