Tuned Liquid Column Gas Damper in Structural Control

2013 ◽  
pp. 150-179 ◽  
Author(s):  
Markus Hochrainer ◽  
Franz Ziegler
Keyword(s):  
Earthquake Engineering ◽  
Structural Control ◽  
Base Isolation ◽  
Wide Spectrum ◽  
Water Reservoir ◽  
Design Guidelines ◽  
Liquid Column ◽  
Engineering Structures ◽  
Arch Dams ◽  
Gas Damper

Tuned liquid column damper (TLCD) show excellent energy and vibration absorbing capabilities appropriate for applications in wind- and earthquake engineering. The objective of this chapter is to demonstrate the outstanding features of the proposed Tuned Liquid Column Gas Damper (TLCGD) and present its wide spectrum of applications of three design alternatives. Among others it includes base isolation of structures, applications to lightly damped asymmetric buildings and other vibration prone structures like bridges (even under traffic loads) and large arch-dams as well as simple, ready to use design guidelines for optimal absorber placement and tuning. The evident features of TLCGDs are no moving mechanical parts, cheap and easy implementation into civil engineering structures, simple modification of the natural frequency and even of the damping properties, low maintenance costs, little additional weight in those cases where a water reservoir is required, e.g., for the sake of fire fighting, and a performance comparable to that of TMDs of the spring-mass- (or pendulum-)-dashpot type.

Structural control of a fixed offshore structure using a new developed tuned liquid column ball gas damper (TLCBGD)

2019 ◽  
Vol 192 ◽  
pp. 106551 ◽  
Author(s):  
Hamid Hokmabady ◽  
Alireza Mojtahedi ◽  
Samira Mohammadyzadeh ◽  
Mir Mohammad Ettefagh
Keyword(s):  
Structural Control ◽  
Liquid Column ◽  
Offshore Structure ◽  
Gas Damper

scholarly journals A Holistic Strategy for Successful Photovoltaic (PV) Implementation into Singapore’s Built Environment

2021 ◽  
Vol 13 (11) ◽  
pp. 6452
Author(s):  
Vesna Kosorić ◽  
Siu-Kit Lau ◽  
Abel Tablada ◽  
Monika Bieri ◽  
André M. Nobre
Keyword(s):  
Built Environment ◽  
Information Exchange ◽  
Cultural Context ◽  
Wide Spectrum ◽  
Design Principles ◽  
Design Guidelines ◽  
Structural Safety ◽  
Local Context ◽  
Design Framework ◽  
Holistic Strategy

Based on the findings from a recent study by the authors which examined factors affecting diffusion of photovoltaics (PV), while comprehensively considering the local PV and construction industry as well as characteristics of the built environment, this paper proposes a holistic strategy for PV implementation into Singapore’s built environment. It consists of (1) a multilevel mechanism framework, encompassing eleven mechanism categories of instruments and activities and (2) a general design framework including design principles, general project instructions and the main design guidelines. Relying on a survey conducted among PV experts on established mechanisms, the present study suggests that building codes (e.g., fire safety, structural safety, etc.) and initiatives and incentives related to PV/building-integrated photovoltaics (BIPV) should be the highest priority for authorities, followed by assessment of BIPV/PV properties, working toward social acceptance, conducting research projects and information exchange, and education and training activities. Considering all three pillars of sustainability, the design framework is based on the following interrelated design principles: (1) compatibility and coherence with the local context, (2) technical soundness, (3) economic viability, (4) user-centered design, (5) connecting with community and socio-cultural context, and (6) adaptability and flexibility. Despite Singapore’s scarcity of land, the established design guidelines cover a wide spectrum of solutions, including PV integration into both buildings and non-building structures. The synthesis of the two interconnected and inseparable frameworks aims to create an environment conducive to long-term widespread PV integration and stimulate the deployment of BIPV, which should help Singapore and other cities reduce their dependency on imported fossil fuels, while also making them more livable and enjoyable.

Hysteresis Loops of Base Isolation System - An Overview

2021 ◽  
Vol 879 ◽  
pp. 189-201
Author(s):  
M.A. Amir ◽  
N.H. Hamid
Keyword(s):  
Earthquake Engineering ◽  
Structural Damage ◽  
Base Isolation ◽  
Numerical Models ◽  
Hysteresis Loops ◽  
Human Beings ◽  
Rc Buildings ◽  
Isolation System ◽  
Base Isolation System ◽  
Isolation Systems

Recently, there are a lot of technological developments in the earthquake engineering field to reduce structural damage and one of them is a base isolation system. The base isolation system is one of the best technologies for the safety of human beings and properties under earthquake excitations. The aim of this paper is to review previous research works on simulation of base isolation systems for RC buildings and their efficiency in the safety of these buildings. Base isolation decouples superstructure from substructure to avoid transmission of seismic energy to the superstructure of RC buildings. The most effective way to assess the base isolation system for RC building under different earthquake excitations is by conducting experiment work that consumes more time and money. Many researchers had studied the behavior of base isolation system for structure through modeling the behavior of the base isolation in which base isolator is modeled through numerical models and validated through experimental works. Previous researches on the modeling of base isolation systems of structures had shown similar outcomes as the experimental work. These studies indicate that base isolation is an effective technology in immunization of structures against earthquakes.

scholarly journals Investigation of repeatability of digital surface model obtained from point clouds in a concrete arch dam for monitoring of deformations

2013 ◽  
Vol 19 (2) ◽  
pp. 268-286 ◽  
Author(s):  
Kutalmis Gumus ◽  
Halil Erkaya ◽  
Metin Soycan
Keyword(s):  
Water Reservoir ◽  
Point Clouds ◽  
Deformation Monitoring ◽  
Water Levels ◽  
Arch Dam ◽  
Surface Model ◽  
Engineering Structures ◽  
Concrete Arch Dam ◽  
Accuracy Of Measurements ◽  
Laser Scanners

Applicability of Terrestrial Laser Scanners/Scanning (TLS) in deformation measurement in dams is an active area of study. With the advance of modern technology, accuracy of measurements is much improved by developments in design of terrestrial laser scanners. Currently, this technology is used in large and complex engineering structures such as dams. Although TLS is a high cost technology, it is particularly used in monitoring of dam deformations, due to its speed in obtaining thousands of data points, ability to visualize the scanned object and its environment with high accuracy and ability to take long-range measurements. In order to determine the effect of change in water reservoir levels on body of the dam, TLS are used to take deformation measurements in different time intervals, where the water level was at maximum, minimum and medium levels. This paper provides an overview of terrestrial laser scanning technology for deformation monitoring. The concrete arch dam in Antalya Oymapinar, Turkey was used for case study. Four different scannings were performed in this dam in order to verify the replicability of TLS results on same water levels and equivalent conditions. Digital Surface Models reflecting dam surface have been created. Results obtained from surface model differences were examined using surface matching method.

Experimental Study for Highly Plastic Material Damper

2003 ◽  
Author(s):  
C. S. Tsai ◽  
T. T. Wei ◽  
W. S. Chen
Keyword(s):  
Energy Dissipation ◽  
Mechanical Behavior ◽  
Structural Control ◽  
Passive Control ◽  
Base Isolation ◽  
Plastic Material ◽  
New Technology ◽  
Seismic Responses ◽  
New Energy ◽  
The Relationship

Earthquakes can result in terrible disasters. The new technology of structural control has been acknowledged as the better way to reduce the seismic responses of structures during strong ground motions. The passive control that belongs to the structural control technology can be classified into the base isolation and energy dissipation systems. In this study, a new energy dissipation device called as highly plastic material damper has been proposed. This study focuses on testing and exploring the mechanical behavior of the highly plastic damper proposed by the research group in Feng Chia University, Taichung, Taiwan. The damper was tested in the MTS System to sustain cyclic loadings. The tests include the material stability, durability, the relationship between the force and velocity, and the temperature effect on energy dissipation capacity, etc. From experimental results, it is shown that the force-deformation hysteresis loop of the highly plastic material damper looks like an ellipse in shape for small amplitudes, and a quadrilateral shape for large amplitudes. These results express that the mechanical behavior of the highly plastic material damper depends on the velocity in small amplitudes, and on the displacement in large amplitudes. Based on these observations, the highly plastic material damper could be suitable not only for resisting wind loads but also for controlling seismic responses of a structure during earthquakes.

Analysis and Experiment on the Effect of Seismic Protection of Buildings by High Damping Rubber Bearings

2004 ◽  
Author(s):  
Jun-Ping Pu ◽  
C. S. Tsai ◽  
Jian-Fa Huang ◽  
Bo-Jen Chen ◽  
Yao-Min Fang
Keyword(s):  
Earthquake Engineering ◽  
Base Isolation ◽  
Steel Structure ◽  
Shaking Table ◽  
Natural Period ◽  
Rubber Bearing ◽  
High Damping Rubber Bearings ◽  
High Damping Rubber Bearing ◽  
High Damping Rubber ◽  
Rubber Bearings

In recent years, many studies on base isolation strategies and devices have been developed and applied in U. S. A., Europe, Japan, and New Zealand. The high damping rubber bearing belongs to one kind of the earthquake-proof ideas of base isolation technologies. The installation of high damping rubber bearings can lengthen the natural period of a building and simultaneously reduce the earthquake-induced energy trying to impart to the building. The objective of this paper is to investigate the base isolation effect of high damping rubber bearings. The uniaxial, biaxial, and triaxial shaking table tests were performed to study the seismic behavior of a 0.4-scale three-story isolated steel structure in the National Center for Research on Earthquake Engineering in Taiwan. The experimental and analytical results show that the nonlinear mechanical characteristics of the high damping rubber bearings can be reasonably simulated.

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.

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