H型鋁合金壓彎構(gòu)件平面外穩(wěn)定承載力試驗及理論研究
張錚1，2，張其林1
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(1 同濟大學，上海 200092； 2 福建工程學院，福州 350007)［摘要］介紹了6個H型鋁合金擠壓型材偏心受壓試件和1個軸心受壓對比試件在一次加載下的試驗研究，考察了長細比和荷載偏心率對鋁合金壓彎構(gòu)件面外穩(wěn)定承載力的影響，數(shù)值計算結(jié)果與試驗結(jié)果吻合較好。根據(jù)鋁合金材料的特點，分別對弱硬化合金和強硬化合金進行了鋁合金壓彎構(gòu)件力學性能的理論分析?；诶碚摲治龅慕Y(jié)果，推導了計算H型鋁合金壓彎構(gòu)件面外穩(wěn)定承載力的相關(guān)公式。與數(shù)值計算結(jié)果的比較表明，相關(guān)公式采用直線形式將偏于安全。［關(guān)鍵詞］鋁合金；H型；壓彎構(gòu)件；面外穩(wěn)定承載力；相關(guān)公式Experimental and theoretical research on lateral-torsional stability of H-section aluminum beam-columnsZhang Zheng1，2, Zhang Qilin1(1 Tongji University, Shanghai 200092, China; 2 Fujian University of Technology, Fuzhou 350007, China)Abstract:Stability tests on eccentrically compressed extruded H-section aluminum alloy beam-columns were carried out. Totally 6 beam-columns were tested, their out-plane stability behaviors were observed. By contrast, an axially compressed column was also tested. The main parameters varied in the tests are load eccentricity ratio and slenderness ratio. The numerical calculating results show good agreements with the tests results. On account of the characteristic material property of aluminum alloy, theoretical research on mechanical behavior of beam-columns is made for both weak hardening and strong hardening alloy. Based on the theoretical analysis results, interaction expression for checking the lateral-torsional stability resistance of aluminum alloy beam-columns is developed. Compared with numerical calculating results, it indicates that the calculated results of the expression will tend to safety when the expression adopts linear form.Keywords:aluminum alloy; H-section; beam-column; out-plane stability resistance; interaction expression建設(shè)部國家標準《鋁合金結(jié)構(gòu)設(shè)計規(guī)范》編制項目研究成果。作者簡介：張錚，副教授，博士，Email:frp-creep@sina.com。參考文獻［1］Aluminum Association. Specification for aluminum structures［S］.1976.［2］ECCS. European recommendations for aluminum alloy structures［S］. 1978.［3］楊聯(lián)萍, 姚念亮, 邱枕戈, 等. 鋁合金軸心受壓桿件的穩(wěn)定系數(shù)研究［J］. 建筑結(jié)構(gòu), 2001, 31(4): 28-29.［4］沈祖炎, 郭小農(nóng). 對稱截面鋁合金擠壓型材壓桿的穩(wěn)定系數(shù)［J］. 建筑結(jié)構(gòu)學報, 2001, 22(4): 31-36.［5］金鑫. 單軸對稱截面鋁合金壓桿極限承載力研究［D］. 上海：同濟大學，2005.［6］羅小燕, 王志騫, 王鵬軍, 等. H形鋁合金偏心壓桿平面內(nèi)穩(wěn)定承載力研究［J］. 西安交通大學學報, 2004, 38(11): 1207-1210.［7］吳亞舸. 鋁合金受壓板件局部屈曲與受彎構(gòu)件彎扭屈曲承載力研究［D］. 上海：同濟大學，2005.［8］GB/T 228—2002 金屬材料室溫拉伸試驗方法［S］. 北京：中國標準出版社, 2002.［9］GB5237—2000 鋁合金建筑型材［S］. 北京：中國標準出版社，2000.［10］Aluminum association. Aluminum design manual: Specifications & guidelines for aluminum structures［S］. Washington, DC, 2000.［11］CEN. prEN1999-1-1:2002, Design of aluminium structures-general structural rules［S］. 2002.［12］FEDERICO M MAZZOLANI. Aluminium alloy structures［M］. 2nd ed. Chapman & Hall, London,1995.
