PSI - Issue 5

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Patrícia C. Raposo et al. / Procedia Structural Integrity 5 (2017) 1147–1152 Raposo et al. / Structural Integrity Procedia 00 (2017) 000 – 000

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exposed to rain, had a higher humidity content. The humidimeter readings were compared with the resistograph results for the correspondent elements. In Table 1 are presented the results obtained in this test, and it’s possible to observe that the H3 spot has a higher humidity content (14%), and the lower value occurs in the H1 spot.

Table 1. Humidimeter obtained results (table adapted from: [9]).

Humidity content (%)

Designation Mean Section, Ø (cm) Actual state

Left support

Right support

Visual observation

H1 H2 H3 H4

35 32 30 30

Reasonable Degraded Degraded Reasonable

Good

Degraded Degraded

12 13 14 13

Cracks and Nodes Node at ½ span

Degraded Degraded Reasonable

Good Good

Crack Node

Viga VC06_Ø17

Viga VC01_Ø17

VMac_7x10cm2//0.60

Topo Pavimento + 1.88

VMac_7x10cm2//0.60

Viga VC02_Ø17

VMa_8x10cm2

Viga VP01_Ø30 ENSAIO H01

VMa_8x10cm2

VARA (6x6cm2)

VMa_8x10cm2

VARA (6x6cm2)

VMa_8x10cm2

VMac_7x10cm2//0.60

VARA (6x6cm2)

VMa_8x10cm2

VARA (6x6cm2)

VMa_8x10cm2

Viga VP02_Ø30 ENSAIO H02

VMa_8x10cm2

VARA (6x6cm2)

Topo Cobertura + 5.54

VMa_8x10cm2

Viga VP04_Ø30 ENSAIO H04

VMa_8x10cm2

Viga VC07_Ø17

VMa_8x10cm2 Vigas VP_Ø30//1.70 Vigas VP_Ø30//1.80 VMa_8x10cm2

VMac_7x10cm2//0.60

VMa_8x10cm2

Viga VC03_Ø17

VMa_8x10cm2

ENSAIO PM01

VMa_8x10cm2

Viga VP03_Ø30 ENSAIO H03

VMa_8x10cm2

PERNA VP05_Ø30

VMa_8x10cm2

VMac_7x10cm2//0.60

Lajes de Pedra

VMa_8x10cm2

existente a manter

VMa_8x10cm2

Viga VC04_Ø17

VMa_8x10cm2

VMac_7x10cm2//0.60

VMa_8x10cm2

Viga VP05_Ø30 ENSAIO H05

Vigas VP_Ø30//2.25 Vigas VP_Ø30//2.55 Vigas VP_Ø30//2.25 VMa_8x10cm2 VMa_8x10cm2 VMa_8x10cm2 VMa_8x10cm2 VMa_8x10cm2

VMa_8x10cm2

Viga VC05_Ø17

VMa_8x10cm2

Viga VP06_Ø30 ENSAIO H06

PERNA VP05_Ø30

Viga VP07_Ø30 ENSAIO H07

VMa_8x10cm2

VARA (6x6cm2)

Viga VP08_Ø30 ENSAIO H08

VMa_8x10cm2

VARA (6x6cm2)

VMa_8x10cm2

Viga VP09_Ø30 ENSAIO H09

VMac_7x10cm2//0.60

VARA (6x6cm2)

VMa_8x10cm2

VARA (6x6cm2)

VMa_8x10cm2

VARA (6x6cm2)

VMa_8x10cm2

VMac_7x10cm2//0.60

VMa_8x10cm2

Topo Cobertura + 6.83

Viga VC08_Ø17

VMa_8x10cm2

ENSAIO PM02

VMa_8x10cm2

Vigas VP_Ø30|Ø32//3.75

VMa_8x10cm2

VARA (6x6cm2)

Viga VC08_Ø17

VARA (6x6cm2)

VMa_8x10cm2

Viga VC09_Ø17

VARA (6x6cm2)

VMa_8x10cm2

Viga VP12_Ø35 VMa_8x10cm2 H1 ENSAIO H12

VMa_8x10cm2

ENSAIO H10

Viga VP10_Ø30

VMac_7x10cm2//0.60

VMa_8x10cm2

ENSAIO H11

Viga VC10_Ø17

Viga VP11_Ø32

VMa_8x10cm2

(b)

VARA (6x6cm2)

(a)

VARA (6x6cm2)

Fig. 8. Structural plant of the ground floor with the identification of the inspection sites (images from: [9]).

PLANTA ESTRUTURAL DO PISO 0

PLANTA ESTRUTURAL DA COBERTURA

3. Conclusions Non-destructive tests allow the perception of the state of conservation of the structure without destroying it. Some instruments, such as the hammer and chisel, resistograph and humidimeter, used in wood structures have been revealed to be important tools in structural evaluation, allowing the acquisition of qualitative information. This work started with a visual inspection of the structure to assess the conservation status and the potential degraded zones, then was made an inspection with the aid of the resistograph and humidimeter to confirm the dimension of the degradation, allowing to develop knowledge to support a future decision in a rehabilitation project. The floor is under infiltrations so a non-destructive test campaign was carried out. Resistograph and humidifier permitted to evaluate, in a non intrusive way, the state of preservation of the wooden floor. The resistograph results allow to identify variations of density along the sections of the structural elements, growth rings, biological degradation zones, cracks and voids in the parts, normally, not visible by visual inspection. The results of resistograph combined with the results of the humidimeter and visual inspection can lead to the reasons why the sections are degraded. Acknowledgements The authors express their gratitude to engineer Michael Andrade who made available the work which this article is based on, to engineer Tiago Ilharco for the help and knowledge provided to developed this work, to NCREP for supplying information about inspection and rehabilitation of wood structures, to Professor Luís Sousa for the knowledge transmitted and for the availability in the non-destructive tests in woods.

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