scholarly journals Review on vibration control in tall buildings: from the perspective of devices and applications

2020 ◽  
Author(s):  
BG Kavyashree ◽  
Shantharam Patil ◽  
Vidya S. Rao
Keyword(s):  
Control System ◽  
Active Control ◽  
Structural Control ◽  
Passive Control ◽  
Hybrid Control ◽  
Tall Buildings ◽  
Effective Control ◽  
Earthquake Load ◽  
History Of ◽  
External Loads

AbstractPermanent construction has evolved from the Palaeolithic age to today’s skyscrapers. Constructing the structure, which promises occupants safety, has become a concern because of the uncertainties in nature. Therefore in recent years, attention has been given to the development of structural protective devices that could take care of the external loads. Structural control against the wind and earthquake load has been seriously studied where the structure behaves differently for wind and earthquake load has been briefly discussed in this paper. Initially, paper discusses the history of the construction and the passive control system, which was used in structural control, is briefly discussed in this paper. Also, the implementation of active control has been discussed which was introduced later in the structural control for more effective control. But the limitations of the passive and active control system have introduced semi-active control and also the hybrid control strategy. The two mechanisms are put together in the semi-active and hybrid system to obtain all advantages of the algorithm along with overcoming their limitations. The review also briefs about stochastic vibrational control of the structure where randomness is considered in external loads, parameter of the system and also in the external devices which are implemented in the structural control. As construction sector is a complex system, big data analysis, a new field in structural control system is discussed and future scope is also mentioned.

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

2021 ◽  
Author(s):  
B. G. Kavyashree ◽  
Shantharam Patil ◽  
Vidya S. Rao
Keyword(s):  
Control System ◽  
Active Control ◽  
Structural Control ◽  
Passive Control ◽  
Performance Enhancement ◽  
System Development ◽  
Tall Buildings ◽  
Smart Devices ◽  
Structural System ◽  
Active Control System

AbstractThis paper presents the development of the outrigger structural system from the conventional outrigger to damped outrigger concepts. Outrigger structural system development from the conservative design as a rigid connection to a virtual connection with passive control, active control system, semi-active control system to hybrid control system is deliberated. Following brief overviews on history of outriggers, types of the outrigger, analysis of tall buildings without outriggers, formulation of equations for outrigger structure to simplify analysis are elaborated. Different approach to locate optimum positioning of outriggers in tall structure is elucidated. Analysis of outrigger to study its behavior in high-rise buildings using different methods is stated, and review on the damped outrigger system is explicated. This paper tries to highlight the advantages of outrigger structure with semi-active control and performance enhancement of the outrigger system with the effective devices, and enhanced results are also depicted. This review also paves a way for the new area of research in structural control with the incorporation of smart devices and smart technology.

Active/Passive Hybrid Control System for Compressor Surge Based on Fuzzy Logic

2014 ◽  
Vol 136 (9) ◽  
Author(s):  
Hanlin Sheng ◽  
Wei Huang ◽  
Tianhong Zhang ◽  
Xianghua Huang
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Active Control ◽  
Hybrid System ◽  
Passive Control ◽  
Hybrid Control ◽  
Control Mode ◽  
Compressor Surge ◽  
Surge Line ◽  
Hybrid Control System

A hybrid control system has been proposed for compressor surge, which combines the active method with the passive method. A bleed valve was selected as the actuator in the proposed system. As a submode of the hybrid system, a fuzzy logic based active controller was designed to extend the stability operating range of the compressor. Meanwhile, a surge avoidance controller was used as a backup-mode to improve the safety performance of the system. The simulation results showed that the compressor can operate steadily outside the surge line under active control mode and can be dragged back to inside the surge line by the passive control mode when the alternative fails. One advantage of the proposed control system is that it does not need a model of the compressor, and it works on any compression system. Passive surge control is a reliable and widely applied method in industrial compressors. The hybrid system makes the active control approach closer to the industrial implementation.

RECENT DEVELOPMENTS OF STRUCTURAL VIBRATION CONTROL IN CIVIL ENGINEERING IN CHINA

2010 ◽  
Vol 04 (01) ◽  
pp. 9-21 ◽  
Author(s):  
LI HONGNAN ◽  
HUO LINSHENG
Keyword(s):  
Active Control ◽  
Structural Control ◽  
Passive Control ◽  
Civil Engineering ◽  
Hybrid Control ◽  
Structural Vibration ◽  
Engineering Structures ◽  
Recent Developments ◽  
Practical Engineering ◽  
Seismic Response Of Buildings

In recent years, much attention has been paid to research and development of structural control techniques with particular emphasis on alleviation of wind and seismic response of buildings and bridges in China. Structural control in civil engineering has been developed from the concept into a workable technology and applied into practical engineering structures. The aim of this paper is to review a state-of-the-art of researches and application of structural control in civil engineering in China. It includes the passive control, active control, hybrid control, and semi-active control. Finally, the possible future directions of structural control in civil engineering in China are presented.

Study on Hybrid Control Method of Mega-Sub Controlled Structure Subjected to Seismic Action

2012 ◽  
Vol 204-208 ◽  
pp. 2955-2961 ◽  
Author(s):  
Dong Zhou Xia
Keyword(s):  
Active Control ◽  
Structural Control ◽  
Control Method ◽  
Hybrid Control ◽  
Tall Buildings ◽  
Parameters Optimization ◽  
Seismic Action ◽  
Control Force ◽  
Control Effectiveness ◽  
Controlled Structure

A new structural configuration that named Mega-sub controlled structure (MSCS) is presented in the process of tall buildings, super tall buildings and super tall tower construction. To further improve the structural control effectiveness of MSCS, new hybrid control method which employs active control and adjusts the stiffness of substructure is proposed. At the same time, the control law and dynamic equation are presented that assembling parameter matrixes for the MSCS subjected to horizontal seismic excitation. Then, the influence of adjusting structure parameter and active control parameter on control effectiveness, dynamic characteristic and control force of the MSCS under hybrid control is discussed. Results indicate that, the new hybrid control method proposed in the paper has the ability to develop a high level of response control effectiveness when subjected to seismic action, and a much better control effectiveness will be obtained after parameters optimization.

The Semi-Active Control Considering Structure-Basement-Pile-Soil Interaction

2010 ◽  
Vol 163-167 ◽  
pp. 2780-2786
Author(s):  
Yan Tao Li ◽  
Zhan Xue Zhou
Keyword(s):  
Active Control ◽  
Structural Control ◽  
Soil Structure ◽  
Tall Buildings ◽  
Interaction System ◽  
Subdomain Method ◽  
Infinite Element Method ◽  
Fixed End ◽  
Instantaneous Optimal Control ◽  
The Impact

The interaction system which includes pi1e-supported tall buildings with multistoried basements and the adjacent medium of soil subject to the impact of earthquake is formulated in terms of the spline subdomain method,semi-analytical infinite element method and the bend-shear model of beam element,respectively.Taking advantage of the instantaneous optimal control algorithm, structure-basements-piles-soil interaction effect on the semi-active control is considered. It is shown that the results of structural control have obvious difference between the interaction system and the fixed-end system.The response of the former may be less about 10 percent than the latter in the paper.The dissipative capability of the structure self may be ignored largely if the interaction isn’t considered.When designing the system of the semi-active control, especially for some tall buildings,soil-structure interaction should be taken into consideration.

scholarly journals Abating Earthquake Effects on Buildings by Active Slip Brace Devices

1995 ◽  
Vol 2 (2) ◽  
pp. 133-142 ◽  
Author(s):  
Zekai Akbay ◽  
Haluk M. Aktan
Keyword(s):  
Control System ◽  
Energy Dissipation ◽  
Coulomb Friction ◽  
Hybrid Control ◽  
Time Intervals ◽  
Earthquake Load ◽  
Earthquake Effects ◽  
Hybrid Control System ◽  
Short Time ◽  
Active Slip

A hybrid control system for reducing building vibration under a spectrum of earthquake load amplitudes is presented. The hybrid control is accomplished by an energy dissipation device called the active slip brace device (ASBD). The hybrid control system uses the ASBD to regulate the energy dissipation characteristics of the building during its response to earthquakes by utilizing active control principles. The ASBD consists of a Coulomb friction interface with a clamping mechanism on the interface. The clamping force on the friction interface is altered at short time intervals during building vibration. Computer simulations of building response with and without ASBD are compared.

scholarly journals Advances in Structural Control in Civil Engineering in China

2010 ◽  
Vol 2010 ◽  
pp. 1-23 ◽  
Author(s):  
Hongnan Li ◽  
Linsheng Huo
Keyword(s):  
Active Control ◽  
Structural Control ◽  
Passive Control ◽  
Civil Engineering ◽  
State Of The Art ◽  
Semiactive Control ◽  
Engineering Structures ◽  
Future Directions ◽  
Control Techniques ◽  
Practical Engineering

In the recent years, much attention has been paid to the research and development of structural control techniques with particular emphasis on alleviation of wind and seismic responses of buildings and bridges in China. Structural control in civil engineering has been developed from the concept into a workable technology and applied into practical engineering structures. The aim of this paper is to review a state of the art of researches and applications of structural control in civil engineering in China. It includes the passive control, active control, hybrid controland semiactive control. Finally, the possible future directions of structural control in civil engineering in China are presented.

Analysis of Vibration Control due to Strong Earthquakes

2010 ◽  
Vol 163-167 ◽  
pp. 4179-4184 ◽  
Author(s):  
He Len Wu
Keyword(s):  
Control System ◽  
Active Control ◽  
Base Isolation ◽  
Hybrid Control ◽  
Ground Motions ◽  
Isolation System ◽  
System A ◽  
Base Isolation System ◽  
Active Control System ◽  
Hybrid Control System

The paper proposes an aseismic hybrid control system to control the response of structures subjected to large ground motions caused by large magnitude earthquakes. The proposed hybrid control system consists of a base isolation system (laminated rubber bearings) connected to an active control system (a tuned mass damper and an actuator). The base isolation system is used to decouple the horizontal ground motions from the structure, whereas the active control system is used to protect the safety and integrity of the base isolation system. A 5-story benchmark building model is developed to study the effectiveness of the hybrid control system against different ground motions. It was found from the numerical results that rubber bearing system alone shows good performance and resists ground motion due to Hachinohe 1968, Kobe 1995, and Northridge 1994 earthquakes, but is somewhat unable to protect the model against El-Centro 1940 earthquake. After the installation of an active control system onto the rubber-isolated model, further improvements to earthquake resistance against these four earthquakes were observed, especially against the El-Centro earthquake. The merit of the hybrid control system lies in its capability to protect against different ground motions, with varying intensity and frequency content.

scholarly journals Hybrid Electromagnetic Shunt Damper for Vibration Control

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Ahmad Paknejad ◽  
Guoying Zhao ◽  
Simon Chesné ◽  
Arnaud Deraemaeker ◽  
Christophe Collette
Keyword(s):  
Control System ◽  
Power Consumption ◽  
Control Systems ◽  
Active Control ◽  
Hybrid Control ◽  
Current Source ◽  
Voltage Source ◽  
Control Law ◽  
Electromagnetic Devices ◽  
Hybrid Control System

Abstract It has been shown that shunting electromagnetic devices with electrical networks can be used to damp vibrations. These absorbers have however limitations that restrict the control performance, i.e., the total damping of the system and robustness versus parameter variations. On the other hand, the electromagnetic devices are widely used in active control techniques as an actuator. The major difficulty that arises in practical implementation of these techniques is the power consumption required for conditioners and control units. In this study, robust hybrid control system is designed to combine the passive electromagnetic shunt damper with an active control in order to improve the performance with low power consumption. Two different active control laws, based on an active voltage source and an active current source, are proposed and compared. The control law of the active voltage source is the direct velocity feedback. However, the control law of the active current source is a revisited direct velocity feedback. The method of maximum damping, i.e., maximizing the exponential time-decay rate of the response subjected to the external impulse forcing function, is employed to optimize the parameters of the passive and the hybrid control systems. The advantage of using the hybrid control configuration in comparison with purely active control system is also investigated in terms of the power consumption. Besides these assets, it is demonstrated that the hybrid control system can tolerate a much higher level of uncertainty than the purely passive control systems.

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