论文部分内容阅读
为了探究表面内嵌玻璃纤维增强材料(GFRP)加固混凝土的抗弯性能,通过对表面内嵌GFRP筋加固混凝土梁试件的抗弯试验,探究了加固梁受力过程和破坏形式;通过对加固试件与未加固试件的荷载-位移关系曲线和荷载-应变关系曲线的对比分析;探讨典型试件裂缝的开展和分布规律,进一步研究原梁内纵向钢筋配筋率和GFRP筋加固量对梁抗弯性能的影响。试验研究结果表明,表面内嵌GFRP筋加固方法不仅不同程度地提高了试件的屈服荷载和极限荷载,而且也提高了梁屈服阶段和破坏阶段的截面刚度,并在限制裂缝开展方面起到了一定有利的作用。
In order to investigate the flexural behavior of concrete strengthened with GFRP, the bending process of concrete beams strengthened with GFRP tendons is studied, and the stress and failure modes of the strengthened beams are explored. And the unrestrained specimen load-displacement relationship curve and load-strain curve of comparative analysis; to explore the crack initiation and distribution of the typical specimen, to further study the original beam longitudinal reinforcement and GFRP tendons beam reinforcement on the beam bending performance Impact. The experimental results show that the GFRP tendon reinforcement method not only improves the yield load and ultimate load of the specimens to varying degrees, but also increases the cross-section stiffness of the beam in yielding and failure stages and plays a certain role in limiting the crack initiation Beneficial effect.