- 摘 要
-
（1 清華大學土木工程安全與耐久教育部重點實驗室， 北京 100084；2 北京工業(yè)大學建筑工程學院， 北京 100124）
［摘要］為研究復合鋼管高強混凝土構(gòu)件的受彎性能，完成了8個試件的靜力試驗。結(jié)果表明，試件跨中撓度達到其跨度的1/18時，除個別試件外，承載力均尚未下降；增大方鋼管的壁厚或增大圓鋼管的直徑，都可提高構(gòu)件的受彎承載力和彈性抗彎剛度。采用簡化纖維模型（條帶法）計算試件的跨中彎矩-撓度關(guān)系曲線，采用疊加法計算試件的受彎承載力，兩者所得結(jié)果與試驗結(jié)果均符合良好。
［關(guān)鍵詞］復合鋼管高強混凝土構(gòu)件; 靜力試驗; 簡化纖維模型; 疊加法; 受彎承載力
中圖分類號：TU398+.1，TU317+.2 文獻標識碼：A 文章編號：1002-848X(2014)04-0025-05
Test study on bending behavior of composite-sectioned high strength concrete-filled steel tubular members
Zhang Yang1, Qian Jiaru1, Cao Wanlin2
(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China)
Abstract: To study the flexural behavior of composite-sectioned high strength concrete filled steel tubular (CSCFT) members, static test of 8 simple-supported specimens was performed. The test results indicated that even the mid-span vertical deflection reaches 1/18 of span, the flexural strength of most specimens does not drop yet. Increasing the wall thickness of square steel tube or increasing the diameter of circular steel tube could increase the flexural strength and the sectional elastic bending stiffness of CSCFT members. The mid-span moment-deflection curves of specimens calculated by the simplified fiber model has good agreement with the test curves. The flexural strength of specimens calculated by superposition method also has good agreement with the test results.
Keywords: composite-sectioned high strength concrete filled steel tubular member; static test; simplified fiber model; superposition method; flexural strength
*北京市科技計劃重點項目(D09050600370000)。
作者簡介：張揚，博士，Email: yang-zhang08@mails.tsinghua.edu.cn。
參考文獻
［1］錢稼茹, 張揚, 紀曉東, 等. 復合鋼管高強混凝土短柱軸心受壓性能試驗與分析［J］.建筑結(jié)構(gòu)學報, 2011, 32(12): 162-169.
［2］GB 50010—2010 混凝土結(jié)構(gòu)設計規(guī)范［S］. 北京: 中國建筑工業(yè)出版社, 2011.
［3］過鎮(zhèn)海. 鋼筋混凝土原理［M］. 北京: 清華大學出版社, 1999.
［4］KENJI SAKINO, HTROYUKI NAKAHARA, SHOSUKE MORINO, et al. Behavior of centrally loaded concrete-filled steel-tube short columns ［J］. Journal of Structural Engineering, 2004, 130(2): 180-188.
［5］葉列平. 鋼筋混凝土結(jié)構(gòu)設計［M］. 北京: 中國建筑工業(yè)出版社, 2012.
［6］JGJ 3—2010 高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］. 北京: 中國建筑工業(yè)出版社, 2011.
［7］CECS 159∶2004矩形鋼管混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］. 北京: 中國計劃出版社, 2004.
