Study On The Interaction Effects Between Adjacent Structures Under Oblique Incident Seismic Wave

Nowadays,economic develops rapidly,urbanization is accelerating, land resources are increasingly strained.Not only building spacing is becoming more and more intensive,high-rise and even super high-rise buildings continue to emerge.During an earthquake,there is interaction between building itself and the foundation soil,beyond that,there will be interaction between adjacent buildings.Recognize the effect of the interaction will be of great significance to the guidance of the practical engineering.In this paper,the main work is as follows:(1)An analysis method was proposed, which could take structure-soil-structure interaction into consideration when calculating the seismic response of the three dimensional structure.And the algor ithm was realized through programming.(2)Study on parameters of soil-structure interaction.Based on the theoretical analysis, six dimensionless parameters which affected the soil-structure interaction were determined.We established 14 different 3-D soil-structure interaction models.And using the analysis method proposed,we analyzed their responses under the incident of SH wave, P wave, SV wave at different angles,studied the six dimensionless parameters for the influence law of soil-structure interaction in detail.Different from the two-dimensional case, there was a signif icant coupling effect among the dynamic components of the foundation in three-dimensional soil-structure interaction.(3)Study on the influencing factors of the interaction between adjacent structures.we set up 7 different 3-D structure-soil-structure interaction calculation models.Using the analysis method proposed,we analyzed the structure responses under the incident of SH wave,P wave,SV wave at different angles,mainly discussed the influences of the foundation spacing, arrangement mode, structure size and other factors.It was found that vibration characteristics of the structure would be reflected in the response of its adjacent structure through the soil.(4)Finally, we calculated the responses of two frame structures in the presence or absence of adjacent structure and verified the above conclusion.This indicates that the method proposed can be used for 3-D structure-soil-structure interaction analysis.And compared with the two-dimensional steady-state solutions obtained by Luco et al., the three-dimensional transient solution obtained in this paper has more guiding significance to practical engineering.