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(哈爾濱工業(yè)大學(xué)土木工程學(xué)院，哈爾濱 150090)
［摘要］為了研究冷彎型鋼受彎構(gòu)件平面內(nèi)的穩(wěn)定性能，對(duì)直卷邊和斜卷邊的冷彎型鋼C形截面受彎構(gòu)件分別進(jìn)行了試驗(yàn)研究和有限元參數(shù)分析。試驗(yàn)研究和有限元分析均包含構(gòu)件純彎和非純彎兩部分。研究結(jié)果表明，多數(shù)構(gòu)件在非純彎作用下的抗彎承載力高于純彎作用下的，但也有部分以局部和畸變相關(guān)屈曲為主的構(gòu)件在純彎作用下的抗彎承載力略高。屈曲模式是影響構(gòu)件抗彎承載力的重要因素，構(gòu)件以畸變屈曲為主時(shí)，非純彎作用下的抗彎承載力明顯高于純彎作用下的。
［關(guān)鍵詞］冷彎型鋼；C形截面；受彎構(gòu)件；平面內(nèi)穩(wěn)定性能；抗彎承載力；畸變屈曲
Investigation on-in-plane stability behavior of cold-formed steel C-section flexural members
Wang Haiming， Zhang Yaochun(School of Civil Engineering，Harbin Institute of Technology，Harbin 150090，China)
Abstract:In order to investigate the in-plane stability behavior of cold-formed steel flexural members, bending tests and finite element parametric analysis of cold-formed steel C-section flexural members with upright and inclined edge stiffeners have been conducted. The tests and finite element analysis both include flexural members under pure bending and non-pure bending. The results show that the bending strength under non-pure bending is higher than that under pure bending for most of members, but some members which buckle in interaction of local and distortional buckling have little higher bending strength under pure bending. The buckling mode is a key factor that influences the member′s bending strength. The bending strength under nonpure bending is much higher than that under pure bending when they buckle in distortional buckling.
Keywords:cold-formed steel；C-section；flexural member; in-plane stability behavior; bending strength; distortional buckling
作者簡介：王海明，博士研究生，Email: haim_wang@126.com。
參考文獻(xiàn)
［1］YU C，SCHAFER BW. Local buckling tests on cold-formed steel beams［J］. Journal of Structural Engineering，2003,129(12).
［2］YU C，SCHAFER BW. Distortional buckling tests on cold-formed steel beams［J］. Journal of Structural Engineering，2006,132(4).
［3］YU C，SCHAFER BW. Simulation of cold-formed steel beams in local and distortional buckling with applications to the direct strength method［J］. Journal of Construction Steel Research， 2007, 63(5).