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TEMPERATURE Measurement of the temperature inside the structural elements for
monitoring the global behaviour HUMIDITY Measurement of the humidity level inside the concrete (oxidation
risk) ACCELERATION Use of accelerometers integrated in the structure to monitor the
dynamic response. OXIDATION Control of the oxidation state of the steel bars in reinforced
concrete structural elements STRAIN
/ STRESS Stress control of the structure of the building, with miniaturized
devices inserted inside beams and columns. YOUR
HOME IN YOUR HANDS
The monitoring mainly concerns the elements relating to the main
structural nodes, through which detailed information on the working stresses
of the reinforcing bars and concrete is provided. The system developed is of the "embedded" type, inserted in
the structural element to be monitored (beam, pillar) just before the casting
of the concrete, and ends with an external cable for connection (near the
monitored node) with a box, powered at low voltage, which provides WiFi with the information measured to send it and a
remote or local Cloud / archive (for example in a technical room of the
building). An intelligent system allows to evaluate in real time the
"logic" of voltage detection, and to produce in real time an
analysis of the detection, and, if necessary, to send an alarm for exceeding
a threshold assumed to be dangerous or at risk. The archive system (locally or on the Cloud) also allows you to carry
out analyzes over time of the tensions, vibrations and the percentage of
humidity in the concrete, being able to process, for example, the variations
over time of the tensions and the level of humidity.
A structural safety monitoring system, other than detecting the
presence of structural damage, and thus
assessing the serviceability of the building after ordinary or exceptional
events, it can provide objective data on the vulnerability, or even
just on its current conditions, by evaluating the stress state,
the dynamic response, and the integrity of structural
materials. THE
SYSTEM The monitoring system is realized during building erection by
installing a number of sensing devices (sensors), which are suitable to
measure the physical quantities of interest, in order to estimate the current
state of materials and, consequently, the actual strength of structural
members, with the aim of assessing the overall safety of the building. The operating monitoring system is integrated in the structure since
the beginning of its life cycle, with sensors installed in the most important
locations, and data-collection devices able to transfer remotely the values
measured inside structural elements. Each data-collection device, appearing as a small box placed on a beam
or a pillar, is connected to a subset of sensors, those placed at the closest
reference locations, and it is connected by a local network to the main
data-processing unit. The system can be considered as an Internet of Things (IoT) applied to building structures ADVANTAGES -Great control on whole structure, by using tailored, specific and
smart software; -optimization of the maintenance
activity -Increasing the safety level - Alarm signal or alert at the critical state, as well as standard condition -Negligeable installation and maintenance
cost for the monitoring system,
encouraging large diffusion of the system An approximate evaluation of the cost for this kind of monitoring
system range between 1-2 % of the total cost of the building, but involves
more important economic gain, considering the non-stop activity and the more
effective maintenance.
- The large quantity of collected data every day, month, year, in long
term will be an extraordinaire archive source of information in order to
follow the continuous behavior of the structure, including specific event,
earthquake, vibrations,overload… - Following the behaviour of the structure it
possible to analize, offline, the life evolution
and changes of the structure, in order to analyze and understand in detail
the cyclic events, and provide earlier countermeasure in degenerative
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