Effectiveness of flange plates on torsional behaviors of ultra-high-performance fiber-reinforced concrete hollow beams
Effectiveness of flange plates on torsional behaviors of ultra-high-performance fiber-reinforced concrete hollow beams
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DOI：
10.1016/j.dibe.2023.100227
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发表时间：
2023-09
影响因子：
8.2
通讯作者：
Jiale Zhou;Peng Yu;Doo-Yeol Yoo;Lie Yu;Lu Ke
中科院分区：
文献类型：
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作者：
Jiale Zhou;Peng Yu;Doo-Yeol Yoo;Lie Yu;Lu Ke
本文研究了不同截面尺寸和不同类型的翼缘对超高性能纤维混凝土空心梁抗扭性能的影响。开发并验证了有限元模型，用于模拟扭转行为。通过实验和数值模拟的方法研究了法兰的基本参数的影响。结果表明，翼缘的存在对UHPFRC空心梁的抗扭承载力影响较大，主要是由截面塑性抗扭弯矩和翼缘受拉承载力共同作用的结果。腹板厚度对翼缘板的有效性有很大影响。在厚壁UHPFRC梁的扭转性能，但薄壁UHPFRC梁的影响最小的翼缘配筋率，翼缘宽度和厚度的增加有有利的影响，但在翼缘类型和增加。薄壁梁的破坏是由腹板厚度和腹板配筋决定的。
This study investigates the effectiveness of flanges with various types of stirrup and cross-sectional dimensions on the torsional behaviors of ultra-high-performance fiber-reinforced concrete (UHPFRC) hollow beams. A finite element model was developed and validated for simulating the torsional behavior. The impact of the essential parameters of flanges was investigated through experimental and numerical methodologies. The results showed that the inclusion of flanges substantially influenced the torsional strength of UHPFRC hollow beams, attributed to the section torsional plastic resistance moment and UHPFRC tensile capacity in flanges. The effectiveness of flange plates was considerably influenced by the web wall thickness. The stirrup type and the increase in flange reinforcement ratio, flange width, and thickness had a favorable effect on the torsional behaviors of thick-walled UHPFRC beams but minimal effect on thin-walled UHPFRC beams. The failure of thin-walled beams was determined by the web thickness and web reinforcements.