An Analytical Failure Envelope for the Design of Textile Reinforced Concrete Shells
An Analytical Failure Envelope for the Design of Textile Reinforced Concrete Shells
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纺织钢筋混凝土壳设计的分析破坏包络线
DOI：
10.1016/j.istruc.2018.06.001
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发表时间：
2018
期刊：
影响因子：
4.1
通讯作者：
Hawkins W
中科院分区：
文献类型：
--
作者：
Hawkins W
与弯曲作用的等效结构相比，由于其高结构效率，壳体具有显著减少建筑物材料消耗的潜力。纺织钢筋混凝土（TRC）是一种很有前途的材料，用于建造薄混凝土壳，由于其强度，几何多功能性和耐久性。现有的TRC壳体设计方法预测的局部能力之间的线性插值实验确定的纯拉伸，纯弯曲，纯压缩强度值。这种简化导致在弯曲和压缩的组合中显著低估强度。完全依赖物理测试结果也有效地阻止了外壳设计的探索和优化。本文提出了一种基于混凝土和钢筋性能的TRC分析设计方法，首次考虑了轴力和弯矩的高度非线性相互作用，并对15 mm和30 mm厚度的TRC试件进行了纯拉、纯弯和压弯组合试验。在压缩和弯曲组合下，预测强度是保守的，但在其他方面是准确的。对于测试的标本，所提出的方法增加了预测强度的一个因素高达3.7相比，现有的方法，同时保持保守，因此，它的使用可能会导致显着的材料节省和新的应用TRC壳。
Shells have the potential to considerably reduce material consumption in buildings due to their high structural efficiency compared to equivalent structures acting in bending. Textile reinforced concrete (TRC) is a promising material for the construction of thin concrete shells due to its strength, geometric versatility, and durability. Existing design methods for TRC shells predicts the local capacity by linear interpolation between experimentally determined values of strength in pure tension, pure bending, and pure compression. This simplification leads to a significant underestimation of strength in combined bending and compression. Relying entirely on physical test results also effectively prohibits exploration and optimisation of the shell design. This paper proposes a new analytical design approach for TRC which is instead derived from the properties of the concrete and reinforcement, and for the first time captures the highly non-linear interaction between axial and bending forces.A series of pure tension, pure bending, and combined bending and compression tests were carried out on TRC specimens of 15 mm and 30 mm thickness. The predicted strengths were conservative under combined compression and bending but otherwise accurate. For the specimens tested, the proposed method increases the predicted strength by a factor of up to 3.7 compared to existing methods, whilst remaining conservative, and hence its use could lead to significant material savings and new applications for TRC shells.
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