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 re- strained braces were developed from steel brace and overcomed the weakness of unstablity of common steel tim- ber. Buckling restrained brace has exact yield displacement and yield load. It can keep elastic under frequent- ly 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 project.
出处
《结构工程师》
北大核心
2012年第3期147-151,共5页
Structural Engineers
关键词
防屈曲耗能支撑
铰接框架
抗震加固
耗能
buckling restrained brace, hinge-connected concrete frame, seismic retrofitting, energy dissipa- tion
