Experimental Study And Finite Element Analysis Of RC Beams Strengthened With Stainless Wire Mesh And Permeability Polymer Mortar

Because of structural damages caused by natural disasters, the qualities of buildings, declining of buildings' performance, the buildings' reliability are gradually reduced when used. So it has important society significance to maintain, strengthen, and rehabilitee the buildings for the purpose of keeping their serviceability and extending their service life. Strengthening industry has many advantages, such as low investment, saving buildings' space and short time for strengthening. So it has prominent benefits of economy and society. There are many means to strengthen buildings. In this article, we introduce a new type of strengthening technology which is called rehabilitation with stainless steel wire mesh and permeability polymer mortar. The new rehabilitation technology possesses advantages of fire-resistance, high temperature-resistance, corrupt-protection, high-strength, etc, which have widely application market.The experiments on the flexural behavior of reinforced concrete rectangle-beams strengthened by stainless steel wire mesh and permeability polymer mortar are performed in this article. We designed four beams, one beam for contrast, and the remaining three beams for strengthening. There are two beams strengthened when load exists on the beams, also the other beam strengthened when uninstall the load on the beam to zero. The test results show that the rehabilitation greatly improved the flexural behavior of reinforced concrete rectangle-beams, reduced the deflection of beams, the width and spacing of crack which show that the stiffness of beams were enhanced. Also the lag strain of stainless wire mesh was bigger when there existed load strengthened for the strength of stainless wire mesh were not used fully. That caused the capacity of beams strengthened when load exists is lower than the beam strengthened when no load exists.Based on the strain compatibility, we study the analysis for the flexural behavior of beams strengthened by stainless wire mesh contacting with the design methods for the general reinforced concrete rectangle-beams. And we propose the methods and formula for calculating the capacity of beams strengthened by stainless wire mesh in the first force mode. Also we investigate the capacity formula of beams strengthened considering the lag-strain in the second force mode. Contrast the analysis results with experiments results, it's perfect. At the same time, we advance the formulas to calculate the limited amount of stainless steel wire mesh.Finally, we simulate the process of the beams strengthened and the beam for contrast using the ANSYS finite element program, the results are satisfied contrasted with the experiment results.