Damage quantification in steel and reinforced concrete beams
Abstract eng: Vibration Based Damage Detection (VBDD) techniques are very popular among researchers in the field of structural health monitoring as they are simple and effective in assessing structural damage. These techniques are applicable in the damage assessment of structures because the presence of damage alters the structure’s physical properties (stiffness, mass and damping) which then leads to the changes in its modal properties (natural frequencies and mode shapes). This paper firstly determines the percentage of stiffness reduction when steel beam first yields and also when the reinforced concrete beam first cracks, using experimental results. Thereafter, considering these values of stiffness reductions as the maximum amount of damage in the study, this paper demonstrates the use of a VBDD technique to detect, locate and quantify structural damage in both the steel and reinforced concrete beams. Finally, relationships between the percentage of stiffness loss to the changes in natural frequencies, modal flexibility and modal strain energy are established. These damage indices can then be used to quantify (realistic) damage. The next stage of the research is to further apply this method to concrete slab and finally to a slab-on-girder bridge.
Contributors:
Publisher:
Taylor and Francis Group, London, UK
Conference Title:
Conference Title:
Sixth International Conference on Structural Engineering, Mechanics and Computation
Conference Venue:
Cape Town, South Africa
Conference Dates:
2016-09-05 / 2016-09-07
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-09-20, last modified 2016-09-20
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