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A series of full-scale shaking experiments on a precast and post-tensioned concrete (PPC) structure were conducted to establish high-quake-resistant, productive and reparable concrete buildings. And also experiments on a reinforced concrete (RC) structure with almost the same shape of the PPC structure were conducted to acquire usable data for the future development of seismic design method.     

In the experiments, both of the PPC structure and the RC structure were shaken at the same time (the PPC structure at the front and the RC structure at the back of the video). As for the two 4-story buildings, the story height of each floor was 3.0 m, and the long side of the rectangular plane was 14.4 m and the short side was 7.2 m.


Outline of the experiment is shown here: (20101213.pdf)

Test date: December 13, 2010
Imposed ground motions: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 50%
Video: (20101213_jmak50_pc.wmv)

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Shaking experiments of damage free reinforced concrete bridge pier were conducted at E-Defense. The bridge pier specimen was designed based on the current design specifications, however, the specimen had two special attributes, one was a new material, polypropylene fiber mixed reinforced cementitious composite, used to enhance the ductility capacity of the pier base where the severe damage occurs under strong excitation and the other was 0.4 m round corners in a square cross-section of the pier specimen.
The pier specimen was 7.5 m tall and its foundation was 7.0 m long, 7.0 m wide and 1.8 m tall. Weight of superstructure was 310 tons. Shaking experiments were conducted for three days. The specimen was subjected to JR Takatori record (1995 Hyogoken-Nanbu Earthquake) with varying amplitude.
Small cracks were found at the base of the pier specimen after design level excitation, which was expected result. After that the specimen was excited twice same as before simulating aftershocks, it developed large crack but covering concrete of the new material did not spall off. It was clarified that damage free bridge pier with the new material enhanced seismic performance.

Outline of the experiment is shown here:(20100226.pdf)
 
Day 2

Test date: February 26, 2010
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake)
1st excitation: JR Takatori record 100%
2nd excitation: JR Takatori record 100% (20100226_100.wmv) / (20100226_sw.wmv)

 Day 3
Test date: March 2, 2010
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) with varying amplitude
1st excitation: JR Takatori 100%
2nd excitation: JR Takatori 125%
3rd excitation: JR Takatori 125%
4th excitation: JR Takatori 125% (20100302_n.wmv) / (20100302_sw.wmv)

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NIED and the Council to Promote Wood Oriented Architecture conducted collapse experiments to verify the design method for 3-story Wood Houses by Post and Beam conventional Japanese wood houses under the support of Ministry of Land, Infrastructure, Transport and Tourism.
There were two specimens (specimen 1, specimen 2), both of which were 3-story wood houses with the same specifications including floor area and height of each floor except design of joint parts. In the experiment, damage and behavior of specimens under strong earthquake were confirmed by inputting a synthetic ground motion in one direction.

Outline of the experiment is shown here: (20091027.pdf)

Test date: October 27, 2009

Imposed ground motions: Synthetic ground motion 160%
Panoramic view of back side (20091027.wmv)

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The test structure was designed to reproduce the seismic response of an 80-m-tall, 21-story building. The lower four stories of the test structure were constructed as an actual steel frame. Substitute layers, which consisted of concrete slabs and rubber bearings, were placed above the steel frame to simulate the 5th to 21st floors of the building. The structure was subjected to a series of synthetic long-period ground motions: one for Tokyo from a scenario Tokai earthquake and another for Nagoya from a scenario Tokai-Tonankai earthquake.

Outline of the experiment is shown here:
(091223siryou1.pdf) / (091223siryou2.pdf).


Excitation case 1
Test date: September 15, 2009
Imposed ground motions: Synthetic ground motion for Nagoya from a scenario Tokai-Tonankai earthquake
Overall view of test structure (200909_case1-4.wmv)
Steel frames in lower part (200909_case1-12.wmv)
Brace steel damper (200909_case1-19.wmv)
Steel damper in upper substitute layer (200909_case1-24.wmv)
Meeting room on the roof level corresponding to 19th floor (200909_case1-room.wmv)                  

Excitation case 2
Test date: September 18, 2009
Imposed ground motions: Synthetic ground motion for Nagoya from a scenario Tokai-Tonankai earthquake
Overall view of test structure (200909_case2-4.wmv)
Steel frames in lower part
(200909_case2-12.wmv)
Brace steel damper (200909_case2-19.wmv)
Meeting room on roof level corresponding to 19th floor (200909_case2-room.wmv)                  

Excitation case 3
Test date: September 25, 2009
Imposed ground motions: Synthetic ground motion for Nagoya from a scenario Tokai-Tonankai earthquake
Overall view of test structure (200909_case3-4.wmv)
Steel frames in lower part (200909_case3-12.wmv)
Oil brace damper (200909_case3-19.wmv)
Office room on roof level corresponding to 19th floor (200909_case3-room.wmv)

Excitation case 4
Test date: October 2, 2009
Imposed ground motions: Synthetic ground motion for Nagoya from a scenario Tokai-Tonankai earthquake
Overall view of test structure (200909_case4-4.wmv)
Dining room on roof level corresponding to 19th floor (200909_case4-room.wmv)

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This experiment was conducted under the international collaborative research agreement between NIED and the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES). Participants comprised US researchers from Stanford University and the University of Illinois and Japanese researchers from NIED, Tokyo Institute of Technology, Hokkaido University, and the private sector.
The objective of the experiment was to evaluate the dynamic properties of a new structural system named the Controlled-Rocking Frame. The study focused on the self-centering mechanism of the system and the performance of the energy absorbing devices. The test specimen is seen in the video as a two-dimensional frame painted in yellow. Six horizontal-mass devices referred to as testbeds, three of which piled up on each side of the test structure, delivered inertia to the specimen. The specimen was subjected to unidirectional motions (JMA Kobe and Northridge record) with varying amplitude.

Outline of the experiment is shown here:(20090819.pdf)

Test date: August 10, 2009

Imposed ground motions: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 65%
FUSE-A1 (20090810A1.wmv)

Relevant sites in NEES:
http://cee-neesmrit1.cee.illinois.edu/controlledRockingWebsite/trunk/Index.php

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As a part of international collaborative research of NIED and the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES), a shaking table experiment on a full-scale 7-story wood building was conducted by NEESWood, which is responsible for study in wood structure at NEES, (PI: Professor John W. van de Lindt, Colorado State University) and NIED. The first story of the test structure was a steel frame simulating a basement parking area. The 2nd to 7th stories were the residential area constructed by the wood-frame structure. The test structure was 12.4 m wide, 18.4 m long and 20.4 m high. In the experiment, the seismic motion recorded at Canoga Park during 1994 Northridge earthquake was used. The test structure was shaken by the 180% of the seismic motion, and the response of the structure under the severe input motion was investigated.

Outline of the experiment is shown here: (20090714.pdf)

Test date: July 14, 2009
Imposed ground motions: Canoga Park record (1994 Northridge earthquake) 180%
Panoramic view from obliquely upward (20090714_1.wmv)
Inside of a room on the 7th floor (20090714_2.wmv)

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The performance enhancement by damping devices was examined in a full-scale, 5-story, steel moment-resisting frame building. Validation of supplemental damping systems was needed because these systems have never been exposed to a major earthquake event. The building was tested under five conditions: with steel, viscous, oil, and viscoelastic dampers, and without dampers. Nonstructural elements (cladding, ceiling, partition walls) were installed to simulate a realistic office building. The JR Takatori record was used with various amplitudes. 

Outline of the experiment is shown here: (20090305.pdf)

Test date: March 5, 2010
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%,
Steel damper (20090305.wmv)

Test date: March 12, 2010
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Viscous damper
(20090312.wmv)

Test date: March 19, 2010
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Oil damper (20090319.wmv)

Test date: March 27, 2010
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Viscoelastic damper (20090327.wmv)

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 The total view of the specimen

Shaking table experiments had been conducted to evaluate ability of functional maintenance of medical facilities under earthquake disaster.
A full-scale 4-story reinforced concrete building specimen simulating a hospital which contained a stuff station, a dialysis room, an operating room and a patient’s room each furnished with real medical equipment and furniture was set up to reproduce function of the medical facility more faithfully.
Two hospitals of different kind of structure each, one for a base-fixed structure and the other for a seismic isolated structure, were compared and evaluated their functional maintenance by shaking table experiments. Comparative video of the experiments shows risk of the aseismic hospital and ability of functional maintenance of the seismic isolated hospital under a near fault earthquake ground motion.
But even a seismic isolated structure which widely reduces damages against earthquake in general can be exposed to risk by long-period, long-duration earthquake ground motion such as synthetic ground motion for Sannomaru area, Nagoya from a scenario Tokai-Tonankai earthquake if one fails to take earthquake countermeasures.
Results of the experiments are going to be used to upgrade ability of functional maintenance of medical facilities in the future.

The movement of the unlocked rollaway bed

Outline of the experiment is shown here: (20081225.pdf)

Test Date: December 2008 & January 2009
Imposed ground motion:
(1)
JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 80%, near fault earthquake,
(2) Synthetic ground motion for Sannnomaru area, Nagoya from a scenario Tokai-Tonankai earthquake

Comparative video of aseismic and a seismic isolation structure (20090122.wmv)

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NIED and Japan Housing and Wood Technology Center had conducted shaking table experiments on creation of design method and performance validation project of Traditional Wooden Houses under the support of Ministry of Land, Infrastructure, Transport and Tourism.
There were two test specimens (House A and B) in this experiment. They were two 2-story wood-framed houses built in a traditional manner. The modules and floor area and height of each story were not the same for both specimens but the floor plans were almost the same. In the experiment, by inputting a ground motion such as observed ground motion of the 1995 Hyogoken-Nanbu Earthquake, damage and behavior of the specimens under strong earthquake were confirmed.


Outline of the experiment is shown here: (20081128.pdf)
Report of outcome (to external site) 

House B
House A

Test date: November 28, 2009                 
Imposed ground motion: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 100%
Panoramic view from front side of House B (20081128.wmv) 

Test date: December 4, 2009
Imposed ground motion: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 100%
Panoramic view from front side of House A (20081204.wmv)

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A shake table experiment of full-scale RC bridge pier was conducted.The pier was designed as a reinforced concrete bridge column which built in 1970’s and it had termination of longitudinal bars at the mid-height of the pier. The pier had a circular section with a diameter of 1.8 m and the height of the pier was 7.5 m. Its foundation was 7.0 m by 7.0 m and 1.8 m tall. The weight of superstructure was about 300 tonf.
Based on the experiment, progress of the damage, which is similar with the damage of the reinforced concrete piers collapsed during the 1995 Hyogoken-Nanbu Earthquake, was reproduced and taken its data.

Test data Outline of the experiment is shown here: (20081002.pdf)

Test date: October 2, 2008
Imposed ground motion:
JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Video: (20081002.wmv
)

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A shake table experiment of full-scale RC bridge pier was conducted.
The pier was designed as a reinforced concrete bridge pier based on the current designed code and it had a circular section with a diameter of 2.0m and the height of the pier was 7.5m. Its foundation was 7.0m by 7.0m and 1.8m tall. Weight of superstructure was about 310t. The pier was excited for 2 days.
As the result, it was found that the reinforced concrete bridge pier based on current design code has enough ductility capacity for 1995 Hyogoken-Nanbu Earthquake.

Outline of the experiment is shown here: (20080826.pdf) / (20080902.pdf)

Test date: August 26, 2008
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake)
1st excitation : JR Takatori 100%
2nd excitation : JR Takatori 100% (20080826.wmv)

Test date: September 2, 2008                  
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) with varying amplitude
1st excitation: JR Takatori 100%
2nd excitation: JR Takatori 125%

3rd excitation: JR Takatori 125% (20080902.wmv)

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A test structure to investigate the seismic performance of high-rise steel buildings represented a 21-story and 80-m-tall building corresponding to average high-rise buildings. The test structure was comprised of the lower part of full-scale 4-story steel frame structure and the higher part of substitute layers. The substitute layers were prepared in order to represent the seismic responses generated in 5th to 21st floors of the model building. The steel frame was designed and constructed in reference to the past design materials. Imposed ground motions were a synthetic ground motion for simulating the metropolitan area from a scenario Tokai earthquake and a synthetic ground motion for Nagoya from a scenario Tokai-Tonankai earthquake
Outline of the experiment is shown here: (20080321.pdf)

Test date: March21, 2008
Imposed ground motions: Synthetic ground motion for Nagoya from a scenario Tokai-Tonankai earthquake
Panoramic view (front) (20080321_w11.wmv)
Panoramic view (skew) (20080321_w22.wmv)
Joint, bond part, member (20080321_w33.wmv)


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A large-amplitude floor response of a high-rise building was reproduced by using 5-story steel frame test structure with two amplifying layers comprised of rubber bearings and concrete slab.
Realistic conditions of residential room as well as office room were reproduced and a tuned synthetic ground motion was input to the shaking table. The large-amplitude floor response corresponding to the maximum displacement of 1.5 m was reproduced in the test structure of 5-story frame. The response of the test structure was tuned to represent the floor response of the 30th floor of a 30-story high-rise building which was subjected to synthetic ground motion for Nagoya from a scenario Tokai-Tonankai earthquake. Dangerous phenomena in the office room, residential room, kitchen and living room were clarified and the resistant measure prepared in the same type of rooms showed significant improvement in terms of safety.

Outline of the experiment is shown here: (20080124.pdf)
Conclusion paper is shown here: (20080124_kenkyusiryou.pdf)

Test date: January24, 2008
Imposed ground motions: Synthetic ground motion from a scenario Nankai earthquake
Video: (20080124_t1.wmv)

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A shake table experiment of full-scale reinforced concrete bridge pier designed based on 1968 technical criteria was conducted to clarify the failure mechanism which occurred during 1995 Hyogoken-Nanbu Earthquake. In the experiment, the ground motion recorded at JR Takatori station during 1995 Hyogoken-Nanbu Earthquake was imposed.

Outline of the experiment is shown here: (20071213.pdf)

Test date: December 13, 2007
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Video: (20071213.wmv)

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As a part of international collaborative research of NIED and CNR-IVALSA “Istituto per la Valorizzazione del Legno e delle Specie Arboree-Trees and Timber Institute - Firenze ITALY”, a shaking experiment of full-scale 7-story wood structure was conducted. This was a part of SOFIE project, PI : Professor Ario Ceccotti, which was CNR-IVALSA leading project to develop the construction method by cross laminate panel, XLam: 7 cm to 20 cm thick laminated panel made of 2 cm thick piece of wood bonded alternately and thickly without any interspace.
A test structure was timber box-frame construction which was 23.5 m height, 7.5 m width, 15 m depth and total weight 285 tonf. The test structure was shaken by the JMA Kobe record (1995 Hyogoken-Nanbu Earthquake), and the response of the structure under the severe motion was investigated.

Test date: October 23, 2007
Imposed ground motions: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 100%
Panoramic view (skew) (20071023 1.wmv)
7F (inside of the room)(20071023_2.wmv)

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A full-scale 4-story steel building was repeatedly subjected to ground shaking until it collapsed. The building satisfied the minimum requirements prescribed in the current Building Standard Law of Japan. Composite concrete slabs were provided to complete a very realistic structure. The building was furnished with a complete set of nonstructural elements including ALC (AAC) exterior walls, aluminum sash, glass windows, partition walls, and ceiling. The experiment was conducted by increasing the intensity of excitation gradually from small to the strongest motion that the E-Defense can produce.  

Outline of the experiment is shown here: (20070927.pdf)

Test date: September 25, 2007                
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 40%
Video: (20070925.wmv)

Test date: September 27, 2007
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Video: (20070927.wmv)

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A full-scale test structure which was partially extracted from a high-rise building was shaken to reproduce the floor response and story drift. The experiment was conducted in order to clarify those phenomena which may occur in and outside of high-rise buildings under a long-period ground motion. Damage of nonstructural components including exterior wall and ceiling as well as dangerous behavior including overturning and scattering of fixtures and fittings were observed in the test structure. Adopted earthquakes were Nankai earthquake expected in near future and the 1995 Hyogoken-Nanbu earthquake.

Outline of the experiment is shown here: (20070329.pdf)

Test date: March 29, 2007     
Imposed ground motions: Synthetic ground motion from a scenario Nankai earthquake (continued period: 180 seconds)
Video: (20070329.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), a collapse experiment of full-scale wooden houses was conducted. 2 test structures, house C and D whose framework were the same of house A and B tested in November 2005, were built newly. The test structures were constructed based on the previous building standards which were used until 1981 and whose seismic performance was insufficient.
The purpose of the experiment on House C was to investigate the effect of aging on the seismic capacity of wooden house. The purpose of the experiment on House D was to verify the effect of partial seismic reinforcement compared with House B which was considered to be fully reinforced, specifically the lack of the reinforcement at joints.

Outline of the experiment is shown here: (20070228.pdf)

Test date: February 28, 2007
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
1st excitation: JR Takatori 100% (20070228_1.wmv)
2nd excitation: JR Takatori 100% (20070228_2.wmv) 

Test date: March 5, 2007
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
4th excitation: JR Takatori 100% (20070305_4.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), an experiment of full-scale wooden houses built by traditional timber framework method was conducted. The method of the test structures were used to be common before 1950, in which the Japanese Building Standard Law was enacted, and those structures have aseismic elements whose behavior of performance at seismic events were not yet clarified. We focused attention on difference of foundation style, floor stiffness and roof style, and conducted experiments on eccentricity ratio, floor stiffness, roof style and column base style as parameters to validate their impact to aseismic capacity of houses.

Outline of the experiment is shown here: (20070130.pdf)

Test date: February 2, 2007
Imposed ground motions: JMA Kobe recorded (1995 Hyogoken-Nanbu Earthquake) 100%
Video:(20070202.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), a shaking experiment was conducted with a large-scale model composed of caisson type quay walls and pile group in order to perceive lateral spreading phenomenon of the ground induced by liquefaction in coastal areas. About 900 channel sensors were set to clarify ground behavior and failure process of the pile foundation when lateral spreading occurred. Large displacements of the ground and the structures, and significant change of earth pressure and pore water pressure were captured by the sensors.

Test date: December 15, 2006
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 80%
Direction of shaking: horizontal 1 direction and vertical direction
Video: (20061215.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas,” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), shaking table experiments of 3-story reinforced concrete (RC) school buildings was conducted under the leadership of Prof. Toshimi Kabeyasawa of Earthquake Research Institute, the University of Tokyo. The main objectives were to validate input dissipation and seismic retrofit effect. The test specimens were two 3-story RC building structures. One was a bare RC specimen, simulating an old and non-ductile school building. The other was a retrofit specimen, which was constructed in the exactly same design as the bare RC specimen but strengthened with attached steel braces. Those test structures were constructed on a pool-shaped container each which were simulating the flexible boundary condition of the spread foundation and neighborhood soils.

Outline of the experiment is shown here: (20061002.pdf)

(Bare specimen)
Test date: October 2, 2006
Imposed ground motions: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 100%
Video: (20060930.wmv)

(Retrofit specimen)
Test date: November 1, 2006
Imposed ground motions: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 130%
Video: (20061030.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), a series of shaking experiments on pile foundation placed in level liquefiable ground had been conducted by using a cylindrical laminar container to examine behavior of liquefied ground and structural interaction in consequence of shaking. 

Test date: August 25, 2006
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 50%
Direction of shaking: horizontal 2 directions
Video: (20060825.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), a series of shaking experiments was conducted to comprehend lateral spreading phenomena of the ground induced by liquefaction of coastal areas using a large-scale specimen with sheet pile type quay wall and pile group foundation structure. About 900 channel sensors were set in order to clarify ground behavior of lateral spreading and failure process of pile foundation structure under earthquakes. As a result, large displacement of the ground and the structures, and significant change in earth pressure and pore water pressure were observed through the sensors. 

Outline of the experiment is shown here: (20060323.pdf)

Test date: March 23, 2006
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 80%
Direction of shaking: horizontal 1 direction and vertical direction
Video: (20060323.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), a series of shaking experiments on soil-pile foundation interaction was conducted.

Test date: February 24, 2006
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 80%
Video: (20060224.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas,” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), a shaking table experiment of full-scale 6-story reinforced concrete (RC) building had been conducted. The test specimen was 12 m long, 17 m wide, 16 m tall, 6-story building and its weight was around 1,000 tonf which was the heaviest test structure ever since E-Defense started running. The structure was designed based on the code of design and practice in 1970’s. The test specimen was subjected to the record of the 1995 Hyogoken-Nanbu Earthquake and the behavior was studied to obtain necessary data for upgrading earthquake-resistance improvement technology of RC building. 

Outline of the experimental is shown here: (20060110.pdf)

Test date: January 13, 2006

Imposed ground motions: JMA Kobe (1995 Hyogoken-Nanbu Earthquake) 100%
Video: (20060113.wmv) 

Test date: January 16, 2006
Imposed ground motions: JMA Kobe (1995 Hyogoken-Nanbu Earthquake) 60%
Video: (20060116.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), shaking experiment of full-scale wooden houses built before 1981, when the Building Standard Law was revised drastically, was conducted. The test structures were two similar houses chosen by public offering, relocated from Nishiakashi city to E-Defense. Then one was left as it was (House B) and the other was reinforced against earthquake (House A). Both of test structures were shaken at the same time and investigated the differences of their behavior under a large earthquake.  

Outline of the experiment is shown here: (20051121.pdf)

Test date: November 21, 2005                 

Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Video: (20051121.wmv) 

Test date: November 24, 2005
Imposed ground motions: JR Takatori record (1995 Hyogoken-Nanbu Earthquake) 100%
Video: (20051124.wmv)

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As a part of “Special Project for Earthquake Disaster Mitigation in Urban Areas” supported by Ministry of Education, Culture, Sports, Science and Technology (MEXT), shaking experiment on full-scale wooden houses built before WWII was conducted. For their oldness, severe damage is concerned at a large earthquake. The two test structures, one for an actual built house relocated from Kyoto city and the other for a house newly designed and built in the similar timber frame method as one relocated from Kyoto based on new design method were shaken at the same time to clarify their earthquake-resisting capacity.

Outline of the experiment is shown here: (20051110.pdf)

Test date: November 10, 2005
Imposed ground motions: Building Center of Japan Level 2 Seismic Wave (BCJ-L2), unilateral excitation with peak acceleration of 400 gal
Video: (20051110_1.wmv)

Test date: November 11, 2005
Imposed ground motions: JMA Kobe record (1995 Hyogoken-Nanbu Earthquake) 100%
Video
:(20051110_2.wmv)

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