Abstract
During an earthquake, the seismic response of adjacent buildings will be affected by each other, which is known as structure-soil-structure interaction (SSSI). In order to study the SSSI between neighboring buildings, the slab foundation frame structure on a typical type II site in Nanjing is used as the object. ABAQUS software is used to establish a nonlinear static-dynamic coupling two-dimensional finite element analysis model of a single building and multiple buildings with different spacing. The numerical analysis of the model shows that: Under the action of earthquakes, the increase of surrounding structures will increase its own acceleration response; when the building spacing ratio is 1/2 and 1/4, the existence of adjacent buildings will reduce its own acceleration response. When the spacing ratio is greater than or equal to 1, the impact tends to be unfavorable, and it is the most unfavorable when the spacing ratio is 2. When the spacing ratio is greater than or equal to 4, the impact of adjacent buildings on each other’s peak acceleration response can be ignored.
Highlights
The seismic safety of various building structures during an earthquake is very important
There may be a large number of other building structures around the building, especially in cities, and tightly adjacent buildings inevitably have extremely complex interactions during earthquakes, which is known as structure-soil-structure interaction (SSSI)
Finite element numerical analysis method is the main method for analyzing SSSI problems in ground motion [1].Such as S.Wang[2] used FEM-BEM to study the influence of parameters which is building spacing, the alignment direction of the two building foundations and the load position on the dynamic response of the structure
Summary
The seismic safety of various building structures during an earthquake is very important. Finite element numerical analysis method is the main method for analyzing SSSI problems in ground motion [1].Such as S.Wang[2] used FEM-BEM to study the influence of parameters which is building spacing, the alignment direction of the two building foundations and the load position on the dynamic response of the structure. Padron LA[4] analyzed the adjacent buildings under earthquakes by modeling soil and superstructure, They observed that the SSSI is strongly affected by the separation distance. I built many Non-linear static-dynamic coupling two-dimensional finite element analysis models of multiple building soil-structure systems with different spacing. By comparing the results of numerical simulation analysis, the effects of the number of adjacent buildings and spacing on the acceleration response of the structure are studied. The research conclusions have certain reference significance for the seismic performance evaluation of adjacent building superstructures
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