Temperature Variation on Concrete Structures- A Case Study

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).

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

The temperature on the basin walls

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).

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).

The temperature differences on the two sides of the wall

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

No potential conflict of interest was reported by the author.

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.