#Japan #Tokyo #Tokyo Stock Exchange #Heiwa Real Estate #D³SKY®-L

Introduction

The Tokyo Stock Exchange has recently completed a significant upgrade aimed at enhancing its earthquake resilience. Spearheaded by Heiwa Real Estate Co., Ltd., along with Mitsubishi Jisho Sekkei and Kajima Corporation, this initiative represents a strategic move to bolster the safety of one of Japan's most critical financial institutions. The installation of the TMD (Tuned Mass Damper) system, specifically the D³SKY®-L model, showcases the integration of advanced seismic technology to improve user safety in high-rise buildings.

Background and Purpose

Originally completed in 1988, the Tokyo Stock Exchange Building has always been regarded as a safe structure. However, with changes in safety regulations and growing concerns for the safety of occupants, the necessity for continual improvements became evident. The goal of this project was to not only adhere to specifications but also enhance the business continuity performance during potential seismic events. This reflects a broader commitment to safety and sustainability within urban development.

Project Details

The D³SKY®-L is a state-of-the-art seismic device designed to reduce vibrations experienced during earthquakes. It operates effectively across a range of seismic waves, from minor tremors to significant quakes. By integrating this dual-direction dynamic damper, both the amplitude of movements and the time duration of noticeable shaking can be substantially decreased, ultimately contributing to a safer environment for all building users.

The installation involved placing two TMD systems, with a combined weight of 800 tons, which were affixed on the building's rooftop utilizing advanced engineering practices. These measures allow the structure to withstand earthquake forces comparable to the latest standards for skyscrapers. Intriguingly, simulations conducted using data from the 2011 Great East Japan Earthquake confirmed that the building's sway can be reduced significantly.

Technical Innovations

One of the standout features of the D³SKY®-L is its design, characterized by a layered rubber configuration. This innovative structure allows the device to sit comfortably below the building’s outer walls, preserving the aesthetic integrity of the building’s exterior. This is a crucial aspect, as maintaining the visual appeal of such an iconic structure is important for architectural heritage.

Contributions of Key Players

Heiwa Real Estate, with over 70 years of experience in urban development, has been central to this project, ensuring top-tier technology was employed in their flagship building. This long-standing dedication to safety and innovation underlines their commitment to creating a sustainable urban landscape in Tokyo.

Mitsubishi Jisho Sekkei, renowned for their over 135 years of architectural design expertise, applied their knowledge to ensure the renovations followed best practices and optimal design principles suitable for such critical infrastructure.

Kajima Corporation, a pioneer in seismic technology since the 1980s, continues to lead in developing solutions like the D³SKY®-L. Their focus on research and the ongoing development of seismic systems reflect a commitment to enhancing the safety and reliability of high-rise buildings globally.

Conclusion

Overall, the earthquake resistance upgrade of the Tokyo Stock Exchange Building is a significant milestone not only for its occupants but also for the future of urban seismic technology. This collaborative project not only ensures a safer operational environment following seismic events but also positions these companies as leaders in enhancing public safety standards. The insights gained from this initiative will undoubtedly contribute to future developments within high-rise constructions, aligning with Japan's commitment to innovation and resilience against natural disasters.

Project Overview

• - Project Name: Earthquake Upgrade at Tokyo Stock Exchange Building
• - Location: Kabutocho, Chuo Ward, Tokyo
• - Duration: December 2023 - September 2025
• - Contractors: Heiwa Real Estate, Mitsubishi Jisho Sekkei, Kajima Corporation
• - Building Details:

- Structure: Steel frame with reinforced concrete sections
- Height: 78.8m, 15 stories above ground and 3 basement levels
- Year of Completion: 1988

With these advancements, the Tokyo Stock Exchange Building is set to not only withstand potential earthquakes but also continue its legacy as a vital element of Japan’s financial and urban landscape.