- 摘 要
-
（哈爾濱工業(yè)大學(xué)建筑設(shè)計研究院， 哈爾濱 150090）
［摘要］以國家技術(shù)轉(zhuǎn)移鄭州中心工程中的長懸挑鋼桁架結(jié)構(gòu)為例，采用MIDAS Building軟件，選取拆除構(gòu)件法對其進行抗連續(xù)倒塌分析；闡述驗證懸挑桁架結(jié)構(gòu)形式抗連續(xù)倒塌能力的具體過程，討論了樓板剛度退化后懸挑桁架的承載能力和相應(yīng)的加強措施；采用ANSYS軟件對懸挑鋼桁架典型節(jié)點進行了有限元分析。結(jié)合規(guī)范規(guī)定和結(jié)構(gòu)自身特點，提出了相應(yīng)的構(gòu)造措施，如桿件采用對稱截面和樓板通長配筋可使構(gòu)件能夠承受往復(fù)地震作用，設(shè)置有效面外支撐、節(jié)點按剛接處理可提高結(jié)構(gòu)的抗連續(xù)倒塌性能等，供其他類似工程參考。
［關(guān)鍵詞］懸挑鋼桁架； 抗連續(xù)倒塌； 拆除構(gòu)件法； 樓板剛度退化； 節(jié)點有限元分析
中圖分類號：TU391文獻標(biāo)識碼：A文章編號：1002-848X(2018)12-0070-05
Progressive collapse resistance design for steel cantilevered truss of National Center for Technology Transfer in Zhengzhou
Shang Qingpeng, Chen Minghui, Wang Xianwei, Cai Li, Wang Chunyan
(The Architectural Design and Research Institute of HIT, Harbin 150090, China)
Abstract:Taking the long-cantilevered steel truss structure in the National Center for Technology Transfer in Zhengzhou as an example, the MIDAS Building software was used to perform the progressive collapse resistance analysis using the demolition member method. The specific process for verifying the progressive collapse resistance of cantilevered truss structure was described. The load-bearing capacity and strengthening measures of the cantilevered trusses after the degradation of the floor stiffness were discussed. The finite element analysis was performed on the typical joints of the cantilevered truss using ANSYS software. Combining with the specifications and the characteristics of the structure itself, corresponding construction measures were proposed. For example, the symmetrical cross-section of the member and the full-length reinforcement in the floor would make the members be able to withstand the reciprocating earthquake actions. Effective out-of-plane braces were set up and the joints were designed as rigid connections. Those measures could improve the progressive collapse resistance performance of the structure, which could be used as a reference for other projects.
Keywords: cantilevered steel truss; progressive collapse resistance; demolition member method; degradation of the floor stiffness; finite element analysis of joint
作者簡介：尚慶鵬，碩士，工程師，Email:sqphit@126.com。
