Prestressed Structure
Updated 2026-09-11
INTRODUCTION
English translation pending.
CORE DEFINITION
A prestressed structure has internal stress deliberately applied before it bears external load, in order to offset the expected external pressure and increase bearing capacity. Its core claim, as a design attitude, is that resistance to pressure should be built in at the design stage rather than improvised when the load arrives, as when steel strands are tensioned in concrete to create precompression. The conditions are that the magnitude and anchoring of the prestress be controlled and that time-dependent prestress losses be accounted for.
SCAFFOLDING EFFECT
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- Map the load first: analyze the direction of the external loads the structure will face. - Preload in reverse: apply opposing internal stress at the corresponding locations. - Verify net stress: check service and ultimate states and allow for prestress loss.
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Introducing internal stress of opposite sign to the working load before loading, such as tensioning strands to precompress concrete, cancels or reduces the net stress in service and so raises crack resistance and bearing capacity.
MINIMUM ACTION
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Prestressed_structureverified
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