- 摘 要
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（1 新加坡國立大學(xué)土木與環(huán)境工程學(xué)院， 新加坡 117576； 2 南京工業(yè)大學(xué)土木工程學(xué)院，南京 210009）
［摘要］為了減小構(gòu)件尺寸和結(jié)構(gòu)自重，超高強(qiáng)混凝土和高強(qiáng)鋼材在高層建筑中的應(yīng)用越來越廣泛。但是，能夠指導(dǎo)高強(qiáng)材料應(yīng)用設(shè)計(jì)的試驗(yàn)數(shù)據(jù)和設(shè)計(jì)規(guī)范卻很少?；诟邚?qiáng)鋼管混凝土在常溫和高溫下的試驗(yàn)得出了一些重要結(jié)論；通過一系列試驗(yàn)研究了高強(qiáng)材料的力學(xué)性能，如短柱在軸向壓力下、梁受彎以及細(xì)長梁\|柱在軸心和偏心壓力下的結(jié)構(gòu)性能。試驗(yàn)試件采用了屈服強(qiáng)度達(dá)到780MPa的高強(qiáng)鋼材和圓柱體抗壓強(qiáng)度達(dá)到180MPa的超高強(qiáng)混凝土；對試驗(yàn)所得結(jié)果與通過修正版歐洲規(guī)范EN 1994\|1\|1 Eurocode 4方法所得結(jié)果進(jìn)行了對比分析。此外，還收集了2 000多組普通或者高強(qiáng)鋼管混凝土的試驗(yàn)數(shù)據(jù)樣本，通過分析給出了通用設(shè)計(jì)建議，可供實(shí)踐參考。
［關(guān)鍵詞］組合結(jié)構(gòu)； 鋼管混凝土； 高強(qiáng)鋼； 超高強(qiáng)混凝土； 耐火性
中圖分類號：TU398,TU973文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2015)11-0037-06
Design of high strength concrete filled steel tube columns for tall buildings
Xiong Mingxiang1, J. Y. Richard Liew1,2
（1 Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576;
2 College of Civil Engineering， Nanjing Tech University, Nanjing 210009, China）
Abstract:Ultra-high strength concrete and high tensile steel are becoming very attractive materials for high-rise buildings because of the need to reduce member size and structural self-weight. However, limited test data and design guidelines are available to support the applications of high strength materials for building constructions. The significant findings from comprehensive experimental investigations on the behaviour of tubular columns in-filled with ultra-high strength concrete were present at ambient and elevated temperatures. A series of tests were conducted to investigate the basic mechanical properties of the high strength materials, and structural behavior of stub columns under concentric compression, beams under moment and slender beam-columns under concentric and eccentric compression. High tensile steel with yield strength up to 780MPa and ultra-high strength concrete with compressive cylinder strength up to 180MPa were used to construct the test specimens. The test results are compared with the predictions using a modified EN 1994\|1\|1 Eurocode 4 approach. In addition, more than 2000 test data samples collected from literature on concrete filled steel tubes with normal and high strength materials were also analyzed to formulate the design guide for implementation in practice.
Keywords:composite structure； concrete filled steel tube column； high tensile steel； ultra-high strength concrete； fire resistance
通訊作者：J.Y.Richard Liew,教授，Email:ceeljy@nus.edu.sg。
參考文獻(xiàn)
［1］LIEW J Y R, XIONG D X. Ultra-high strength concrete filled composite columns for multi-storey building construction ［J］. Advances in Structural Engineering, 2012，15(9)：1487\|1503.
［2］LIEW J Y R, XIONG D X. Effect of preload on the axial capacity of concrete\|filled composite columns［J］. Journal of Constructional Steel Research, 2009,65: 709-722.
［3］EN 1994-1-1 Eurocode 4 Design of composite steel and concrete structures—part 11: general rules and rules for buildings［S］.2004.
［4］ANSI/AISC 360-10 Specification for structural steel buildings［S］. Chicago:American Institute of Steel Construction, 2010.
［5］DBJ/T 13-51—2010 鋼管混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］. 福州, 2010.
［6］EN 1993-1-2 Eurocode 3 Design of steel structures—part 1-2: general rules-structural fire design［S］.2005.
［7］GOODE C D. Composite columns-1819 tests concrete filled steel tube columns compared with Eurocode 4［Ｊ］. The Structural Engineer, 2008, 86(16)：33\|38.
［8］LIEW J Y R., ZHANG M H, CHIA K. Steel concrete composite systems employing ultra-high strength steel and concrete for sustainable high rise construction SERC Grant ［R］.Department of Civil and Environmental Engineering, National University of Singapore, 2013.
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