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Durability Aspects and Performance of Timber Structures

This study focuses on the vulnerability of timber components to physical durability aspects such as fungi, bacteria, and insects. The impact of moisture content, temperature, and oxygen levels on the decay process is also investigated. The results provide insights for improving the natural durability and strength of timber structures.

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Durability Aspects and Performance of Timber Structures

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  1. 14-15 May 2007 1 COST E55 : Modelling the performence of timber structures Working Group 2: Vulnerability of components physical durability aspects

  2. Durability aspects • fungi • bacteria • insects 14-15 May 2007 2

  3. moisture content > 21% • Durability aspects • fungi • bacteria • insects temp. > 4 oC oxygen fungi Wood 14-15 May 2007 3

  4. 14-15 May 2007 4 “churchyard test”: loss of mass Time – loss of property (beech) 100 90 80 70 mass Natural durability 60 E - static 50 Loss of property [%] E - dynamic 40 30 20 10 0 0 6 12 18 26 34 Time [weeks]

  5. Durability aspects • fungi • bacteria • insects foudation piles 14-15 May 2007 5

  6. Durability aspects • fungi • bacteria • insects grub 14-15 May 2007 6

  7. fungi spruce 100 Pine sapwood Pine heartwood 80 Strength (fc) loss (%) Pine sapwood 60 Pine heartwood bacteria 40 spruce 20 100 0 Time [years] 0 20 40 60 80 Pine sapwood [fungi] Pine heartwood [fungi] Spruce [fungi] Pine Sapwood [bacteria] Pine heartwood [bacteria] Spruce [bacteria] 14-15 May 2007 7

  8. Moisture content as indication for decay decay 14-15 May 2007 8

  9. 14-15 May 2007 9 Thank you for your attention.

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