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Development Of A Fiber Optic Polarimetric Sensor For Concrete, Insang Lee
Development Of A Fiber Optic Polarimetric Sensor For Concrete, Insang Lee
Theses
Development of a fiber optic sensor for embedment in cementitious composites and measurement of displacements associated with the opening of microcracks is described. The sensor can be employed as a transducer for measurement of crack tip opening displacements during fracture tests. A polarization maintaining fiber is used as the sensing element, and transduction mechanism is similar to those of other polarimetric type based sensors. However, the deformation resolving power of the sensor is increased by way of increasing the effective length of the optical fiber. This is done by winding the optical fiber into a coil. A direct relationship between …
Nondestructive Dynamic Load Testing Of Bridges Using Strain Sensors, Suzanne Boland
Nondestructive Dynamic Load Testing Of Bridges Using Strain Sensors, Suzanne Boland
Theses
This thesis investigates the use of nondestructive bridge load testing utilizing strain sensing equipment. Nondestructive bridge load testing has not been used extensively due to lack of expertise and perceived high cost. It can, however, play a key role when an existing bridge needs to be evaluated. Since most evaluation techniques tend to be conservative, the results from such an evaluation may not represent the real properties of the structural members. The true properties of an existing bridge can be identified using the results from nondestructive static and dynamic load testing. The procedures used to identify a structure with the …