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(1 湖南省建筑設(shè)計(jì)院集團(tuán)股份有限公司, 長沙 410012; 2 中建研科技股份有限公司, 北京 100013)
摘要: 屈曲約束支撐(BRB)在地震作用下可以率先吸收能量,提前進(jìn)入屈服,在結(jié)構(gòu)剛度不變的情況下,成為高耗能的結(jié)構(gòu)構(gòu)件。 以一個(gè)超限高層項(xiàng)目為例,介紹了超大噸位 BRB 在伸臂桁架中的應(yīng)用。 開展了單根屈曲約束支撐 1 ∶2縮尺模型的擬靜力試驗(yàn),并通過 ABAQUS 進(jìn)行動(dòng)力彈塑性分析。 分析結(jié)果表明:BRB 滯回曲線飽滿、穩(wěn)定和剛度增量為正,在罕遇地震作用下,其最大內(nèi)力及變形均滿足設(shè)計(jì)要求;同時(shí)與之相鄰的豎向混凝土關(guān)鍵構(gòu)件,在 1. 5 倍控制荷載作用下,很少量混凝土發(fā)生損傷;與之相鄰的鋼結(jié)構(gòu)構(gòu)件,在 1. 35 倍控制荷載作用下,僅部分框架梁腹板達(dá)到了屈服,而其他鋼結(jié)構(gòu)構(gòu)件及節(jié)點(diǎn)均未屈服。
關(guān)鍵詞: 屈曲約束支撐; 超大噸位; 超限高層結(jié)構(gòu); 伸臂桁架; 動(dòng)力彈塑性分析; 節(jié)點(diǎn)有限元分析
中圖分類號(hào):TU318+. 1 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)22-0101-07
DOI:10. 19701 / j. jzjg. ZJ220078
Application of buckling restrained brace with super large tonnage in over-code high-rise structure with cantilever truss
XIA Xinhong1, YUAN Tao1, WANG Siqing1, YANG Xiao1,PENG Aiping1, GONG Lingli1, BU Dan1, WU Zhenhong2
(1 Hunan Architectural Design Institute Group Co. , Ltd. , Changsha 410012, China;2 CABR Technology Co. , Ltd. , Beijing 100013, China)
Abstract: Buckling restrained brace (BRB) can absorb energy first and yield ahead in advance under earthquake action,and become a structural member with high energy consumption when the structural stiffness remains unchanged. Taking anout of over-code high-rise project as an example, the application of super large tonnage BRB in cantilever truss wasintroduced. The pseudo static test of a 1 ∶ 2 scale model of a single buckling restrained brace was carried out, and thedynamic elastoplastic analysis was carried out by ABAQUS. The analysis results show that the BRB hysteretic curve is fulland stable, the stiffness increment are positive, and the maximum internal force and deformation meet the designrequirements under the action of rare earthquakes. At same time, the adjacent key vertical concrete members, under theaction of 1. 5 times of the control load, a small amount of concrete is damaged. The adjacent steel structure members,under 1. 35 times of the control load, only part of the frame beam webs reached the yield, while other steel structuremembers and joints did not yield.
Keywords:buckling restrained brace; super large tonnage; over-code high-rise structure; dynamic elastoplastic analysis;node finite analysis
∗國家自然科學(xué)基金項(xiàng)目(52278509)。
第一作者:夏心紅,博士,正高級(jí)工程師,主要從事大跨復(fù)雜空間結(jié)構(gòu)設(shè)計(jì)研究與設(shè)計(jì)管理工作,Email:452393091@ qq. com。
[引用本文] 夏心紅,袁濤,王四清,等. 超大噸位屈曲約束支撐在超限高層伸臂桁架中的應(yīng)用研究[ J]. 建筑結(jié)構(gòu),2022,52(22):101-107. XIA Xinhong,YUAN Tao,WANG Siqing,et al. Application of buckling restrained brace withsuper large tonnage in over-code high-rise structure with cantilever truss[J]. Building Structure,2022,52(22):101-107.
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