發(fā)布時(shí)間：2018-01-23 02:45

  本文關(guān)鍵詞： 防屈曲支撐 附加阻尼比 消能減震 自由振動(dòng)衰減 雙線性模型　出處：《振動(dòng)與沖擊》2016年02期 　論文類型：期刊論文

【摘要】：基于《建筑消能減震技術(shù)規(guī)程》(JGJ 279-2013)的附加有效阻尼比計(jì)算方法,推導(dǎo)防屈曲支撐(Buckling-Restrained Brace,BRB)減震結(jié)構(gòu)等效單自由度體系的附加有效阻尼比計(jì)算式,分析主體結(jié)構(gòu)處于不同工作階段附加有效阻尼比變化規(guī)律,并用自由振動(dòng)衰減法驗(yàn)證其變化規(guī)律的正確性。結(jié)果表明,主體結(jié)構(gòu)彈性時(shí),附加有效阻尼比隨結(jié)構(gòu)變形增加先增大后減小;主體結(jié)構(gòu)塑性時(shí),BRB附加給結(jié)構(gòu)的有效阻尼比與結(jié)構(gòu)屈服后剛度有關(guān)。討論阻尼器型BRB(記為第Ⅲ類)設(shè)計(jì)原則,并分析結(jié)構(gòu)第一階段抗震設(shè)計(jì)時(shí)附加有效阻尼比的取值原則。
[Abstract]:An additional effective damping ratio calculation method based on "Technical Specification for Energy dissipation and damping of buildings" (JGJ279-2013). The additional effective damping ratio of buckling-Restrained BRBs for equivalent single-degree-of-freedom systems of anti-buckling bracing structures is derived. The variation law of the additional effective damping ratio of the main structure at different working stages is analyzed, and the correctness of the variation law is verified by the free vibration attenuation method. The results show that the main structure is elastic. The additional effective damping ratio increases first and then decreases with the increase of structural deformation. The effective damping ratio attached to the structure by BRB when the main structure is plastic is related to the post-yield stiffness of the structure. The design principle of damper type BRBs (referred to as Class 鈪，

本文編號(hào)：1456475