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基于不同試驗(yàn)方法的高強(qiáng)等邊角鋼穩(wěn)定性研究*
郭宏超1,郝際平2,簡(jiǎn)政1,劉茂社1,張?zhí)旃?
摘 要
郭宏超1,郝際平2,簡(jiǎn)政1,劉茂社1,張?zhí)旃?
(1 西安理工大學(xué)土木建筑工程學(xué)院, 西安 710048; 2 西安建筑科技大學(xué)土木工程學(xué)院, 西安 710055; 3 河南省電力勘察設(shè)計(jì)院, 鄭州 450001)
 
[摘要]在單根構(gòu)件和子結(jié)構(gòu)承載力試驗(yàn)基礎(chǔ)上,分析對(duì)比了Q460等邊角鋼的破壞模式、穩(wěn)定承載力、端部約束影響等。研究表明:子結(jié)構(gòu)承載力試驗(yàn)?zāi)苷鎸?shí)反映構(gòu)件在結(jié)構(gòu)中的受力性能和實(shí)際約束條件,子結(jié)構(gòu)承載力試驗(yàn)值略高于單根構(gòu)件試驗(yàn)值,可作為檢驗(yàn)、校核構(gòu)件承載力的依據(jù);按《美國(guó)輸電鐵塔設(shè)計(jì)導(dǎo)則》(ASCE 10—97)計(jì)算的承載力理論值偏低,其構(gòu)件穩(wěn)定系數(shù)有待修正。研究為Q460高強(qiáng)角鋼的規(guī)范制訂和工程應(yīng)用提供了合理依據(jù)。
[關(guān)鍵詞]高強(qiáng)角鋼; 極限承載力; 長(zhǎng)細(xì)比; 局部屈曲; 破壞模式
中圖分類號(hào):TU392.6文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-848X(2013)13-0051-04
 
Stability study of high strength equal angle steel based on different test methods
Guo Hongchao1, Hao Jiping2, Jian Zheng1, Liu Maoshe1, Zhang Tianguang3
(1 Department of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an 710048, China;2 Department of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China; 3 Henan Electric Power Survey & Design Institute, Zhengzhou 450001, China)
 
Abstract: Based on the single component and substructure bearing capacity tests, the failure mode, stability bearing capacity and end constraint influence of Q460 high strength equal angle steel were compared. The results show that the test of substructure can truly reflect the mechanical behaviors and actual constraints of the structural components. The substructure test value, which a little larger than single component test, can be the basis for checking the bearing capacity of structural components. The calculated theoretical value according to the ASCE 10—97 is a little small, so the stability coefficient of the component needs to be amended. The research provides the reasonable basis for amending the specification and engineering practice of Q460 high strength angle steels.
Keywords: high strength angle steel; ultimate bearing capacity; slenderness ratio; local buckling; failure mode
*國(guó)家自然科學(xué)基金資助項(xiàng)目(51078310),西安市建設(shè)科技項(xiàng)目計(jì)劃(sjw201219),陜西省教育廳自然科學(xué)專項(xiàng)(2013JK0967)。
作者簡(jiǎn)介:郭宏超,博士,講師,Email:ghc-1209@163.com。
 
參考文獻(xiàn)
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[2]GB 50017—2003 鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范[S]. 北京: 中國(guó)計(jì)劃出版社, 2003.
[3]陳紹蕃. 單邊連接單角鋼壓桿的計(jì)算與構(gòu)造[J]. 建筑科學(xué)與工程學(xué)報(bào),2008,25(2):72-78.
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[5]沈祖炎,胡學(xué)仁. 單角鋼壓桿的穩(wěn)定計(jì)算[J]. 同濟(jì)大學(xué)學(xué)報(bào):自然科學(xué)版,1982, 10(2): 56-71.
[6]ELGAALY M,PAGHER H,DAVIDS W.Behavior of single-angle-compression members[J].Journal of Structural Engineering, 1991, 117(12):3720-3741.
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