CFRP-GFRP-钢纤维增强混凝土复合桥面体系力学性能研究

Analysis on the CFRP-GFRP Beam with UFC Composite Bridge Deck System's Mechanical Property

钢纤维增强混凝土克服了传统混凝土的脆性,增加了混凝土的韧性,提高了混凝土的强度,碳纤维和玻璃纤维具备重量轻、强度高、耐腐蚀性能好等优点,利用碳纤维、玻璃纤维和钢纤维混凝土建造的复合桥面体系可以充分发挥各种材料优良的力学性能,提高桥面体系的承载力,延长使用寿命,降低桥面的维护成本.本文运用有限元软件对一种CFRP-GFRP-钢纤维增强混凝土复合桥面体系进行了力学性能分析研究,得到了不同截面形式的复合桥面结构的轴向应变分布曲线,计算结果与相关文献中的试验结果分布规律基本一致.结果表明:复合桥面体系既能充分发挥碳纤维和玻璃纤维的抗拉强度,又能很好地利用纤维增强混凝土的抗压性能,有限元分析结果与试验结果基本吻合,为复合桥面体系的推广应用及研究提供了参考.

Steel fiber reinforced concrete can overcome the brittleness of traditional concrete, and increase the tenacity and strength of concrete. Carbon fiber and glass fiber own light weight, high strength and good corrosion resistance. In order to obtain the excellent mechanical properties of these materials and improve the bearing capacity, the composite bridge deck system can be used to increase the service life of the bridge, and reduce maintenance cost CFRP-GFRP beam. Based on the finite element software, this paper analyzed mechanical property of CFRP-GFRP beam with UFC composite bridge deck system, and the axial strain distribution curve of different section forms was gotten. The result shows that this composite bridge deck system can utilize both tensile strength of CFRP and GFRP and compressive strength of steel fiber reinforced concrete, and the finite element analysis result is consistent with the experimental results. The conclusion provides a reference for the application and research of the composite bridge deck system.