Analysis of the Free Surface Response Spectrum Of Building Structures

Abstract The structural integrity analysis of buildings under earthquake events and the discussion of the structural safety of free‐standing facilities under actual earthquake action are to study the mechanical performance and damage mechanism of free‐face building structures under earthquake loads, combined with the characteristics of foundation soil. Besides the static loads points, the dynamic loads generated by the interaction between the foundation slab and the area of the facility under seismic action must be considered in the analysis of the soil dynamic properties of the foundation slab and the adjacent area of the building structure. Verify the building structure could withstand the design earthquake must actual seismic response spectrum of the foundation slab of the building structure obtained, and then the dynamic safety analysis of the structure was performed using the foundation slab response spectrum. The results of the analysis show that the soil conditions have a slight amplification effect on the seismic response, which is reasonable according to the geological conditions of the site; the information of stress and strain on the soil after the seismic action is plotted, which can be used as input data for the sliding and overturning of structures.