T/CI 059-2023 Active

Scope: This document specifies the technical requirements for the application of precast prestressed beams and slabs by the prestressing method in assembled monolithic frame and frame-shear structures, including the terminology and symbols of standard technologies, materials, component design, construction specifications, production and transportation, construction and installation, and quality acceptance, etc. This document is applicable to buildings with an earthquake resistance intensity of not more than 8 degrees and an environmental category of Class I, where assembled monolithic frame and frame-shear structures are used in the design, production, and acceptance of beams and slabs with a span of more than 3 meters in areas with a seismic intensity of not more than 8 degrees. Main technical contents: 5.1 General provisions 5.1.1 The precast prestressed beams and slabs shall be calculated according to the provisions of the current national standards for the limit state of bearing capacity and the verification of the normal use limit state, and necessary construction verifications shall be carried out according to the design requirements and construction schemes. 5.1.2 For the verification of the construction phase and the normal use limit state of the precast prestressed beams and slabs, the prestressing force shall be taken as the load to calculate its effect. For the calculation of the limit state of bearing capacity (except for fatigue verification), the ultimate strength of the prestressing tendons shall be taken as part of the resistance of the component. 5.1.3 For the horizontal laminated bending components formed in two stages, when the height of the precast components is less than 40% of the full cross-sectional height, reliable support shall be provided during the construction phase. For the laminated bending components with reliable support during the construction phase, they shall be designed and calculated as integral bending components, but their she