胶层厚度对梁底粘钢加固的剥离影响仿真研究

Simulation Research of Rubber Thickness's Stripping Effect on Beam Bottom Stick Steel Strengthening

为研究粘钢法加固胶层厚度对钢板剥离的影响,本文针对梁底粘钢板加固混凝土梁正截面,建立了同一钢筋混凝土梁用不同胶层厚度粘贴相同钢板的有限元模型,进行了仿真分析。通过对胶层和混凝土粘贴界面的应力场分析,发现胶层厚度对胶层端部的应力集中有影响,对界面胶层中间区域应力无影响,说明胶层厚度对钢板的端部剥离有一定的影响。

Various finite element models are constructed to study the effects of adhesive sticky thickness of reinforced layer on steel plate peeling in bonding steel method. Focusing on orthogonal cross sections of sticky steel reinforced concrete beams, the simulation analysis are conducted on models of the same concrete beam with different adhesive thickness layers respectively. Through stress field analysis on interfaces of the pasting layer and concrete, several research consequences are revealed： adhesive layer thickness could affect the concentrated stress in the adhesive bounds significantly, while there seems no change in the middle region, which declares the differences of layer thickness could impact steel peeling at the ends of steel plates to some extent.