UDC 624.074.434 UDC 624.016

COMBINED DESIGN OF A LONG-SPAN BUILDING Combined Design of a Long-Span Building

Published in Proceedings of Petersburg Transport University · Volume 23, Issue 3, 2026 · Pages 764–775 · Rubric: GENERAL TECHNICAL PROBLEMS AND SOLUTION APPROACH
DOI: https://doi.org/10.20295/1815-588X-2026-3-764-775
Received: 20.05.2026 Accepted: 27.06.2026 Published: 07.10.2026 Language of publication: RUS
Authors
Objective: to develop a combined design of a large-span building, including for use in transport, such as railway stations, canopies, embankments, stadiums, sports facilities, etc., which has increased rigidity, reliability, and resistance to progressive collapse while reducing material consumption. Methods: analysis of large-span structures, development of an innovative solution for the frame of a large-span building, and calculation of the frame using a software package. Results: known structures of long-span buildings and structures do not always have high rigidity, resistance to progressive collapse, and are often uneconomical in terms of material consumption. For the frames of buildings and structures with large spans, including those in the transport sector, metal structures with high strength and architectural expressiveness are mainly used. However, the use of classical solutions for metal structures for the frames of buildings and structures is very expensive. The Department of Building Structures, Buildings, and Structures at PGUPS is developing innovative structures using steel concrete. An innovative combined design of a saddle-shaped building (structure) on a rectangular or oval plan has been developed and calculated. This design consists of parallel arches in the direction of the object's width, with a variable lift that increases towards the ends of the object, and a series of parallel rigid cables in the direction of the object's length, which are connected to the arches at their intersection points, forming a saddle-shaped spatial large-span roof. The arches are made using tubular profiles, have a through section of 2 lower (internal) belts, 1 upper (external) belt filled with concrete, and a lattice. The arches at the ends of the object have an outward slope and are reinforced with half-timbered posts. The rigid cables are made of metal pre-stressed I-beams. The upper (external) belt of the end arches is fixed with pre-stressed ties, and the supporting parts of the arches are connected with pre-stressed ties. The proposed innovative design has been calculated, and the reduction in material consumption and increase in rigidity have been determined. Practical significance: the effectiveness of the use of combined steel-concrete structures in the frames of large-span buildings is established. The proposed building frame design has a reduced steel consumption of 16 % while increasing the rigidity by 8 % in comparison with the known designs of metal frames of large-span buildings. The combined design of the saddle-shaped roof can be used in railway stations, canopies, quays, and other transport facilities.
long-span roofs, saddle-shaped roofs, buildings and structures, metal structures, combined structures, steel concrete, load-bearing capacity, rigidity, progressive collapse
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