纤维增强聚合物加固带裂缝圆截面木梁的弯曲

doi:10.3969/j.issn.1007-2861.2013.07.011

Abstract

Abstract: The reinforcement effect of the fiber reinforced polymer (FRP) sheet bonding on the whole surface of a circular cross-section timber beam on the bending of timber beam with longitudinal through split is investigated. The governing equation for bending deformation of the circular timber beam with longitudinal split strengthened FRP sheet is established. The bending behavior of the FRP-strengthened circular timber beam under a concentrated load at its free end is studied. An analytical solution is obtained. Influences of the modulus and thickness of the FRP-sheet, slenderness ratio and split width of the timber beam, etc., on the bending behavior of the timber beam are analyzed. Numerical results show that the deflection of the FRP-strengthened circular timber beam at its free end is decreased with the increasing thickness, elastic and shear modulus of FRP sheet. When the modulus and thickness of the FRP sheet reach a certain values, the reinforcement effect is not obvious for continuing increase of the thickness and elastic modulus of the PRP sheet. Furthermore, the shear modulus of the FRP sheet has clear influence on the deflection of the short timber beam. The influence of beam’s split can be eliminated completely by the carbon FRP reinforcement when the shear modulus of the FRP sheet is large.

Key words: analytic solution, bending deformation, circular cross-section timber beam with split, reinforcement and rehabilitation, fiber reinforced polymer

CLC Number:

OUYANG Yu, FAN Lei-qin. Bending of Split Circular Timber Beam Strengthened with Fiber Reinforced Polymer[J]. Journal of Shanghai University（Natural Science Edition）, 2014, 20(3): 385-396.

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Bending of Split Circular Timber Beam Strengthened with Fiber Reinforced Polymer

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