Xiangjiang Eye ETFE Membrane Structure | Landmark Riverfront Architecture
Project Details
- Project Name: Xiangjiang Eye
- Location: Changsha, China
- Structure Type: Double-layer ETFE Membrane Structure
- Application: Amphitheater / City Landmark Landscape
- Project Size: 10,000sqm
- Completion Date: 2022
- Function:Cultural Reception Hall & Urban Landmark
Architectural Concept: A Dynamic Structure Inspired by Nature
The design concept of Xiangjiang Eye comes from the lotus flower.
The movable roof structure allows the building to transform between open and enclosed conditions.
When opened, the roof creates an outdoor environment connected with the surrounding landscape.
When closed, it provides a protected space suitable for different events and public activities.
This combination of flexibility and architectural expression makes Xiangjiang Eye a representative example of modern ETFE membrane architecture.
Why ETFE Membrane Was Selected for Xiangjiang Eye?
The project uses a double-layer ETFE membrane system for the external petal structures.
ETFE was selected because it provides a balance between lightweight construction, transparency control, and long-term durability.
Key advantages include:
Lightweight Architectural Envelope
Compared with traditional glass or metal systems, ETFE membrane structures significantly reduce structural weight.
This allows architects to create large-scale dynamic forms with more flexibility.
Controlled Transparency and Visual Effect
The low-transparency ETFE membrane creates a soft lighting environment while maintaining the visual identity of the landmark.
By adjusting ETFE printing and layer configurations, designers can achieve different levels of light transmission and shading performance.
Weather Resistance and Durability
ETFE membrane materials provide excellent resistance against:
- UV radiation
- Rain
- Environmental aging
- Temperature variation
This makes ETFE suitable for long-term outdoor architectural applications.
Natural Ventilation and Open Space Experience
The movable membrane roof allows the building to adapt to different weather conditions.
The combination of ETFE membrane technology and mechanical movement creates a flexible public space between architecture and nature.
Engineering Features of the ETFE Membrane System
Large-scale landmark membrane structures require precise coordination between membrane materials, supporting structures, and mechanical systems.
For Xiangjiang Eye, the engineering design focused on:
Dynamic Roof Operation
The movable roof system enables the structure to change between open and enclosed states, creating different spatial experiences.
Lightweight Structural Design
The ETFE membrane reduces overall structural load while allowing the creation of complex architectural geometries.
Long-Term Outdoor Performance
The membrane system was engineered to maintain stable performance under changing outdoor environmental conditions.
Applications of ETFE Membrane Architecture
ETFE membrane structures are widely used in:
- Landmark buildings
- Amphitheater roofs
- Stadium structures
- Transportation facilities
- Commercial architectural envelopes
- Public landscape projects
The Xiangjiang Eye demonstrates how ETFE technology can extend beyond traditional roofing applications and become an important element of modern landmark architecture.
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