Investigation of Steel moment Frame with frictional-rotational dampers by endurance time method

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Salmani Ali; Shayanfar Mohsen Ali; Zabihi Samani Masoud

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Journal Paper

Paper Information

Journal: Journal of Structural and Construction Engineering Year:2024 | Volume:11 | Issue:7 Page(s): 40-61

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Information Journal Paper

Title

Investigation of Steel moment Frame with frictional-rotational dampers by endurance time method

Author(s)

Salmani Ali | Shayanfar Mohsen Ali | Zabihi Samani Masoud | Issue Writer Certificate

Keywords

Endurance Time method

Frictional-rotational dampers

Performance index

time history analysis

Target time

Abstract

The most comprehensive analysis methods are non-linear methods that require a lot of calculations. In this research, the Endurance Time method is used, that is a new dynamic method in which the need for calculations is reduced. In the Endurance Time method, the structures are subjected to specially designed acceleration functions and their response at different performance levels is estimated by each of the unit response history analyses, thus, significantly reducing the required computational demand. The design of rotational friction dampers in the studied structures was done based on the seismic Performance index by Endurance Time method, and the sliding force of these dampers was uniformly distributed in the structure. The results of this research for two structures of 3 and 9 floors showed that the shear of the base is between 60 and 100%, as expected, considering that the structure was a moment frame at the beginning and had a different Target time, and then braces were added to it. Increased. Due to the addition of the damper to the system, taking into account the relative increase in input energy, as expected, the amount of depreciated energy is between 10 and 97%. In relation to the study of drift, the reduction of the values in the floors was high, which was reported from 5 to more than 50% according to the results

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