The Overall Seismic Capacity Of Prefabricated House Roof On Available Masonry Structure

With the rapid development of building industry,the standard of earthquake resistance becomes much stricter.Especially the buildings built in the early years can not meet the latest requirements,and the properties gradually fade away under the long-term use and natural environment.So we must scientifically evaluate the extent of the structural damage and the objective law,and take effective measures to keep the structure safe.Therefore,aseismic strengthening of buildings is Extremely essential.Currently,the reinforcement methods of building structures mainly include wrapped Steel strengthening method,section enlargement method,prestressing reinforcement method,additional protection reinforcement method,FRP sheet reinforcement method and steel-bonded reinforcement method,etc.All of the reinforce-ment methods direct at the inadequate bearing capacity of structure.Masonry structure building uses precast concrete hollow slab structure,the most damage of floor which was destructed during the earthquake is not due to inadequate bearing capacity of the floor,but floor cracking even fall off as a result of inadequate overall performance of buildings.In the face of this situation,the paper puts forward a kind of floor plate reinforcement method in order to improve the ability of the floor plane to resist earthquake.The quality of floor is assumed that focuses on each floor elevation,together with the half of the upper and lower quality of wall tube into a particle and is assumed to be a degree of freedom.This paper only consider the basic mode of Masonry structure.Therefore,we can adopt the base shear method to distribute seismic action according to inverted triangle and to calculate the steel according to the reinforcing use in the seismic intensity zone.We use finite element software ABAQUS to simulate and analyze,and compare strengthened model with unstrengthened model to verify the validity of the earthquake resistance of the reinforcement method.Meanwhile,through the simulation and analysis of the earthquake resistance for the same model with different earthquake loads,we verify the validity of the method presented in this thesis and provide a theoretical basis for engineering practice.After simulation we find that almost no strengthened component damaged under the earthquake with the seismic fortification intensity.So this method can play a more powerful force after refinement.Its performance needs to be further research later,and it is a kind of very promising reinforcement techniques.It is concluded that the data accurate and reliable numerical simulation method,After improved it can be widely applied to reinforcing reform in the future,and it is a kind of convenient construction,safe operation,and reliable methods.We believe that,in time,this method must lead the reinforce industry,contributing to social improvement and human development.