Research On Flexural Performance Of Basalt Reinforced Concrete Beams Based On Bamboo Fiber And Steel Wire Mesh Reinforcement

By consulting relevant experimental research data,it is found that the new material of fiber reinforced steel mesh concrete combines the advantages of fiber concrete and steel mesh concrete,and it has better tensile strength,crack resistance,ductility and toughness.Performance.For the research on the performance of fiber reinforced steel mesh concrete,the current research in our country is not mature,especially the theoretical aspect needs to be further deepened.At the same time,compared with ordinary steel bars,basalt fiber reinforcement has a very low elastic modulus.Therefore,although this new material is very environmentally friendly,it is not suitable to be used alone in beam structures due to its own characteristics.Because of this,it is of great research significance to optimize the related performance of basalt reinforced concrete beams referred to as BFRP reinforced concrete beams)by applying fibers and steel mesh.This article focuses on the flexural performance of basalt reinforced concrete beams reinforced by bamboo fibers and steel mesh.A large number of scholars have discovered that the length of fiber and the range of wire mesh layout have a very important impact on it.Therefore,in view of these two variables,seven basalt reinforced concrete beams based on bamboo fiber and steel wire mesh were designed and fabricated.Among them,the length of bamboo fiber is 30 mm and40mm,and the steel wire mesh is arranged between 1/2 times the maximum bending moment point and the full beam section.The main research contents and results are as follows:(1)In the test,it is found that when the BFRP tendons and beams are damaged,large deformation will occur,and the ductile failure is very obvious.The incorporation of bamboo fiber and steel mesh can effectively enhance the tensile strength of concrete and prevent the occurrence and development of concrete cracks.This is because after the crack occurs,the bamboo fiber and the steel mesh at the crack section and the longitudinal tension BFRP The tendons share the tensile stress.At the same time,due to the wrapping effect of the steel wire mesh,the overall rigidity of such beams is improved,and the cracking load and ultimate bearing capacity of the beam are effectively enhanced,and the deflection of the beam under the same load is significantly reduced,which also guarantees The normal use of this type of beam has expanded its application in practical engineering..(2)Combined with the test results and existing data at home and abroad,the main influencing factors of crack width and development of BFRP reinforced concrete beams reinforced with bamboo fiber and steel wire mesh were analyzed,and BFRP reinforced concrete reinforced with bamboo fiber and steel wire mesh was proposed The calculation method of the bending moment of the normal section of the beam and the calculation formula of the maximum crack width.(3)The key influencing factors of the normal section ultimate bearing capacity of BFRP reinforced concrete beams reinforced with bamboo fiber and steel wire mesh are discussed,and the calculation method of the normal section ultimate bearing capacity of BFRP reinforced concrete beams reinforced with bamboo fiber and steel wire mesh is established,and It is checked by experimental data that the theoretical value is in good agreement with the experimental value.