Does anyone know of an acoustic monitoring system (or any other type of continuous automated monitoring system) that has been used to detect breakage of wires in 7-wire post tensioning tendons (due usually to corrosion) in structures, other than the "Soundprint" system?
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Acoustic Monitoring of post tensioing tendons for wore breakage
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Pure Technologies have the patent on acoustic monitoring (Soundprint) and recently purchased another company for PCCP (pressure pipe) non-acoustical monitoring.
What type of structure are you referring - building, bridge stay cables, tank ?
What type of structure are you referring - building, bridge stay cables, tank ?
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Hi Ingenuity;
Yes I have used Pure Technology's Soundprint and have had their system in place on one building now for 15 years. But for a current parking structure where we have recommended that this system be installed, the client is insisting on more than one quote even though we have told him a year ago that to the best of our knowledge there is no other company with the same or equivalent technology that can automatically and continuously monitor every tendon in every beam in every storey of the garage. The building is a 4-storey garage with unbonded post-tensioned concrete beams and post tensioned concrete girders in both directions. The client has asked us to to once more look into this. Although there are automated concrete strain monitorin systems, such as OSMOS, this does not monitor the tendons directly, but only indirectly by monitoring the concrete strain and we are doubtful that is good enough or that it would be cost effective to install it on every post-tensioned beam and girder in this structure. We are fully conversant with the Pure Technologies' Soundprint system, but any further information on any other systems that might be around and do similar monitoring would be helpful.
Yes I have used Pure Technology's Soundprint and have had their system in place on one building now for 15 years. But for a current parking structure where we have recommended that this system be installed, the client is insisting on more than one quote even though we have told him a year ago that to the best of our knowledge there is no other company with the same or equivalent technology that can automatically and continuously monitor every tendon in every beam in every storey of the garage. The building is a 4-storey garage with unbonded post-tensioned concrete beams and post tensioned concrete girders in both directions. The client has asked us to to once more look into this. Although there are automated concrete strain monitorin systems, such as OSMOS, this does not monitor the tendons directly, but only indirectly by monitoring the concrete strain and we are doubtful that is good enough or that it would be cost effective to install it on every post-tensioned beam and girder in this structure. We are fully conversant with the Pure Technologies' Soundprint system, but any further information on any other systems that might be around and do similar monitoring would be helpful.
GregLocock
Automotive
The field is more generally known as acoustic emissions, AE for short, and was publicised by Bruel and Kjaer 30 years ago. I doubt they were much into condition monitoring of buildings, but that is another possible lead.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376
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