Period-Dependent Assessment of RC Buildings with ADAS Dampers for Seismic Retrofit

Seismic retrofitting of existing reinforced concrete (RC) buildings requires strategic selection of appropriate damping systems based on structural characteristics and seismic hazard types. This study presents a comprehensive period-dependent assessment of Added Damping and Stiffness (ADAS) dampers for RC building retrofit applications. Through systematic analysis of ۲۱۰ frame models (۱-۱۰ stories) with fundamental periods ranging from ۰.۰۲ to ۳.۳۳ seconds, we evaluate ADAS effectiveness under both near-field and far-field earthquake scenarios using Incremental Dynamic Analysis (IDA). Results reveal distinct period-dependent performance patterns: ADAS dampers provide optimal drift mitigation for medium-period structures (۰.۵-۱.۵s) under far-field conditions, while demonstrating superior collapse capacity enhancement for medium-to-high period buildings under near-field excitations. Statistical analysis confirms strong correlations between structural period and ADAS effectiveness (r = -۰.۸۲ for far-field PGA improvement, r = ۰.۱۷ for near-field). These findings establish quantitative guidelines for engineers to optimize ADAS damper selection, contributing to more effective and economical seismic retrofitting strategies.

کلیدواژه ها:

ADAS dampers ، seismic retrofit ، period-dependent analysis ، incremental dynamic analysis ، reinforced concrete buildings