Experimental And Numerical Simulation Study On The Reinforcement Of Axial Compression Concrete Columns In High And Cold Regions

With the continuous development and progress of construction industry,a large number of old buildings have reached or near service years,and many buildings have not met the requirements in construction.Building reinforcement and reinforcement of these buildings has become an inevitable need of building structure reinforcement and repairing has accounted for more than half of the total consumption of the construction industry,but for now,the section enlargement of the concrete structure is very few,and most of these studies are using ordinary concrete reinforcement under normal temperature therefore,considering the high fluidity concrete(Self Compacting Concrete referred to as SCC)is a special process of improving the traditional reinforcement method and construction in special environment.This paper mainly adopts the experimental analysis of strengthening environmental temperature,pouring temperature and outsourcing SCC reinforced with SCC strength and insulation board thickness affects the strengthening effect of reinforcement of the second Xining area were analyzed using self compacting concrete reinforcement concrete early elastic modulus and strength changes in outdoor natural environment maintenance finally;by using the ANSYS finite element analysis software to establish the model of reinforcement at a temperature of 20℃,by comparing the experimental results and numerical simulation results of the numerical analysis and reinforcement model to obtain the reliable parameters.The main conclusions are as follows: strengthening the ultimate bearing capacity of a gradual increase trend with outsourcing SCC strength and the pouring temperature increases,and when the outsourcing intensity of SCC than the original concrete strength of a high strength,improve the most significant final ultimate bearing capacity after reinforcement;when the ambient temperature at-15℃,strengthening effect the reinforcement produced by using 5cm foam glass insulation board for external insulation the reinforcement effect compared with 3cm foam glass insulation board is more significant,it can achieve the desired effect of heat preservation;different strength of self compacting concrete in two kinds of elastic modulus and axial curing conditions under different compressive strength decreased with age change rule.