冷彎薄壁構(gòu)件腹板局部受壓承載力分析及設(shè)計建議*
鐘煒輝，孟寶，郝際平，周文斌
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（西安建筑科技大學(xué)土木工程學(xué)院，西安 710055）［摘要］由于冷彎薄壁構(gòu)件截面厚度較薄，當無橫向加勁肋時，構(gòu)件可能會在集中荷載作用處發(fā)生腹板壓跛現(xiàn)象，我國現(xiàn)行《冷彎薄壁型鋼結(jié)構(gòu)技術(shù)規(guī)范》(GB 50018—2002)僅對壓型鋼板給出了驗算公式，但對常用的C形、Z形截面構(gòu)件并未進行具體規(guī)定。綜合分析國外相關(guān)標準的規(guī)定，并考慮我國結(jié)構(gòu)設(shè)計的實際情況，給出了統(tǒng)一的冷彎薄壁構(gòu)件腹板局部受壓承載力的計算公式。由試驗數(shù)據(jù)、數(shù)值分析和設(shè)計算例的對比可以看出，該公式適用于壓型鋼板及C形、Z形截面的冷彎薄壁構(gòu)件，為現(xiàn)行規(guī)范GB 50018—2002的修訂提供依據(jù)。［關(guān)鍵詞］冷彎薄壁構(gòu)件; 腹板壓跛; 局部受壓承載力; 計算公式; 數(shù)值分析中圖分類號：TU391 文獻標識碼：A 文章編號：1002-848X(2015)05-0086-05Local bearing capacity analysis for the web of cold-formed thin-wall member and design recommendationZhong Weihui, Meng Bao, Hao Jiping, Zhou Wenbin(School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)Abstract: Because of the thin sectional plate, the web crippling may happen under concentrated load at the web of cold-formed thin-wall member without transverse stiffeners. The Technical code of cold-formed thin-wall steel structures (GB 50018—2002) only provides the checking formula for profiled steel sheet, but has no specific provisions for the commonly used C-shaped and Z-shaped members. Investigated the provisions of foreign standards comprehensively, and considered the actual conditions of domestic structural design, the common formula calculating local bearing capacity for the web of cold-formed thin-wall member was given. Through comparison with experimental data, numerical analysis and design example, it shows that this formula can apply not only to the profiled steel sheet but also to the C-shaped and Z-shaped cold-formed thin-wall members, which provides the basis for amendments of current code GB 50018—2002.Keywords: cold-formed thin-wall member; web crippling; local bearing capacity; formula; numerical analysis*國家自然科學(xué)基金青年科學(xué)基金項目（51308442），陜西省教育廳專項科研項目（2013JK0976）。作者簡介：鐘煒輝，博士，副教授，Email: zhongweihui1980@163.com。參考文獻［1］GB 50018—2002 冷彎薄壁型鋼結(jié)構(gòu)技術(shù)規(guī)范［S］. 北京: 中國計劃出版社, 2002.［2］陳紹蕃. 鋼結(jié)構(gòu)設(shè)計原理［M］. 3版.北京: 科學(xué)出版社, 2005.［3］田微, 郭成喜. 冷彎槽鋼承受集中荷載時腹板壓屈的數(shù)值分析［J］. 鋼結(jié)構(gòu), 2013, 28(2): 7-11.［4］楊應(yīng)華. 槽鋼和卷邊槽鋼檁條局部受壓承載力計算［C］//中國鋼結(jié)構(gòu)協(xié)會房屋建筑鋼結(jié)構(gòu)分會2009年學(xué)術(shù)年會論文集. 2009: 175-181.［5］鞏俊松, 鄧長根. 冷彎薄壁型鋼受彎構(gòu)件特有的失穩(wěn)模式［J］. 河北工程大學(xué)學(xué)報:自然科學(xué)版, 2007, 24(4): 24-27.［6］于煒文.冷成型鋼結(jié)構(gòu)設(shè)計［M］.董軍，夏冰，譯. 3版.北京: 中國水利水電出版社, 2003.［7］EN 1993-1-3∶2006 Eurocode 3: design of steel structures, part 1-3: general rules-supplementary rules for cold-formed members and sheeting［S］. European Committee for Standardization, 2006.［8］NAS 2001 North American specification for the design of cold-formed steel structural members［S］. American Iron and Steel Institute, 2001.［9］AS/NZS 4600∶2005 Cold-formed steel structures［S］. New Zealand Standard, 1996.［10］YOUNG B, HANCOCK G J. Cold-formed steel channels subjected to concentrated bearing load［J］. Journal of Structural Engineering, 2003, 129(8): 1003-1010.［11］于安麟, 何保康. 壓型鋼板單槽口集中荷載的取值［J］.鋼結(jié)構(gòu), 1992, 17(3): 56-57.［12］段紅霞. 鋼結(jié)構(gòu)工程設(shè)計施工實用圖集［M］.北京: 機械工業(yè)出版社, 2007.
