Experimental and numerical investigation on seismic response of the soil-structure cluster interaction system. (15th June 2023)

• Record Type: Journal Article
• Authors: Wang, Guobo; Wang, Yao; Pan, Peng; Wang, Jianning
• Is Part Of: Engineering structures. Volume 285(2023)
• Publication Date: 2023-06-15
• Subjects: Shaking table test -- Soil-structure cluster interaction -- Structure-soil-structure interaction -- Seismic response -- Arias intensity index; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2023.116001
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A series of shaking table tests were carried out to investigate the soil-structure cluster interaction (SSCI). The influencing factors of number of structures, types of seismic wave and amplitude on SSCI effect were discussed. The effect of structures layout on SSCI was study based on numerical simulation. Abstract: With the rapid advancement of urbanization in recent decades, a large number of surface dense buildings have appeared. Soil-structure cluster interaction (SSCI) has attracted widespread attention. However, most current research is based on numerical simulations, and studies using shaking table tests are rare. Here, a series of shaking table tests of soil-structure interaction and SSCI systems were designed and conducted to investigate the effect of SSCI on the response of the structure and site soil. The number of structures, seismic wave types, and amplitudes were considered. The numerical method was verified based on test data. The test data and numerical results indicate that (1) the presence of surface buildings does not always reduce the free-field soil motion. However, the soil vibration decreases as the number of surface structures increases. (2) The maximum influence of SSCI effects on the roof acceleration and displacement of the central building (CB) can be as high as –23% and −18%, respectively. (3) The relative deformation of the structure decreases with an increase in the number of structures, and the relative deformation of the middle layer is the largest. (4) Different evaluation indices can yield roughly the same results, although the focus of each evaluation index is different. (5) A denser layout enhances the SSCI effect and further reduces the response of the CB when the urban density of the structural cluster is the same.