外贴耗能空腹桁架和外贴BRB框架加固RC框架结构抗震性能对比分析
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摘要
针对RC框架结构常规抗震加固方法室内施工带来的种种弊端,借鉴日本"不入户加固"的设计和施工理念,基于框架结构中增设"整体型关键构件"的加固原理,本文提出一种新的外贴子结构-耗能空腹桁架,并与外贴含BRB框架加固方案进行抗震性能对比研究。利用SAP2000建立了2种加固方案结构模型,对加固结构及未加固结构进行时程反应分析和PUSHOVER分析,对比分析了层间位移角、层间剪力、层间位移集中系数及塑性铰分布等。研究结果表明:总的来说,2种加固方案的结构抗震性能基本相当,考虑到外贴空腹桁架方案在采光、美观等建筑功能方面的优势,加固方案选择时可优先考虑该方案。
A new attached external substructure(vierendeel trusses) used for seismic strengtheningof RC frame is proposed, to overcome shortcomings caused by the conventional seismic retrofit methods due to interior construction, using the design and construction concept of out-door retrofit in Japan for reference, and based on the retrofit principle of adding global key component to existing frame structures. Comparative study on the seismic performance of the retrofitted RC frame with the proposed method and the externally attached buckling-restrained brace frame is conducted through dynamic time history analysis and Pushover analysis using SAP2000 software, in terms of story drift, drift concentration factor, inter-story shear force and distribution of plastic hinge. The results show that RC frame retrofitted with anchoring vierendeel truss externally is slightly inferior to RC frame retrofitted with buckling-restrained brace frame in seismic performance. Attaching vierendeel truss externally can be used as a retrofit alternative, in consideration of its advantages in terms of natural lighting, aesthetics and other architectural features
A new attached external substructure(vierendeel trusses) used for seismic strengtheningof RC frame is proposed, to overcome shortcomings caused by the conventional seismic retrofit methods due to interior construction, using the design and construction concept of out-door retrofit in Japan for reference, and based on the retrofit principle of adding global key component to existing frame structures. Comparative study on the seismic performance of the retrofitted RC frame with the proposed method and the externally attached buckling-restrained brace frame is conducted through dynamic time history analysis and Pushover analysis using SAP2000 software, in terms of story drift, drift concentration factor, inter-story shear force and distribution of plastic hinge. The results show that RC frame retrofitted with anchoring vierendeel truss externally is slightly inferior to RC frame retrofitted with buckling-restrained brace frame in seismic performance. Attaching vierendeel truss externally can be used as a retrofit alternative, in consideration of its advantages in terms of natural lighting, aesthetics and other architectural features
引文
[1] 曲哲,张令心.日本钢筋混凝土结构抗震加固技术现状与发展趋势[J].地震工程与工程振动,2013,33(4):61-73Qu Zhe, Zhang Ling-xin. State of the art and development tendency of seismic retrofit for reinforced concrete structures in Japan[J]. Journal of Earthquake Engineering and Engineering Vibration, 2013,33(4):61-73(in Chinese)
[2] 叶列平, 程光煜, 陆新征,等. 论结构抗震的鲁棒性[J]. 建筑结构, 2008(6):11-15Ye Lie-ping, Cheng Guang-yu, Lu Xin-zheng, et al. Introduction of robustness for seismic structures[J]. Building Structure, 2008, 38(6): 11-15(in Chinese)
[3] JGJ 145-2015,混凝土结构后锚固技术规程[S]JGJ 145-2015, Technical specification for post-installed fastenings in concrete structures[S](in Chinese)
[4] GB 50367-2013,混凝土结构加固设计规范[S]GB 50367-2013, Code for design of strengthening concrete structure[S](in Chinese)
[5] 邓雪松, 张玉蕾, 张超,等. 消能立柱加固单跨框架结构原理与效果分析[J].土木工程学报, 2014(s1):169-178Deng Xue-song, Zhang Yu-lei, Zhang Chao, et al. Mechanism and effect analysis of single span frame structure retrofitted by using energy-dissipated columns[J]. China Civil Engineering Journal, 2014(47):18-24(in Chinese)
[6] 张家广. 防屈曲支撑加固钢筋混凝土框架抗震性能及设计方法[D]. 哈尔滨:哈尔滨工业大学, 2015Zhang Jia-guang. Seismic behavior and design method of reinforced concrete frames retrofitted with bucking-restrained braces [D]. Harbin:Harbin Institute of Technology, 2015(in Chinese)
[7] MacRae G A, Kimura Y, Roeder C. Effect of column stiffness on braced frame seismic behavior[J]. Journal of Structural Engineering, 2004, 130:895-903
[8] 曲哲.摇摆墙-框架结构抗震损伤机制控制及设计方法研究[D]. 北京:清华大学, 2010Qu Zhe. Study on seismic damage mechanism control and design of rocking wall-frame structures[D].Beijing:Tsinghua University, 2010(in Chinese)
[2] 叶列平, 程光煜, 陆新征,等. 论结构抗震的鲁棒性[J]. 建筑结构, 2008(6):11-15Ye Lie-ping, Cheng Guang-yu, Lu Xin-zheng, et al. Introduction of robustness for seismic structures[J]. Building Structure, 2008, 38(6): 11-15(in Chinese)
[3] JGJ 145-2015,混凝土结构后锚固技术规程[S]JGJ 145-2015, Technical specification for post-installed fastenings in concrete structures[S](in Chinese)
[4] GB 50367-2013,混凝土结构加固设计规范[S]GB 50367-2013, Code for design of strengthening concrete structure[S](in Chinese)
[5] 邓雪松, 张玉蕾, 张超,等. 消能立柱加固单跨框架结构原理与效果分析[J].土木工程学报, 2014(s1):169-178Deng Xue-song, Zhang Yu-lei, Zhang Chao, et al. Mechanism and effect analysis of single span frame structure retrofitted by using energy-dissipated columns[J]. China Civil Engineering Journal, 2014(47):18-24(in Chinese)
[6] 张家广. 防屈曲支撑加固钢筋混凝土框架抗震性能及设计方法[D]. 哈尔滨:哈尔滨工业大学, 2015Zhang Jia-guang. Seismic behavior and design method of reinforced concrete frames retrofitted with bucking-restrained braces [D]. Harbin:Harbin Institute of Technology, 2015(in Chinese)
[7] MacRae G A, Kimura Y, Roeder C. Effect of column stiffness on braced frame seismic behavior[J]. Journal of Structural Engineering, 2004, 130:895-903
[8] 曲哲.摇摆墙-框架结构抗震损伤机制控制及设计方法研究[D]. 北京:清华大学, 2010Qu Zhe. Study on seismic damage mechanism control and design of rocking wall-frame structures[D].Beijing:Tsinghua University, 2010(in Chinese)