Minimum Reinforcement Reduction for Slow-Curing Concrete

Technical Article on the Topic Structural Analysis Using Dlubal Software

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Technical Article

In the case of using the slow‑curing concrete (usually for thick components), you can reduce the calculated minimum reinforcement by a factor of 0.85 to apply the load due to restraint, according to EN 1992‑1‑1, Section 7.3.2. However, a precondition for reduction is that the characteristic value of the strength development r = fcm2 / fcm28 does not exceed 0.3. Other key requirements for the application of this reinforcement reduction are explicitly specified in final planning documents.

However, the reduction of the minimum reinforcement is regulated only in the national application documents for Germany and Austria. For other countries using Eurocode 2 for reinforced concrete design, this reinforcement reduction is not provided. Therefore, it is possible to apply the minimum reinforcement reduction in RF‑CONCRETE or CONCRETE only if you select one of the National Annexes for DIN EN 1992‑1‑1/NA: 2013‑04 (Germany) and ÖNORM B 1992‑1‑1:2011‑12 (Austria).

Author

Dipl.-Ing. (FH) Alexander Meierhofer

Dipl.-Ing. (FH) Alexander Meierhofer

Head of Product Engineering Concrete & Customer Support

Mr. Meierhofer is the development leader of the programs for concrete structures and is available for the customer support team in the case of the questions related to reinforced and prestressed concrete design.

Keywords

Minimum reinforcement Cement Reduction

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  • Updated 05/10/2021

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Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

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Linear and nonlinear analysis of reinforced concrete members with reinforcement concept

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