Guangzhou Steel tells you: the main characteristics of prestressed steel structure
① full and repeated use of elastic strength steel magnitude, thereby enhancing the structure bearing capacity.
Non-prestressed bearing structure starting from zero stress reaches the material design strength f is terminated by force, its carrying capacity is N1; and prestressed bearing structure began in effect force f01, which carries the N2 and N3, apparently N3> N2> N1 ;
② improved stress state constitution, to save steel. For example, the section flexural members moment can be prestressed into an axis tension, the peak moment Mmax fell to M'max% 26shy ;, so that the member section to narrow down the amount of steel.
③ improve the structure rigidity and stability, improve various properties of construction.
Prestressed structural deformation and deformation structure produced by the reverse often under load, and thus construct stiffness can be improved. Since Tendon Disposition tectonic boundary conditions change, so improve structural stability. Prestressing can be adjusted to improve the structure of cyclic stress and fatigue strength characteristics. Reduced weight due to declining construction seismic loads, improve seismic performance. Guangzhou Steel
Economic Benefits
Economy and construction of prestressed steel structural system, Tendon Disposition program and process many factors, the nature and intensity of the load, structure and node configuration, device methods and materials prices and so on. Under normal circumstances, an non-prestressed prestressing steel construction steel construction Tension single choice can save 10-20% of steel; repeatedly Tension up to 20-40%. The innovation system construction of prestressed and non prestressed savings compared to the traditional steel structure several times to several times. In short, the potential strength of construction materials, the higher selection prestressed economic benefits. For example, in solid web beam centroid axis Nearby there are a lot of strength potential. After selection of prestressed lattice girder its economic year is much higher.
Engineering
Overseas Project Name (Year Built) Domestic Economy Project Name (year of completion) economy 1 Belgium Brussels hangar (1953) 12% provincial rate Taiyuan Steel mills coal trestle (1959) 5% 2 Steel province before Russia Rostov Don highway bridge steel ratio (1959) province 11% -18% rate ninghe Stadium Steel (1984) province 11% -12% 3 Chicago International Airport hangar (1960) Steel provincial rate of 11% -12% Beijing Asian Games Chaoyang Gymnasium steel consumption 52.2kg / m24 Seoul Olympic tournament hall (1996) the amount of steel 14.6kg / m2 Panzhihua City in Sichuan Province, 38 percent steel ratio Stadium 5 Atlanta Olympic tournament hall (1996) steel consumption 11-38kg / m2 taeco airport hangar province steel ratio of 11% -12% as well as the 21th World Cup Football Museum, the Olympic badminton hall, the Olympic table tennis and so on. Guangzhou Steel
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