外部附加带框钢支撑加固框架结构抗震性能试验研究
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摘要
对外部附加带框钢支撑加固的框架结构进行低周反复荷载试验,研究其开裂及破坏状态、滞回曲线、骨架曲线、刚度退化、抗震耗能系数曲线等并与纯框架结构试验结果对比,得到结论如下:外部附加带框钢支撑强连接加固法提高混凝土框架结构抗震承载能力3. 62倍,初始刚度提高系数为2. 6,同时能够有效限制结构的层间位移,钢支撑作为第一道抗震防线,增加了结构的抗震冗余度,是一种非常好的抗震加固方法。
The low-cyclic reversed loading test of frame structure strengthened by steel frame-braces is carried out. The cracking and failure patterns,hysteretic curves,skeleton curves,stiffness degradation curve,energy dissipation coefficient are analyzed,and compared with the results of frame structure test. The results show that: comparing with pure frame structure,aseismic bearing capacity of frame wih attached steel braces can be increased by 3. 62 times,the initial stiffness improvement coefficient is 2. 6,and the interlayer displacement can be restricted effectively. As the first anti-seismic line,steel braces increase the seismic redundancy of the structure.
The low-cyclic reversed loading test of frame structure strengthened by steel frame-braces is carried out. The cracking and failure patterns,hysteretic curves,skeleton curves,stiffness degradation curve,energy dissipation coefficient are analyzed,and compared with the results of frame structure test. The results show that: comparing with pure frame structure,aseismic bearing capacity of frame wih attached steel braces can be increased by 3. 62 times,the initial stiffness improvement coefficient is 2. 6,and the interlayer displacement can be restricted effectively. As the first anti-seismic line,steel braces increase the seismic redundancy of the structure.
引文
[1]曲哲,叶列平.附加子结构抗震加固方法及其在日本的应用[J].建筑结构,2010,40(5):55-58Qu Zhe,Ye Lie-ping. Seismic retrofit with attached substructures and its application in Japan[J]. Building Structure,2010,40(5):55-58(in Chinese)
[2]尹保江,吉飞宇,程绍革,等.基于模型试验的既有框架结构抗震性能研究[J]工程抗震与加固改造,2018,40(6):39-44Yin Bao-jiang,Ji Fei-yu,Cheng Shao-ge,et al.Experimental-based study on seismic performance of existing frame structure[J]. Earthquake Resistant Engineering and Retrofitting,2018,40(6):39-44(in Chinese)
[3]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007Wang Xin-min. Numerical analysis of ANSYS engineering structure[M]. Beijing:The People's Communication Publishing Company,2007(in Chinese)
[4]罗如登. Ansys中砼单元Solid65的裂缝间剪力传递系数取值[J].江苏大学学报(自然科学版),2008,(2):169-172Luo Ru-deng. Value of shear transfer coefficients of concrete element solid65 in ansys[J]. Journal of Jiangsu University(Natural Science Edition),2008,(2):169-172(in Chinese)
[5] JGJ/T101—2015,建筑抗震试验规程[S].JGJ/T101—2015, Specification for Seismic Test of Buildings[S](in Chinese)
[2]尹保江,吉飞宇,程绍革,等.基于模型试验的既有框架结构抗震性能研究[J]工程抗震与加固改造,2018,40(6):39-44Yin Bao-jiang,Ji Fei-yu,Cheng Shao-ge,et al.Experimental-based study on seismic performance of existing frame structure[J]. Earthquake Resistant Engineering and Retrofitting,2018,40(6):39-44(in Chinese)
[3]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007Wang Xin-min. Numerical analysis of ANSYS engineering structure[M]. Beijing:The People's Communication Publishing Company,2007(in Chinese)
[4]罗如登. Ansys中砼单元Solid65的裂缝间剪力传递系数取值[J].江苏大学学报(自然科学版),2008,(2):169-172Luo Ru-deng. Value of shear transfer coefficients of concrete element solid65 in ansys[J]. Journal of Jiangsu University(Natural Science Edition),2008,(2):169-172(in Chinese)
[5] JGJ/T101—2015,建筑抗震试验规程[S].JGJ/T101—2015, Specification for Seismic Test of Buildings[S](in Chinese)