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首页> 外文会议>International Conference on High Performance Structures and Materials; 2006; Ostends(BE) >Behaviour model and experimental study for the torsion of reinforced concrete members
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Behaviour model and experimental study for the torsion of reinforced concrete members

机译：钢筋混凝土构件扭转的行为模型与试验研究

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摘要

The typical behavioural curve of a reinforced concrete element with longitudinal bars and stirrups under torsion comprises two distinct regions; the elastic part until the first cracking and the part after cracking. The different character of the response in these regions reveals the different nature of the load resisting mechanism in each case. The present work addresses an approach that combines two different analytical models in order to predict the entire torsional behaviour. The prediction of the elastic part until the first cracking is achieved using a smeared crack analysis for plain concrete in torsion, whereas for the description of the post-cracking response the softened truss model is used. Further, the results of an experimental investigation on the behaviour of 15 reinforced concrete beams subjected to pure torsion are also presented in this paper. The reported results include the behavioural curves and the values of the initial torsional stiffness, the cracking torque moment and the ultimate torque capacity of the beams. Analyses for the torsional behaviour of the tested beams using the proposed approach were performed and analytical curves are produced and compared with the experimental ones. A good agreement between predicted and experimental results is observed.
机译：带有纵筋和箍筋的钢筋混凝土构件在扭转作用下的典型行为曲线包括两个不同的区域。弹性部分，直到第一次开裂为止。这些区域中响应的不同特征揭示了每种情况下负载抵抗机制的不同性质。本工作提出了一种将两种不同的分析模型结合起来的方法，以预测整个扭转行为。对于在扭转状态下的普通混凝土，使用拖尾裂缝分析法可以预测直到第一次裂缝之前的弹性部分，而对于后裂缝响应的描述，则使用软化的桁架模型。此外，本文还提供了对15条钢筋混凝土梁在纯扭作用下的性能进行实验研究的结果。报告的结果包括梁的行为曲线和初始扭转刚度，开裂力矩和极限抗弯能力的值。使用所提出的方法对被测梁的扭转行为进行了分析，并产生了分析曲线并将其与实验曲线进行比较。观察到预测结果与实验结果之间的良好一致性。

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