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Concrete Component of the Rotational Ductility of Reinforced Concrete Flexural Members

机译：钢筋混凝土受弯构件旋转延性的混凝土构件

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摘要

Reinforced concrete flexural members inherently rely on member ductility to ensure a safe design by allowing for: redistribution of applied stress resultants; quantification of drift for determining magnified moments; and for the absorption of seismic, blast and impact energy. Structural engineers have recognised that much of the member rotation is concentrated in a small region referred to as the plastic hinge and because of the complexity of the problem this has been quantified mainly through testing. In this paper, a new plastic hinge approach that is based on well established shear-friction theory is postulated. The generic behaviour of this novel shear-friction hinge is shown to agree with that exhibited in tests. Furthermore, the shear-friction hinge explains the mechanics of the benefits of confinement, such as that due to FRP encasement or steel stirrups, on the rotational capacity of RC members.
机译：钢筋混凝土受弯构件固有地依靠构件的延展性来确保安全设计，方法是：允许重新分配施加的应力结果；量化漂移以确定放大的矩；并吸收地震，爆炸和冲击能。结构工程师已经认识到，大部分构件旋转都集中在称为塑料铰链的较小区域内，并且由于问题的复杂性，主要通过测试对其进行了量化。在本文中，提出了一种基于完善的剪切摩擦理论的新型塑料铰链方法。这种新颖的剪切摩擦铰链的一般性能与测试结果相吻合。此外，剪切摩擦铰链解释了限制作用的机理，例如，由于FRP包裹或钢箍筋，限制作用对RC构件的旋转能力。

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