Review of Structural Control Technologies Using Magnetorheological Elastomers

2019 ◽  
Vol 4 (1) ◽  
pp. 22-28 ◽  
Author(s):  
J. Yang ◽  
S.S. Sun ◽  
S.W. Zhang ◽  
W.H. Li
Keyword(s):  
Structural Control ◽  
Structural Integrity ◽  
Base Isolation ◽  
Structural Vibration ◽  
Smart Devices ◽  
Structure Control ◽  
Mass Damper ◽  
Strong Winds ◽  
Control Technologies ◽  
Mr Effect

It is critically important to protect civil structures from unpredictable events, including earthquakes and strong winds, as well as maintaining their structural integrity and serviceability. To this end, considerable attention has been paid on the research and development of aseismic technology. This paper provides a literature review on the recent progress of Magnetorheological Elastomer (MRE) and the development and application of MRE devices on structure control technology. Firstly, this paper reviewed the investigations into the MR effect, mechanical property of MRE and its ingredients during the past decades. Then, research interests arising in the implementation and development of smart devices using MREs on structure control will be systematically reviewed. Basically, MRE base isolation and MRE based tuned mass damper are two major technologies to attenuate structural vibration, which will be the main focus of this paper.

scholarly journals Multistorey Residential Building with Base Isolation Method Using SAP

2018 ◽  
Vol 7 (3.10) ◽  
pp. 88
Author(s):  
T Subramani ◽  
M Shanmuganandam
Keyword(s):  
Earth Quake ◽  
Base Isolation ◽  
Residential Building ◽  
Structural Vibration ◽  
Isolation Method ◽  
Structural Vibration Control ◽  
Building Shape ◽  
Control Technologies ◽  
Seismic Impact ◽  
The Impact

Residential homes are of exceptional significance after any natural calamity which encompass earthquake. The structural and non-structural additives need to stay operational and secure after earthquake. So you can mitigate the impact of earthquake at the structure the bottom isolation method is the splendid opportunity as a seismic protecting system. The primary concept of base isolation gadget is to lessen the earthquake brought on inertia forces by using growing the fundamental length of the structure. Base isolation is one of the most effective tools of engineering concerning the passive structural vibration control technologies. It is supposed to allow a building or non-building shape to continue to exist a probably devastating seismic impact thru a right preliminary design or next changes. In some instances, software of base isolation can improve each a structure's performance and its seismic sustainability notably. he behaviour of multi-storey building of ordinary and abnormal configuration beneath earth quake is complex and it varies of wind masses are assumed to behave concurrently with earth quake loads. On this paper a residential of multi-storey constructing is studied for earth quake with base isolation approach using SAP 2000.  

scholarly journals Fixed and Base Isolated Framed Structures: A Comparative Study

2021 ◽  
Vol 2070 (1) ◽  
pp. 012198
Author(s):  
Sajan K Jose ◽  
G S Anjali ◽  
Aarya S Nair ◽  
D A Adithya ◽  
Ananya Sony ◽  
...  
Keyword(s):  
Composite Structures ◽  
Base Isolation ◽  
Response Spectrum ◽  
Structural Vibration ◽  
Structural Vibration Control ◽  
Rc Structure ◽  
Lead Rubber Bearings ◽  
Different Shapes ◽  
Control Technologies ◽  
Rubber Bearings

Abstract Necessity of constructing multi-storied buildings is increasing these days. But they are more prone to severe damage due to earthquakes. Base isolation is one of the most powerful tools pertaining to the passive structural vibration control technologies. The structure above the ground, is separated from the effects of earthquake forces by introducing a mechanism that helps the structure to hover. This project deals with analysis of 10 storey RCC, Steel and Composite structures of different shapes with and without base isolation in various seismic zones by Response Spectrum Method using ETABS software. Lead rubber bearings designed as per UBC97 was used for base isolation. Plus shape was found to be most suitable for base isolation for RC structure, whereas for steel and composite structures rectangular and hollow shapes were found suitable. It was also observed that concrete structure performs best when base isolated, compared to other structures.

scholarly journals Passive vibration control in a civil structure: Experimental results

2019 ◽  
Vol 52 (7-8) ◽  
pp. 938-946 ◽  
Author(s):  
Josué Enríquez-Zárate ◽  
Hugo Francisco Abundis-Fong ◽  
Ramiro Velázquez ◽  
Sebastián Gutiérrez
Keyword(s):  
Vibration Control ◽  
Structural Control ◽  
Passive Control ◽  
Tuned Mass Damper ◽  
Experimental Results ◽  
Structural Vibration ◽  
Control Technique ◽  
Primary System ◽  
Vibration Absorption ◽  
Mass Damper

The problem of vibrations in civil structures is common; nevertheless, its negative effects can be significantly reduced using structural control methods with intention of maintaining structural welfare as much as possible. This work deals with the study of structural vibration control in a model of a civil-like structure, which consists of three-level building with a tuned mass damper implemented as a passive vibration absorber, mounted on the top of the structure, to attenuate the harmonic vibrations provided by an electromagnetic actuator connected at the base of the primary system. The action of the tuned mass damper is evaluated from an energy approach. The dissipation of energy in the overall system is conducted in an experimental way, where the passive control technique is designed to minimize the undesirable forced dynamic response of the main structure via the tuned mass damper. Experimental results are provided to show the effective performance of the proposed passive vibration absorption scheme to suppress resonant frequency harmonic excitations disturbing the primary system, evaluating the performance energy and contribution of the dissipative device for the energy release in the overall system.

scholarly journals Structural Control Using LRB in Irregular Building

2021 ◽  
pp. 136-156
Author(s):  
Aamir A. Mansuri ◽  
Vishal B. Patel ◽  
Chetan Machhi
Keyword(s):  
Associate Degree ◽  
Structural Control ◽  
Base Isolation ◽  
Linear Time ◽  
Time History ◽  
Structural Vibration ◽  
Management Technique ◽  
Base Shear ◽  
Loma Prieta Earthquake ◽  
Lead Rubber Bearing

Earthquakes are measure as one of all nature’s greatest hazards; throughout the historic time they need to cause important loss of life and severe harm to property, particularly to man-made structures. On the opposite hand, earthquakes offer architects and engineers a variety of vital criteria foreign to the traditional style method. during this analysis paper study, base isolation as an associate degree earthquake resisting style technique was used that well dissociate a construction from its substructure and increase flexibility resisting on the bottom vibration areas by providing the isolators. Lead rubber bearing (LRB) isolator could be a passive structural vibration management technique. during this analysis study, unstable behavior of irregularity building in the simple model, re-entrant corner plan irregular model, mass irregular model, and stiffness irregular model are measure configurations with varied frame sections with and while not LRB base isolation was analyzed for the comparative analysis on the idea of base shear, storey shear, stoery displacement, storey drift and storey acceleration with 3 earthquake information, first is Bhuj earthquake, second is Kobe Japan earthquake, and third is Loma Prieta earthquake analysis is done by E-TABS 18.0.20software. Non-linear time history analysis and for design purpose of a base-isolated system and for seismic design of isolated structure consistent with IS 1893 (part 1):2016 and UBC 1997.

scholarly journals Active Tuned Mass Dampers for Control of Seismic Structures

2020 ◽  
Vol 19 ◽  
Keyword(s):  
Active Control ◽  
Structural Control ◽  
Structural Vibrations ◽  
Tuned Mass Dampers ◽  
Strong Earthquakes ◽  
Future Studies ◽  
Mass Damper ◽  
Strong Winds ◽  
Error Method ◽  
Better Than

Structural control has been implemented to major structures that are exposed to excitations which have random vibration behavior including strong winds, traffics and especially ground accelerations resulting from strong earthquakes. It is possible to apply passive and active control methods. In passive, structures are controlled via additional mechanical components, while and external force generating by a powered motor is needed for active control. In the practice of this study, active tuned mass dampers (ATMDs) are used to reduce vibration and responses of structures. The parameters of Proportional-Integral-Derivative (PID) type controllers used in ATMD was found via trial-error method, while mechanical properties of mass damper are optimized via metaheuristic algorithm called Jaya Algorithm. The results were compared with passive tuned mass damper (TMD) and uncontrolled structure. The tuned ATMD is effective to reduce structural vibrations better than TMD. In future studies, both mechanical and controller parameters can be optimized via metaheuristic algorithms.

scholarly journals Vibration suppression of structures using tuned mass damper technology: A state-of-the-art review

2021 ◽  
pp. 107754632098430
Author(s):  
Fan Yang ◽  
Ramin Sedaghati ◽  
Ebrahim Esmailzadeh
Keyword(s):  
Mathematical Modeling ◽  
Vibration Suppression ◽  
State Of The Art ◽  
Optimization Procedure ◽  
Tuned Mass Damper ◽  
Structural Vibration ◽  
Practical Realization ◽  
Reliable Operation ◽  
Mass Damper ◽  
Structural Vibration Suppression

To date, considerable attention has been paid to the development of structural vibration suppression techniques. Among all vibration suppression devices and techniques, the tuned mass damper is one of the most promising technologies due to its mechanical simplicity, cost-effectiveness, and reliable operation. In this article, a critical review of the structural vibration suppression using tuned mass damper technology will be presented mainly focused on the following four categories: (1) tuned mass damper technology and its modifications, (2) tuned mass damper technology in discrete and continuous structures (mathematical modeling), (3) optimization procedure to obtain the optimally designed tuned mass damper system, and (4) active tuned mass damper and semi-active tuned mass damper with the practical realization of the tuned mass damper technologies.

Modified sliding mode control of a seismic active mass damper system considering model uncertainties and input time delay

2016 ◽  
Vol 24 (6) ◽  
pp. 1051-1064 ◽  
Author(s):  
Mehdi Soleymani ◽  
Amir Hossein Abolmasoumi ◽  
Hasanali Bahrami ◽  
Arash Khalatbari-S ◽  
Elham Khoshbin ◽  
...  
Keyword(s):  
Structural Control ◽  
Sliding Mode ◽  
Test Structure ◽  
Dynamic State ◽  
Shake Table ◽  
Model Uncertainties ◽  
Actuator Dynamics ◽  
Active Structural Control ◽  
Mass Damper ◽  
Active Mass Damper

Model uncertainties and actuator delays are two factors that degrade the performance of active structural control systems. A new robust control system is proposed for control of an active tuned mass damper (AMD) in a high-rise building. The controller comprises a two-loop sliding model controller in conjunction with a dynamic state predictor. The sliding model controller is responsible for model uncertainties and the state predictor compensates for the time delays due to actuator dynamics and process delay. A reduced model that is validated against experimental data was constructed and equipped with an electro-mechanical AMD system mounted on the top storey. The proposed controller was implemented in the test structure and its performance under seismic disturbances was simulated using a seismic shake table. Moreover, robustness of the proposed controller was examined via variation of the test structure parameters. The shake table test results reveal the effectiveness of the proposed controller at tackling the simulated disturbances in the presence of model uncertainties and input delay.

The Effect of Electromagnetic Vibration on the Structure Control of A356 Alloy

2007 ◽  
Vol 539-543 ◽  
pp. 329-332 ◽  
Author(s):  
Jung Pyung Choi ◽  
Tae Woon Nam ◽  
Eui Pak Yoon
Keyword(s):  
Structural Control ◽  
Eutectic Silicon ◽  
A356 Alloy ◽  
Low Frequency ◽  
Primary Aluminum ◽  
Magnetic Flux Density ◽  
Structure Control ◽  
Electromagnetic Vibration ◽  
Fine Fiber ◽  
Electro Magnetic

The structural control of A356 alloy, which was not studied among various electromagnetic processing of materials, was considered applying the alternating current and direct current magnetic flux density. The main aim of the present study is to investigate the effects of electromagnetic vibration on the macro and microstructure of A356 alloy in order to develop a new process of structural control in A356 alloy. When the electromagnetic vibration is conducted for changing the shape of primary aluminum, at low frequency (≤60Hz), the shape of dendrite is changed speroidal shape. When the electromagnetic vibration is conducted for changing the shape of eutectic silicon, a morphological change of the eutectic silicon from coarse platelet flakes to fine fiber shape is observed with EMV (Electro Magnetic Vibration) process at high frequency (≥500Hz).

Developments in Structural Optimization and Applications to Intelligent Structural Vibration Control

2007 ◽  
pp. 101-121 ◽  
Author(s):  
Faruque Ali ◽  
Ananth Ramaswamy
Keyword(s):  
Vibration Control ◽  
Control Systems ◽  
Intelligent Control ◽  
Structural Control ◽  
Structural Engineering ◽  
Real Life ◽  
Fuzzy Rule ◽  
Structural Vibration ◽  
Rule Base ◽  
The Subject

The chapter introduces developments in intelligent optimal control systems and their applications in structural engineering. It provides a good background on the subject starting with the shortcomings of conventional vibration control techniques and the need for intelligent control systems. Description of a few basic tools required for intelligent control such as evolutionary algorithms, fuzzy rule base, and so forth, is outlined. Examples on vibration control of benchmark building and bridge under seismic excitation are presented to provide better insight on the subject. The chapter provides necessary background for a reader to work in intelligent structural control systems with real-life examples. Current trends in the research area are given and challenges put forward for further research.

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