Fatigue Performance Of Variable Message Sign Luminaire Support Structures Fatigue Related Wind Loads On Highway Support Structures
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Fatigue Performance of Variable Message Sign & Luminaire Support Structures: Fatigue related wind loads on highway support structures
This report describes research which focused on determining equivalent static pressures for fatigue loads on cantilevered highway sign support structures. A cantilevered variable message sign (VMS) instrumented with strain gages, pressure transducers, and a wind sentry, was continuously monitored for three months. Short-term testing was conducted on the structure in order to determine the dynamic characteristics such as stiffness, natural frequency, and percent of critical damping. Long-term monitoring was performed to capture the structure's response to natural wind gusts, galloping, and truck-induced wind gusts.