Performance of a passive rate‐independent damping device in a seismically isolated multistory building

Abstract

Summary In the 2011 Great East Japan Earthquake, low‐frequency components of ground motion brought long‐duration shaking to high‐rise buildings in mega‐cities far from the epicenter, resulting in damage to their interior and exterior walls, and unsafe conditions for the building occupants. Rate‐independent linear damping (RILD) has been suggested as a viable option for simultaneously reducing the excessive displacement and floor response acceleration of a low‐frequency structure. While the majority of previous studies on RILD have mainly focused on theoretical and mathematical approaches, the practical applications of RILD have not been extensively investigated. In this regard, this study aims to experimentally and analytically investigate the physical implementation of RILD for the protection of a multistory low‐frequency structure. The effectiveness of the proposed passive causal RILD device, comprising a Maxwell‐type damper and negative stiffness, incorporated into a seismically isolated building was investigated based on real‐time hybrid simulation. Under strong ground motions, the passive causal RILD device could greatly reduce the floor response accelerations in the seismically isolated structure, compared with a linear viscous damping device.

Feasibility Study of a Novel Modal Decomposition Method for Low‐Frequency Structure with Nonproportionally Distributed Rate‐Independent Linear Damping

“…Liu et al [29] developed three models to realize an ideal RILD and improve the performance of a higher-order flter [28]. Liu and Ikago [30][31][32][33] were the frst to conduct realtime hybrid testing using mechanical devices to passively realize a noncausal RILD device. Recently, Liu and Liu [34] conducted the frst experiment to realize a modifed RILD model [29] using a small-scale MR damper.…”

Impact of heatwaves and system shocks on a nearly zero energy educational building: Is it resilient to overheating?

“…The resilient performance of buildings has been assessed and improved against certain types of shocks with policies set in motion by building legislations. This includes frameworks to improve resilience of new and existing buildings against natural disasters (earthquakes, extreme weather) through quantifying risks and adopting mitigating strategies (e.g., advanced construction materials, damping mechanisms) [36,37]. Building resilience has also been assessed and improved against fire hazards (i.e., fire-resisting materials, water and power backups) [38,39].…”

“…A few studies have attempted to evaluate qualitatively and quantitatively the thermal resilience of buildings to overheating. IEA EBC's Annex 80 [40] conducted several studies evaluating the thermal resilience of existing buildings and passive cooling strategies [37][38][39][40].…”