Earthquakes and Structures

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The dynamic response of adjacent structures with the shallow foundation of different height and distance on liquefiable saturated sand

  • Jilei Hu (Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University) ;
  • Luoyan Wang (College of Civil Engineering & Architecture, China Three Gorges University) ;
  • Wenxiang Shen (College of Civil Engineering & Architecture, China Three Gorges University) ;
  • Fengjun Wei (School of Energy & Building Engineering, Shandong Huayu University of Technology) ;
  • Rendong Guo (School of Energy & Building Engineering, Shandong Huayu University of Technology) ;
  • Jing Wang (College of Civil Engineering & Architecture, China Three Gorges University)
  • Received : 2023.05.03
  • Accepted : 2023.07.20
  • Published : 2023.08.25
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Abstract

The structure-soil-structure interaction (SSSI) effect in adjacent structures may affect the liquefaction-induced damage of shallow foundation structures. The existing studies only analysed the independent effects on the structural dynamic response but ignored the coupling effect of height difference and distance of adjacent structures (F) on liquefied foundations on the dynamic response. Therefore, this paper adopts finite element and finite difference coupled dynamic analysis method to discuss the effect of the F on the seismic response of shallow foundation structures. The results show that the effect of the short structure on the acceleration response of the tall structure can be neglected as F increases when the height difference reaches 2 times the height of the short structure. The beneficial effect of SSSI on short structures is weakened under strong seismic excitations, and the effect of the increase of F on the settlement ratio gradually decreases, which causes a larger rotation hazard. When the distance is smaller than the foundation width, the short structure will exceed the rotation critical value and cause structural damage. When the distance is larger than the foundation width, the rotation angle is within the safe range (0.02 rad).

Keywords

Acknowledgement

The research described in this paper was financially supported by 111 Project of Hubei Province under Grant No. 2021EJD026.

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