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[提要]  根據(jù)鋼框架柱穩(wěn)定設(shè)計(jì)的計(jì)算長(zhǎng)度概念，以部分框架為計(jì)算單元，用變剛度的螺旋彈簧模擬梁柱節(jié)點(diǎn)連接的柔性，通過引入柔性連接剛度修正系數(shù)，建立了無(wú)側(cè)移和有側(cè)移柔性連接鋼框架柱計(jì)算長(zhǎng)度系數(shù)修正公式，其形式與我國(guó)鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范( GBJ17-88)規(guī)定的計(jì)算長(zhǎng)度穩(wěn)定方程完全相同，可供工程設(shè)計(jì)人員使用。
[關(guān)鍵詞]  柔性連接 框架柱 穩(wěn)定 計(jì)算長(zhǎng)度

According to the column effective length concept of steel frames stability design,  the modified formulas of column effective length factor in both braced frames and unbraced frames with flexible connection are derived by taking partial frame as an analysis element, usmg a rotation spring which has variable stiffness to model flexibility of beam-column connection and introducing a modified stiffness factor of flexible connection. The form of these formulas for computing effective length factor is exactly the same as that of rigidly connected steel frames which have been well established in Steel Struture Design Specification (GBJ17 - 88)and the formulas can be of some assistance to the engineers in steel frames design.
Keywords: flexible connection; frame column; stability; effective length