The cost comparison between space frame buildings and traditional concrete buildings involves multiple factors, including materials, construction, design complexity, and construction period. The following are the main differences and cost analysis between the two.
Material cost
Space frame buildings
Steel: High-strength steel or aluminum alloy is usually used. The unit price of the material is high, but the amount used is relatively small (because the structure is light).
Node components: Customized nodes may increase costs, but industrialized production can reduce some costs.
Enclosure structure: Often combined with lightweight materials (such as glass, metal plates, and composite materials), the cost difference is large.
Traditional concrete buildings
Concrete and steel bars: The unit price of the material is low, but the amount used is large (especially in high-rise buildings, need to increase the cross-sectional size to withstand the load).
Formwork and support: Cast-in-place concrete requires a large number of formwork and temporary supports, with a low reuse rate and high cost.
Construction cost
Space frame building
Factory prefabrication: Components are produced in the factory, quality is controllable, but transportation and lifting costs are high.
On-site installation: Fast construction speed and low labor costs (especially suitable for large spans or complex shapes).
Machinery requirements: Heavy lifting equipment is required, and short-term rental costs are high.
Traditional concrete building
On-site casting: Relying on a large number of workers and formwork support, the construction period is long, and the labor cost is high.
Curing time: Concrete requires a curing period, which prolongs the construction period and indirectly increases costs.
Poor adaptability: The cost of design changes or rework is high.
Design and technical costs
Space frame
Design complexity: accurate calculation of node forces is required, and the design cost is high.
Technical threshold: A professional team is required to conduct BIM modeling and construction coordination.
Concrete building
Standardized design: The traditional design process is mature, and the design cost is low.
Technology popularization: the technical threshold of the construction team is low, and it is easy to find contractors.
Comprehensive cost comparison
| Factors | Space frame building | Traditional concrete building |
| Material cost | High unit price, but low usage | Low unit price, but high usage |
| Construction efficiency | Short construction period (can save indirect costs) | Long construction period (long labor and machinery occupancy time) |
| Large span/high-rise applicability | More economical (light structure, strong span capacity) | Need to increase cross-sectional size, and cost increases |
| Maintenance cost | Low long-term maintenance cost (corrosion resistance treatment) | Conventional buildings, such as residential and office buildings |
| Applicable scenarios | Large span buildings such as stadiums, airports, exhibition halls | Large span buildings such as stadiums, airports, and exhibition halls |
Mechanical properties and structural characteristics
| Dimension | Space structure | Concrete building |
| Strength and rigidity | Steel has high strength (excellent tensile and compressive properties), light weight, and is suitable for large span and high-rise structures. | Concrete has high compressive strength, but low tensile strength (needs to rely on steel bars), heavy weight, and limited span. |
| Toughness and seismic resistance | Steel has good toughness, strong ductility, excellent seismic resistance, and can effectively absorb seismic energy, making it suitable for high-intensity earthquake zones.。 | Concrete has poor toughness and needs to be reasonably reinforced to improve seismic resistance. It is prone to cracking during earthquakes. |
| Self-weight | The self-weight is about 1/3~1/5 of that of a concrete structure, and the foundation requirements are relatively low. | It has a heavy weight (about 2400kg per cubic meter of concrete), and the foundation needs a stronger bearing capacity. |
Typical Case Reference
Space frame: such as Beijing Daxing Airport (large span, short construction period, but high initial investment).
Concrete building: ordinary high-rise residential building (low material cost, but long construction period).
Conclusion
Short-term cost: Traditional concrete buildings are more economical in low-rise, standardized projects.
Long-term value: Space frames are more advantageous in projects with large spans, complex shapes, or tight deadlines, and may have lower life cycle costs (maintenance and energy savings).
Key variables: project scale, local labor costs, and steel/concrete price fluctuations (for example, when steel prices rise, space frame costs rise significantly).
It is recommended to conduct detailed calculations based on specific project requirements (such as function, deadline, and shape) and local market conditions. Yunjoin provides you with professional answers and services.
