摘要
通过对8个钢板局部屈曲受压试件进行轴压及偏压试验,观测了梁侧锚固钢板加固钢筋混凝土梁(BSP梁)中梁侧锚固钢板在不均匀压应力场下的局部屈曲模态,研究了钢板屈曲应力场分布、屈曲承载力、竖向变形能力及屈曲起拱高度随不同螺栓间距、钢板厚度及纵横向加劲肋配置方式的改变规律.试验结果表明:梁侧锚固钢板的屈曲承载力随螺栓间距的减小及钢板厚度的增加而增大,采用减小螺栓间距为更经济有效的方法;配置纵向加劲肋能更有效地改善钢板的屈曲承载力,改善效果随加劲肋截面尺寸的增大而提高;在纵向加劲肋的基础上再配置横向加劲肋对改善抗屈曲性能无明显效果.
Eight local buckling push test specimens for the steel plates in bolted-side-plated （BSP） beams were fabricated and tested under concentric or eccentric loading conditions. The variation of the local buckling stress field, the ultimate buckling strength, the longitudinal deformability and the transverse buckling deformation of the bolted steel plates as the difference in bolt spacing, plate thick- ness, and the arrangement of longitudinal and transverse stiffeners were investigated. Test results in- dicate that the buckling strength increases as the increase of plate thickness and the decrease of bolt spacing, and using smaller bolt spacing is a preferable measure to improve the buckling strength. The utilization of longitudinal stiffeners can increase the buckling strength significantly and greater section dimension shows greater performance. However, the transverse stiffener shows no visible beneficial effect.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第10期41-46,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51408436)
关键词
钢筋混凝土
梁侧锚固钢板
加固
局部屈曲
加劲肋
reinforced concrete
bolted side-plating
strengthening
local buckling
stiffener
