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1) 西安建筑科技大學(xué)，710055；2)中國(guó)建筑西北設(shè)計(jì)研究院，西安，710003；3)蘇州科技學(xué)院，215011。

［提要］楔形變截面H型鋼構(gòu)件設(shè)計(jì)中常采用高而薄的腹板，這樣能夠充分發(fā)揮翼緣的承載能力，節(jié)省材料。如此雖然可能引起腹板的局部屈曲，但板件的屈曲并不意味著構(gòu)件承載能力的喪失。應(yīng)用非線性板殼有限元分析方法，對(duì)變截面壓彎構(gòu)件平面內(nèi)穩(wěn)定極限承載力進(jìn)行了分析。在考慮腹板局部屈曲和構(gòu)件整體屈曲相關(guān)作用的同時(shí)，系統(tǒng)地分析與評(píng)價(jià)了腹板寬厚比、翼緣寬厚比、構(gòu)件長(zhǎng)細(xì)比和楔率等對(duì)壓彎構(gòu)件平面內(nèi)穩(wěn)定極限承載力的影響，并與《門式剛架輕型房屋鋼結(jié)構(gòu)技術(shù)規(guī)程》(CECS102:2002)的計(jì)算結(jié)果進(jìn)行了比較，結(jié)論可供工程設(shè)計(jì)參考。

［關(guān)鍵詞］楔形壓彎構(gòu)件；局部屈曲；屈曲后強(qiáng)度；極限承載力

Research on Ultimate Loadcarrying Capacity Inplane of Tapered Member /Li Cheng1,Xu Bairong2, Gu Qiang3(1 Xi"an University of Architecture ＆ Technology, Xi"an 710055, China; 2 China Northwest Building Design and Research Institute, Xi"an 710003,China; 3 University of Science and Technology of Suzhou,Suzhou 215011, China)

Abstract:For tapered H-section members, thin and high webs are adopted, and the design fully develops flange bearing capacity and save materials. This kind of design method can lead to local buckling of web ,but this doesn"t mean to lose bearing capacity. Based on the non-linear shell element method, analysis for ultimate load carrying capacity of tapered H-section column in plane is carried out. Considering the interaction of web local buckling and overall buckling of member, the effects of web width to thickness ratio, flange width to thickness ratio, slenderness ratio of member and web tapering ratio on ultimate load carrying capacity of column are analyzed and evaluated. After comparing the analysis results of non-linear finite element me

thod with those of current.Technical Specification for Steel Structure of Light-weight Buildings with Gabled Frames, some valuable conclusions are consulted.

Keywords:H-section tapered column; local buckling; post buckling strength; ultimate load carrying capacity