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China-aids-Ghana Coast Cape Stadium Project

China-aids-Ghana Coast Cape Stadium Project

China-aids-Ghana Coast Cape Football Stadium Project.

The Cape Coast Stadium project is located in Cape Coast city, the capital of the Central Province of Ghana. The plane size of the grandstand is 214m×188m, with a total of 15,000 seats for spectators. Among them, the steel structure canopy is set on the west main stand, covering an area of about 6600m².

The cantilever stadium roof design of the steel structure canopy in this project is a stadium roof truss design system composed of a main arch, rear arch, and secondary truss. The stadium roof truss design is carried out in accordance with the relevant codes of the People’s Republic of China. The design reference period and design service life are 50 years. The structural safety grade is level 2 and the structural importance coefficient is 1.0.

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Overview

Project name	Ghana Coast Cape Steel Structure Stadium Grandstand Canopy
Covered area	6600m²
Stadium Roof Structure Structural system	Space steel truss system
Tolerance	±10%
Roofing	Steel Color Sheet
Material	Q235B/Q355B,45#,40Cr
Processing Service	Bending, Welding, Decoiling, Cutting, Punching
Usage	50 Years

Structural system and its characteristics

1. Football stadium roof structure is composed of a steel tube truss main arch, annular rear arch, and radial roof secondary truss. Support columns are arranged under the annular rear arch, as shown in the figure.

Schematic diagram of the canopy steel structure

2. The theoretical calculation span of the main arch is 226m, the vector height is 35.5m, the Angle between the arch plane and the horizontal plane is 68°, the arch foot is on the ground and universal spherical hinge support is adopted. The rear arch is supported by 10 columns, the column spacing is 18 ~ 36m, and the arch feet do not fall to the ground but are connected to the main arch; The rear arch and the main arch are connected by secondary trusses.

3. The main arch, rear arch, and secondary trusses are triangular trusses. The main arch is an equilateral triangle truss, and the height of the truss decreases gradually from the middle span to the foot of the column. Inverted triangle trusses are used in the rear arch and secondary trusses. The steel structure is made of Q345B steel, and its various rods are cut. See table for surface specifications.

Rod section size /mm

position	chord	abdominal rod
main arch	Ø813 x 20 ~ Ø813 x 26	Ø273 × 10 ~Ø219 × 12
back arch	Ø356 x 10 ~ Ø356 x 18	Ø168 ×6~Ø273 × 10
secondary truss	Ø273 x 20 ~ Ø325 x 24	Ø168 ×6~Ø168× 10