Finite Element Model Updating of Reinforced Concrete Beams with Honeycomb Damage

Archives of Civil Engineering

Ismail Z.¹ 

[1] Civil Engineering Department, University of Malaya Lembah Pantai, 50603 Kuala Lumpur, Malaysia;

关键词: damage parameter;    FE model;    honeycombing;    updating;    Young’s modulus;   

DOI  :  10.2478/v.10169-012-0008-x

来源: DOAJ

【 摘 要 】

Honeycombing is one of the common damage that can occur in concrete structures. Literature and studies on this phenomenon are, however, limited. The objective of this study was to propose a method of detecting honeycombing damage in a reinforced concrete beam using the finite element model updating technique. A control beam and two finite element models representing different severity of honeycombing damage were constructed using available software and the defect parameters were updated. Analyses were performed on the finite element models to approximate the modal parameters. A datum and a control finite element model to match the datum test beams with honeycombs were also prepared. Results from the finite element model were corrected by updating the Young’s modulus and the damage parameters. There was a loss of stiffness of 3% for one case, and a loss of 7% for another. The more severe the damage, as evidenced by the higher volume of honeycombs, the higher the loss of stiffness. The test results also confirmed that there was no significant loss of stiffness by doubling the volume of the honeycombs. The finite element analyses indicated the general region of the honeycombs and showed abnormalities with the mode shapes at the ends of the beams.

【 授权许可】

Unknown