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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］國(guó)家會(huì)議中心二期項(xiàng)目總建筑面積40-9萬(wàn)m2，主要功能為會(huì)議、展覽及配套用房。主體結(jié)構(gòu)利用首層頂板及其周邊夾層設(shè)置巨型轉(zhuǎn)換桁架，實(shí)現(xiàn)會(huì)議、展覽大空間跨越，并作為支承上部多層建筑的轉(zhuǎn)換結(jié)構(gòu)。著重對(duì)大跨重載轉(zhuǎn)換結(jié)構(gòu)在豎向荷載、溫度作用及施工過程中的傳力路徑及承載能力進(jìn)行系統(tǒng)分析，并分別采用時(shí)程分析、振型分解反應(yīng)譜法及規(guī)范簡(jiǎn)化算法對(duì)轉(zhuǎn)換結(jié)構(gòu)豎向地震作用效應(yīng)進(jìn)行評(píng)估。選取典型轉(zhuǎn)換桁架進(jìn)行抗連續(xù)倒塌分析，并對(duì)重載轉(zhuǎn)換結(jié)構(gòu)相關(guān)范圍樓蓋進(jìn)行了舒適度分析，驗(yàn)證了主體結(jié)構(gòu)在彈性階段的承載能力及剛度。根據(jù)性能化設(shè)計(jì)要求，對(duì)主體結(jié)構(gòu)進(jìn)行動(dòng)力彈塑性分析，考察罕遇地震作用下主體結(jié)構(gòu)抗震性能及關(guān)鍵構(gòu)件損傷情況。

［關(guān)鍵詞］大跨重載轉(zhuǎn)換結(jié)構(gòu)； 豎向地震響應(yīng)； 溫度作用； 抗連續(xù)倒塌分析； 樓板舒適度分析

中圖分類號(hào)：TU318文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)18-0065-06

Structural design of second-phase project of National Convention Center

Wang Xinxin, Yu Donghui, Han Wei, Chang Ting, Xu Jinbei, Cai Chong, Liu Chang

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The second phase of the National Convention Center has a total construction area of 409 000 m2. Its main functions are conferences, exhibitions and supporting houses. The main structure uses the first floor and its surrounding mezzanine to set up a giant conversion truss to realize the large space spanning of the conference and exhibition, and as a conversion structure supporting the upper multi-story building. The force transmission path and bearing capacity of the large-span conversion structure under vertical load, temperature effect during the construction process were systematic analyzed, and the time-history analysis, the vibration mode decomposition response spectrum method and the standard simplification algorithm were used to evaluate the effects of vertical earthquake action of conversion structure.The typical conversion truss was selected for anti-progressive collapse analysis, and the comfort analysis of the relevant cover of the heavy-duty conversion structure was carried out to verify the bearing capacity and rigidity of the main structure in the elastic stage. According to the performance design requirements, the dynamic elastoplastic analysis of the main structure was carried out to investigate the seismic performance and damage of key components of the main structure under rare earthquakes.

Keywords:long-span heavy-load transfer structure; vertical seismic response; temperature effect; anti-progressive collapse;  floor comfort analysis

作者簡(jiǎn)介：王鑫鑫，碩士，工程師，Email:wangxinxin@biad.com.cn。