Dynamic Analysis of Tapered Tall Buildings with Different Tube Structural Systems

Document Type : Regular Paper

Authors

1 Ph.D. Candidate of Structural Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

2 Associate Professor of Civil Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

Abstract

The purpose of this study is to obtain one of the important dynamical properties, namely natural frequency (ω) for a number of tall buildings with tube and tapered tube systems. Furthermore, it presents an approximate method to analyze the free vibration of tall buildings by tube, tube-in-tube, bundled tube, and tapered tube structures. The method we have proposed would enable us to compute the natural frequency of tubular vertical and tapered tall buildings by the help of computer programming. The models were analyzed by finite element and analytical methods. The results indicate that the investigated analytical method correctly calculates the natural frequency and is in decent accord with the finite element results and has better compatibility with tapered structures without angle with higher altitude. The resulting computational error is very low. Also, this analytical method has the least error for tube systems and the highest error is for tube-in-tube systems.

Highlights

  • This paper obtains the important dynamical properties natural frequency.
  • The weak form differential equation method with is solved.
  • Approximate method is applied for the analysis of free vibration tapered structures.
  • Analysis of tube, tube-in-tube, bundled and tapered tube structures are presented.
  • Results of analytical method are compared with the finite element.

Keywords

Main Subjects

References

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History

  • Receive Date: 19 March 2020
  • Revise Date: 19 June 2020
  • Accept Date: 01 May 2021

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