Results 31 to 40 of about 39,462 (278)

Shaking Table Tests of Curved Bridge considering Bearing Friction Sliding Isolation

open access: yesShock and Vibration, 2016
Specific to severe damage to curved bridges in earthquakes caused by the excessive force of the fixed bearings and piers, a new seismic design method on curved bridges considering bearing friction sliding isolation is proposed in this paper.
Lei Yan   +3 more
doaj   +1 more source

New design of electrostatic mirror actuators for application in high-precision interferometry [PDF]

open access: yes, 2015
We describe a new geometry for electrostatic actuators to be used in sensitive laser interferometers, suited for prototype and table top experiments related to gravitational wave detection with mirrors of 100 g or less.
Bergmann, G.   +4 more
core   +2 more sources

Design Principles of Seismic Isolation

open access: yes, 2012
In earthquake resistance design of structures, two general concepts have been used. The first is to increase the capacity of the structures to resist the earthquake load effects (mostly horizontal forces) or to increase the dynamic stiffness such as the seismic energy dissipation ability by adding damping systems (both devices and/or structural fuses).
Lee, George C., Liang, Zach
openaire   +3 more sources

Study on Sensitivity of Uncertainty Factors in Seismic Demand Analysis of Continuous Girder Bridges with Seismic Isolation Design

open access: yesApplied Sciences
In order to clarify the influence of the uncertain parameters of a bridge numerical model for seismic isolation design on the calculation results of structural seismic demand and to improve the accuracy of bridge seismic isolation design, a refined ...
Ruotong Wang, Meng Liu, Junjie Wang
doaj   +1 more source

Demystifying the Barriers and Motivators for the Adoption of Base Isolation Systems in New Zealand

open access: yesBuildings, 2022
A base isolator is a proven system that can significantly reduce any damage to a building in the event of an earthquake. Despite their efficacy, seismic isolators are not widely used in New Zealand, with only about forty systems in use during the 2010 ...
Temitope Egbelakin   +3 more
doaj   +1 more source

Quasi-monolithic mirror suspensions in ground-based gravitational wave detectors [PDF]

open access: yes, 2018
At the commencement of a new era in astrophysics, with added information from direct detections of gravitational-wave (GW) signals, this paper is a testament to the quasi-monolithic suspensions of the test masses of the GW detectors that have enabled the
van Veggel, Anna-Maria
core   +1 more source

Detector Description and Performance for the First Coincidence Observations between LIGO and GEO [PDF]

open access: yes, 2003
For 17 days in August and September 2002, the LIGO and GEO interferometer gravitational wave detectors were operated in coincidence to produce their first data for scientific analysis.
A. Ageev   +411 more
core   +3 more sources

Seismically Isolating a Structure: A Rational Approach for Feasibility Assessment and Definition of Basic Parameters

open access: yesEng
Although conceptually simple, the application of seismic isolation can pose dangerous pitfalls. It is based on decoupling the dynamic response of a structure from the ground motion by inserting isolation devices at its base.
Concetta Tripepi   +2 more
doaj   +1 more source

Semi-actively Implemented Non-linear Damping for Building Isolation Under Seismic Loadings

open access: yesFrontiers in Built Environment, 2020
It is well-known that semi-active solution can achieve building isolation with much less energy requirements than active solutions. Also, it has been shown in previous studies that compared to linear damping, non-linear damping performs better for ...
Yun-Peng Zhu   +3 more
doaj   +1 more source

Subtraction of Newtonian Noise Using Optimized Sensor Arrays [PDF]

open access: yes, 2012
Fluctuations in the local Newtonian gravitational field present a limit to high precision measurements, including searches for gravitational waves using laser interferometers.
Adhikari, Rana X.   +2 more
core   +2 more sources

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