Application of Key Construction Techniques for Long-Span Steel Structures

Long-span steel structures represent a construction form developed through the gradual evolution of steel structure systems. This type of structural construction method fully meets the requirements of certain large-scale buildings. This paper studies the construction techniques for long-span spatial steel structures, with a focus on quality assurance measures, hoping that these measures can facilitate the smooth execution of steel structure construction.

1.Application of Long-Span Steel Structures
Currently, the maximum span achieved in China is 340 meters. Cable-membrane structures made of membrane materials and steel cables have reached a maximum span of 320 meters. Long-span steel structures are primarily used in public buildings, such as theaters, auditoriums, concert halls, exhibition centers, stadiums, and airports. They are also employed in industrial buildings, such as final assembly workshops for aircraft manufacturing plants. In these applications, long-span steel structures primarily operate under self-weight load conditions, with the main challenge being to reduce the structure’s own weight. Thus, long-span steel structures are most suitable for such purposes.

2.Key Technical Issues in Long-Span Steel Structure Construction
Modern long-span steel structures present numerous technical challenges during construction, many of which are quite complex. These include:

Tracking simulation methods and calculations during the construction process.

Mechanical issues and calculations related to pulleys.

Stability calculations for structures and components.

Safety analysis and issues during support removal.

Analysis and impact of temporary support columns on structural safety.

Forming calculations and issues for flexible structures.

Overall lifting calculations and design for long-span structures.

Tracking simulation methods and calculations for the entire process of prestressed tensioning.

3.Construction Methods for Long-Span Spatial Steel Structures
When determining the construction plan for long-span spatial steel structures, the mechanical characteristics and structural features at various construction stages must be fully considered. Under the premise of ensuring construction quality and structural safety, factors such as construction progress, economic benefits, and available technical conditions and equipment resources should be comprehensively evaluated to select appropriate construction measures. Currently, common construction methods for long-span spatial steel structures include:

High-altitude piecewise assembly method.

Sectional lifting method.

Integral lifting and integral jacking method.

Sliding method.

In recent years, through extensive technological innovation and engineering practice, domestic and international engineers have proposed some new construction methods, such as the “folding and unfolding” integral lifting method and the high-altitude curved sliding method.

With 30 years of expertise in the field of long-span steel structures, LFBJMB has successfully completed numerous landmark projects. Leveraging its robust technical capabilities, the company offers comprehensive services ranging from design to operation and maintenance. For more information, we welcome your inquiries.