不同钢板加固方式下的锈蚀RC梁试验研究与有限元分析  

EXPERIMENTAL STUDY AND FINITE ELEMENT ANALYSIS OF CORRODED RC BEAMS UNDER DIFFERENT STEEL PLATE REINFORCEMENT METHODS

作　　者：郭诗惠[1] 张谦 唐皇 GUO Shi-hui;ZHANG Qian;TANG Huang(School of Civil Engineering,Nanyang Institute of Technology,Nanyang 473004,China;School of Civil Engineering,Hunan City University,Yiyang 413002,China)

机构地区：[1]南阳理工学院土木工程学院,河南南阳473004 [2]湖南城市学院土木工程学院,湖南益阳413002

出　　处：《南阳理工学院学报》2024年第6期82-88,共7页Journal of Nanyang Institute of Technology

摘　　要：通过对6片RC梁的试验研究,分析了钢板抗弯加固和抗弯抗剪组合加固锈蚀梁的承载性能,并且对试验梁进行了有限元模拟分析。研究结果表明:不同的加固方式会导致不同的破坏模式;钢板抗弯加固能够有效地提高锈蚀梁的极限承载力,组合加固提高的效应最明显;抗弯加固后锈蚀梁的延性较锈蚀对比梁均有所提高,最大提高幅度为11.19%。组合加固后锈蚀梁的延性却降低了30.94%;抗弯加固梁的刚度随钢板厚度增加而增大,组合加固最有效地提高了锈蚀梁刚度。试件的有限元分析结果表明抗弯加固钢板厚度不应超过4 mm,组合加固梁底部钢板厚度3 mm和2 mm厚的U形箍组合效果最优。In this paper,based on the experimental study of 6 RC beams,the load-bearing properties of steel plate and the combination of flexural and shear reinforcement corroded beams are analyzed,and the test beams are simulated by finite element method.The results show that different reinforcement methods lead to different failure modes;Steel plate bending reinforcement can effectively improve the ultimate bearing capacity of corroded beams,and the effect of combination reinforcement is the most obvious.The ductility of corroded beams after flexural reinforcement is higher than that of corroded beams,and the maximum increase is 11.19%.After combination reinforcement,the ductility of corroded beams decreases by 30.94%.The stiffness of the stiffened beam increases with the increase of the thickness of the steel plate,and the stiffening combination is the most effective way to improve the stiffness of the corroded beam.The finite element analysis results of the specimens studied in this paper show that the thickness of the flexural reinforced steel plate should not exceed 4mm,and the combined effect of the U-shaped hoop with the thickness of the steel plate at the bottom of the combined reinforced beam is the best.

关 键 词：钢板加固 锈蚀RC梁 试验研究 有限元分析 

分 类 号：U447[建筑科学—桥梁与隧道工程]