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Open Access Case Report

Temperature Variation on Concrete Structures- A Case Study

Corneliu BOB*

Polytechnic University of Timisoara, Romania

Corresponding Author

Received Date: January 04, 2021;  Published Date: January 25, 2021

Introduction

During steaming of wood log a complex stress and strain state appear in the RC basins. The effect of this state on the behavior of the basins is presented (Figure 1) [1]. The basin structure elements were designed by taking into account the classical analysis which is characterized by next actions: permanent loads, the temperature action due to the difference between interior of basins (80-90°C) and the outdoors temperature (20°C), the earth pressure and wood log pressure. The different temperature action between the RC basin walls and the RC foundation was not taken into account (Figure 1).

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The Deformations due to Temperature Variation

It was calculated function of temperature on basin walls by using of well know procedure [2].

The temperature on the basin walls
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Stress state from differential strain

The stress state due to different temperature of interior and outdoor of the wall is illustrated in Figure 3 (Figure 3).

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Critical axial force of the wall

The critical axial force of a wall, according to Timoshenko- Gere, is calculated and compared with the effort from differential deformation between the wall and the foundation [3] (Figure 5).

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The check of detailing and wall reinforcement

The temperature differences on the two sides of the wall
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Conclusion

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Acknowledgement

The investigations presented here are part of the research project of the “Building Construction Research Institute- Timisoara Branch” (INCERC).

Disclosure Statement

No potential conflict of interest was reported by the author.

References

  1. Bob C (2003) The deterioration causes of the basin structure elements from a wood log steaming complex (in Romanian), Timisoara, Ed. Mirton.
  2. Romanian Norms C 107-2005 and EN ISO 13789: Thermal performance of buildings-Transmission heat loss coefficient –calculation method.
  3. Timoshenko SP, Gere JM (1962) Theory of Elastic Stability. Second Edition Amazon.com.
  4. SR EN 1992-1-1:2004/AC: Eurocode 2 – Design of Concrete Structures–Part 1-1: General rules and rules for buildings.
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