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Seismic performance of outrigger–belt truss system considering soil–structure interaction

Authors
  • Tavakoli, Reihaneh1
  • Kamgar, Reza2
  • Rahgozar, Reza1
  • 1 Shahid Bahonar University of Kerman, Department of Civil Engineering, Kerman, Iran , Kerman (Iran)
  • 2 Shahrekord University, Department of Civil Engineering, Shahrekord, Iran , Shahrekord (Iran)
Type
Published Article
Journal
International Journal of Advanced Structural Engineering
Publisher
Springer Berlin Heidelberg
Publication Date
Feb 01, 2019
Volume
11
Issue
1
Pages
45–54
Identifiers
DOI: 10.1007/s40091-019-0215-7
Source
Springer Nature
Keywords
License
Green

Abstract

The focus of this study is to investigate the seismic behavior of outrigger-braced building considering the soil–structure interaction based on finding the best location of outrigger and belt truss system. For this purpose, a central outrigger-braced frame of a steel tall building is considered. A layered soil deposit underlied this frame and the resulting soil–structure system is subjected to seismic excitation. To analyze this system, direct method is employed in OpenSees. Also, elastic and in-elastic analyses are both considered and a comparison is made between current results and the results related to the system with fixed base. The best location of outrigger–belt truss system is determined by considering the maximum roof displacement, base moment and base shear with and without soil–structure interaction. It is shown that considering SSI affects the location of outrigger–belt truss system. Elastic analysis of both systems, namely with fixed base and with soil–structure interaction, showed that locating the belt truss at higher stories caused lower amounts of roof displacement.

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