Optimal retrofit strategy using viscous dampers between adjacent RC and SMRFs prone to earthquake‑induced pounding

Neda Asgarkhani; Farzin Kazemi; Robert Jankowski

doi:10.1007/s43452-022-00542-1

Optimal retrofit strategy using viscous dampers between adjacent RC and SMRFs prone to earthquake‑induced pounding

Abstract

Nowadays, retrofitting-damaged buildings is an important challenge for engineers. Finding the optimal placement of Viscous Dampers (VDs) between adjacent structures prone to earthquake-induced pounding can help designers to implement VDs with optimizing the cost of construction and achieving higher performance levels for both structures. In this research, the optimal placement of linear and nonlinear VDs between the 3-story, 5-story, and 9-story Steel and RC Moment-Resisting Frames (SMRFs and RC MRFs) is investigated. It is shown that the pounding phenomenon can significantly affect the seismic performance capacities of buildings during earthquakes, and using VDs can improve the seismic limit-state capacities of buildings for retrofitting purposes. For this goal, the seismic limit-state capacities of both colliding structures were assessed using Incremental Dynamic Analysis (IDA) assuming Near-fault Pulse-Like, Near-fault No-Pulse, and Far-Fault seismic records suggested by FEMA-P695. To perform IDAs, structures were modeled according to the seismic codes using a developed algorithm in Matlab and OpenSees software with the ability to remove a collapsed structure during the analysis. The results present an optimal placement for using VDs between structures and also compare the possible conditions to implement VDs. Using these results, engineers can approximately predict the seismic performance levels of both structures prone to earthquake-induced pounding and their final performance after retrofitting. Finally, retrofitting modification factors were proposed to help designers to predict the limit-state performance levels of retrofitted colliding structures without involving complicated and time-consuming analyses.

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Keywords

VISCOUS DAMPERS · STRUCTURAL POUNDING · SEISMIC RETROFITTING · RETROFITTING MODIFICATION FACTOR · SEISMIC LIMITSTATE CAPACITY · INCREMENTAL DYNAMIC ANALYSIS

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

Archives of Civil and Mechanical Engineering no. 23,
ISSN: 1644-9665

Language:

English

Publication year:

2023

Bibliographic description:

Asgarkhani N., Kazemi F., Jankowski R.: Optimal retrofit strategy using viscous dampers between adjacent RC and SMRFs prone to earthquake‑induced pounding// Archives of Civil and Mechanical Engineering -Vol. 23,iss. 1 (2023), s.7-

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