Study On The Anti-seismic Property Of The Existing Building With Steel Adding Layer

Currently, the steel adding layer has been important means of the old modification and anti-seismic reinforcement. Kinds of different adding structures are simulated by numerical methods, to help analyzing and comparing their difference and strength. Take a practical project as an example, six finite element models with different steel adding layers are established by using ANSYS finite element software.They are carried out static analysis and dynamic analysis respectively. Their characteristics with different adding layers are summarized through comparative analysis of numerical results. The main content studied is as follows:(1)Review the research and development status of domestic and foreign existing building with steel adding layer and sum up their advantage, necessity and basic principle. Briefly introduce the selection of steel adding layer’s plans, the basic procedure of seismic evaluation and the design and calculation theory of current popular reinforcement.(2)On two types of the plus side column and no side column, six kinds of steel adding layer, the corresponding 3D finite element model is established.the static is analyzed under different working conditions respectively, to summarize the internal force and deformation’s characteristic through their comparison.(3)Mode of vibration, structral periods, floor displacement, interlayer displacement angle and bottom shear are obtained for six structures with adding layer by using modal analysis, response spectrum analysis and time history analysis, in order to explore that different ways of steel adding layers have an influence on its dynamic characteristics, that may appear on the location of the weak stories. A schemes and measures are put forward for seismic reinforcement to improve the anti-seismic property.