方鋼管混凝土短柱軸壓極限承載力計(jì)算方法分析*
劉潔1，王正中2
- 摘 要
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(1 楊凌職業(yè)技術(shù)學(xué)院建筑工程分院， 楊凌 712100； 2 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院， 楊凌 712100)［摘要］從方鋼管對(duì)混凝土的約束機(jī)理出發(fā)，分析了組成方鋼管混凝土短柱各部分的應(yīng)力狀態(tài)，將方鋼管對(duì)核心混凝土的約束作用等效為有效側(cè)向應(yīng)力，利用復(fù)雜應(yīng)力下鋼材及混凝土極限(屈服)條件，基于極限平衡理論，建立了柱截面的力學(xué)平衡方程，推導(dǎo)了該柱的軸壓極限承載力計(jì)算公式。應(yīng)用推導(dǎo)公式對(duì)42根方鋼管混凝土短柱試件的軸壓承載力進(jìn)行計(jì)算，比較計(jì)算結(jié)果與試驗(yàn)結(jié)果，兩者吻合良好。［關(guān)鍵詞］方鋼管混凝土; 軸心受壓; 極限承載力; 極限平衡法中圖分類(lèi)號(hào)：TU398 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)10-0021-05Analysis on calculating method of ultimate bearing capacity of concrete-filled square steel tubeshort columns under axial loadLiu Jie1, Wang Zhengzhong2（1 Department of Architectural Engineering, Yangling Vocational and Technical College， Yangling 712100, China; 2 College of Water Conservancy and Construction Engineering, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China）Abstract: Based on the constraint mechanism of concrete from the square steel tube, the stress states of various parts of concrete-filled square steel tube columns were analyzed. The restraint effect of core concrete from square steel tube was equivalent for the effective lateral stress. Using ultimate (yield) conditions of steel and concrete under the complex stress, mechanical equilibrium equation of columns section was established based on the limit equilibrium theory. And the calculation formula of axial compression ultimate bearing capacity of the columns was derived. The axial compression bearing capacities of 42 concrete-filled square steel tube columns were calculated using proposed formula. Results show that the test results are in good agreement with the calculation results.Keywords:concrete-filled square steel tube; axial compression; ultimate bearing capacity; limit equilibrium method*國(guó)家自然科學(xué)基金項(xiàng)目（51179164）。作者簡(jiǎn)介：劉潔，博士研究生，副教授， Email: liu712100@163.com。參考文獻(xiàn)［1］韓林海，陶忠.方鋼管混凝土軸壓力學(xué)性能的理論分析與試驗(yàn)研究［J］.土木工程學(xué)報(bào)，2001，34(2)：17-25.［2］韓林海.鋼管混凝土結(jié)構(gòu)：理論與實(shí)踐［M］.北京： 科學(xué)出版社， 2004.［3］TOMII M. Inelastic behavior of concrete filled steel tubular beam-column［C］ //International Colloquium on Stability of Structures Under Static and Dynamic Load. Washington D. C.， 1997： 17-19.［4］呂西林，余勇，陳以一，等.軸心受壓方鋼管混凝土短柱的性能研究：Ⅰ試驗(yàn)［J］.建筑結(jié)構(gòu)，1999，29(10)：41-43.［5］KENJI SAKINO，HIROYUKI 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.［6］王菁，李四平，關(guān)罡，等.方鋼管混凝土柱軸壓承載力的計(jì)算［J］.建筑結(jié)構(gòu)，1997，27(5)：13-15.［7］Recommendations for design and construction of concrete filled steel tubular structures［S］.Tokyo:Architectural Institute of Japan, 1997.［8］ENV1994-1-1-1992 Eurocode 4: Design of Composite steel and concrete structures— Part 1-1: general rules and rules for building［S］. Brussels: British Standards Institution， 2004.［9］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(guó)計(jì)劃出版社，2004.［10］AISC Load and resistance factor design specification for structural steel buildings［S］.Chicago： American Institute of Steel Construction，1999.［11］鐘善桐. 鋼管混凝土結(jié)構(gòu)［M］. 3版.北京：清華大學(xué)出版社，2003.［12］蔡紹懷. 現(xiàn)代鋼管混凝土結(jié)構(gòu)［M］.北京：人民交通出版社，2003.［13］蔡健，孫剛.方形鋼管約束下核心混凝土的本構(gòu)關(guān)系［J］.華南理工大學(xué)學(xué)報(bào)：自然科學(xué)版，2008, 36(1)：105-109.［14］MANDER J B， PRIESTLY M J N， PARK R. Theoretical stress-strain model for confined concrete［J］. Journal of Structural Engineering， 1988， 114(8)： 1807-1826.
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