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首页> 外文期刊>Journal of bridge engineering >Plastic Rotation of an RCC T-Beam Bridge Girder under the Combined Influence of Flexure and Torsion
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Plastic Rotation of an RCC T-Beam Bridge Girder under the Combined Influence of Flexure and Torsion

机译：弯曲与扭转共同作用下RCC T型梁桥的塑性旋转

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摘要

In the nonlinear analysis of a reinforced concrete T-beam bridge superstructure using grillage idealization, and rigid-plastic idealization of moment-curvature and torque-twist relationships of the resulting grillage members, it becomes necessary to compute the plastic rotation capacity of the resulting T-beam bridge girder due to limited ultimate strain capacity of concrete. An idea about the plastic rotation capacity of these members enables one to determine the true ultimate load carrying capacity of this type of structure, extent of redistribution of stresses at failure, and ductility of the structure. This paper presents analytical methods to determine the plastic rotation capacity of reinforced cement concrete T-beam bridge girder (or grillage member) under the combined influence of flexure and torsion. The methods have been validated by experiments. The analytical methods are based on skew-bending and space truss theories. The tests have been carried out on 1:6 microconcrete models. The salient conclusions have been enumerated.
机译：在使用格栅理想化对钢筋混凝土T梁桥上部​​结构进行非线性分析以及所得格栅构件的弯矩曲率和扭矩扭转关系的刚塑性理想化中，有必要计算所得T形梁的塑性旋转能力由于混凝土的极限抗拉能力有限，梁桥大梁。关于这些构件的塑性旋转能力的想法使人们能够确定这种类型结构的真正极限承载能力，破坏时应力的重新分布程度以及结构的延展性。本文提出了在弯曲和扭转共同作用下确定钢筋混凝土T型梁桥梁梁（或格栅构件）塑性旋转能力的分析方法。该方法已通过实验验证。分析方法基于歪斜弯曲和空间桁架理论。测试已在1：6的微混凝土模型上进行。得出了重要的结论。

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