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（上海交通大學(xué)船舶海洋與建筑工程學(xué)院， 上海 200240）

［摘要］為研究拼接鋼柱構(gòu)件的整體穩(wěn)定性能，對(duì)兩端都有彈簧約束的軸心受壓拼接鋼柱構(gòu)件進(jìn)行了靜力穩(wěn)定分析，得到了拼接鋼柱構(gòu)件的屈曲方程。分析了不同桿端約束拼接鋼柱構(gòu)件的整體穩(wěn)定性能，得到了相應(yīng)的構(gòu)件計(jì)算長度系數(shù)，并通過參數(shù)分析，得到拼接位置和拼接剛度對(duì)拼接鋼柱整體穩(wěn)定性能的影響規(guī)律。通過算例分析，驗(yàn)證了分析方法的適用性和可靠性。研究結(jié)果表明，拼接會(huì)降低柱子的承載力，而且其影響不可以忽略。

［關(guān)鍵詞］拼接鋼柱; 靜力平衡法; 屈曲; 計(jì)算長度系數(shù)

中圖分類號(hào)：TU391文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)23-0102-05

Overall stability behaviour analysis of spliced steel column

Zhu Dongmei, Zhao Jincheng

(School of Naval Architecture, Ocean& Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract:To investigate the overall stability behaviour of spliced steel columns, the static stability analysis on axially compressed spliced steel columns with spring constraints at both ends was carried out, and the buckling equation of spliced steel columns was obtained. The overall stability behaviour of spliced steel columns with different restrain conditions at the member ends was analyzed. The corresponding effective length coefficient of each component was obtained, and through the parameter analysis, the influences of the splice position and splice stiffness on overall stability of spliced steel columns were studied. Through the example analysis，the applicability and reliability of analysis method were verified. The research results show that splices can reduce the bearing capacity of the columns, and the influence can not be ignored.

Keywords:spliced steel column;  static equilibrium method; buckling; effective length coefficient

*國家自然科學(xué)基金項(xiàng)目(51478263)。

作者簡介：朱冬梅，博士研究生，Email: vvvkaivvv@ sjtu.edu.cn。