Prestressing Effect on SMA Damper Aimed at Improvement of Seismic Performance of Marine Structures

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Rostami Mehran; Hamidia Mohammadjavad; Mahmoodi Mohammad Javad

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Journal Paper

Paper Information

Journal: Ferdowsi Civil Engineering Year:2024 | Volume:37 | Issue:2 Page(s): 83-98

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Information Journal Paper

Title

Prestressing Effect on SMA Damper Aimed at Improvement of Seismic Performance of Marine Structures

Author(s)

Rostami Mehran | Hamidia Mohammadjavad | Mahmoodi Mohammad Javad | Issue Writer Certificate

Keywords

Shape Memory Alloy

Passive Control

Energy Dissipation

Prestressing

Marine structure

Abstract

Structural control mechanisms are used as a reliable and efficient methods to enhance seismic performance and stability of structures. Ensuring the integrity and stability of civil infrastructures such as Marine structures, especially oil platforms exposed to difficult environmental conditions, poses challenges that engineers strive to overcome. Introducing innovative methods and improving existing system performance can significantly aid in addressing these challenges. The objective of the present research is to investigate the effect of different levels of pre-stressing on Shape Memory Alloy wires in a passive damper based on Shape Memory Alloy and its impact on reducing the seismic re-sponse of Marine structures. For this purpose, a simplified Marine structure is modeled, and a struc-tural control system with a passive damper using Shape Memory Alloy is incorporated. The results of different scenarios after applying seven sets of scaled ground motions from far field earthquakes and time history analyses have been evaluated. The obtained results indicate that increasing the cross-sectional area of the wires and increasing their pre-stress level reduces the maximum displacement of the structure and improves the overall performance of the structural control system. Furthermore, considering three different scenarios for the frame, the influence of frame stiffness on the results has been assessed.

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