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FOSHAN SHENGBANG STEEL STRUCTURE CO.,LTD
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Steel structures buildings are faster in construction, versatile,simpler in structural behavior. Con is just economy and the insaneprecision required.It is extremely rare to see prestressing (meanexternal post-tensioning) in steel structures for the following reasons.
1) Steel is already extremely costly (you don't want to add cost of prestressing + anchorages to it)
2) Prestress does not last forever (creep, relaxation loss of prestressand corrosion protection will definitely add more recurring costs)
3) It is not cost effective. Unlike RC, having a couple of prestressingtendons will not add a significant capacity to the plastic sectioncapacity of a class 1 steel section. It's much better to go for a highersection.
4) Better alternatives are available. Slim floor construction has manyinnovative approaches to achieve reduced floor thickness. Other than in"repair and rehabilitation" projects, I do not see any application forprestressing in structural steel construction projects. The elasticrange of stresses is increased.
The only examples that I can think of is in the use of Friction Gripbolts for connections where the bolts are pre-torqued. But this is anexample of its use in bolted connections, not for steel construction ingeneral. I have encountered the use of camber in trusses but that is notstrictly a pre-stressed steel structure. Possibly this is being usedabroad.
More informations please view :sbssteelstructure.com/how-can-you-use-prestressed-steel-in-steel-structure-building.html
More informations please view :sbssteelstructure.com/how-can-you-use-prestressed-steel-in-steel-structure-building.html
