| 引用本文: | 张漳荣,姜绍飞,戴亮亮.摇摆架加固装配框剪结构变形控制机理研究[J].哈尔滨工业大学学报,2021,53(4):120.DOI:10.11918/202008130 |
| ZHANG Zhangrong,JIANG Shaofei,DAI Liangliang.Study on deformation control mechanism of RC frame-prefabricated shear wall structure strengthened with external rocking frame[J].Journal of Harbin Institute of Technology,2021,53(4):120.DOI:10.11918/202008130 |
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| 摘要: |
| 为解决地震作用下非对称RC框架-装配式剪力墙结构（AFPSW）出现的层间位移集中和平面扭转等不利变形问题,提出外附摇摆架的加固方法提升AFPSW的损伤变形能力与抗震性能.推导了外附摇摆架加固体系的动力方程,揭示了其变形控制机理并据此建立相应的设计方法。为验证加固设计方法的有效性,建立了基于振动台试验验证的AFPSW有限元模型,结合非线性动力时程分析结果,研究了结构加固前后的变形模式、损伤状态的变化与性能提升效果。结果表明:在峰值加速度0.62 g地震作用下,加固后体系的层间位移集中系数和扭转分别减小了20.9%和53%,极大改善了结构的不利变形,降低了体系整体损伤状态等级。这一切表明外附摇摆架加固体系的动力方程推导正确,提出的结构加固设计方法是可靠的,极大地改善了结构的均匀性和抗震性能。 |
| 关键词: 外附摇摆架 装配混凝土结构 动力时程分析 层间位移集中系数 变形模式 |
| DOI：10.11918/202008130 |
| 分类号:TU375.4; TU352.11 |
| 文献标识码:A |
| 基金项目:国家十三重点专项课题(SQ2020YFD110006-03)；福建省科技厅项目(2017Y4012) |
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| Study on deformation control mechanism of RC frame-prefabricated shear wall structure strengthened with external rocking frame |
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ZHANG Zhangrong,JIANG Shaofei,DAI Liangliang
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(College of Civil Engineering, Fuzhou University, Fuzhou 350108, China)
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| Abstract: |
| To solve the unfavorable deformation problems of asymmetric RC frame-prefabricated shear wall (AFPSW) structures under earthquake excitation, such as inter-story drift concentration and plane torsion, a seismic strengthening method of attaching external rocking frame was proposed to improve the seismic performance and damage deformation capacity of the AFPSW structure. The dynamic equation of the structural system was derived, the deformation control mechanism was revealed, and the corresponding design method was put forward for rocking frame. To verify the proposed method, the AFPSW finite element model was established and verified based on shaking table test. On the basis of the model, nonlinear dynamic time-history analysis was conducted, and the deformation modes, damage states, and performance improvement of the AFPSW structure with and without reinforcement were investigated. Results show that the drift concentration factor NDCF and torsion of the strengthened structure were reduced by 20.9% and 53% respectively under peak ground acceleration of 0.62 g, which greatly improved the unfavorable deformation of the structure and reduced the damage level of the system.It indicates that the dynamic equation of the structure was correctly deduced, and the proposed reinforcement design method is effective, which can remarkably improve structural uniformity and seismic performance. |
| Key words: external rocking frame prefabricated concrete structure dynamic time-history analysis drift concentration factor deformation mode |
