Members newsletter CSI NL Insert

//Members newsletter CSI NL Insert

Members newsletter CSI NL Insert

Structural Health Monitoring can be very helpful to Building Surveyors…

Structures deform as they experience load, resulting in stress developing within the body of the structure. These deformations, and consequent stresses can be monitored to ensure that they do not exceed specified limits adopted during design, i.e. serviceability limit state and ultimate limit state. Concrete Structure Investigations (CSI) offers different Structural Health Monitoring methods to suit the client needs, such as:

Crack monitoring

  • Especially for Reinforced Concrete (RC) structures
  • Measuring manually using a crack ruler, or digitally using displacement gauge

Stress Measurement

  • By strain gauge
  • Stress can then be calculated using known properties of the monitored member or

in conjunction with the result from material test.

Vibration Monitoring

  • Vibration due to service load such as wind, traffic, normal occupancy of the structure, as well as probabilistic load, such as earthquake can be monitored by an accelerometer.
  • Force and deformation can then be estimated from the vibration data.

CSI offers flexible timeframes for Structural Health Monitoring; it can be done as a one-off during

test day, continuously for a specific duration (days, weeks, months), or periodically/seasonally to gauge the different environmental effect during summer/winter, to the expansion and contraction of steel railway structure.

Clients and engineers are most likely concerned if there are cracks in RC floor, beam, column, or wall, especially if the structure is relatively new and has only experienced the service load it is designed for. They will want to ensure  these cracks do not widen beyond the limit imposed during design. Other times, an engineer might be interested in the existing stress within old pre-stress elements, such as within a hollow core or flat slab units, to ensure they are sufficient in capacity to support additional loading.  Vibration monitoring is useful for researchers as well as for practicing engineers.

Please look us up on 0800 33 77 67 or kurtis@csiscan.nz for assistance

2018-05-28T12:03:28+00:00