Next-Generation Skyscraper Prototype “Regenerative Tree”

Aiming for a new standard in skyscrapers promoting decarbonization and diverse work styles

With the average global temperature expected to rise by 1.5 degrees by the early 2030s, there is a strong need to significantly reduce "whole life carbon" associated with buildings in order to achieve a carbon-free society. Concurrently, there is growing demand for wellness-oriented workplaces that allow people to choose the location and environment according to their working style, while also promote communication with others and with nature. Architectural plans must also be adaptable to meet contemporary needs and facilitate renovation work.

The “Regenerative Tree” is a realistic building model that addresses these problems through an integrated approach to architectural, structural, and MEP design. Our aim is to develop a versatile prototype, that sets a new standard for super-high-rise office buildings, not a special case. It is estimated that incorporating these elements can reduce the prototype’s whole-life carbon emissions by up to 40%. The characteristic features are as follows.

Optimizing the frame structure and using timber for the perimeter

CO2 emissions are significantly reduced by optimizing the structure. Intermediate columns and seismic-resistant braces are incorporated to support long-span beams and reduce steel usage. Timber is adopted for the perimeter frame, and cross-laminated timber (CLT) is used for the office slabs to minimize building weight. A seismic isolation system further decreases steel requirements by mitigating seismic shaking.

Applying biomimicry for high environmental performance

Biomimetic technology was actively introduced to thoroughly simplify and improve the environmental performance of MEP planning. The heat recovery system mimics the "Wonder net," a mechanism that prevents drops in body temperature by exchanging heat between the arteries and veins. Evaporative cooling by spraying water is modeled after the human body's sweating thermoregulation function, while natural ventilation and lighting draw inspiration from the spiral phyllotaxis of plants, which evolved for photosynthesis.

Additionally, as part of an efficient people flow plan, local elevators that stop at each floor are being replaced with a new system combining shuttle elevators, which are suitable for long-distance transportation, with escalators, which are suitable for mass transit. This will enable a significant reduction in electricity consumption while maintaining transportation capacity.

Planning for diverse work styles

A central void, “stepped floors,” and spiraling shared spaces are created to accommodate diverse workstyles. These spaces differ from conventional, homogenous single-floor spaces, embrace nature, and foster a variety of activities. The central void is an expandable MEP route and can function as a construction logistics route when the building's use changes.

Project Details

Project name: Regenerative Tree (Next-Generation Skyscraper Prototype)

Purpose: Office, commercial
Site area: Approx. 8,000 sqm.
Total floor area: Approx. 100,000 sqm.
Eave height/maximum height: 148m
Number of floors: 35 above ground, 2 below ground
Lead architect: NIKKEN SEKKEI LTD
Main scope: Architectural design
Image credit: NIKKEN SEKKEI LTD