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外附耗能搖擺鋼框架結(jié)構(gòu)抗震性能試驗(yàn)研究
沈金生, 劉利偉, 賈少卓, 彭寧寧, 聶千朋
摘 要

(河北工程大學(xué)土木工程學(xué)院, 邯鄲 056038)

摘要: 提出了一種新型減振搖擺結(jié)構(gòu)體系,通過在外附搖擺鋼框架與原框架連接節(jié)點(diǎn)處設(shè)置阻尼器,形成外附耗能搖擺鋼框架結(jié)構(gòu)。 設(shè)計(jì)制作了外附耗能搖擺鋼框架結(jié)構(gòu)縮尺模型,并對(duì)其進(jìn)行了振動(dòng)臺(tái)模擬試驗(yàn)。 通過分析結(jié)構(gòu)在不同工況下的動(dòng)力特性、加速度、位移響應(yīng),得到了結(jié)構(gòu)的最大樓層加速度和層間位移減震效果以及阻尼器的耗能情況。 結(jié)果表明:外附耗能搖擺鋼框架結(jié)構(gòu)多節(jié)點(diǎn)耗能有效減輕了結(jié)構(gòu)的地震響應(yīng),加速度均方根減震系數(shù)最高達(dá)到 49?? 6%,最大層間位移減震系數(shù)達(dá)到 68%,避免了層間變形集中,使層間變形趨于均勻,提高了框架結(jié)構(gòu)的耗能能力。 外附耗能搖擺鋼框架結(jié)構(gòu)能夠有效減輕震害,具有可更換、方便施工的特點(diǎn),在建筑物的抗震加固中有著良好的應(yīng)用前景。

關(guān)鍵詞: 外附搖擺鋼框架; 消能減震; 抗震性能; 振動(dòng)臺(tái)試驗(yàn)

中圖分類號(hào):TU375?? 4 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002?848X(2022)14?0092?06

 

DOI:10?? 19701 / j?? jzjg?? 20200775

 

Experimental study on seismic performance of external energy dissipative swing steel frame structure

SHEN Jinsheng,LIU Liwei, JIA Shaozhuo, PENG Ningning, NIE Qianpeng

(College of Civil Engineering, Hebei University of Engineering, Handan 056038, China)

Abstract:A new type of vibration?reducing and rocking structure system was proposed. By setting dampers at theconnection joints between the external energy dissipative swing steel frame and the original frame, the external energydissipative swing steel frame structure was formed. A scaled model of the external energy dissipative swing steel framestructure was designed and manufactured, and a shaking table simulation test was carried out on it. By analyzing thedynamic characteristics, acceleration and displacement response of the structure under different working conditions, themaximum floor acceleration and inter?story displacement shock absorption effect of the structure and the energy consumptionof the damper were obtained. The results show that the multi?joint energy dissipation of the external energy dissipative swingsteel frame structure effectively reduces the seismic response of the structure. The acceleration RMS shock absorptioncoefficient reaches 49?? 6%, the maximum interlayer displacement shock absorption coefficient reaches 68%. The interlayerdeformation concentration is avoided, the interlayer deformation tends to be uniform, and the energy dissipation capacity ofthe frame structure is improved. The external energy dissipative swing steel frame structure can effectively reduceearthquake damage and has the characteristics of replaceable and convenient construction, and has a good applicationprospect in seismic reinforcement of buildings.

Keywords:external swing steel frame; energy dissipation; seismic performance; vibration table test

∗國家自然科學(xué)基金項(xiàng)目(51378169),河北省自然科學(xué)基金項(xiàng)目(E2019402183)。
第一作者:沈金生,博士,講師,碩士生導(dǎo)師,主要從事混凝土結(jié)構(gòu)與抗震研究,Email: 57399505@ qq. com。
通信作者:劉利偉,碩士,主要從事混凝土結(jié)構(gòu)與抗震研究,Email: 980704914@ qq. com。
 
[引用本文] 沈金生,劉利偉,賈少卓,等. 外附耗能搖擺鋼框架結(jié)構(gòu)抗震性能試驗(yàn)研究[ J]. 建筑結(jié)構(gòu),2022,52(14):92?97. SHEN Jinsheng ,LIU Liwei,JIA Shaozhuo,et al. Experimental study on seismic performance of externalenergy dissipative swing steel frame structure[J]. Building Structure,2022,52(14):92?97.
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