Study On Influence Of Damping Infill Wall On Seismic Performance Of Reinforced Concrete Frame Structures

The research shows that the reinforced concrete frame structure often has a lot of damage or collapse of the infill wall in previous earthquakes.The failure characteristics of the infill wall are generally brittle failure,which has a great influence on the reinforced concrete frame structure.How to improve the ordinary infill wall in reinforced concrete The seismic performance in the frame structure becomes a difficult point.The damped infill wall uses the shear hysteresis deformation of its damping layer to dissipate the seismic energy of the input structure,which is a new means to improve the seismic performance of the frame structure.However,there are few studies on the seismic performance of the reinforced concrete frame structure with damped infill walls.Therefore,based on the existing research,this paper studies the effects of different factors on the seismic behavior of reinforced concrete frame structures with threedimensional damped infill walls and reinforced concrete frame structures with threedimensional damped infill walls.The main research results are as follows:(1)The calculation models of the infill wall frame structure in the existing literature are compared,the characteristics and application scope of each calculation model are summarized,and the structural calculation model suitable for this paper is selected.According to the existing experiments,the finite element model is built by using the micro-calculation model suitable for this paper,and the test results are checked to verify the rationality of the model.(2)Under the action of monotonic load,the influence of different damping layer thickness and damping layer elastic modulus on the mechanical behavior of reinforced concrete frame structure with damped filling wall is studied.Under the action of reciprocating loading,the influence of different factors on the mechanical behavior of the reinforced concrete frame structure with damped infilled wall is studied.The calculated hysteresis curve,skeleton curve and stiffness degradation curve are used to obtain different factors for the reinforced concrete wall.Influence law of hysteretic behavior of concrete frame structure.(3)The dynamic characteristics of three-dimensional reinforced concrete frame structure with damped infilled walls are studied.The characteristics of vibration mode and natural vibration period of reinforced concrete frame structure with damped infilled walls are obtained.The seismic response of three-dimensional reinforced concrete frame structure with damped infilled walls is studied under the action of multiple earthquakes.By analyzing the displacement response and structural internal force of each model under the action of multiple earthquakes,the influence of different layouts and different filling conditions on the seismic behavior of reinforced concrete frame structures with damped infilled walls is obtained.(4)Under the rare earthquake,the response of the three-dimensional reinforced concrete frame structure of the damped infilled wall is studied,and its response characteristics are obtained.By analyzing the apex displacement time history,floor interlayer displacement and acceleration response of the structure,the influence law of different layout and different filling conditions on the seismic performance of reinforced concrete frame structure with damped infilled walls is obtained.