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（1 西安建筑科技大學(xué)土木工程學(xué)院 710055； 2 中國(guó)建筑西北設(shè)計(jì)研究院  西安  710003）

［提要］對(duì)5根密實(shí)截面鋼混凝土組合梁的變形性能進(jìn)行了試驗(yàn)研究。試件全部采用簡(jiǎn)支，跨中兩點(diǎn)對(duì)稱(chēng)單調(diào)靜力加載，考慮抗剪連接程度及栓釘布置形式的影響。得到各種情況下組合梁界面滑移分布曲線(xiàn)及彎矩-撓度曲線(xiàn)，分析其變形性能。試驗(yàn)結(jié)果及理論分析表明，現(xiàn)行鋼結(jié)構(gòu)規(guī)范規(guī)定的組合梁撓度計(jì)算公式對(duì)部分剪力連接組合梁來(lái)說(shuō)偏于不安全，提出了相應(yīng)的計(jì)算公式。

［關(guān)鍵詞］鋼-混凝土組合梁；變形性能；界面滑移；抗剪連接程度

Experiment Study on Interface Slippage and Deformation Performance of Composite Steelconcrete Beams/Fu Guo１, Xue Jianyang１，Ge Hongpeng２, Zhao Hongtie１, Wang Zhen２(1 School of Civil Eng., Xi" an Univ. of Arch. ＆ Tech., Xi" an 710055, China; 2 China Northwest Building Design and Research Institute, Xi"an 710003, China)

Abstract:Experiments  of 5 simplysupported steelconcrete composite beams (SCCB) with compact steel sections are conducted to investigate the deformation behavior. The influences of degree of shear connection and stud arrangement are discussed. The changes of loaddeflection relationships and the loadslip relationships along the span of beam are analyzed. Based on the experimental research and theoretical analyses, it is found that the deformations are unsafely evaluated for partial shear connection beams with the reduced stiffness method in the current Chinese code  of steel structures design. The formula are derived for the rigidity of partial shear connection SCCB. The predicted of deflection values are in good with the experimental results.

Keywords:steelconcrete composite beams; deformation; slip; degree of shear connection