钢管混凝土斜交网格筒结构地震能量反应分析

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摘要结合所建立的钢管混凝土柱的轴向恢复力模型对斜交网格筒结构进行了弹塑性时程分析，研究了结构中各能量项的分配规律，从结构-构件-楼层三个层面，依次分析了滞回耗能的分配规律，并探讨了结构动力特性和地震动参数对滞回耗能分布的影响。研究表明：结构主要依靠阻尼耗能和滞回耗能平衡地震输入的能量；斜柱和连梁是斜交网格筒结构的主要耗能构件；斜柱的滞回耗能随楼层增高递减且在模块相接处有明显突变，设计时此处应避免出现较大的刚度突变。研究从能量的角度揭示了斜交网格筒结构的损伤模式和耗能机制，为建立此类结构的地震损伤评估方法提供了参考。

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	蔡文哲1
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	王斌2
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	史庆轩2
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	葛明兰1

关键词 ：钢管混凝土柱, 轴向恢复力模型, 斜交网格筒结构, 弹塑性时程分析, 耗能机制

Abstract：Combined with the established axial restoring force model of the concrete-filled steel tube (CFST) column, the elastoplastic time-history analysis of the diagrid tube structure was carried out, and the distribution law of each energy item in the structure was studied. The distribution of hysteretic energy dissipation was analyzed in turn from the three levels of structure-member-floor, and the influence of structural dynamic characteristics and ground motion parameters on the distribution of hysteretic energy dissipation was discussed. The research shows that the structure mainly balances the earthquake input energy through damping energy dissipation and hysteretic energy dissipation. The main energy dissipation components of diagrid tube structure are inclined column and coupling beam. The hysteretic energy dissipation of the inclined column decreases with the increase of the floor and there is an obvious sudden change at the junction of the modules, so the large sudden stiffness change should be avoided in the design. The study reveals the damage mode and energy dissipation mechanism of diagrid tube structure from the perspective of energy, which provides a reference for establishing the seismic damage assessment method of the diagrid structure.

Key words： the concrete-filled steel tube column axial restoring force model diagrid tube structure elastoplastic time-history energy dissipation mechanism

收稿日期: 2022-08-07 出版日期: 2023-07-28

引用本文:

蔡文哲1,2，王斌2,3，史庆轩2,3，葛明兰1. 钢管混凝土斜交网格筒结构地震能量反应分析[J]. 振动与冲击, 2023, 42(14): 92-106.
CAI Wenzhe1,2，WANG Bin2,3，SHI Qingxuan2,3，GE Minglan1. Seismic energy response analysis of a concrete-filled steel tube diagrid structure. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(14): 92-106.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I14/92

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