当前位置:
X-MOL 学术
›
J. Build. Eng.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Flexural behavior of composite beams with textile reinforced concrete (TRC) permanent formwork considering interface characteristics
Journal of Building Engineering ( IF 6.7 ) Pub Date : 2024-12-16 , DOI: 10.1016/j.jobe.2024.111602 Congcong Wang, Shiping Yin, Yushuai Zhao, Yao Li
Journal of Building Engineering ( IF 6.7 ) Pub Date : 2024-12-16 , DOI: 10.1016/j.jobe.2024.111602 Congcong Wang, Shiping Yin, Yushuai Zhao, Yao Li
The interface performance between composite reinforced concrete (RC) beams and TRC permanent formwork significantly influences the load-bearing capacity of composite beams. Based on bending tests of composite beams with varying dimensions, a numerical model considering the interface characteristics between concrete and formwork was established. The effects of member size, interface treatment, formwork shape, and the number of textile layers on the flexural behavior of composite beams were analyzed. Results indicate that as the size of composite beams increases, the interface transitions from localized microcracking to extensive debonding, altering the failure mode from bending to interface failure. For composite beams with U-shaped formwork and interfaces treated with cement paste, the load-bearing capacity increased by 16.78 %, 15.29 %, and 11.97 % for small-, medium-, and large-sized beams, respectively, compared to RC beams. This increase was approximately 10 % higher than that of composite beams with P-shaped formwork. Roughening the interface increased load-bearing capacity of composite beams by 5%–8% compared to using cement paste at interface, while the insertion of shear pins into the roughened interface had a minimal further improvement. Each additional layer of textile in formwork boosted load-bearing capacity of the composite beams by approximately 3 %, with no significant rise beyond four layers. The interface slip fluctuated along the length of beams, with peak values concentrated in shear span. Ensuring effective bonding in this region is critical for enhancing the performance of composite beams. This study provides a foundation for the design and application of composite beams with permanent formwork.
中文翻译:
考虑界面特性的纺织钢筋混凝土 (TRC) 永久模板组合梁的弯曲性能
复合筋混凝土 (RC) 梁与 TRC 永久模板之间的界面性能显着影响组合梁的承载能力。基于不同尺寸组合梁的弯曲试验,建立了考虑混凝土与模板界面特性的数值模型。分析了杆件尺寸、界面处理、模板形状和纺织层数对组合梁弯曲行为的影响。结果表明,随着复合梁尺寸的增加,界面从局部微裂纹转变为广泛的脱粘,从而将失效模式从弯曲转变为界面失效。对于具有 U 形模板和水泥浆处理界面的组合梁,小型、中型和大型梁的承载能力分别比 RC 梁提高了 16.78 %、15.29 % 和 11.97 %。这一增长比采用 P 形模板的组合梁高出约 10%。与在界面处使用水泥浆相比,界面粗化使组合梁的承载能力提高了 5%–8%,而将剪切销插入粗化界面的进一步改善很小。模板中每增加一层织物,复合梁的承载能力就会提高约 3%,超过四层时没有显着上升。界面滑移沿梁的长度波动,峰值集中在剪切跨度。确保该区域的有效粘合对于提高复合梁的性能至关重要。本研究为具有永久模板的组合梁的设计和应用提供了基础。
更新日期:2024-12-16
中文翻译:
考虑界面特性的纺织钢筋混凝土 (TRC) 永久模板组合梁的弯曲性能
复合筋混凝土 (RC) 梁与 TRC 永久模板之间的界面性能显着影响组合梁的承载能力。基于不同尺寸组合梁的弯曲试验,建立了考虑混凝土与模板界面特性的数值模型。分析了杆件尺寸、界面处理、模板形状和纺织层数对组合梁弯曲行为的影响。结果表明,随着复合梁尺寸的增加,界面从局部微裂纹转变为广泛的脱粘,从而将失效模式从弯曲转变为界面失效。对于具有 U 形模板和水泥浆处理界面的组合梁,小型、中型和大型梁的承载能力分别比 RC 梁提高了 16.78 %、15.29 % 和 11.97 %。这一增长比采用 P 形模板的组合梁高出约 10%。与在界面处使用水泥浆相比,界面粗化使组合梁的承载能力提高了 5%–8%,而将剪切销插入粗化界面的进一步改善很小。模板中每增加一层织物,复合梁的承载能力就会提高约 3%,超过四层时没有显着上升。界面滑移沿梁的长度波动,峰值集中在剪切跨度。确保该区域的有效粘合对于提高复合梁的性能至关重要。本研究为具有永久模板的组合梁的设计和应用提供了基础。