(1 天津大学建筑设计规划研究总院有限公司, 天津 300073; 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 天津大学建筑工程学院, 天津 300072)

摘要: 基于离心预制混凝土组合柱抗震性能试验,采用 ABAQUS 软件对该类型组合柱在轴压及水平往复荷载作用下的受力性能进行了非线性有限元分析,研究了轴压比、预制管及芯部混凝土强度、体积配箍率和预制管空心率对柱承载力及变形能力的影响. 并采用拟合法建立了适用于该类型组合柱的恢复力模型. 研究结果表明:有限元结果与试验结果吻合较好,在轴压及水平往复荷载作用下,柱的破坏模式为压弯破坏,耗能能力较好. 柱承载力随轴压比增加而提高,但变形能力降低,当轴压比超过临界值时,柱的受力状态转为小偏心受压,承载力降低;提高预制管或芯部混凝土强度可提高柱承载力,但会降低柱的变形性能;提高体积配箍率及降低预制管空心率可改善柱的变形能力,当空心率降低至 20%后,其影响可忽略. 本文所建立的恢复力模型与试验结果吻合较好,能够较为准确地模拟该类型组合柱的滞回特性.

关键词: 离心预制混凝土管组合柱; 抗震性能; 参数分析; 恢复力模型; 破坏模式

中图分类号:TU375. 3 文献标志码:A 文章编号:1002-848X(2023)03-0052-12

DOI:10. 19701 / j. jzjg. 20201254

Finite element analysis on seismic behavior and research on restoring force model of concrete-filled centrifugal precast concrete tube columns

ZHANG Xizhi1,2, ZHANG Tianhe3, ZHANG Shaohua1, ZHANG Yuxin3, LI Xingqian3

(1 Tianjin University Research Institute of Architectural Design and Urban Planning Co. , Ltd. , Tianjin 300073, China;2 Key Laborary of Coast Civil Structure Safety of the Ministry of Education (Tianjin University), Tianjin 300072, China;3 School of Civil Engineering, Tianjin University, Tianjin 300072, China)

Abstract: Based on experimental on seismic behavior of concrete-filled centrifugal precast concrete tube columns, thenonlinear finite element analysis of mechanical behaviors of the columns under axial compression loads and lateral cyclicloads was carried out by using ABAQUS software. The influences of axial compression ratio, the strengths of the precasttube and core concrete, volume ratio of transverse stirrups and hollow ratio of the precast tube on the bearing anddeformation capacity of the columns were studied. The restoring force model of the columns was established by fittingmethod. The results show that the results of finite element simulations are in good agreement with that of the test. Thefailure modes of the columns under axial compression and lateral cyclic loads are compressed-flexural failure, with a goodenergy dissipation performance. The bearing capacity of the columns is enhanced with the increase of axial compressionratio, while deformation capacity deteriorates, when axial compression ratio exceeds the limit value, the bearing capacitydecreases because the stress state of the column changes to small eccentric compression. The bearing capacity can beenhanced by improving the strengths of the precast tube or core concrete, but it has a negative effect on the deformationcapacity of the columns. Increasing the volume ratio of transverse stirrups and decreasing the hollow ratio of the precast tubecan improve the deformation capacity of the columns, but when the hollow ratio is reduced to 20%, the effect can beneglected. The established restoring force model is in good agreement with the experimental results, which can accuratelysimulate the hysteretic behavior of this type of composite columns.

Keywords:concrete-filled centrifugal precast concrete tube column; seismic behavior; parameter analysis; restoring forcemodel; failure mode

∗国家自然科学基金资助项目(51578369),天津市科技计划资助项目(19YDLYSN00120).

第一作者:张锡治,博士,研究员,博士生导师,主要从事结构抗震和新型装配式结构体系研究,Email: zhang_xz@ tju. edu. cn.

[引用本文] 张锡治,张天鹤,章少华,等. 离心预制混凝土管组合柱抗震性能有限元分析与恢复力模型研究[ J].建筑结构, 2023, 53 ( 3): 52-63. ZHANG Xizhi, ZHANG Tianhe, ZHANG Shaohua, et al. Finite element analysis onseismic behavior and research on restoring force model of concrete-filled centrifugal precast concrete tube columns[ J].Building Structure,2023,53(3):52-63.