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(1 國核電力規(guī)劃設(shè)計研究院有限公司, 北京 100095; 2 河北科技大學(xué)建筑工程學(xué)院, 石家莊 050018)
摘要: 提出了一種新型剪切型耗能梁 K 形偏心支撐鋼框架(耗能梁與框架梁不等截面,Q2 模型),為驗證其抗震性能并與傳統(tǒng)的剪切型耗能梁 K 形偏心支撐鋼框架(耗能梁與框架梁等截面,Q1 模型)對比,對兩個 1 ∶2. 6 縮尺的單榀、單跨、單層框架模型進行了擬靜力試驗。 結(jié)果表明,兩個模型的塑性變形基本集中于耗能梁段上,試驗結(jié)束時兩個模型的承載力均未出現(xiàn)下降;Q2 模型的承載力、初始剛度比 Q1 模型低,在相同位移下,耗能能力也小于后者,但 Q2 模型耗能梁段的轉(zhuǎn)動能力及結(jié)構(gòu)整體延性好于 Q1 模型,且 Q2 模型的用鋼量較后者減少 11. 5%。 為研究耗能梁長度對兩種類型結(jié)構(gòu)抗震性能的影響,采用有限元軟件 ABAQUS 建立 8 個數(shù)值模型并對其進行了非線性滯回性能分析,分析了滯回曲線、承載力、剛度及耗能能力隨耗能梁長度的變化規(guī)律,最后給出了關(guān)于耗能梁長度的設(shè)計建議。
關(guān)鍵詞: 鋼框架結(jié)構(gòu); 剪切型耗能梁; 截面削弱; 耗能梁長度; 擬靜力試驗; 抗震性能
中圖分類號:TU391 文獻標(biāo)志碼:A 文章編號:1002-848X(2022)24-0050-07
DOI:10. 19701 / j. jzjg. 20200451
Study on seismic behavior of K-shaped eccentrically braced steel frame structures with shear links
CHEN Shixi1, WU Yangzhou2, YU Haifeng2, MA Kang2, WANG Yan2,ZHANG Weisong1, HUANG Youqiang1
(1 State Nuclear Electric Power Planning Design & Research Institute Co. , Ltd. , Beijing 100095, China;2 School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China)
Abstract: A new K-shaped eccentrically braced steel frame with shear links ( abbreviated as Q2 model, which has theunequal cross-section for the beam and link) was proposed. To verify its seismic performance and compare it with thetraditional K-shaped eccentrically braced steel frame with shear links(abbreviated as Q1 model, which has the same crosssection for the beam and link). The quasi-static tests of two single layer, single span and single layer models with 1:2. 6scale were conducted. The results show that, for the two models, the plastic deformation basely concentrated in the shearlinks, and the bearing capacity did not decrease when the tests stopped. The bearing capacity, initial stiffness and energyconsumption capacity of the Q2 model were all less than the Q1 model, but the rotational capacity of the link and thestructure overall ductility were better than Q1 model, and the steel used in the Q2 model is 11. 5% less than that in the Q1model. To study the influence of link length on the seismic performance of Q1 and Q2 model, eight numerical models wereestablished using ABAQUS finite sotware, and nonlinear hysteretic analysis were performed. By analyzing the change law ofhysteresis curve, bearing capacity, stiffness and energy consumption capacity with the links, the corresponding designrecommendations were suggested.
Keywords:steel frame structure; shear link; reduction of cross-section; link length; quasi-static test; seismic performance
∗國家自然科學(xué)基金(51208169),河北科技大學(xué)研究生創(chuàng)新資助項目(2020)。
第一作者:陳世璽,碩士,高級工程師,主要從事結(jié)構(gòu)設(shè)計相關(guān)工作,Email: u3118@ snpdri. com。
[引用本文]陳世璽,吳楊周,于海豐,等. 剪切型耗能梁 K 形偏心支撐鋼框架結(jié)構(gòu)抗震性能研究[ J]. 建筑結(jié)構(gòu),2022,52( 24): 50-56, 76. CHEN Shixi, WU Yangzhou, YU Haifeng, et al. Study on seismic behavior of K-shapedeccentrically braced steel frame structures with shear links [J]. Building Structure,2022,52(24):50-56,76.
