Vibration Data Collection
Collection of vibration data utilizing Geocomp’s S-lynks wireless measurement nodes
The Fred Hartman Bridge (1995) is a twin-deck cable-stayed bridge with a main span unit of 2,475 ft. carrying 2.6 miles between Baytown and La Porte, TX. Each of the decks is 79 ft. wide and consists of precast concrete slabs on steel girders and floor beams. The decks are supported by a total of 192 cables, arranged in four inclined planes originated at each of the two double diamond shaped towers. The towers are 436 ft. tall. The stays range from 194 to 649 ft. in length, with varying diameters.
Geocomp deployed S-lynks wireless vibration measurement and data analysis solution. S-lynks allowed us to collect vibration data from Southbound deck, Southbound North Tower, and all of the 192 stay cables under operational and ambient loads with minimal impact to traffic. Following the fieldwork, Geocomp conducted data analysis utilizing its Operational Modal Analysis (Snap-D) and Cable Tension Estimation (CTE) software developed in-house and provided the final report. The reported information included: