Experimental Study Of Wood Beams Strengthening With Slap Tenon Joint By FRP

Ancient garden architecture has a long history. Due to various reasons, these ancient buildings exist the phenomenon that "a small repair each three years, and an overhaul each five years". As one of the most important elements of ancient buildings, wooden beams often bend, crack, fracture, rotten decay and so on. This paper proposed a method of damaged wooden beams reinforced by FRP, and executed experimental analysis and research.First, the paper expounded the material test of wood and FRP. Reference to national standards, produced 236 groups of standard samples, obtained the standard strength for compression strength, tensile strength, flexural strength, shear strength and so on. And also had acquired these standard strength for FRP.In addition, the paper introduced the flexural strength test on the mid-span of beams reinforced by FRP. It produced 11 specimens that had considered the factors of different reinforcement rations, different materials, different wood species and so forth. By experiment, to study the flexural properties of pre-damaged wood beams strengthened, included failure characteristics, limit bearing capacity, deformation and so forth. The results showed that, the flexural strength of the slap tenon spliced beams strengthened by FRP could be rehabilitated like unbroken wood and even exceeded. According to the result of the experiment, the paper also proposed a practical method to calculate the ultimate moment bearing capacities of the slap tenon splicing beams. The calculation result is consistent with the experimental data and could be consulted by engineering practice.At last, this paper has also explained the shear tests of the slap tenon splicing beams strengthened by FRP. It produced 7 pieces of spliced wooden beams and 1 whole beam (contrast group) that considering different reinforcement rations, different forms of beam-head, different beam leader length and other factors, by experiment, to study the shear behavior of spliced wooden beams contains failure characteristics, limit bearing capacity and other factors. The results showed that:the shear strength for spliced wooden beams strengthened by FRP could be rehabilitated like unbroken wood and even exceeded. Based on the test results, this paper also presented a formula of beam-head section that contained the certain instruction significance for the actual project.