损伤方钢管混凝土框架加固后的抗震性能
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摘要
为了保证加固框架在抗震区应用的安全性,采用加强节点,梁端削弱的方法对震后钢管混凝土框架进行加固,为考察加固后的框架是否满足延性框架的要求,通过拟静力试验,对比分析了损伤加固框架和原框架的抗震性能．研究表明,损伤加固后的方钢管混凝土框架不仅承载能力有了大幅度的提高,并且延性系数好,满足延性框架的要求,耗能能力接近原框架,说明加固效果显著．
The damaged concrete-filled rectangular tubular frame was reinforced by strengthening joints and weakening beams to improve ductility and sturdiness．To investigate the strengthening effect and ensure the safety of application in the earthquake area,the seismic behavior of the reinforced damaged frame Was compared with that of the undamaged one through pseudo static test．The results show that the bearing capacity of rein- forced frame is obviously enhanced,the ductility coefficient is high and meets the requirement of the ductile frame,and its energy dissipation capability is similar to that of the undamaged one．Therefore,the strengthening effect iS significant．
The damaged concrete-filled rectangular tubular frame was reinforced by strengthening joints and weakening beams to improve ductility and sturdiness．To investigate the strengthening effect and ensure the safety of application in the earthquake area,the seismic behavior of the reinforced damaged frame Was compared with that of the undamaged one through pseudo static test．The results show that the bearing capacity of rein- forced frame is obviously enhanced,the ductility coefficient is high and meets the requirement of the ductile frame,and its energy dissipation capability is similar to that of the undamaged one．Therefore,the strengthening effect iS significant．
引文
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[3] Aval S B B,Saadeghvaziri M A, Golgshani A A. Compre-hensive composite inelastic fiber element for cyclic analysis of concrete-filled steel tube columns [ J ]. Journal of Engi- neering Mechanics,ASCE,2002,128(4) :428-437.
[4] Lu Xilin, Yu Yong. Experimental study on the seismic be- havior in the connection between CFRT column and steel beam [ J ]. Structural Engineering and Mechanics, 2000, 9 (4) :365-374.
[5] Elremaily A.Azizinamini A. Behavior and strength of circular concrete-filled tube columns [ J ]. Journal of Constructional Steel Research,2002, 58(7): 1567-1591.
[6] Claudio Bernuzzi, Ricardo Zandonini. Failure assessment of beam-to-column steel joints via low-cycle fatigue approaches [C] //Proceedings of the Second International Conference on Advances in Steel Structures. Hong Kong, 1999:991-998.
[7] Oh Y S, Shin K J, Moon T S. Test of concrete-filled box column of H-beam connections [C ] //Proceedings of the Fifth Pacific Structural Steel Conference. Seoul, Korea, 1998:881- 886.
[8] Ichinohe Y, Matsutani T, NakajimaM, et al. Elasto-plastic behavior of concrete filled steel circular columns[ C] //Pro- ceeding of the Third International Conference on Steel-Con- crete Composite Structure. Fukuoka, Japan, 1991 :131-136.
[9]杨尉彪,高小旺,张维岳,等．高层建筑钢结构梁柱节点试验研究[J]．建筑结构,2001,31(8):3-8．Yang Weibiao,Gao Xiaowang, Zhang Weiyue, et al. Experi- mental study on moment connections of tall steel structure [J]. Building Structure,2001,31(8) :3-8( in Chinese).
[10] JGJl01-96建筑抗震试验方法规程[S]．1996．JGJ101-96 Specification of Testing Methods for Earthquake Resistant Building[S]. 1996(in Chinese).
[11]李忠献．工程结构试验理论与技术[M]．天津:天津大学出版社,2004．Li Zhongxian. Theory and Technique of Engineering Structure Experiments [ M ]. Tianjin: Tianjin University Press, 2004 (in Chinese).
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