Seismic Importance Research Of Masonry Structure Wall Based On Static And Dynamic Elastic-Plastic Analysis And Application In Seismic Appraisal

As a result of the randomness of horizontal seismic effect, the variation of the masonry structure attributes and the complexity of the stress mechanism in masonry structure wall, the current study methods of component importance are still unreasonable. In this dissertation, the static and dynamic elastic-plastic analysis methods are used for the research on the importance of masonry structure wall under horizontal seismic action. The main research contents and results are presented as follows:Firstly, according to the allocation model of horizontal seismic action in structure system, this dissertation proposed two wall anti-seismic importance of quantitative calculation methods. One is based on structure property without external load, another is based on static and dynamic elastic-plastic analysis. By virtue of the analysis results of the finite element models, this dissertation drew a conclusion that the compressive importance of the wall is consistent gradually increases frome up to bottom in the vertical direction of masonry structure, but shearing importance doesn’t meet this rule. In comparision with the merits and demerits of this two methods, the first method does not have high accuracy, and cannot reflect the difference of the anti-seismic importance among wall which are located in the same floor and have the same lateral stiffness. For which the second method is superior to the first one.Secondly, this dissertation carried out some researches on the importance impact factors which included the horizontal seismic action intensity, remarkable period and duration time, and found the wall importance difference between two walls which are under the conditions of different ground motion, taking advantage of the static elastic-plastic and dynamic elastic-plastic analysis methods.Thirdly, this dissertation studied the influence of the structure properties factors that contained geometric properties, constructional column and ring beam on the wall anti-seismic importance and the anti-seismic ability of the masonry structure, and obtained some variation characteristics of the wall anti-seismic importance.In summary, the importance analysis methods In this dissertation is applicable to different characteristics of ground motions and the various stages of the structure the performance, and can provide some references to structural design and reinforcement.