Evaluation of Dual Cable Signal Support Systems with Pivotal Hanger Assemblies, Summary

摘要

The primary objective of the project was to identify which dual cable support systems provide the best potential for hurricane resistance. Along with hurricane resistance, the serviceability limit for each system was considered. Systems were evaluated using full-scale tests with the UF Hurricane Simulator. Thirty-three wind load tests were performed to measure signal rotations, cable tensions, and cable displacements. The data was analyzed to determine the effect of signal orientation, wind angle, hanger type, and signal material on system performance during high wind conditions. The results were used to calculate for coefficients for dual cable systems. The force coefficients may be applied to wind loads on traffic signals when designing intersections. Results showed that there is a significant difference in rotations and cable tension among the different support systems. The systems that tend to have greater rotation under relatively low wind loads also reduce the increase in cable tension experienced under high wind loads.