Prestressed concrete From Wikipedia, the free encyclopedia Prestressed concrete is a method for overcoming concrete's natural weakness in tension. It can be used to produce beams, floors or bridges with a longer span than is practical with ordinary reinforced concrete.

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Prestressed concrete is particularly advantageous for beams. It permits steel to be used at stresses several times larger than those permitted for reinforcing bars. It permits high-strength concrete to be used economically, for in designing a member with reinforced concrete, all concrete below the neutral axis is considered to be in tension and ...

Define prestressed concrete. prestressed concrete synonyms, prestressed concrete pronunciation, prestressed concrete translation, English dictionary definition of prestressed concrete. n concrete that contains steel wires, cables, etc, that are prestressed within their elastic limit to counteract the stresses that will occur under load...

Prestressed concrete is used in the structures where tension develops or the structure is subjected to vibrations, impact and shock like girders, bridges, railway sleepers, electric poles, gravity dams, etc. Precast members like electric poles and railway sleepers are produced in factories using simple pre-stressing methods.

外部链接. National Precast Concrete Association - An international trade association, NPCA represents manufacturers of plant produced precast and prestressed concrete products; Precast/Prestressed Concrete Institute – Resources and information on Precast and Prestressed Concrete; Canadian Precast/Prestressed Concrete Institute – Resources and information on …

for post-tensioned beams Where ‘t’ is the age of concrete. 3. Loss due to Creep of Concrete Creep is the time dependent deformation due to permanent force. In prestressed concrete, prestress is the permanent force in the member, causing compressive stress at the level of steel.

Andrei Walther: Fast NDT Localisation of Prestressing Steel Fractures in P-T Concrete Bridges. Structural Faults and Repairs, Edinburgh 2008 Structural Faults and Repairs, Edinburgh 2008 Andrei Walther: Ortung von Brüchen der Spannbewehrung in Spannbetonbauteilen - schnell, innovativ und in hoher Qualität - .

The Freyssinet Prestressed Concrete Company Limited was established in 1954 to promote ‘State of the art’ prestressing technology and related products in India. It has successfully made pioneering efforts to apply this technique in all types of structures and undertake the works on turnkey basis. It has developed the range from

08/10/2001 · Traditional compressive stress limits (0.45f'c and 0.60f'c) protect concrete from excessive creep deformations and fatigue (0.40f_c^' limit). Although the above stress limits are only specified for fully prestressed components and not for reinforced concrete components of composite members, the practice varies across the United States.