Shaking table tests of steel frame with superelastic Cu–Al–Mn SMA tension braces

2015 ◽  
Vol 45 (2) ◽  
pp. 297-314 ◽  
Author(s):  
Yoshikazu Araki ◽  
Kshitij C. Shrestha ◽  
Nao Maekawa ◽  
Yuji Koetaka ◽  
Toshihiro Omori ◽  
...  
Keyword(s):  
Steel Frame ◽  
Shaking Table ◽  
Shaking Table Tests

Shaking Table Tests on a Passive Equipment Isolation System for Earthquake Protection

2009 ◽  
Author(s):  
Maurizio De Angelis ◽  
Salvatore Perno ◽  
Anna Reggio ◽  
Gerardo De Canio ◽  
Nicola Ranieri
Keyword(s):  
Steel Frame ◽  
Shaking Table ◽  
Frame Structure ◽  
Shaking Table Tests ◽  
Isolation System ◽  
Industrial Plants ◽  
Steel Frame Structures ◽  
Rigid Mass ◽  
Passive Isolation ◽  
Steel Frame Structure

The present work refers to steel frame structures in industrial plants. A passive isolation system for seismic protection of a considerable equipment, already present on a frame support structure and rigidly constrained to it, is investigated through both numerical simulations (1+1 DOF system) and shaking table tests on a 1:5 scale two-story steel frame structure. The equipment (e.g. a pipeline, a compressor unit, ...) is modelled as a rigid mass. The optimal design is determined by minimizing the dynamic response of the isolated mass. In order to ensure strenght and serviceability, the response of the frame is also monitored.

scholarly journals Shaking Table Test on Different Positions of Multiple Tuned Liquid Damper

2019 ◽  
Vol 9 (1) ◽  
pp. 5863-5867
Keyword(s):  
Control System ◽  
Wave Breaking ◽  
Passive Control ◽  
Shaking Table Test ◽  
Steel Frame ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Tuned Liquid Damper ◽  
Passive System ◽  
Water Tanks

Earthquake can cause many problems to the structures, which lead to buildings collapse and may takes humans life. It is a nature’s hazard that cannot be stop. One of the effort is by introducing the damping system to the buildings where the energy of the system is slowly reduced until the vibration of the system is totally eliminated and the system is brought to rest. Several techniques are available nowadays, however passive control system has advantage in term of cost compare to other systems. Multiple Tuned Liquid Damper (MTLD) is a passive system that traditionally made of several rigid tanks filled with water, usually placed on top of a building. The energy will dissipates through the sloshing and wave-breaking of the liquid once the earthquake strike the buildings. Shaking table tests are carried out on a two-bay, two-story steel frame with water tanks for different location. In this test, the displacement and acceleration for top and base are studied.

Research on Shaking Table Test of Base and Story Isolation Structures

2014 ◽  
Vol 580-583 ◽  
pp. 1776-1781
Author(s):  
Guo Chen Zheng ◽  
Hang Li Xu
Keyword(s):  
Natural Vibration ◽  
Shaking Table Test ◽  
Steel Frame ◽  
Shaking Table ◽  
Seismic Structure ◽  
Shaking Table Tests ◽  
Frame Model ◽  
Isolation Layer ◽  
Damping Effect ◽  
Scale Down

The shaking table tests are conducted on a 5-floor steel frame model with a scale down of 1:6. The traditional anti-seismic structure and isolation structures with isolation layer in different position are adopted. The results indicate that the natural vibration periods of isolation structure are longer than anti-seismic structure, and when the isolation layer is located in a lower position, the period becomes longer and the damping effect is better.

scholarly journals EXPERIMENTAL STUDIES OF A STEEL FRAME MODEL WITH AND WITHOUT BUCKLING-RESTRAINED BRACES

2016 ◽  
pp. 33-52 ◽  
Author(s):  
Héctor Guerrero Bobadilla ◽  
Tianjian Ji ◽  
José Alberto Escobar
Keyword(s):  
Free Vibration ◽  
White Noise ◽  
Experimental Studies ◽  
Steel Frame ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Frame Model ◽  
Seismic Input ◽  
Low Intensity ◽  
Vibration Tests

This paper presents comparative experimental studies of a five-storey steel-frame model at a scale of 1/10 with, and without, buckling-restrained braces (BRBs). The building model was subjected to free vibration tests and shaking table tests. The latter were conducted using low-intensity white noise and seismic input. From the free vibration tests and shaking table tests with low-intensity white noise, it was found that the BRBs contributed a significant amount of damping. This happened to the model even at low levels of vibration. The shaking table tests with seismic input were conducted using seven earthquake records, taken in the lakebed zone of Mexico City with seismic intensities from pga=0.1g to 0.25g. At an intensity of pga=0.1g, the results show that the model fitted with BRBs had a significantly smaller response than the bare model, in terms of displacement, inter-storey drift, floor velocity and floor acceleration. The higher intensities were only applied to the model fitted with BRBs. The results indicate that the model with BRBs was able to withstand about 2.5 times the seismic intensity of the bare model, in terms of lateral displacement, inter-storey drift and Arias Intensity, as a measure of the energy contents of the movement. At the end of the tests, all BRBs were removed and the model remained in its original undamaged state.

Shaking table tests of a two-story unbraced steel frame

2007 ◽  
Vol 63 (3) ◽  
pp. 412-421 ◽  
Author(s):  
Seung-Eock Kim ◽  
Dong-Ho Lee ◽  
Cuong Ngo-Huu
Keyword(s):  
Steel Frame ◽  
Shaking Table ◽  
Shaking Table Tests

scholarly journals Shaking Table Tests and Validation of Multi-Modal Sensing and Damage Detection Using Smartphones

Buildings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 477
Author(s):  
Ruicong Han ◽  
Xuefeng Zhao
Keyword(s):  
Data Storage ◽  
Wavelet Packet ◽  
Steel Frame ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Cross Sectional ◽  
Civil Infrastructures ◽  
Acceleration Data ◽  
Damage States

Structural health monitoring (SHM) systems using modal- and vibration-based methods, particularly wireless systems, have been widely investigated in relation to the monitoring of damage states in civil infrastructures such as bridges and buildings. Unlike many current efforts in developing wireless sensors, one can instead leverage the suite of sensors, network transmission, data storage, and embedded processing capabilities built into modern smartphones for SHM. The objective of this work was to assess and validate the use of smartphones for the monitoring of artificial damage states in a three-story steel frame model subjected to shaking table-induced earthquake excitations. The steel frame was a 2D structure with six rotary viscous dampers installed at the beam–column joints, which were used for simulating different damage states at their respective locations; the columns were also replaced with ones of reduced cross-sectional areas to further emulate damage. In addition to instrumenting the frame with conventional tethered sensors, Apple iPhones (pre-loaded with customized smartphone apps to record acceleration and inter-story displacement) were also installed. Shaking table tests were then conducted on the undamaged and damaged frames, while conventional sensors’ and smartphones’ responses were collected and compared. Wavelet packet decomposition was employed to analyze the acceleration data to detect damage in two different cases. Structural displacements were also computed from acceleration measurements and compared with displacement measurements to further validate the quality of smartphone sensor measurements.

scholarly journals Low-cost hybrid design of masonry structures for developing countries: Shaking table tests

2021 ◽  
Vol 146 ◽  
pp. 106675
Author(s):  
Anastasios Tsiavos ◽  
Anastasios Sextos ◽  
Andreas Stavridis ◽  
Matt Dietz ◽  
Luiza Dihoru ◽  
...  
Keyword(s):  
Developing Countries ◽  
Low Cost ◽  
Shaking Table ◽  
Hybrid Design ◽  
Masonry Structures ◽  
Shaking Table Tests
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