防屈曲耗能支撑在铰接混凝土框架抗震加固中的应用
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摘要
在我国部分地区还存在有铰接混凝土框架结构,这种结构体系在设计时未进行抗震设计,如继续使用,应进行抗震加固以使其满足抗震要求。防屈曲耗能支撑克服了普通钢支撑失稳的缺点,具有明确的屈服位移和屈服力,在多遇地震下可保持弹性状态,为结构提供刚度和抗震承载力。在设防烈度地震和罕遇地震下,防屈曲耗能支撑将屈服耗能,从而为结构提供耗能能力。结合防屈曲耗能支撑的特点,提出在铰接混凝土框架结构中的抗震加固方法,并结合实际工程实例,研究加固后结构的耗能能力。
Hinge-connected concrete frames are still used in China.The frame is desighed without earthquake resistive consideration.It is necessary to conduct seismic retrofitting to this kind of structure.Buckling restrained braces were developed from steel brace and overcomed the weakness of unstablity of common steel timber. Buckling restrained brace has exact yield displacement and yield load.It can keep elastic under frequently occurred earthquake,and absorb earthquake energy under rare earthquakes.Based on the characteristic of the buckling restrained brace,the method of seismic retrofitting for a practical hinge-connected concrete frame was put forward.And the anargy disapation ability was studied after refrofitting based on this projeet.
Hinge-connected concrete frames are still used in China.The frame is desighed without earthquake resistive consideration.It is necessary to conduct seismic retrofitting to this kind of structure.Buckling restrained braces were developed from steel brace and overcomed the weakness of unstablity of common steel timber. Buckling restrained brace has exact yield displacement and yield load.It can keep elastic under frequently occurred earthquake,and absorb earthquake energy under rare earthquakes.Based on the characteristic of the buckling restrained brace,the method of seismic retrofitting for a practical hinge-connected concrete frame was put forward.And the anargy disapation ability was studied after refrofitting based on this projeet.
引文
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[2]谢强,赵亮.屈曲约束支撑的研究进展及其在结构抗震加固中的应用[J].地震工程与工程振动, 2006,26(3):100-103. Xie Qiang,Zhao Liang.Research on buckling-restrained brace and its applications to structural seismic retrofitting[J].Earthquake Engineering and Engineering Vibration,2006,26(3):100-103.(in Chinese)
[3]褚洪民,钱洪涛,邓雪松,等.应用屈曲约束支撑进行抗震加固的研究与应用[J].四川建筑科学研究,2007,33(S):13-20. Chu Hongmin,Qian Hongtao,Deng Xuesong,et al. The research and applications of using buckling-re- strained braces in the seismic rehabilitation[J].Sichuan Building Science,2007,33(S):13-20.(in Chinese)
[4]同济大学.TJ型屈曲约束支撑设计手册[M].3版.上海:同济大学,2011. Tongji University.Design manual of TJ buckling retrained braces[M].3r Edition.Shanghai;Tongji University, 2011.(in Chinese)
[5]胡大柱,李国强,孙飞飞,等.屈曲约束支撑铰接框架足尺模型模拟地震振动台试验[J].土木工程学报,2010,43(S):520-525. Hu Dazhu,Li Guoqiang,Sun Feifei,et al.Full-scale shaking table tests on a hinge-connected steel frame with buckling restrained braces[J].China Civil Engineering Journal,2010,43(S):520-525.(in Chinese )
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