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ISO 20987:2019

Simplified design for mechanical connections between precast concrete structural elements in buildings

SKU: iso_069686_167186 Published by ISO Publication Year 2019 1 Edition 76 pages

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This document refers to connections in precast frame systems, either for single-storey or multi-storey buildings. The connections for all orders of joints are considered. Large wall panel and three-dimensional cell systems are not considered. According to the position in the overall construction and of the consequent different structural functions, the seven following orders of joints are considered: a) mutual joints between floor or roof elements (floor-to-floor) that, in the seismic behaviour of the structural system, concern the diaphragm action of the floor; b) joints between floor or roof elements and supporting beams (floor-to-beam) that give the peripheral constraints to the floor diaphragm in its seismic behaviour; c) joints between beam and column (beam-to-column) that ensure in any direction the required degree of restraint in the frame system; d) joints between column segments (column-to-column) used for multi-storey buildings usually for dual wall braced systems; e) joints between column and foundation (column-to-foundation), able to ensure in any plane a fixed full support of the column; f) fastenings of cladding panels to the structure (panel-to-structure) that ensure the stability of the panels under the high forces or the large drifts expected under seismic action; g) joints between adjacent cladding panels (panel-to-panel) possibly used to increase the stiffness of the peripheral wall system and provide an additional source of energy dissipation. Simple bearings working by gravity load friction are not considered. Sliding and elastic deformable supporting devices neither, being all these types of connections not suitable for the transmission of seismic actions. The document provides formulae for the strength design of a large number of joint typologies.

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English

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PDF

GST REG No R119441681
QST REG No R1006017360

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ISO 20987:2019

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