Flexural performance of concrete-encased CFST box members
Flexural performance of concrete-encased CFST box members
复制标题
混凝土包裹钢管混凝土箱形构件的弯曲性能
DOI：
10.1016/j.istruc.2020.07.065
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发表时间：
2020-10
期刊：
影响因子：
4.1
通讯作者：
Ting-Min Mu
中科院分区：
文献类型：
--
作者：
Jin-Yang Chen;Fa-Cheng Wang;Lin-Hai Han;Ting-Min Mu
本文研究了钢管混凝土箱形构件的受弯性能。进行了12根钢管混凝土箱梁的受弯试验，研究了截面尺寸、钢管直径和受弯方向对钢管混凝土箱梁性能的影响。对试验结果进行了讨论，包括在整个加载过程中观察到的破坏模式和混凝土裂缝的发展。然后建立了数值模型，研究了组合梁的抗弯性能。研究了全过程分析、荷载传递机理和应力分布规律。然后基于有限元模型进行参数化研究。最后，提出了一种计算外包钢管混凝土箱梁刚度和抗弯承载力的简化方法。
The flexural behavior of concrete-encased CFST box members is presented in this paper. Twelve bending tests were conducted to evaluate the influence of section size, steel tube diameter and bending direction on the performance of the concrete-encased CFST box beams. The test results were also discussed, including the observed failure patterns and developments of concrete cracks during the whole loading procedure. A numerical model was then developed to investigate the flexural behavior of the composite beams. The study of the full-range analysis, load transfer mechanism and stress distribution was carried out. Then the parametric studies were performed based on the FEA modeling. Finally, a simplified method for predicting the stiffness and flexural strength of the concrete-encased CFST box beams was presented.
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