NONDESTRUCTIVE TESTING METHODS AS STRESS SCREENING FACILITIES

摘要

For monitoring the impact of environmental stress on buildings, test specimen have to undergo an examination in a climatic chamber. Therefore, at the Wilhelm -Klauditz - Institute different climatic chambers are used with a test area up to 8.3 m length and 2.5 m height. Under these controlled, reproducible climatic conditions, different nondestructive measurement techniques can monitor the impact of stress to test specimen. Depending of the reaction of the object under investigation, electronic speckle pattern interferometry (ESPI) for 3-D microdeformation measurements, grey level correlation technique for 2-D in-plane deformation measurements and transient thermography for the interrogation of internal defects and structural faults has been used.