空心芯板扭转性能的评定

IF 0.8 Q4 ENGINEERING, GEOLOGICAL
Ana Isabel Sarkis Fernandez, T. Sullivan, E. Brunesi, R. Nascimbene
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引用次数: 1

摘要

预制预应力空心板在建筑中有许多应用,其中预应力空心板受到剪切、扭转或剪切和扭转的组合。尽管如此,挤压HC单元不包含横向钢筋,由于剪切和扭转作用,其固有地易受脆性破坏模式的影响。在作者之前的工作中,开发了HC单元在剪切中失效的有限元建模方法,并根据实验测试数据进行了验证。本文旨在扩展所提出的有限元方法的适用性,以帮助提高对HC单元扭转行为的理解。为此,根据文献中的实验数据对所开发的模型进行了进一步验证,然后用于预测新西兰特定200mm深HC装置的扭转能力。结果表明,有限元模型能够预测HC板在有和无垂直荷载偏心情况下的承载力。最后,将数值结果用于评估现有简化分析方法的性能,这些方法用于评估HC单元的扭转能力,如果与预期的材料特性一起使用,则发现这些方法是非保守的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of the torsional behaviour of hollow core slabs
There are many applications in buildings in which precast pre-stressed hollow-core (HC) slabs are subjected to shear, torsion, or combined shear and torsion. Nonetheless, extruded HC units contain no transverse reinforcement, being inherently vulnerable to brittle failure modes due to shear and torsional actions. In previous work by the authors, a finite element (FE) modelling approach for HC units failing in shear was developed and validated against experimental test data. This paper aims to extend the applicability of the proposed FE approach to help improve the understanding of the torsional behavior of HC units. For this purpose, the developed model is further validated against experimental data available in the literature and then used to predict the torsional capacity of New Zealand-specific 200 mm deep HC units. Results suggest that the FE model is capable of predicting the capacity of HC slabs with and without eccentricity of the applied vertical load. Finally, the numerical results are used to evaluate the performance of available simplified analysis approaches for assessing the torsional capacity of HC units, which are found to be non-conservative if used with expected material properties.
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来源期刊
CiteScore
2.50
自引率
17.60%
发文量
14
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