scholarly journals EVALUATION OF PASSIVE CONTROL SYSTEM FOR WOODEN HOUSES : VERIFICATION OF SUMMATION RULE AND EVALUATION OF DYNAMIC PROPERTIES BY SHAKING TABLE TESTS

2014 ◽  
Vol 20 (45) ◽  
pp. 539-544
Author(s):  
Toshiaki SATO ◽  
Takenori HIDA ◽  
Jun KATO ◽  
Michio IGUCHI ◽  
Yuichi MASAKI ◽  
...  
Keyword(s):  
Control System ◽  
Passive Control ◽  
Dynamic Properties ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Summation Rule

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.

Comparative dynamic investigation of cross-laminated wooden panel systems: Shaking-table tests and analysis

2017 ◽  
Vol 21 (10) ◽  
pp. 1421-1436 ◽  
Author(s):  
Viktor Hristovski ◽  
Violeta Mircevska ◽  
Bruno Dujic ◽  
Mihail Garevski
Keyword(s):  
Energy Dissipation ◽  
Earthquake Engineering ◽  
Dynamic Properties ◽  
Seismic Energy ◽  
Experimental Tests ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Equivalent Viscous Damping ◽  
Cross Laminated Timber ◽  
Engineering Seismology

Cross-laminated timber has recently gained great popularity in earthquake-prone areas for construction of residential, administrative, and other types of buildings. At the Laboratory of the Institute of Earthquake Engineering and Engineering Seismology in Skopje, comparative full-scale shaking-table tests of cross-laminated timber panel systems have been carried out as a part of the full research program on the seismic behavior of these types of wooden systems, realized by Institute of Earthquake Engineering and Engineering Seismology, Skopje, and the Faculty of Civil and Geodetic Engineering (UL FCG), University of Ljubljana. Two different specimens built of cross-laminated timber panels have been tested: specimen containing a pair of single-unit principal wall elements (Specimen 1) and specimen containing a pair of two-unit principal wall elements (Specimen 2). In this article, the results from the shaking-table tests obtained for Specimen 2 and numerically verified by using appropriate finite element method–based computational model are discussed. Reference is also made to the comparative analysis of the test results obtained for both specimens. One of the most important aspects of the research has been the estimation of the seismic energy-dissipation ability of Specimen 1 and 2, via calculation of the equivalent viscous damping using the performed experimental tests. It is generally concluded that Specimen 2 exhibits a similar rocking behavior as Specimen 1, with similar energy-dissipation ability. Both specimens have manifested slightly different dynamic properties, mostly because Specimen 2 has been designed with one anchor more compared to Specimen 1. Forced vibration tests have been used for identification of the effective stiffness on the contacts for Specimen 2. This research is expected to be a contribution toward clarification of the behavior and practical design of cross-laminated timber panel systems subjected to earthquake loading.

Shaking table tests on reinforced concrete frames without and with passive control systems

2005 ◽  
Vol 34 (14) ◽  
pp. 1687-1717 ◽  
Author(s):  
Mauro Dolce ◽  
Donatello Cardone ◽  
Felice C. Ponzo ◽  
Claudio Valente
Keyword(s):  
Reinforced Concrete ◽  
Control Systems ◽  
Passive Control ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Concrete Frames ◽  
Reinforced Concrete Frames

Shaking table test study on the seismic isolation effect of a hybrid passive control system

Measurement ◽  
2020 ◽  
Vol 164 ◽  
pp. 108125
Author(s):  
Qiaoyun Wu ◽  
Huichao Yan ◽  
Hongping Zhu ◽  
Xixuan Bai
Keyword(s):  
Control System ◽  
Seismic Isolation ◽  
Passive Control ◽  
Shaking Table Test ◽  
Shaking Table ◽  
Isolation Effect ◽  
Test Study

scholarly journals Optimal Damper Slip Force for Vibration Control Structures Incorporating Friction Device with Sway-Rocking Motion Obtained Using Shaking Table Tests

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Kazutaka Shirai ◽  
Akari Nagaoka ◽  
Nami Fujita ◽  
Takeshi Fujimori
Keyword(s):  
Vibration Control ◽  
Passive Control ◽  
Shaking Table ◽  
Steel Plates ◽  
Shaking Table Tests ◽  
Control Structures ◽  
Mean Square Response ◽  
Rocking Motion ◽  
Slip Force

In this study, a series of shaking table tests were conducted using a specimen that consisted of a superstructure, incorporating a friction device and a sway-rocking mechanism under the superstructure to determine the optimal damper slip force of a passive vibration control system considering the effects of sway-rocking motion. The adopted simple friction device, composed of rubber bands and stainless steel plates, allowed the magnitude of the slip force to be easily set. The optimal slip force of the friction device, which minimizes the peak and root-mean-square response of the superstructure subjected to earthquakes, was determined from the shaking table tests. Based on the results, the optimal slip force of the friction device was found to vary according to the input level of the ground motions and the sway-rocking conditions. The obtained results suggest that the effect of sway-rocking motion should be considered in the design of passive control structures and the determination of their optimal damper slip force.

Shaking Table Tests of a Full Scale Steel Structure Isolated With MFPS

2003 ◽  
Author(s):  
C. S. Tsai ◽  
Tsu-Cheng Chiang ◽  
Bo-Jen Chen
Keyword(s):  
Earthquake Engineering ◽  
Stress Responses ◽  
Passive Control ◽  
Base Isolation ◽  
Experimental Results ◽  
Shaking Table ◽  
Element Formulation ◽  
Shaking Table Tests ◽  
Pendulum System ◽  
Residual Displacements

The base isolation, a kind of passive control technology, has been proved as a very efficient way to ensure the safety of a structure during severe earthquakes both from theoretical study and experimental effort. In general, the base isolation can be classified into two groups, which are sliding type and elastomeric type isolator. In this study, a new base isolator called as Multiple Friction Pendulum System (MFPS) has been proposed. The lubricant material, articulated slider and doubled concave sliding interfaces of MFPS are quite different from that proposed by V. Zayas in 1987. In this study, the MFPS isolator has been equipped beneath each column of a three-story structure at the National Center for Research on Earthquake Engineering to demonstrate its seismic resistance capability. The experimental results from shaking table tests of the 1940 El Centro, 1995 Kobe and 1999 Chi-Chi earthquake show that the proposed isolator can reduce the undesirable seismic response of the structure by lengthening the fundamental period of the structure during earthquakes. The experimental results indicate that the acceleration response of each floor can be lessened significantly as compared with those of the bare structure, and that the stress responses of structural components are limited in the certain range during severe earthquakes. Furthermore, the residual displacements of base isolators are negligible. Therefore, it is shown evidently that the proposed isolator can always bring the base-isolated structure to its initial position after an earthquake. Based on the previous observations, the proposed isolator can be adopted as an effective tool for upgrading the seismic resistibility of a structure. A finite element formulation for the MFPS is also proposed to simulate its mechanical behavior during earthquakes.

Shaking table tests to simulate earthquake responses of passive control structures

2017 ◽  
pp. 431-436
Author(s):  
Michio Yamaguchi ◽  
Satoshi Yamada ◽  
>Masayoshi Nakashima ◽  
Akira Wada
Keyword(s):  
Passive Control ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Control Structures
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