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（武漢大學(xué)土木建筑工程學(xué)院， 武漢 430072）

［摘要］以柱腳鉸接形式的大坡度剛架結(jié)構(gòu)為研究對(duì)象，進(jìn)行了理論公式推導(dǎo)及ANSYS有限元計(jì)算分析，提出了該種結(jié)構(gòu)形式柱的頂部支撐剛度計(jì)算公式與剛架柱計(jì)算長(zhǎng)度系數(shù)的實(shí)用性擬合公式。計(jì)算結(jié)果表明：斜梁坡度增大對(duì)剛架結(jié)構(gòu)柱頂支座的剛度有削弱的作用，大坡度剛架結(jié)構(gòu)柱的柱腳采用鉸接形式時(shí)，其計(jì)算長(zhǎng)度系數(shù)隨斜梁坡度的增大而增大，在實(shí)際工程的設(shè)計(jì)工作中，可參考建議公式或單獨(dú)采用有限元模擬確定剛架柱計(jì)算長(zhǎng)度系數(shù)以進(jìn)行結(jié)構(gòu)穩(wěn)定設(shè)計(jì)。

［關(guān)鍵詞］大坡度剛架； 剛架柱計(jì)算長(zhǎng)度系數(shù)； 擬合公式； 有限元模擬

中圖分類(lèi)號(hào)：TU317文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)06-0062-06

Study on calculation length coefficient of rigid frame column with large slope and hinged column base

Xue Xue, Guo Yaojie, Wen Hao, Cao Ke

(School of Civil Engineering， Wuhan University, Wuhan 430072, China)

Abstract:Taking the rigid frame structure with large slope and hinged column base as the object of study, the derivation of the theoretical formula and the finite element analysis of the ANSYS were carried out. The practical fitting formulas of the top support stiffness calculation formula and calculation length coefficient of rigid frame  column were proposed. The calculated results show that the increase of the inclined beam slope has a weakening effect on the stiffness of the top support of the rigid frame column. If the column base of the rigid frame column with large slope adopts the hinged form, the calculation length coefficient increases with the increase of the slope of the inclined beam. In the actual project design, proposed formula can be referred to or a separate finite element simulation can be used to determine the calculation length coefficient of column for structural stability design.

Keywords:rigid frame structure with large slope; calculation length coefficient of column; fitting formula; finite element simulation

*國(guó)家自然科學(xué)基金（51378401），中央高?；究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金（2042016kf1126）。

作者簡(jiǎn)介：薛雪，碩士研究生， Email：echolytze@foxmail.com。