Research On The Mechanical Behavior Of Masonry Infilled Wall With Opening Under Out-of-plane Loading

Infilled frame structures widely used in our society because the structure has the advantages of convenient construction, low cost and flexibility in architectural planning.Researchers has made a lot of achievements for the study of influence of infilled wall on the frame structure under in-plane loads. In contrast, the mechanical performance of infilled walls on frame structure under out-plane is still quite scarce. Infilled wall is most likely to damage in the earthquake, the destruction causes is often due to the interaction of both in-plane and out-plane loads. How to ensure the infilled wall under out-plane loads can have enough endurance is our current social problems to be solved, which is closely related to people's life and property safety. However, in the actual structure, people often open holes in the wall to meet the use demand. Therefore, the research of mechanical performance of infilled walls with openings under out-plane loads has important theoretical significance. this paper based on the structure of the infilled wall with the existing research results, using ANSYS software to research the infill frame structure with opening that including following aspects:The test structure of the model and the data is verified by using numerical simulation ANSYS Software, Comparison of the two results, it was found that the simulation results fit well with the experimental data obtained. This shows that the analysis of ANSYS software to analysis the mechanical properties of infilled frame structure under out-plane loads is reasonable and feasible.The nonlinear numerical simulation of infilled frame structure of the two story frame were establish out by using the proposed model in this paper and the effects of infilled with opening on frame structure plane under the out-plane low cyclic loads is analysis. At the same time, the changes of infilled openings of position and size have influence on the frame structure of infilled is studied. The results show that the presence of the entrance of the opening reduces the bearing capacity, stiffness and seismic behavior of the infilled frame structure and The opening rate is higher, the greater the amplitude reduced. When the opening size is certain, The change of the opening position has a significant effect on the mechanical performance of the whole structure. When the hole is close to the frame, the mechanical behavior of the whole structure is the worst, the hole is middle, and the hole is only biased ata distance, the mechanical performance of the whole structure is best.the change of height to thickness ratio, aspect ratio, the compressive strength of masonry and the friction coefficient of infilled wall have effect on the frame structure is researched.The two storey single span frame structure of infilled frame model in a series of four of these four parameters is established to study the influence of these parameters on the mechanical properties of infilled frame. The results show that Change the infilled wall height to thickness ratio, aspect ratio and compressive strength of masonry has significant influence on the mechanical properties of overall structure under the out-plane load, but if change the friction coefficient, it has little effect on the mechanical properties of overall structural under the out-plane load.