Analysis of interfacial shear stresses in beams strengthened with bonded prestressed laminates

作者：Al Emrani M^*; Kliger R

来源：Composites Part B: Engineering , 2006, 37(4-5): 265-272.

DOI：10.1016/j.compositesb.2006.01.004

• analytical modeling
• laminates
• stress transfer
• finite element analysis

In this paper, the problem of interfacial shear stresses in beams strengthened with bonded prestressed composite laminates is analyzed using linear elastic theory. The analysis provided a closed-form formula for calculating the critical maximum shear stress at the end of the laminate for a beam with arbitrary cross-section and material. A demonstration study on strengthening an existing steel bridge using this technique has also been conducted using FE-analysis. The results from both analyses agreed very well. Also, a parametric study is performed in order to identify the effects of various geometrical and material properties on the magnitude of interfacial shear stresses. The results show that there exists a high concentration of shear stresses at the ends of the laminate, which might result in a premature failure of the strengthening scheme at these locations. Material properties such as laminate and adhesive stiffness and the dimensions of the laminate were all found to have a marked effect on the magnitude of maximum shear stress in the composite member.

• 出版日期2006