Reliability Analysis Of Reinforced Concrete Beams Strengthened With Steel Plates With Composite Stiffness

City urbanization with the diversity of life,It is difficult to meet a variety of functional requirements for a single building use function,change the existing building use function will inevitably lead to the change of the load and resistance of building structure.In this case,it is likely to reduce the reliability of the structure,the lack of security reserves,to bring great security risks.Therefore reinforcement method has become the key to solve these problems of building structureIn many reinforcement methods,the application of bonded steel reinforcement is more extensive.In order to study the effect of sticking steel reinforcement method on structure,this four story brick concrete structure teaching building of a university in Guangxi as the research object,according to the test site before reinforcement,the reinforcement scheme of sticking steel take appropriate,based on the reliability theory,the statistical parameters according to the national standards to provide,on the structure component the reliability analysis and calculation.Through the research and analysis of this paper,it can provide the basis for the reliability calculation of the steel bonded reinforcement.The composite stiffness of the steel reinforced members has a significant effect on the change of the stress,the deformation degree and the tendency of the structure,and the development of the crack.Therefore,the variation law of the stiffness of the steel reinforced member is obtained,and the stress form of the structure can be obtained more accurately.In the practical engineering calculation,the concrete structure design code provides an empirical formula for calculating the RC beam.If the formula is used to calculate the deflection value of the reinforced concrete beam strengthened by sticking steel,there will be some errors.Some scholars on the basis of RC beam stiffness formula and modified,so the calculated results can basically meet the engineering needs.The disadvantage is that the modified formula is reflected in the more steel materials on the effect of the beam,the common function of the overall effect is not to bring the effect of plate beam generated results with the actual situation,there are still differences.In addition,the traditional static load test to test the long-term stiffness of the RC beam strengthened with steel plate has many inconveniences.In order to get more accurate stiffness of RC beam with the load variation,based on the basis of previous studies,combined with the theoretical formula calculation by the finite element software,established by components of the composite stiffness,and provides a new idea for solving complex.