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(1 東南大學(xué)建筑設(shè)計研究院有限公司, 南京 210096; 2 東南大學(xué)土木工程學(xué)院, 南京 210096)
摘要: 河海大學(xué)新校區(qū)圖書館外立面下部為一圈波浪形轉(zhuǎn)換斜柱,上部為普通框架,整體結(jié)構(gòu)下剛上柔,屬于規(guī)則性超限高層建筑. 采用 RC 框-剪結(jié)構(gòu)時,小震、中震彈性計算所得結(jié)構(gòu)各項指標(biāo)均可滿足規(guī)范要求,但大震彈塑性時程分析結(jié)果顯示,樓板和剪力墻均出現(xiàn)了重度損傷. 通過研究抗側(cè)力構(gòu)件各樓層剪力變化,發(fā)現(xiàn)剛度突變導(dǎo)致上部樓層水平地震作用放大,剪力墻地震作用通過樓板向轉(zhuǎn)換斜柱轉(zhuǎn)移,是導(dǎo)致結(jié)構(gòu)重度損傷的主要原因. 通過對比分析,最終采用外立面為 SRC 斜柱-BRB 組合轉(zhuǎn)換結(jié)構(gòu),內(nèi)部為 RC 框架-BRB 支撐結(jié)構(gòu)的混合結(jié)構(gòu)方案,所選結(jié)構(gòu)與 RC 框-剪結(jié)構(gòu)相比,中震彈性分析時,薄弱部位的樓板剪力減小約 25%,大震彈塑性時程分析時,由于BRB 屈服耗能,薄弱部位樓板剪力減小約 66%,整體結(jié)構(gòu)僅發(fā)生輕度損傷. 按超限高層建筑性能設(shè)計的要求,對結(jié)構(gòu)進(jìn)行各地震作用水準(zhǔn)下的受力分析,結(jié)果表明,該結(jié)構(gòu)抗震性能良好.
關(guān)鍵詞: 斜柱; 轉(zhuǎn)換結(jié)構(gòu); 屈曲約束支撐; 減震; 規(guī)則性超限高層建筑
中圖分類號:TU398 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2023)04-0120-08
DOI:10. 19701 / j. jzjg. LS210229
Seismic design of SRC inclined column-BRB composite transfer structure in new campus library of Hohai University
HAN Chongqing1, CUI Shaoxian2, WANG Guocheng1, SUN Chunli1, SUN Xun1
(1 Architects & Engineers Co. , Ltd. of Southeast University, Nanjing 210096, China;2 School of Civil Engineering, Southeast University, Nanjing 210096, China)
Abstract:The new campus library of Hohai University is a regular over-limit high-rise building with a wave-shapedconversion inclined column under the facade and a common frame in the upper. The lower part of its overall structure isrigid, and the upper part is flexible. When RC frame-shear wall structure was used, the elastic calculation indexes offrequent earthquake and moderate earthquake could meet the requirements of the code, but the elastic-plastic time-historyanalysis results of rare earthquake show that the floor and shear wall have severe damage. By studying the change of storyshear force of lateral load resisting members on each floor, it is found that the stiffness mutation leads to the amplification ofthe horizontal seismic action of the upper floor, and the seismic action of the shear wall transfers through floor to inclinedcolumn, which is the main reason for the severe damage of the structure. Though comparative analysis, the final solutionadopts a hybrid structure scheme with SRC inclined column-BRB composite transfer structure on the outside, and RC frameBRB support structure on the inside. Compared with the RC frame-shear structure, the floor shear of weak parts is reducedby about 25% in the elastic analysis of moderate earthquake. In the elastic-plastic time-history analysis of rare earthquake,the floor share of weak parts is reduced by about 66% and the overall structure was only slightly damaged due to yieldingenergy dissipation of BRB. According to the requirements of performance design of over-limit high-rise building, the stressanalysis of the structure under various seismic action levels was carried out. The results show that the structure has goodseismic performance.
Keywords:inclined column; transfer structure; buckling restrained brace; damping; regular over-limit high-rise building
第一作者:韓重慶,博士,一級注冊結(jié)構(gòu)師,研究員級高級工程師,主要從事復(fù)雜結(jié)構(gòu)設(shè)計、結(jié)構(gòu)抗火、預(yù)應(yīng)力空間結(jié)構(gòu)等方面的研究,Email:chq_han@ seu. edu. cn.
[引用本文] 韓重慶,崔紹賢,王國承,等. 河海大學(xué)新校區(qū)圖書館 SRC 斜柱-BRB 組合轉(zhuǎn)換結(jié)構(gòu)抗震設(shè)計[ J]. 建筑結(jié)構(gòu),2023,53(4):120-127. HAN Chongqing,CUI Shaoxian,WANG Guocheng,et al. Seismic design of SRC inclinedcolumn-BRB composite transfer structure in new campus library of Hohai University[J]. Building Structure,2023,53(4):120-127.
