为研究钢-混凝土组合梁在不同加载方式下的受扭性能，完成了6根钢。混凝土组合粱的弯扭试验和纯扭试验，其中2根粱的扭矩直接作用于工字钢粱上，其余4根粱则由锕粱和混凝土翼绿板作为整体共同受扭。试验结果表明。当扭矩 直接作用于钢粱上时，混凝土翼缘板通过栓钉对钢粱的扭转提供约束，从而使钢粱的抗扭承载力比纯钢梁的提高2倍以上。在试验参数相同时，混凝土翼缘板和钢粱作为整体复合受扭时组合粱的开裂扭矩及极限抗扭承载力比扭矩直接作用于钢粱时的分别提高86%和39%。分析了两种不同加载方式下钢。混凝土组台粱受扭和受弯承载力的变化。建立了扭矩直接作用于钢梁上时极限扭矩的计算模型及计算公式。时整体受扭时组合粱的弯矩相关性进行了分析，并建立了相关曲线公式。计算结果与实测值吻合较好。

This paper describes an experimental study on behavior of steel and high-strengrth concrete (HSC) composite beams. Seven model HSC composite beams and one normal. strength concrete (NSC) beam were tested under monotonic loading. All beams were designed for a full shear connection between the steel beam and the concrete flange USing shear studs. It was identified that the HSC composite beams had higher initial stiffness and very distinct post. yielding characteristics compared wim the NSC beam. Test results of the HSC specimens also showed several favorabte design aspects such as a larger margin beyond the steel yielding and greater ultimate deformability. Analysis based on the current design codes can providea reasonable estimation to the flerural bzitial stiffness andul timate flexural capaci of the HSC composite beams.

为研究钢-混凝土组合梁在负弯矩作用下混凝土翼缘裂缝的发生和发展情况，对8根钢-压型钢板混凝土组合梁进行了试验研究，结果表明，影响组合梁裂缝的因素比较复杂，需要采取有效的措施加以控制。同时，结合试验和理论分析，进一步完善了钢-混凝土组合梁混凝土翼缘最小配筋率、开裂弯矩和最大裂缝宽度的计算方法，计算结果与实测值吻合良好。

有端横梁约束的简支单向组合梁-板体系在横向荷载作用下，由于剪力连接件的约束，翼缘板中存在剪力滞后现象。结构体系中，端横梁对剪力滞后程度有很大影响。本文采用有限元方法，对翼缘有效宽度的主要影响因素进行参数分析，其中包括宽跨比、荷载类型、滑移刚度、端横梁约束程度等，并拟合出了各种情况下有效宽度的简化计算公式，通过与有限元方法及其它计算方法的对比，说明了本文公式的准确性。

The present study investigated the effects of shear slip on the deformation of steel-concrete composite beams. The equivalent rigidity of composite beams considering three different loading types was first derived based on equilibrium and curvature compatibility, from which a general formula to account for slip effects was then developed. The predicted results were compared with measurements of six specimens tested in the present study and other available test results for both simply supported and continuous beams. It was found that including slip effects has significantly improved the accuracy of prediction. For typical beams used in practice, shear slip in partial composite beams has a significant contribution to beam deformation. Even for full composite beams, slip effects may result in stiffness reduction up to 17% for short span beams. However, slip effects are ignored in many design specifications that use transformed section method except that American Institute of Steel Construction (AISC) specifications recommend a calculation procedure in the commentary. In the AISC procedure, stress and deflection calculations of partially composite girders are based on effective section modulus and moment of inertia to account for slip, while ignoring slip effects in full composite sections. For full composite sections, the effective section modulus and moment of inertia calculated with the AISC specifications are larger than that of present study, meaning that the specifications are not on the conservative side. For partial composite sections, the AISC predictions are more conservative than the present study.