Semi-active Outrigger Damping System for Seismic Protection of Building Structure

Abstract

The outrigger structural system is one of the most widely used lateral load-resisting structural systems for high-rise buildings. To increase the energy dissipation capacity of the outrigger system, an outrigger damping system has been proposed as a novel energy dissipation system. In this system, the outrigger and perimeter columns are separate and vertical viscous dampers are equipped between the outrigger and perimeter columns. In this study, the control performance of a semi-active outrigger damping system for the seismic protection of a building structure was investigated. Semi-active damping devices, such as magnetorheological (MR) dampers instead of passive dampers, are installed vertically between the outrigger and perimeter columns to achieve large and adaptable energy dissipation. A fuzzy logic control algorithm was used to generate a command voltage sent to the semi-active MR dampers. A genetic algorithm was used to optimize the fuzzy logic controller. An artificial earthquake load was generated for the numerical simulation and a simplified numerical model of a damped outrigger system was developed. Numerical analyses showed that the semi-active damped outrigger system could effectively reduce both the displacement and acceleration responses of the tall buildings compared to a passive outrigger damper system.

Evolution of Outrigger Structural System: A State-of-the-Art Review

“…This intended damper by authors is compared with electromagnetic transducers and found that the designed damper system is effective in vibration reduction for time history analysis. As MR damper has proved to be a promising device in structural control, in the article [100], a fuzzy logic algorithm is combined with genetic algorithm optimization for reducing the outrigger structural response. From this study, the displacement of the structure excited for an earthquake is shown in Fig.…”

“…13 Integrated steel amplification devices with viscous damper [93] Fig. 14 Displacement of structure without and with outrigger and semi-active outrigger [100] damping system and semi-active dampers regulated by different control algorithms to enhance the outrigger structural behavior.…”

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

“…(xviii) According to reference [186], using the distributed belt wall system as virtual outriggers is effective in reducing lateral drift of tall buildings as much as the conventional belt and outrigger structure. (xix) According to reference [187], the semiactive outrigger damping system can reduce both displacement and acceleration responses considerably compared to the conventional outrigger system. (xx) According to reference [188], the outrigger tuned inertial mass electromagnetic transduce (TIMET) improves energy generation efficiency to a large extent with the input energy to the structure kept low.…”

A Review on the Magnetorheological Fluid, Damper and Its Applications for Seismic Mitigation

“…Where the semi active device investigated the seismic response in a building using fuzzy control algorithm. The artificial seismic load was generated for numerical simulation for outrigger MR Damping model [62].…”