| The infill wall-frame structure thus has a flexible layout and is easy to form a large space,and is widely used in large public places.Because of the coupling between the wall and the main body of the frame,the two are closely connected and interact with each other.However,in actual engineering,only the calculation of the structural cycle reflects the effect of the layout of the wall on the structure.Taking into account that the wall early in the earthquake when the cracks occur and consume part of the seismic energy,but in the analysis of the structure of the force situation,still in accordance with the size of the frame structure members to allocate,do not fully consider the wall of the structure of the carrying capacity The effect of this and the contribution of the lateral stiffness of the wall itself to the structural stiffness is not safe.Judging from the actual earthquake damage situation,many such structures do not have the “strong column weak beam” mechanism,but are often destroyed in the form of “strong beam weak columns”.At the same time,the material properties of the wall are different,and the structure is damaged.The severity is not the same.It can be seen that the material properties and layout of the wall will have a great impact on the seismic performance of the frame structure.Under the effect of horizontal seismic loading,the stiffness effect of the wall on the frame structure cannot be ignored.The main research work done in this paper is as follows:(1)Explained the interactions and mutual influences between the wallbody and the frame body under horizontal seismic load,including the properties of the wall body for the frame body in terms of resistance to lateral stiffness,bearing capacity,deformation properties,absorption of seismic energy,etc.The favorable influence,as well as some adverse effects,and from another aspect elaborated that the framework constrains the deformation of the wall to some extent.(2)Select a simplified model that reflects the actual situation to accurately reflect the material properties of the wall and the vertical layout of the structure of the impact of the framework,but also in order to meet the actual situation,through the analysis of the form of wall failure,Finally,the diagonal struts with the same thickness and width as the wall are used to replace the infill wall,and the frame body is hinged to resist lateral forces.(3)This paper fully considers the material properties of the wall and its vertical layout form,through the establishment of a pure frame model,a frame structure model filled with brick infill walls,a frame structure model filled with masonry infill walls,and a brick infill wall— Frame structure model(first floor large space),masonry infill wall-frame structure model(first floor large space),brick infill wall-frame structure model(middle floor large space),masonry infill wall-frame structure model(middle layer Large space),brick-filled wall-frame structure model(top floor large space),masonry infill wall-frame structure model(top floor large space),using Sap2000 software for calculation and analysis,to obtain the maximum floor displacement,basement corresponding to the performance point Shear force and apex displacement were calculated and the displacements between layers and displacement angles between layers were obtained.The comparison of these three aspects resulted in the effects of different wall materials and vertical layout on the seismic performance of the structure.(4)The contribution of the existence of the wall to the lateral stiffness ofthe structure was analyzed,and the influence of the size and position of the door and window opening on the contribution rate of the stiffness was analyzed.(5)According to the conclusions drawn from the above analysis and research,combined with relevant regulations,seismic design recommendations are given. |
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