新型弦支剛架結(jié)構(gòu)體系的設(shè)計與分析
嚴(yán)仁章，陳志華，王小盾，陳強
- 摘 要
-
(天津大學(xué)建筑工程學(xué)院，天津 300072)［摘要］結(jié)合某一實際工程，在對比研究梁柱節(jié)點連接形式對弦支剛架結(jié)構(gòu)性能影響的基礎(chǔ)上，確定了梁柱節(jié)點采用剛性連接的形式。針對風(fēng)吸荷載較大的情況，分析了弦支剛架的預(yù)應(yīng)力設(shè)計方法。鑒于弦支剛架的梁柱-拉索節(jié)點受力復(fù)雜，設(shè)計了補強型梁柱-拉索節(jié)點，并建立有限元模型分析其力學(xué)性能，驗證了補強型梁柱-拉索節(jié)點受力的合理性。通過分析弦支剛架的整體力學(xué)性能，得到其力學(xué)分布規(guī)律，同時分析結(jié)果還表明，弦支剛架的剛度大，結(jié)構(gòu)變形小。對比弦支剛架與普通門式剛架在相同荷載下的內(nèi)力表明，相對普通門式剛架上弦梁的跨中彎矩，弦支剛架上弦梁的跨中彎矩減小了69.35%。［關(guān)鍵詞］弦支剛架結(jié)構(gòu); 預(yù)應(yīng)力設(shè)計; 補強型梁柱拉索節(jié)點; 結(jié)構(gòu)力學(xué)性能中圖分類號：TU394 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2015)05-0025-05Design and analysis of a new cable-supported steel frame structural systemYan Renzhang, Chen Zhihua, Wang Xiaodun, Chen Qiang(School of Civil Engineering, Tianjin University, Tianjin 300072, China)Abstract: Rigid connection of beam-column connection was adopted in an engineering project with the consideration of the effect of beam-column connection on structural behavior of the cable-supported steel frame structure. The pre-stress design method applied in the structure was specifically analyzed due to the relatively large wind load. Considering complex mechanical performance of beam-column-cable joint of the structure, a reinforced beam-column-cable joint was designed and its mechanical behavior was analyzed with finite element model to verify the mechanical feasibility of the joint. The mechanical distribution law of the structure was obtained through overall mechanical proporty analysis of the cable-supported steel frame, and analysis results indicate that the overall stiffness of the structure is large and the structural deformation is small. A comparison of the stress of the cable-supported steel frame and the traditional steel frame without cables shows that the mid-span moment of the upper chord beam of the new structure reduces about 69.35%.Keywords: cable-supported steel frame structure; pre-stress design; reinforced beam-columncable joint; mechanical property of structure通訊作者：王小盾，博士，副教授，Email: maodun2004@126.com。參考文獻(xiàn)［1］李一凡, 劉福勝, 孫勇. 門式剛架輕型結(jié)構(gòu)房屋的發(fā)展現(xiàn)狀［J］. 鋼結(jié)構(gòu), 2006, 21(85): 1-4.［2］陳志華. 張弦結(jié)構(gòu)體系［M］. 北京: 科學(xué)出版社, 2013.［3］MASAO SAITOH. Principle of beam string structure［C］//World Congress on Shell and Spatial Structure-proceeding IASS Symposium. Madrid，1979: 617-638.［4］陳志華. 弦支結(jié)構(gòu)體系研究進(jìn)展［J］. 建筑結(jié)構(gòu), 2011, 41(12): 24-31.［5］丁博涵. 張弦梁結(jié)構(gòu)的靜力、抗震和抗風(fēng)性能研究［D］. 杭州: 浙江大學(xué), 2005.［6］楊睿, 董石麟, 倪英戈. 預(yù)應(yīng)力張弦梁結(jié)構(gòu)的形態(tài)分析——改進(jìn)的逆迭代法［J］. 空間結(jié)構(gòu), 2002(4): 30-34.［7］喬景, 陳志華,王曉林,等. 預(yù)應(yīng)力剛架的應(yīng)用［C］//第六屆全國現(xiàn)代結(jié)構(gòu)工程學(xué)術(shù)研討會論文集. 保定，2006: 1351-1355.［8］王宏斌, 賈鳳蘇, 吳耀華. 大連周水子國際機場航站樓鋼結(jié)構(gòu)設(shè)計［J］. 建筑結(jié)構(gòu), 2006, 36(S1): 114-117.［9］GB 50009—2012 建筑結(jié)構(gòu)荷載規(guī)范［S］. 北京: 中國建筑工業(yè)出版社, 2012.［10］GB 50017—2003 鋼結(jié)構(gòu)設(shè)計規(guī)范［S］. 北京: 中國計劃出版社, 2003.
