Irregular Structure Analysis Of The Base Isolation Studies

Base isolation technique is currently the world's more mature a damping control technology,both at home and abroad have a wide range of research on base isolation,but research on base isolation structure torsion effect still need to deepen,especially for irregular structures.So the facade of irregular cases of irregular basic rules and basic structure under seismic action of the influence of the torsional response has an important value.This article on the basis of the theoretical research of base isolation model is set up,respectively to study the above problems,and select a project example practice analysis.Using sap2000 opposite based rules and irregular cases based irregular structure underseismic action of torsion effect analysis,draw the conclusion.This paper first introduces the vibration analysis model of the structure,this paper introduces the basic rules of the facade irregular structure and irregular facade irregular vibration analysis model of structural dynamic analysis,and the paper adopted by the seismic wave is determined.The analysis of structure vibration analysis model,this paper USES is hefei L an engineering example the reinforced concrete two-way eccentric structure,thus using the asymmetric power behind the analysis of the vibration analysis of the translation-torsion coupling vibration dynamic analysis.Set up two models,this paper compared the basis of analyzing the l-shaped facade irregular cases based irregular structure under seismic action rules and the influence of torsion effect,and the analysis of the structure the center of mass of floor and just heart position,and in reference to previous scholars twist factor analysis under the premise of research for L two-way eccentric structure in high-level internal layout mutation of structure under the condition of the influence of torsion effect.We used in the study of two-way eccentric irregular structure of two kinds of base isolation structure comparison,and analysis of two kinds of model data,the results we found that the elevation of irregular cases torsion effect of the structure of the basic rules of the upper structure will be affected by the isolation layer stiffness eccentricity,reduced when the isolation layer stiffness eccentricity,the structure of the torsion effect also corresponding reduced;For facade irregular cases of irregular structure,floors just to the location of the heart and center of mass of mutation place can also cause the structure of the reverse effect of mutation;Under the two models contrast,basic rules,eccentricity of isolation layer is very small,but from the resultsof torsional angular acceleration and displacement of the structure of get basic rules should also consider the torsion effect of floor.This research breakthrough point and innovations of the two models and comparison research of isolation layer and floor change each layer of eccentricity will affect the torsion effect.According to the former analysis,this paper increases the effect of the change of the stiffness of the isolation layer on the structural torsion.Therefore,after the study of this paper,we consider the eccentric ratio of the isolation layer in the face of the torsional effect analysis of the irregular structure,and the effect of the eccentric distance of the mass eccentricity should be considered.Through the research of this paper,we have a deeper understanding of the factors which have the reverse effect of the structure and how we can avoid it in the practical engineering application.