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(1 河南科技大學(xué)土木工程學(xué)院, 洛陽 471023; 2 洛陽理工學(xué)院土木工程學(xué)院河南新型土木工程結(jié)構(gòu)國際聯(lián)合實(shí)驗(yàn)室, 洛陽 471023; 3 武漢理工大學(xué)理學(xué)院, 武漢 430070)

摘要: 螺栓連接偏心支撐鋼框架可以實(shí)現(xiàn)工廠預(yù)制并現(xiàn)場安裝的施工模式,與傳統(tǒng)焊接偏心支撐相比,其震后替換耗能梁段更方便快捷. 為了研究震后替換耗能梁段對偏心支撐鋼框架抗震性能的影響,先對一個(gè)螺栓連接偏心支撐鋼框架進(jìn)行擬靜力循環(huán)加載,在第一次試驗(yàn)的基礎(chǔ)上,保持其他構(gòu)件不變,僅替換損壞的耗能梁段進(jìn)行再次試驗(yàn),并從滯回曲線、承載力、延性、耗能等方面分析了兩次試驗(yàn)的抗震性能差異. 研究結(jié)果表明:震后替換耗能梁段的模型的承載力、延性系數(shù)和耗能梁段轉(zhuǎn)動能力與原模型相比并無明顯差別,其耗能能力下降明顯. 由于螺栓滑移的影響,兩次試驗(yàn)的滯回曲線均呈“梭”形.

關(guān)鍵詞: 螺栓連接; 偏心支撐鋼框架; 替換耗能梁; 擬靜力試驗(yàn); 抗震性能

中圖分類號:TU391 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)05-0063-07

DOI:10. 19701 / j. jzjg. 20200869

Influence of post-earthquake replacement beam link with energy-dissipation on seismicperformance of eccentrically braced steel frame

LI Tong1, WANG Xinwu2, SHI Qiang2,3, BU Xin2, SUN Haisu2

(1 School of Civil Engineering, Henan University of Science & Technology, Luoyang 471023, China;2 Henan International Joint Laboratory of New Civil Engineering Structure, Luoyang Institute of Science and Technology,Luoyang 471023, China; 3 School of Science, Wuhan University of Science and Technology, Wuhan 430070,China)

Abstract: Bolted link of eccentrically braced steel frame can realize the construction mode of factory prefabrication and spotinstallation. Compared with traditional welding eccentrically braced steel frame, it is more conveniently and quickly toreplace link after earthquake. In order to study the influence of the post-earthquake replacement beam link withenergy-dissipation on seismic performance of eccentrically braced steel frame, the pseudo-static cyclic loading of a boltedlink eccentrically braced steel frame was carried out. On the basis of the first test, the other components were unchanged,only the damaged beam link with energy-dissipation was replaced to test again. The differences of seismic performancebetween the two tests were analyzed from hysteretic curve, bearing capacity, ductility and energy consumption. The resultsof research show that the bearing capacity, ductility and rotation capacity of the replacement beam link withenergy-dissipation after earthquake are not significantly different from the original model, but the energy-dissipating capacitydecreases significantly. Due to the effect of bolt slip, the hysteretic curves of both tests are in the shape of " shuttle" .

Keywords:bolted link; eccentrically braced steel frame; replacement beam link with energy-dissipation; pseudo-statictest; seismic performance

∗國家自然科學(xué)基金項(xiàng)目(51678284) ,河南省科技創(chuàng)新杰出人才項(xiàng)目(184200510016) .

第一作者:李通,碩士研究生,主要從事鋼結(jié)構(gòu)和組合結(jié)構(gòu)研究,Email:ligen2209@ 163. com.

[引用本文] 李通,王新武,時(shí)強(qiáng),等. 震后替換耗能梁段對偏心支撐鋼框架的抗震性能影響[ J] . 建筑結(jié)構(gòu),2022,52( 5 ) : 63-69. LI Tong, WANG Xinwu, SHI Qiang, et al. Influence of post-earthquake replacement beam link withenergy-dissipation on seismic performance of eccentrically braced steel frame[ J] . Building Structure,2022,52(5) :63-69.