1. Preface
In recent years, the public’s appreciation for building aesthetics has steadily increased, leading to the emergence of complex spatial structures with unconventional shapes. Steel structures have become widely adopted in these designs due to their excellent load-bearing capabilities. However, the rise of complex spatial steel structures presents new challenges for structural engineers. Simplifying, modeling, analyzing, designing, and drafting these structures is an urgent issue that requires solutions.
This article explores the entire process of analyzing and designing complex spatial steel structures, drawing on existing engineering experience as well as valuable insights from review and construction teams. It summarizes several analysis and design methods that can serve as useful references for professionals working with these types of structures.
2. Overview of Complex Spatial Structures
Spatial structures differ from traditional layered structures, as they cannot be fully represented through simple plans, elevations, or sections in construction drawings. Components of complex spatial structures experience three-dimensional stress states and typically feature large spans and intricate forms. These structures employ specialized systems to address stress challenges that conventional beam and column elements cannot efficiently solve.
Common types of spatial structures include grid structures, suspension structures, shell structures, pipe truss structures, and membrane structures. These systems can accommodate various building requirements, such as different spans and support conditions. They also adapt well to diverse architectural plans and façades, including squares, rectangles, polygons, circles, sectors, triangles, and combinations thereof.
Moreover, spatial structures are known for their lightweight yet aesthetically pleasing appearance, making them ideal for large public buildings such as stations, airports, and sports centers.
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