Volume 15, Issue 1 (1-2025)
IJOCE 2025, 15(1): 97-110 |
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Kaveh A, Rezazadeh Ardebili S. DEVELOPMENT OF EQUIVALENT DAMPING RATIO FOR CONCRETE/STEEL MIXED STRUCTURES CONSIDERING SOIL-STRUCTURE INTERACTION. IJOCE 2025; 15 (1) :97-110
URL: http://ijoce.iust.ac.ir/article-1-625-en.html
URL: http://ijoce.iust.ac.ir/article-1-625-en.html
1- School of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran-16, Iran
Abstract: (213 Views)
Identification of damping properties for a mixed structure and its interaction with underlying soil is a challenge for structural designers. Current codes and available commercial software packages do not provide analytical solutions for such structural systems. Due to irregular damping ratios, dynamic response of each part of a mixed structure differs significantly. In addition, when the structure is subjected to seismic loads, the soil-structure interaction effects cannot be neglected. To manage these issues, this paper proposes an equivalent damping ratio for mixed structures by means of a semi-empirical error minimization method which considers soil-structure interaction. The results of numerical simulations indicate that the use of the equivalent damping ratios makes the results of dynamics analyses closer to the ones obtained by the actual damping ratios. Consequently, proposed method provides a much better approximation than the case in which the conservative overall ratio of 2% or 5% is used.
Keywords: Mixed structure, equivalent damping ratio, soil-structure interaction, semi-empirical error minimization
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