The Reliability Analysis Of Reinforced Concrete Structure Under The Injury Cases

In recent years, the structure of reinforced concrete structures in the damage case reliability of a large number of experimental and theoretical research, and more research. Based on MATLAB software,in this paper, through the study of reinforced concrete structures in reinforced concrete structures is based on the change of the element stiffness damage the normal limits of the deflection reliability variation. Then guide structure reinforcement and repair.In this paper, the reliability of the reinforced concrete structure in the case of changes in the element stiffness damage variation. By theoretical analysis, the following conclusions:(1) The same unit in the different degree of stiffness damage, a reliable indicator of the element stiffness greater the damage simply supported beam is smaller, the probability of failure increases. A reliable indicator of the different units in the same stiffness degree of injury, more close to the the cross element stiffness damage caused by the Charpy normal limit is smaller, the greater the probability of failure.(2) In the same degree of injury, the number of units from damage to a small number of units to damage caused by Charpy a reliable indicator of decreased gradually increasing the probability of failure.(3) As the beam element stiffness damage from small to large changes in the process, a reliable indicator of the reinforced concrete portal frame gradually decreased the probability of failure increases gradually. When the beam element stiffness damage value of0.5, we should take measures to reinforce measures to improve the reliability of the frame structure.(4) The response surface method and direct MC method for structural reliability size error, response surface method and direct MC calculation results mostly in the relative error less than0.05.The response surface method can meet the actual needs of the project.