scholarly journals Development of the Shaking Table and Array System Technology in China

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Chun-hua Gao ◽  
Xiao-bo Yuan
Keyword(s):  
Experimental Technique ◽  
Shaking Table Test ◽  
Material Selection ◽  
Status Quo ◽  
Shaking Table ◽  
Experimental Simulation ◽  
Control Technique ◽  
Developmental Trend ◽  
Maximum Acceleration ◽  
Advantages And Disadvantages

Shaking table is important experimental equipment to carry out antiseismic research. Research, conclusion, comparison, and analysis concerning the developmental history, constructional situation, performance index, control algorithm, and experimental technique of the internal shaking table were reviewed and compared. Such functional parameters as internal shaking table’s table-board size, bearing capacity, working frequency, and maximum acceleration were given. Shaking table’s constructional status quo and developmental trend were concluded. The advantages and disadvantages of different control algorithms were contrastively analyzed. Typical shaking table test, array system tests, and experimental simulation materials were induced and contrasted. Internal existing shaking table and array system test’s structural type, reduced scale, and model-material selection were provided. Analysis and exposition about the developmental tendency of shaking table’s enlargement, multiple shaking tables array, full digitalization, and network control were made. The developmental direction, comparison of technical features, and relevant research status quo of shaking table with high-performance were offered. The result can be reference for domestic or overseas shaking table’s design and type selection, control technique, and research on experimental technique.

Study on Seismic Isolation and Hi-Frequency Vibration Isolation Technology for Equipment in Nuclear Power Plant Using Aero Floating Technique

2020 ◽  
Author(s):  
Kiyotaka Takito ◽  
Osamu Furuya ◽  
Hiroshi Kurabayashi ◽  
Kunio Sanpei
Keyword(s):  
Nuclear Power ◽  
Seismic Isolation ◽  
Vibration Isolation ◽  
Shaking Table Test ◽  
Base Isolation ◽  
Ground Surface ◽  
Shaking Table ◽  
Maximum Acceleration ◽  
Seismic Motion ◽  
Floating Base

Abstract In Japan, most structures on the ground surface need seismic countermeasures because of frequently earthquakes. On the other hand, vibration isolation devices are applied to precision or important equipment in several facilities that dislikes vibration in order to reduce daily vibration. In general, vibration isolation devices are intended for high frequency and small amplitude range. However, it is difficult to cut off both vibration region caused by flying object collision and seismic motion with existing technologies. The authors propose insulation of equipment and vibration transmitted through the floor by floating equipment, and have. We have devised and built an air floating device that operates when a trigger input is applied to save the energy of this dynamically acting device. It was estimated by numerical calculation that the aero floating device keeps lifting stably in the condition with the air pressure in the auxiliary air chamber about 75 to 80 kPa. The performance specifications of the proposed device were verified from shaking table test. As a result, the effect of reducing the maximum acceleration by about 1/5 against the seismic motion of El Centro NS, Taft NS, Tohoku NS, and Hachinohe EW was confirmed by floating the mass on the frame assuming the equipment. From the obtained power spectrum diagram (PSD) of the response acceleration, it was confirmed that all frequency components up to 25 Hz is reduced by using proposed aero floating base isolation device.

scholarly journals Seismic Behavior of Stone Pagoda Structure by Shaking Table Test

2021 ◽  
Vol 13 (9) ◽  
pp. 5314
Author(s):  
Ho-Soo Kim ◽  
Dong-Kwan Kim ◽  
Geon-Woo Jeon ◽  
Sang-Sun Jo ◽  
Se-Hyun Kim
Keyword(s):  
Seismic Behavior ◽  
Shaking Table Test ◽  
Seismic Energy ◽  
Shaking Table ◽  
Seismic Resistance ◽  
Permanent Displacement ◽  
Maximum Acceleration ◽  
Weak Earthquake ◽  
Gyeongju Earthquake ◽  
Stone Pagoda

In general, the stone pagoda structures with discontinuous surfaces are vulnerable to lateral forces and are severely damaged by earthquakes. After the Gyeongju earthquake in 2016 and the Pohang earthquake in 2017, numerous stone pagoda structures were damaged due to slippage, rotation, and the separation of stacked stone. To evaluate seismic resistance of masonry stone pagoda structures, we analyzed the seismic behavior of stone pagoda structures using the shaking table test. Shaking frequency, permanent displacement, maximum acceleration, rocking, and sliding were assessed. Responses to simulations of the Bingol, Gyeongju, and Pohang earthquakes based on the Korean seismic design standard (KDS 41 17 00) were analyzed for return periods of 1000 and 2400 years. We found that the type of stylobate affected the seismic resistance of the stone pagoda structure. When the stylobates were stiff, seismic energy was transferred from lower to upper regions of the stone pagoda, which mainly resulted in deformation of the upper region. When the stylobates were weak, earthquake energy was absorbed in the lower regions, which was associated with large stylobate deformations. The lower part of the tower body was mainly affected by rocking, because the structural members were slender. The higher part of the stone pagoda was mainly affected by sliding, because the load and contact area decreased with height.

Fiber Reinforced Concrete Frame Shaking Table Test

2014 ◽  
Vol 893 ◽  
pp. 597-601
Author(s):  
Guo Wang Meng ◽  
Jia Mei Zhou ◽  
Chuan Yi Sui ◽  
Qi Yan
Keyword(s):  
Reinforced Concrete ◽  
Failure Modes ◽  
Shaking Table Test ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Shaking Table ◽  
Maximum Strain ◽  
Fiber Reinforced ◽  
Reinforced Concrete Frame ◽  
Maximum Acceleration

Two full scale frames were tested on a shaking table to investigate seismic performance and fracture mechanism of fiber reinforced concrete in contrast to the plain concrete. The information about acceleration response, the maximum strain value as well as the time to reach it, the typical strain - time curves and the crack development of two test frames were presented. Test results indicate that reinforced concrete did not crack during the test; the fiber reinforced concrete could better absorb or consume energy in the process of stress redistribution after peak acceleration; maximum strain and maximum acceleration did not occur at the same time; structure came into being deformation even failure when the seismic energy in the structure gone up to certain extent, and the dynamic failure would be their main failure modes.

scholarly journals Seismic Behavior of Stone Pagoda Structure by Shaking Table Test

2021 ◽  
Author(s):  
Ho-Soo Kim ◽  
Dong-Kwan Kim ◽  
Geon-Woo Jeon ◽  
Sang-Sun Jo ◽  
Se-Hyun Kim
Keyword(s):  
Seismic Behavior ◽  
Shaking Table Test ◽  
Seismic Energy ◽  
Shaking Table ◽  
Seismic Resistance ◽  
Permanent Displacement ◽  
Maximum Acceleration ◽  
Weak Earthquake ◽  
Gyeongju Earthquake ◽  
Stone Pagoda

In general, the stone pagoda structures with discontinuous surfaces are vulnerable to lateral forces and are severely damaged by earthquakes. After the Gyeongju earthquake in 2016 and the Pohang earthquake in 2017, the earthquakes damaged numerous stone pagoda structures due to slippage, rotation and the separation of stacked stone. To evaluate seismic resistance of masonry stone pagoda structure, we analyzed the seismic behavior of stone pagoda structure using shaking table test. Shaking frequency, permanent displacement, maximum acceleration, rocking, and sliding were assessed. Responses to simulations of the Bingol, Gyeongju, and Pohang earthquakes based on Korean seismic design standard (KDS 41 17 00) were analyzed for return periods of 1,000 and 2,400 years. We found that the type of stylobate affected the seismic resistance of stone pagoda structure. When the stylobates were stiff, seismic energy was transferred from lower to upper regions of the stone pagoda, which mainly resulted in deformation of the upper region. When the stylobates were weak, earthquake energy was absorbed in the lower regions; this was associated with large stylobate deformations. The lower part of tower body was mainly affected by rocking, because the structural members were slender. The higher part of the stone pagoda was mainly affected by sliding, because the load and contact area decreased with height.

scholarly journals Shaking Table Test on the Tunnel Dynamic Response under Different Fault Dip Angles

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1375
Author(s):  
Duan Zhu ◽  
Zhende Zhu ◽  
Cong Zhang ◽  
Xinghua Xie
Keyword(s):  
Dynamic Response ◽  
Inclination Angle ◽  
Shaking Table Test ◽  
Material Selection ◽  
Sine Wave ◽  
Tunnel Lining ◽  
Shaking Table ◽  
Water Diversion ◽  
Peak Strain ◽  
Strain Data

Fault-crossing tunnels are often severely damaged under seismic dynamics. Study of the dynamic response characteristics of tunnels crossing faults is thus of great engineering significance. Here, the Xianglushan Tunnel of the Central Yunnan Water Diversion Project was studied. A shaking table experimental device was used, and four sets of dynamic model tests of deep-buried tunnels with different fault inclination angles were conducted. Test schemes of model similarity ratio, similar material selection, model box design, and sine wave loading were introduced. The acceleration and strain data of the tunnel lining were monitored. Analysis of the acceleration data showed that when the input PGA was 0.6 g, compared with the ordinary tunnel, the acceleration increases by 117% when the inclination angle was 75°, 127% when the inclination angle was 45°, and 144% when the inclination angle was 30°. This indicates that the dynamic response of the cross-fault tunnel structure was stronger than that of the ordinary tunnel, and the effect was more obvious as the fault dip angle decreased. Analysis of the strain data showed that the strain response of the fault-crossing tunnels was more sensitive to the fault dip. The peak strain and increase in fault-crossing tunnels were much larger than those of ordinary tunnels, and smaller fault dips led to larger increases in the strain peak; consequently, the tunnel would reach the ultimate strain and break down when the input PGA was smaller. Generally, the influence of fault inclination on the dynamic response of the tunnel lining should receive increased consideration in the seismic design of tunnels.

scholarly journals A NEW SEISMIC RESPONSE CONTROL TECHNIQUE FOR BUILDINGS USING BLOCK AND TACKLE

2019 ◽  
Vol 29 (2) ◽  
Author(s):  
Taiki Saito
Keyword(s):  
Control System ◽  
Seismic Response ◽  
Shaking Table Test ◽  
Core Structure ◽  
Shaking Table ◽  
Control Technique ◽  
Response Control ◽  
Seismic Response Control ◽  
High Rise ◽  
The Core

The author proposed a new seismic response control system using a block and tackle (hereinafter, referred to as a dynamic pulley damper system) developed especially for the high-rise buildings. The proposed system has a configuration where a damper is installed on the track of the cable-stayed wire, amplifying the amount of movement of the wire by using a movable pulley that increases the damping effect to reduce the vibration of a building. we apply this system to connect the core structure (parking tower) and the surrounding frame (housing part) of a high-rise building. This system aims to reduce the earthquake response of the building by the force of the damper attached to the core structure. To verify the effectiveness of this response control system, two types of shaking table tests were conducted; one is the large-scale shaking table test using a magnetic damper, an-other one is the small-scale shaking table test using a steel damper. The mathematical model of the dynamic pulley damper system to implement the frame analysis was developed and the results of simulation analysis are compared with the experiments.

FRACTURE OF BEAM-TO-COLUMN CONNECTIONS SIMULATED BY FULL-SCALE SHAKING TABLE TEST AND EVALUATION OF DEFORMATION CAPACITY

2002 ◽  
Vol 67 (560) ◽  
pp. 181-188 ◽  
Author(s):  
Yuka MATSUMOTO ◽  
Satoshi YAMADA ◽  
Ken OKADA ◽  
Masatoshi IDE ◽  
Toru TAKEUCHI ◽  
...  
Keyword(s):  
Shaking Table Test ◽  
Full Scale ◽  
Shaking Table ◽  
Deformation Capacity ◽  
Test And Evaluation
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