| 摘要 |
A method of producing a compressive stress in a mass comprised of plastic material having a tendon therein, at least a portion of the length of the tendon being contained in thermoplastic material within the mass, the method comprising the steps of heating the tendon to a temperature sufficient to soften the thermoplastic material in an annular region surrounding the tendon, applying a tractive force to the heated tendon, thereby placing the heated tendon under tensile stress, and securing the heated tendon to the mass in a manner that causes the tensile force in the tendon to produce a compressive stress in the mass and prestressed plastic bodies produced according to this method.
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