2D dynamic structure-soil-structure interaction for twin buildings in layered half-space I: Incident SH-waves. Issue 102 (November 2017)

• Record Type: Journal Article
• Authors: Liang, Jianwen; Han, Bing; Todorovska, Maria I.; Trifunac, Mihailo D.
• Is Part Of: Soil dynamics and earthquake engineering. Issue 102(2017)
• Page Start: 172
• Page End: 194
• Publication Date: 2017-11
• Subjects: Kinematic and dynamic structure-soil-structure interaction (SSSI) -- Dependence of SSSI on site effects -- Seismic response of twin buildings -- Seismic metamaterials; Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2017.08.017
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: Structure-soil-structure interaction (SSSI) is investigated using a model of two shear walls supported by rigid foundations embedded in a soft layer over elastic bedrock. Solution is presented for the model response to incident plane SH-wave based on indirect boundary element method (IBEM). The analysis focuses on the effects of the soil layer. Although the dominant features in the response of flexible structures are those related to the structural resonances, the SSSI effects are not negligible. Further, the SSSI effect are enhanced by the soil layering, and are more pronounced for shallower layer and stiffer bedrock. It is shown that for closely spaced structures, reduction of the peak response occurs, which may reach 30–45%, while, for certain combinations of frequency and separation distance, amplification occurs, which may reach 45–50%, as compared to the stand-alone structure. For inclined wave incidence, the SSSI effects occur for larger separation distances than for vertical incidence. The results may be useful for interpretation of observed response in buildings and seismic response estimation in general. Highlights: 2D structure-soil-structure interaction (SSSI) studied for incident SH-wave by IBEM. Twin buildings on rigid foundations embedded in a layered half-space. Results show SSSI effects enhanced by soil layering and not negligible. For closely spaced structures, 30% reduction of structural response due to SSSI. At some distances, 45% amplification of peak response due to SSSI.