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Design of Optimal Slit Steel Damper Under Cyclic Loading for Special Moment Frame by Cuckoo Search

  • Masoud Zabihi-SamaniEmail author
Article
  • 23 Downloads

Abstract

After the Northridge and Kobe earthquakes, several destruction of the structural beams were occurred. The difficulty and cost-effectiveness of beam replacement after earthquakes is a major problem on steel structures. For this purpose, the idea of using replaceable connection is suggested. A slit steel damper (SSD) is introduced that leads to the further energy damping and the ability to move the plastic joint outside of structural elements. The stiffness and damping characteristics of SSD is related to the thickness, height and number of sheets of the damper. The usage of SSD is more progressive and at the same time, the optimal design of SSDs should be proposed to meet the economical criterion and the reduction of the stress and deflection. In this study, an optimal SSD connection is proposed to enhance the performance of the classical SSD connection to meet the criterion of AISC to utilize in special moment frames. The results demonstrated that increasing the thickness and reduction of the steel sheets in the damper had a greater effect on the performance of the SSD connection, in comparison with the increase in the number of sheets. Therefore, the Cuckoo Search (CS) was utilized to optimize the several SSD parameters. Furthermore, a comparison between the CS-SSD and Reduced Beam Section (RBS) which is known as a common moment steel fixed-connection was accomplished. Results indicate that CS-SSD connection can reach the same function as the RBS connections under cycling loadings, in addition to the easy replacement capability after seismic excitations. The performance of the proposed CS optimization algorithm in designing of the optimal SSD was compared with the traditional Genetic Algorithm and the particle swarm optimization (PSO) with considering several designing constraints. High capabilities of the proposed CS optimization algorithm in terms of weight, energy absorption, stiffness and bearing capacity of SSD connections are simultaneously clarified by the results.

Keywords

Optimal Slit steel damper Reduced beam section Cyclic loading Special bending frame Cuckoo Search algorithm 

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Copyright information

© Korean Society of Steel Construction 2019

Authors and Affiliations

  1. 1.Department of Civil Engineering, Parand BranchIslamic Azad UniversityParandIran

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