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（北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045）
［摘要］清華大學(xué)經(jīng)管學(xué)院擴(kuò)建及三創(chuàng)中心工程結(jié)構(gòu)平面呈L形，兩方向邊長為134，116m，未設(shè)永久縫，采用鋼筋混凝土框架-剪力墻結(jié)構(gòu)體系。地上分為A，B塔，L形拐角處設(shè)置一根鋼管混凝土獨(dú)柱支承三層鋼結(jié)構(gòu)過街樓連接體，連接體最大跨度38-40m，最大懸挑長度17-4m。結(jié)構(gòu)存在扭轉(zhuǎn)不規(guī)則、凹凸不規(guī)則、樓板不連續(xù)、尺寸突變、局部不規(guī)則、復(fù)雜連接等多項(xiàng)不規(guī)則，屬于特別不規(guī)則超限高層建筑工程。鋼結(jié)構(gòu)連接體、獨(dú)柱及柱頂支座是整個(gè)結(jié)構(gòu)設(shè)計(jì)的關(guān)鍵。通過合理選取抗震性能目標(biāo)，采取相應(yīng)加強(qiáng)措施，保證了整體結(jié)構(gòu)安全可靠。在整體結(jié)構(gòu)設(shè)計(jì)分析基礎(chǔ)上，重點(diǎn)闡述大跨長懸挑連接體結(jié)構(gòu)動(dòng)力彈塑性分析、獨(dú)柱柱身及柱頂支座設(shè)計(jì)分析、支承獨(dú)柱防連續(xù)倒塌驗(yàn)算等關(guān)鍵問題。分析結(jié)果表明，設(shè)計(jì)采取的加強(qiáng)措施充分有效，使結(jié)構(gòu)達(dá)到了安全可靠的預(yù)期性能目標(biāo)。
［關(guān)鍵詞］特別不規(guī)則建筑； 獨(dú)柱支承； 復(fù)雜連接； 抗震性能化設(shè)計(jì)； 滑動(dòng)支座
中圖分類號(hào)：TU318， TU391文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)18-0055-05
Structural design of L-shaped out-of-code high-rise complex connected building
Wang Wanbing, Shi Guanglei, Xu Haibo, Zhang Weidong, Xia Fan, Liu Yingqiu, Fang Yunfei, Lu Xiao
(Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract:The structural plane of the expansion project of School of Economics and Management and “Creativity, Innovation & Entrepreneurship” Center in Tsinghua University is L-shaped with 134m and 116m side lengths in both directions. There are no permanent joints. The reinforced concrete frame-shear wall structural system is adopted. The structure is divided into A and B towers above the ground. At the L-shaped corner, a single column of concrete filled steel tubular (CFST) is installed to support a three-story steel structure cross-street building connector. The maximum span of the connector is 38-40m and the maximum cantilever length is 17-4m. There are many irregularities in the structure, such as torsional irregularity, concave-convex irregularity, discontinuous floor, sudden change in size, local irregularity and complex connection and so on. Therefore, the building belongs to a particularly irregular out-of-code high-rise building project. Steel structure connector, single column and pillar top supporting are the key of the whole structural design. The safety and reliability of the whole structure were guaranteed by choosing reasonable seismic performance targets and taking corresponding strengthening measures. Based on the analysis of the overall structural design, the key issues were emphatically elaborated such as dynamic elastic-plastic analysis of large-span and large-cantilever connector structure, design analysis of single column body and pillar top supporting, and checking calculation for anti-progressive collapse of supporting single column. The analysis results show that the strengthening measures taken in the design are effective enough to make the structure reach the expected performance goal of safety and reliability.
Keywords:particularly irregular building; single column supporting; complex connection; performance-based seismic design; steel sliding support
作者簡介：王皖兵，學(xué)士，高級(jí)工程師，Email: wangwanbing@biad.com.cn。
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