Bosai Solution ID : JBP00011

Seismic Damping Structure/ Seismic Isolation Structure
Enables continuous use of facilities＜ Downloaded from www.bosai-jp.org ＞

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Hazard
Earthquake

Solution Purpose
Prevention & Mitigation

Solution Theme
Research & Investigation Risk Assessment Disaster Prevention Plan Infrastructure Technology Building
Technology Evaluation

Technology Subject
Site Investigation Impact & Damage Simulation Legislation & Technical Regulations Mitigation Plan
Urban Design & Construction of Resilient Building Resilience Improvement on Existing Building
Mitigation Measures for Interior & Facility Post Disaster Evaluation

Advantages
For buildings that require continuous use of facilities from a BCP perspective, such as facilities thatserve as disaster prevention bases and facilities that are of high social importance, we propose
earthquake-resistant grades that meet customer needs and have the latest systems. High seismic safety
is ensured with vibration and seismic isolation technology.

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Background
While demand for new construction projects is declining in mature, modern societies, there is a growing
need for renovation of existing buildings, including improvements to their earthquake resistance, as themarket changes into a European/American pattern.
We will go on delivering the design and engineering abilities we have built up over many years, together
with outstanding service, as we continue to propose attractive renovations based on the client’sperspective.

Exposition of the Solution
The long-cycle ground motion that was a problem in the Great East Japan Earthquake greatly amplifies
shaking through resonance, particularly in super high-rise buildings. This project is an expansion ofACTY Osaka in the Osaka Terminal Building, our design, which was completed in 1983. In expanding
the building, which had become structurally non-compliant with the amendment of the BuildingStandards Act, we used the coupled vibration control approach, which connects the expanded
structural frame and the existing structural frame, which have differing vibration characteristics, throughoil dampers(coupling dampers). This method enabled us to minimize earthquake resistancereinforcement of the existing structural frame. Furthermore, we were able to keep the dimensions of theexpansion joints between the new and old structural frames within 450mm, which is within the range of＜ Downloaded from www.bosai-jp.org ＞

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common dimensions. This enabled us to raise the vibration damping performance of the building as awhole against various predicted ground motions, including long-cycle ground motion.

Achievements of Examples
・Osaka Station City South Gate Building(Refer to Main Image)
By coupled vibration control, simultaneously realizing earthquake resistance reinforcement andextension of existing super high-rise buildings.
・Hyogo Prefectural Awaji Medical Center
Precast prestressed concrete seismic isolation buildings.

・Tokyo International Airport New Control Tower
Super high-rise reinforced concrete mid-story isolation structure.

・Nihonbashi Tax Office
Renovation with seismic isolation retrofit.

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YASUI ARCHITECTS & ENGINEERS, INC.
2-4-7, Shima-machi, Chuo-ku, Osaka 540-0034, Japan Tel. : +81-6-6943-1371
 E-mail : kouji-muramatsu@yasui-archi.co.jp
 Website : https://www.yasui-archi.co.jp/en/＜ Downloaded from www.bosai-jp.org ＞

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