​Putting The Power Of Monitoring And Safety In Your Hands​

Photo by Joseph Rivera Rebolledo

TYPEFUNCTIONSAPPLICATIONS

 Strain Gages Sensors

 

Measurement of strains, deformations

and stresses

Strains and stresses steel girders,cables, gusset plates, reinforced concrete, piles, pre- & postension elements

 Temperature Sensors



Measurement of absolute  temperature

on structure's surface  and relative temperature for  compensation of strain  measurements

Concrete cure,  structural elements and weather station

Displacement Sensors



Measurement of displacement  between two gage points
Construction joints, crack/fissure  growth and  structural members

Accelerometers


Measurment of accelerations from  DC to low frequencies and modal analisis
Piers, abutments, decks, towers and cables

Inclinometers


Measurement of angular variation, differential sttlements  and slope displacements
Piers, abutments, footings, wing walls,towers, approach embankments and excavations

Piezometers


Measurement of drainage, leakage,  water level, water pressure and pore  pressure
Pipes, excavations, embankments, rivers and banks

Pressure & Load Cells



Measurement of loads and  pressures
Foundation, embankment and  structural elements

AE Acoustic Emision



Detects crack growth, friction and corrosionSteel elements and welds


HISTORIC BRIDGES FAILURES

Collapse of  I-35W Saint Anthony Falls Bridge (Bridge 9340) over Missisippi RiverAugust 1, 2007

Collapse of The Silver Bridge  over Ohio River, December 15, 1967 

Collapse of Mianus River Bridge in Connecticut, June 28, 1983

Collapse of New York’s I-90 over the Schoharie Creek Bridge in April 5, 1987

Concrete Cure Monitoring

Monitoring Tilts & Vibrations in Piers and Abutments 

Monitoring Super Bridges Cables

For more information and details about sensors see PRODUCTS section.

HIGHWAY STRUCTURES

Know bridge behavior and effects under construction loads, service and extream loads. Reduce operational and maintenance cost and meet the National Bridge Inspection Program.


​Following the historic collapse of the Silver Bridge (suspension bridge) on December 15, 1967, which sent 46 people to their deaths, the safety of bridges wine making another pricipales concerns of the nation.​ Congressional hearings on the failure took place and through testimony it was found that neither states, authorities, counties or municipalities who were owners of bridges had programs in place for structural inspections. After these succes, in 1968 Congress passed the Federal Highway Act: US Code Title 23 Section 151 that set forth the requirement to establish National Bridge Inspection Standards (NBIS). Despite this initiative over time related fatal crashes continued to structural deficiencies which caused changes to the NBIS and development of guidelines. 


Common causes of deterioration and failure of bridges are:


























The use of smart structural health smonitoring systems in the highway bridges will help you to meet the NBIS requirements, to have best & better understanding of the structure behavior, early detection and location of failures verification of integrity and structural strength, reduction in costs and inspection periods, improved maintenance programs, increase security and reliability.


Below some of the sensors used to monitor the bridges' behavior and performance:

​Putting The Power Of Monitoring And Safety In Your Hands​