Study On The Seismic Performance Of The Infilled RC Frames With Openings

Infill walls are the most common structural systems in home building systems due to their flexible layout and ease of use.As an indispensable non-structural component in the frame structure,the infill wall is widely used in practical engineering,but under the action of horizontal loads,the interaction between the infill wall and the frame structure is more complicated.Due to the needs of the building's functional use,the form of openings such as doors and windows are often required to fill the walls,making the analysis of the entire structural system under horizontal loads more complicated.So far,many researchers at home and abroad have carried out a lot of experimental research on the RC frame structure of infilled walls and have obtained many valuable research results.However,there are relatively few researches on the RC frame structure of masonry infilled walls with openings.Based on this,this article mainly carried out the following research work:1?According to the calculation method of the lateral displacement stiffness of the infill wall frame structure at home and abroad and the effect of the different opening position of the infill wall on the lateral displacement stiffness of the structure.Under the action of horizontal loads,the lateral stiffness of the single-layer infilled wall frame structure and multi-layer infilled wall frame structure under different opening positions was analyzed,and the influence of the stiffness of the infill wall on the frame structure under different openings is studied;2?By using the finite element analysis software SAP2000,a fully filled and a number of masonry filling wall frame structure models with openings are established.We're talking about the number of layers,cross-numbers,and opening rates,the effect of filling wall on seismic performance of frame structure;3?To establish the equivalent model of the brace,it is conclude that equivalent diagonal strut width expression is based on the mechanical relationship and the geometrical relationship.According to the infilled wall frame structure is transformed into equivalentconditions required for the braced frame structure as well as the equivalent principle.Using the finite element software SAP2000,a series of equivalent diagonal bracing model of masonry filling wall frame is established.This paper discusses the effect of equivalent slant width on seismic performance of masonry wall frame structure.After a lot of numerical simulation analysis,based on the principle of lateral stiffness equivalence,the relationship between the equivalent diagonal bracing width and the opening rate of the equivalent diagonal bracing model is proposed;4?Based on the relationship expression between the equivalent diagonal brace width reduction coefficient and the hole rate of the equivalent diagonal brace model of the middle open-hole masonry filling wall framework.It establish five-layer masonry filling wall frame structure model with different hole rate and a pure frame structure model,this paper established the five layers framework with different opening rate and the pure frame structure,and the Pushover analysis is carried out on the models.Through the analysis of each model through the analysis of each model,it is conclude that that self-vibration period,internal force and displacement of the structure of masonry filled wall with holes in the middle are affected by various aspects such as vibration period,internal force and displacement of the frame structure,and the results of the analysis of the model are corresponding to the current specifications.