Fiber Reinforced Concrete Crack Performance Test Research And Analysis

Concrete is the main building material in the construction market, which has a strong overall, good mold, low construction cost, easy maintenance, durability, and other advantages. However, the performance of concrete as a construction material has some defects, crack-resistant performance is one of its main weaknesses, how to improve the concrete cracking resistance performance of works significant.This thesis primarily through the plate early plastic shrinkage testing, plain concrete, steel fibre reinforced concrete, fiber reinforced concrete and steel-polyacrylonitrile concrete fiber early experimental study on plastic shrinkage cracking of concrete to explore the effect of fiber on the crack resistance of the concrete matrix. Containing randomly distributed through an ANSYS fiber model simulation and analysis of the different content on different lengths of concrete cube strength enhancing effect. Final through a containing fiber shear wall model simulation of fiber concrete in practical engineering component stress crack resistance and performance enhancement. Main conclusions are as follows:(1) In the plate cracking test, by comparing the effect of concrete of steel fiber reinforced concrete, polyacrylonitrile fiber reinforced concrete, steel-pan of hybrid fiber concrete plastic shrinkage cracking of early discovered steel-pan the best crack resistance of hybrid fiber concrete.(2) By establishing a network of fibers randomly distributed in the ANSYS simulation of cube models come to its stress-strain curve by curve analysis to some extent different fibre lengths and spacing different fiber on properties of concrete matrix enhancement. Analysis by cloud cube model shear stress fibers critical spacing and length of critical concepts.(3) Explores the critical spacing of dimensional analysis, by a fixed length of fibers in the flat model analysis under different spacing of the best fiber spacing.(4) By establishing different levels of fiber in the ANSYS shear wall model, analysis of fiber reinforced concrete in a real state of stress in engineering components, draw the shear walls cracking load, yielding load and ultimate load increase with the improvement of steel fiber volume ratio, ultimate displacement has been increased.Finally, summarized the main contents of this article and the resulting conclusions and explained the shortcomings of this study.