Seismic Isolation Floor System "SKID" "SKIDⅡ" Vibration Stage Test

High Performance Two Dimensional Base-Isolation Foundation

The SKID by SENQCIA CORPORATION is a high performance two dimensional base-isolation foundation, which is applicable to the floors of existing buildings, thus resolving those problems. The SKID will realize the introduction of a "base-isolation office".

Test condition on vibration stage

Tests on the vibration stage are continuously conducted.

Performance of base-isolation foundation SKID is confirmed based on the test results and depending on the condition of the earthquake.

Outline of test

Figure of relation between the maximum answering acceleration and the maximum Input acceleration Figure of relation between the maximum answering acceleration and the maximum Input acceleration
Test date
April 2004
Test location
Vibration stage at the Institute of Industrial Science, University of Tokyo
Input seismic wave
Original wave and floor answering wave of the following seismic wave
Input acceleration
El Centro wave (Imperial Valley Earthquake)
Hachinohe harbor wave (Tokachi-Oki Earthquake)
Tohoku University 1st Floor (Miyagi-Oki Earthquake)
Kobe marine observatory wave (Hyogoken-Nambu Earthquake)
Vibration input number
Approximately 120 waves

Test Result

Input Wave: EL CENTRO (NS direction)

Imperial Valley earthquake [Answering wave on the 5th floor of a 5-storied RC building]

SKID-AN
(With Restoration mechanism)
SKID-AR
(Without Restoration mechanism)
Input acceleration Maximum acceleration: 716gal
Acceleration (gal)
Time (sec)
Maximum acceleration: 697gal
Acceleration (gal)
Time (sec)
Answering acceleration Maximum answering acceleration: 94gal
Acceleration (gal)
Time (sec)
Maximum answering acceleration: 140gal
Acceleration (gal)
Time (sec)
Relative displacement Maximum answering displacement: 12.5㎝
Displacement (㎝)
Time (sec)
Maximum answering displacement: 9.5㎝
Displacement (㎝)
Time (sec)

Input Wave: Tohoku University 1st Floor (NS direction)

Miyagi-Oki Earthquake [Answering wave on the 5th floor of a 5-storied RC building]

SKID-AN
(With Restoration mechanism)
SKID-AR
(Without Restoration mechanism)
Input acceleration Maximum acceleration: 766gal
Acceleration (gal)
Time (sec)
Maximum acceleration: 852gal
Acceleration (gal)
Time (sec)
Answering acceleration Maximum answering acceleration: 114gal
Acceleration (gal)
Time (sec)
Maximum answering acceleration: 147gal
Acceleration (gal)
Time (sec)
Relative displacement Maximum answering displacement: 16.8㎝
Displacement (㎝)
Time (sec)
Maximum answering displacement: 15.7㎝
Displacement (㎝)
Time (sec)

Video

Experiment of base-isolation foundation SKID (Video)

The test condition of the base-isolation foundation SKID can be seen by the video.

Tohoku University 1st Floor (Miyagi-Oki Earthquake)
Input Wave Answering wave on the 5th floor of a 5-storied RC building
Input acceleration Horizontally 760gal (one direction), Vertically 370 gal
Kobe marine observatory wave (Hyogoken-Nambu Earthquake)
Input Wave Answering wave on the 5th floor of a 5-storied RC building
Input acceleration Horizontally 700gal (one direction), Vertically 350 gal
El Centro wave (Imperial Valley Earthquake)
Input Wave Answering wave on the 5th floor of a 5-storied RC building
Input acceleration Horizontally 710gal (one direction), Vertically 380 gal
Hachinohe harbor wave (Tokachi-Oki Earthquake )
Input Wave Answering wave on the 5th floor of a 5-storied RC building
Input acceleration Horizontally 590gal (one direction), Vertically 320 gal

Delivery Case Studies of Raised Floor System

Densan. Co., Ltd. New head office building

Our floor system for under-floor air-conditioning (Bifu) was chosen for the floors of this stylish building.

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