方鋼管鋼骨混凝土雙偏壓柱試驗研究與有限元分析*
趙同峰，歐陽偉，李冬松
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（遼寧省交通高等?？茖W(xué)校道路橋梁工程系，沈陽 110122）［摘要］進行了9根方鋼管鋼骨混凝土雙向偏壓柱試驗，研究其破壞形態(tài)，分析荷載與縱向應(yīng)變關(guān)系及長細比、加載方向等參數(shù)變化對雙偏壓柱受力性能的影響。結(jié)果表明：當(dāng)荷載達到極限荷載的50%~70%，鋼管的受壓區(qū)開始屈服；當(dāng)荷載達到極限荷載的80%~90%，鋼骨的受壓區(qū)開始屈服。在試驗參數(shù)范圍內(nèi)，加載角度的變化對偏壓柱的受力性能影響不大。通過有限元法建立計算模型，模型計算結(jié)果與試驗結(jié)果吻合很好。在此基礎(chǔ)上，通過變化計算參數(shù)，分析了不同長細比、偏心距條件下，加載角度對偏壓柱受力性能的影響。結(jié)果表明，隨著長細比及偏心距的增大，加載角度的變化對雙偏壓柱受力性能的影響也越來越大。［關(guān)鍵詞］方鋼管；鋼骨；雙偏壓；承載力；計算公式中圖分類號：TU398文獻標(biāo)識碼：A文章編號：1002-848X(2011)08-0087-05Experiment research and finite element analysis of square steel tube columns filled with steel reinforced concrete subjected to bi\|axial eccentric-compressionZhao Tongfeng, Ouyang Wei, Li Dongsong(School of Road and Bridge, Liaoning Provincial College of Communications, Shenyang 110122, China)Abstract:Experimental research of 9 square steel tube columns filled with steel reinforced concrete subjected to bi\|axial eccentric compression was presented. Failure mode and load versus longitudinal strain curves were analyzed. Influence of load direction and slenderness ratio were also analyzed. The test results show that the-steel tube begins to yield when load gets to 50%~70% ultimate bearing capacity and the steel reinforced begins to yield when load gets to 80%~90% ultimate bearing capacity. Different angles of loading have little effect on the bearing capacity. Furthermore, a finite element analysis model was established and the calculated results were agreed well with the test ones. Influence of load directions under different slenderness and eccentricity was also analyzed. Results show that the more slenderness and eccentricity the more influence of load direction on the bearing capacity.Keywords:square steel tube; steel reinforced; bi\|axial eccentric compression; capacity; computation formula*國家教育部博士點基金項目（20050145012）。作者簡介：趙同峰，博士，講師，Email:ztfgty@sohu.com。參考文獻［1］朱美春. 鋼骨\|方鋼管自密實高強混凝土柱力學(xué)性能研究［D］. 大連:大連理工大學(xué),2005.［2］ZHU M C, WANG Q X, FENG X F Behavior and strength of square steel tube columns filled with steel-reinforced self-compacting high-strength concrete［C］//1st International Symposium on Design, Performance andUse of Self-Consolidating Concrete, Changsha, China: SCC, 2005.［3］趙同峰,王連廣.方鋼管鋼骨高強混凝土壓彎承載力計算［J］工程力學(xué),2008,25(10): 122-125.［4］HIBBITT, KARLSON, SORENSON, Inc. ABAQUS Version 6.4: Theory manual, users’ manual, verification manual and example problems manual［M］. Hibbitt, Karlson and Sorenson Inc., 2003.［5］SCHNEIDER S P. Axially loaded concrete-filled steel tubes［J］.Journal of Structural Engineering, ASCE, 1998, 124(10):1125-1138.［6］SUSANTHA K S, GE H B, USAMI T. Confinement evaluation of concrete-filled box-shaped steel columns［J］.Steel and Composite Structures,2001,1(3):313-328.［7］HU H T, HUANG C S, WU M H, et al. Nonlinear analysis of axially loaded concrete-filled tube columns with confinement effect［J］.Journal of Structural Engineering, 2003,129(10):1322-1329.［8］ROEDER C W, CAMERON B, BROWN C B. Composite action in concrete filled tubes［J］.Journal of Structural Engineering, 1999, 125(5):234-238.［9］韓林海.鋼管混凝土結(jié)構(gòu)——理論與實踐［M］. 2版. 北京:科學(xué)出版社，2007.
