论文部分内容阅读
考虑工程中RC桥梁存在二次受力的情况以及钢板与混凝土之间的协同工作系数,同时引入改进的坑蚀模型,建立了钢板加固锈蚀RC梁抗弯刚度理论模型。通过9根钢板加固锈蚀RC梁抗弯弹性试验验证了理论模型的正确性,对比了考虑二次受力和不考虑二次受力状态下试验梁的刚度。结果表明,二次受力状态下挠度理论值与试验值比值的均值和变异系数分别为1.02和0.13,理论推导的数值与试验值较为吻合。钢板加固能够有效提升锈蚀RC梁的抗弯刚度,不考虑二次受力的试验梁刚度被高估了,而不考虑钢板与混凝土间变形协调的试验梁刚度被低估了。
Considering the secondary load of the RC bridge in the project, and the synergistic coefficient of work between the steel plate and the concrete, a theoretical model of bending stiffness of the steel plate reinforced corroded RC beam is established by introducing an improved pitting corrosion model. The experimental results show that the theoretical model is validated by using 9 steel plates to reinforce the RC beam flexural elasticity test. The stiffness of the test beam under secondary stress is compared with that without considering the secondary load. The results show that the mean value and the coefficient of variation of the ratio of the theoretical deflection to the experimental value under the second force are 1.02 and 0.13, respectively. The theoretical deduced values are in good agreement with the experimental values. The steel plate reinforcement can effectively improve the flexural rigidity of the corroded RC beam. The rigidity of the test beam without considering the secondary force is overestimated, and the rigidity of the test beam which is not coordinated with the deformation between the steel plate and the concrete is underestimated.