天津周大福中心雨棚索-鋼管混凝土柱節(jié)點性能分析
陳學(xué)森1，施剛1，丁大益2
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(1 土木工程安全與耐久教育部重點實驗室，清華大學(xué)土木工程系，北京 100084；2 中國五洲工程設(shè)計集團(tuán)有限公司，北京 100053)
［摘要］天津周大福中心的雨棚采用懸挑索結(jié)構(gòu)，拉索與鋼管混凝土柱的連接節(jié)點設(shè)計是雨棚設(shè)計的重要內(nèi)容。為了使兩者可靠連接，提出了兩種索-鋼管混凝土柱節(jié)點的構(gòu)造形式。運用有限元方法分析了兩種節(jié)點構(gòu)造形式的受力性能，對比了兩種節(jié)點的失效模式、承載力和應(yīng)力分布。結(jié)果表明，兩種節(jié)點的失效模式均為銷軸孔壁承壓破壞，通過改變耳板的厚度和銷軸的直徑可以調(diào)整節(jié)點的承載力。通過比較，設(shè)計荷載下節(jié)點A中鋼管和混凝土的應(yīng)力水平低于節(jié)點B。對節(jié)點A進(jìn)行了進(jìn)一步的優(yōu)化以滿足工程應(yīng)用要求，并提出了一般的索鋼管混凝土柱節(jié)點構(gòu)造建議。［關(guān)鍵詞］索; 鋼管混凝土; 節(jié)點; 有限元分析中圖分類號：TU391 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2016)09-0058-05
Performance analysis of cableconcrete filled steel tube connection in canopy of Tianjin CTF Finance CentreChen Xuesen1, Shi Gang1, Ding Dayi2(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2 China Wuzhou Engineering Group, Beijing 100053, China)Abstract: Cantilevered cable structure is employed in the canopy of Tianjin CTF Finance Centre, and the design of cable-concrete filled steel tube connection is an important part of the design of this canopy. To get a reliable performance, two connection forms were introduced, and finite element models were built to analyze and compare the failure mode, resistance and strain distribution of each connection form. According to the results, the failure modes of both connections are bearing failure, and the resistance of the connection can be adjusted by changing the thickness of the pin connected plate or the diameter of the pin. The stress level of concrete and steel tube under design load in connection A is lower than that in connection B, thus a further optimization was conducted for connection A to satisfiy the requirement in practice, and a reconmmended configuration is proposed for this connection type.Keywords: cabel; concrete filled steel tube; connection; finite element analysis
通訊作者：施剛，博士，教授，博士生導(dǎo)師，Email: shigang@tsinghua.edu.cn。
