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Vol. 56 (2015) No. 2 June n. 184


Dynamic Performance Analysis of Single-Layer Cylindrical Reticulated Shell Considering Pile-Soil-Structure Interaction

< Table of Contents for Vol. 56 (2015) No. 2 June n. 184
  • Journal Name: Journal of the International Association for Shell and Spatial Structures (J. IASS)
  • ISSN: (Electronic Version) 1996-9015
  • ISSN: (Print Version) 1028-365X
  • Issue: Vol. 56 (2015) No. 2 June n. 184
  • Pages: 91-100
  • Title: Dynamic Performance Analysis of Single-Layer Cylindrical Reticulated Shell Considering Pile-Soil-Structure Interaction
  • Author(s): S.-d. Xue, Y. Liu and X.-y. Li
  • Keywords: single-layer cylindrical reticulated shell, pile-soil-structure interaction, viscoelastic boundary, ground motion input, natural vibration property, seismic response
Abstract
The finite element method was used to study the dynamic performance of single-layer cylindrical reticulated shell considering pile-soil-structure interaction (PSSI). The finite-element software ABAQUS was used in combination with a FORTRAN program. A viscoelastic artificial boundary was adopted to simulate three-dimensional foundation soil. The ground motions were transformed into equivalent loads of boundary nodes to provide a ground motion input associated with the viscoelastic boundary. Then an example was developed to verify the validity and rationality of the finite element calculation process. Finally, a 3D finite element integral model was established to make a comprehensive analysis of single-layer cylindrical reticulated shell’s dynamic performances. The integral model consisted of single-layer cylindrical reticulated shell roof, supporting structure, piles and foundation soils. The results indicate that the first mode shape of the single-layer cylindrical reticulated shell remains horizontal when the PSSI is considered. The natural vibration frequencies of the shell decrease and become more intensive compared to the rigid foundation assumption. Furthermore, the peak acceleration of pile cap center increases nearly 5%~10% compared to the peak acceleration of free field under the action of earthquake. At the same time, the nodal displacement and nodal peak acceleration of single-layer cylindrical reticulated shell increase obviously considering pile-soil-structure interaction.

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