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(內(nèi)蒙古科技大學(xué)土木工程學(xué)院, 包頭 014010)

摘要: 冷彎型鋼梁柱節(jié)點(diǎn)剛度對(duì)結(jié)構(gòu)承載力影響較大,因此對(duì)冷彎型鋼梁柱斜節(jié)點(diǎn)進(jìn)行研究。 基于歐洲規(guī)范組件法計(jì)算冷彎型鋼梁柱斜節(jié)點(diǎn)初始剛度,根據(jù)已有試驗(yàn)得到的梁柱斜節(jié)點(diǎn)變形特征和破壞模式分別進(jìn)行理論和有限元分析,提出冷彎型鋼梁柱斜節(jié)點(diǎn)的計(jì)算模型,推導(dǎo)節(jié)點(diǎn)初始剛度的理論計(jì)算公式。 結(jié)果表明:試驗(yàn)結(jié)果與理論計(jì)算結(jié)果的平均誤差為 3. 6%,說(shuō)明公式比較可靠。 此外,對(duì)冷彎型鋼梁柱 L 形節(jié)點(diǎn)進(jìn)行拓展分析,發(fā)現(xiàn)計(jì)算公式同樣具有適用性。

關(guān)鍵詞: 冷彎型鋼; 梁柱斜節(jié)點(diǎn); 組件法; 初始剛度

中圖分類號(hào):TU391 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)13-0094-05

DOI:10. 19701 / j. jzjg. 20201560

Research on initial stiffness of cold-formed steel beam-column oblique joint

CHEN Ming, REN Hao, GAO Peng, LI Bushuan

(College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China)

Abstract: The stiffness of cold-formed steel beam-column oblique joint has a greater influence on the structural bearing capacity, so the cold-formed steel beam-column oblique joint was studied. The initial stiffness of the cold-formed steel beam-column oblique joint was calculated based on the Eurocode component method, and the theoretical and finite element analysis were carried out according to the deformation characteristics and failure modes obtained from the existing tests. The calculation model of the cold-formed steel beam-column oblique joint and the theoretical calculation formula of the joint initial stiffness was deduced. The results show that the average error between the experimental results and the theoretical calculation results is 3. 6%, indicating that the formula is relatively reliable. In addition, the cold-formed steel L-shaped joints were expanded and analyzed, and it is found that the calculation formula is also applicable.

Keywords:cold-formed steel; beam-column oblique joint; component method; initial stiffness

∗國(guó)家自然科學(xué)基金項(xiàng)目(51768055) 。第一作者:陳明,博士,教授,碩士生導(dǎo)師,主要從事鋼結(jié)構(gòu)研究,Email: cmlx-1978@ 163. com。通信作者:任昊,碩士,主要從事鋼結(jié)構(gòu)研究,Email: 709472072@ qq. com。