| 温度梯度下计算钢梁弯曲承载力计算的适应因子 |
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| 作者姓名： | M.B.Wong |
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| 摘 要： | 适应因子提供了估计温度梯度下钢梁弯曲承载力的简单方法。欧洲的钢结构设计规范中介绍了火灾情况适应因子的应用。由于其他结构或非结构构件进行局部防火保护时,钢或混凝土组合梁内通常会出现温度梯度。当无保护的钢截面存在任何温度梯度时,欧洲规范规定适应因子取值0.7,在同样火灾情况下对有保护的梁适应因子取值0.85,这些值被用于提高钢梁的计算弯曲承载力,此时假定横截面温度均匀。有关适应因子的文献很少。本文对在火灾中,按照欧规对钢梁在不均匀温度场中适应因子的设计取值进行验算。通过各种温度梯度情况的数值计算,对其在钢或混凝土组合梁结构一般情况下的应用进行了研究。并对规范所采纳的适应因子值的稳定性进行讨论并给出了推荐值。
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| 关 键 词： | 适应因子 组合梁 火 抗弯承载力 钢结构设计 温度梯度 |
Adaptation Factor for Moment Capacity Calculation of Steel Beams Subject to Temperature Gradient |
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| M.B.Wong.Adaptation Factor for Moment Capacity Calculation of Steel Beams Subject to Temperature Gradient[J].Steel Construction,2008(1). |
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| Authors: | MBWong |
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| Abstract: | Adaptation factors provide a simple means to estimate the moment capacity of a steel beam subject to temperature gradient.The use of adaptation factors is introduced in Eurocode for structural steel design under fire conditions.Temperature gradients arise in a steel/concrete composite beam usually as a result of the partial protection from fire by another structural or non-structural member.For a bare steel section subject to any temperature gradient,a value of 0.7 is stipulated for the adaptation factor in... |
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| Keywords: | Adaptation factor Composite beam Fire Moment capacity Steel design Temperature gradient |
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