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（中南建筑設(shè)計(jì)院股份有限公司， 武漢 430071）
［摘要］華電集團(tuán)華中總部基地主樓的兩個(gè)塔樓在頂部8層（47～54層）連為一體，為“門”形復(fù)雜連體超限高層建筑。結(jié)構(gòu)存在樓板不連續(xù)、剛度和承載力突變、構(gòu)件間斷、局部不規(guī)則等5項(xiàng)不規(guī)則項(xiàng)。對主樓進(jìn)行了抗震性能分析，確定了結(jié)構(gòu)構(gòu)件抗震性能目標(biāo)。對主樓進(jìn)行了小震靜力彈性和彈性時(shí)程分析、中震和大震等效彈性分析及大震彈塑性時(shí)程分析，重點(diǎn)對比了單塔模型與整體模型統(tǒng)計(jì)的力學(xué)和變形指標(biāo)的差異、加強(qiáng)層及連體桁架屈服情況，驗(yàn)算了墻肢受力狀態(tài)，并根據(jù)分析結(jié)果采取相應(yīng)的抗震措施，抗震性能達(dá)到預(yù)期的性能目標(biāo)C類要求。最后針對地下室頂板開大洞、連體層樓板受力性能、結(jié)構(gòu)抗連續(xù)倒塌等做了專門的計(jì)算分析與構(gòu)造設(shè)計(jì)，結(jié)果滿足要求。
［關(guān)鍵詞］超限高層； 連體結(jié)構(gòu)； 抗震性能設(shè)計(jì)； 彈塑性時(shí)程分析； 連續(xù)倒塌分析
中圖分類號：TU398-7文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)08-0064-07
Performance-based seismic design of main buildings of Central China Headquarters of Huadian Group
CHEN Xiaoqiang, LI Ting, LI Hongsheng, ZHANG Shen, WANG Xiaonan, CHEN Yuankun, CHEN Yanzhou, WANG Jie
(Central-South Architectural Design Institute Co., Ltd., Wuhan 430071, China)
Abstract:The two towers in the main buildings of Central China Headquarters of Huadian Group are connected as a whole on the top 8 floors (47～54 floors), which is a “door”-shaped complex connected out-of-code high-rise building. There are five irregular items in the structure, such as floor discontinuity, abrupt change of stiffness and bearing capacity, discontinuity of members, and local irregularity. The seismic performance of the main building was analyzed, and the seismic performance targets of structural members were determined. The static elastic and elastic time-history analysis under frequent earthquakes, equivalent elastic analysis under fortification earthquakes and rare earthquakes, and elastic-plastic time-history analysis under rare earthquakes were carried out for the main building. The difference of mechanics and deformation indexes between the single tower model and the overall model was emphatically compared and the yielding situation of the strengthened story and the connected truss were emphatically compared, and the mechanical state of the walls was checked, and the corresponding seismic measures were taken according to the analysis results. The seismic performance met the expected performance target class C requirements. Finally, the special calculation analysis and structural design were made for the large opening of the basement roof, the mechanical performance of the connected floor slab, and the resistance of the structure to progressive collapse, and the results met the code requirements.
Keywords:out-of-code high-rise building; connected structure; performance-based seismic design; elastic-plastic time-history analysis; progressive collapse analysis
作者簡介：陳曉強(qiáng)，博士，高級工程師，Email:17374932@qq.com。
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