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首页> 外文期刊>Steel & Composite Structures: An International Journal >Integrated analysis and design of composite beams with flexible shear connectors under sagging and hogging moments
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Integrated analysis and design of composite beams with flexible shear connectors under sagging and hogging moments

机译：弯矩和弯矩作用下带挠性剪力连接的组合梁的综合分析与设计

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A theoretical research project is undertaken to develop integrated analysis and design tools for long span composite beams in modem high-rise buildings, and it aims to develop non-linear finite element models for practical design of composite beams. As the first paper in the series, this paper presents the development study as well as the calibration exercise of the proposed finite element models for simply supported composite beams. Other practical issues such as continuous composite beams, the provision of web openings for passage of building services, the partial continuity offered by the connections to columns as well as the behaviour of both unprotected and protected composite beams under fires will be reported separately. In this paper, details of the finite elements and the material models for both steel and reinforced concrete are first described, and finite element studies of composite beams with full details of test data are then presented. It should be noted that in the proposed finite element models, both steel beams and concrete slabs are modelled with two dimensional plane stress elements whose widths are assigned to be equal to the widths of concrete flanges, and the flange widths and the web thicknesses of steel beams as appropriate. Moreover, each shear connector is modelled with one horizontal spring and one vertical spring to simulate its longitudinal shear and pull-out actions based on measured load-slippage curves of push-out tests of shear connectors. The numerical results are then carefully analyzed and compared with the corresponding test results in terms of load mid-span deflection curves as well as load end-slippage curves. Other deformation characteristics of the composite beams such as stress and strain distributions across the composite cross-sections as well as distributions of shear forces and slippages in shear connectors along the beam spans are also examined in details. It is shown that the numerical results of the composite beams compare well with the test data in terms of various load-deformation characteristics along the entire deformation ranges. Hence, the proposed analysis and design tools are considered to be simple and yet effective for composite beams with practical geometrical dimensions and arrangements. Structural engineers are strongly encouraged to employ the models in their practical work to exploit the full advantages offered by composite construction.
机译：进行了一项理论研究项目，以开发现代高层建筑中大跨度组合梁的综合分析和设计工具，其目的是开发用于组合梁实用设计的非线性有限元模型。作为该系列的第一篇论文，本文介绍了所提出的简单支撑组合梁有限元模型的开发研究以及校准工作。其他实际问题，例如连续的组合梁，为建筑服务的通过提供腹板开口，与柱子的连接所提供的部分连续性，以及未保护和受保护的复合梁在火灾下的性能。在本文中，首先描述了钢和钢筋混凝土的有限元和材料模型的详细信息，然后介绍了具有完整测试数据详细信息的复合梁的有限元研究。应该注意的是，在所提出的有限元模型中，钢梁和混凝土板都是用二维平面应力元建模的，平面应力元的宽度被指定为等于混凝土法兰的宽度，以及法兰的宽度和钢的腹板厚度横梁视情况而定。此外，每个剪力连接器都带有一个水平弹簧和一个垂直弹簧，以根据剪力连接器推出测试的实测载荷-滑移曲线模拟其纵向剪力和拔出动作。然后仔细分析数值结果，并在载荷中跨挠度曲线和载荷端滑移曲线方面将其与相应的测试结果进行比较。还详细检查了复合梁的其他变形特征，例如跨复合横截面的应力和应变分布以及剪切连接器中沿梁跨度的剪力和滑移分布。结果表明，在整个变形范围内，复合梁的数值结果与试验数据在各种载荷-变形特性方面均具有很好的对比。因此，对于具有实用几何尺寸和布置的复合梁，所提出的分析和设计工具被认为是简单而有效的。强烈鼓励结构工程师在实际工作中使用这些模型，以充分利用复合结构的全部优点。

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