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蔣首超1，毛龍1，何志力2

（1 同濟(jì)大學(xué)土木工程學(xué)院， 上海 200092； 2 CCDI悉地國際， 深圳 518057）

 

［摘要］為了研究火災(zāi)下鋁合金軸心受壓構(gòu)件的穩(wěn)定承載能力，在不同溫度下，進(jìn)行了14個矩形截面鋁合金擠壓型材試件的軸心受壓試驗(yàn)。試驗(yàn)均為恒溫加載，試驗(yàn)過程中保持溫度不變，荷載持續(xù)增加，直至達(dá)到構(gòu)件的極限承載力。全部試件都發(fā)生了整體彎曲失穩(wěn)。對試驗(yàn)結(jié)果進(jìn)行了分析，并將試驗(yàn)結(jié)果與中國和歐洲鋁合金結(jié)構(gòu)設(shè)計(jì)規(guī)范進(jìn)行了比較。結(jié)果表明：在常溫下，兩種規(guī)范給出的結(jié)果與試驗(yàn)結(jié)果吻合較好；在高溫下，歐洲規(guī)范結(jié)果與試驗(yàn)結(jié)果相差較大。

［關(guān)鍵詞］高溫； 軸心受壓構(gòu)件； 鋁合金

中圖分類號：TU395      文獻(xiàn)標(biāo)識碼：A       文章編號：1002-848X(2013)16-0093-04

 

Jiang Shouchao1, Mao Long1, He Zhili2

（1 College of Civil Engineering, Tongji University, Shanghai 200092, China; 2 CCDI GROUP, Shenzhen 518057, China）

 

Abstract: In order to investigate the buckling resistance of axially loaded aluminum members under fire condition, axial compression tests were carried out on a total of 14 extruded rectangular cross-section aluminum members at different temperatures. During the tests, each specimen was loaded to collapse at a given temperature. All of the specimens failed by global flexural buckling. A comparative analysis had been conducted between the experimental results and the design results predicted by Code for design of aluminum structures（GB 50429—2007）and Eurocode 9. It is demonstrated that the design results of the both codes show good agreement with the test results at ambient temperature, while at elevated temperatures Eurocode 9 gives considerably different results in comparison with experimental data.

Keywords: elevated temperature; axial compression member; aluminum alloy

*科技部國家重點(diǎn)實(shí)驗(yàn)室基礎(chǔ)研究資助項(xiàng)目(SLDRCE08-C-04)，國家自然科學(xué)基金面上項(xiàng)目(50978205)。

作者簡介：蔣首超，博士，副教授，Email: scjiang@#edu.cn。

 

［1］ECCS European recommendations for aluminium alloys structures［S］. European Convention for Constructional Steelwork, 1978.

［2］GB 50429—2007 鋁合金結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］. 北京: 中國計(jì)劃出版社, 2007.

［3］GB/T 228-1—2010 金屬材料 拉伸試驗(yàn) 第1部分：室溫試驗(yàn)方法［S］. 北京: 中國標(biāo)準(zhǔn)出版社, 2010.

［4］EN 1999-1-1 Eurocode 9: design of aluminium structures—part 1-1: general structural rules［S］. Lodon: European Committee for Standardization, 2007.

［5］EN 1999-1-2 Eurocode 9: design of aluminium structures—part 1-2: general rules—structural fire design［S］. Lodon: European Committee for Standardization, 2007.

［6］陳驥. 鋼結(jié)構(gòu)穩(wěn)定理論與設(shè)計(jì)［M］. 2版. 北京: 科學(xué)出版社, 2003.

［7］SOUTHWELL R V. On the analysis of experimental observations in problems of elastic stability［C］//Proceeding of the Royal Society of London. 1932: 601-616.