Research on Fatigue Reliability of Cables of Partially Cablestayed.pdf

Journal of Highway and Transportation Research and Development Vol.3,No. 1(2008)66 Research on Fatigue Reliability of Cables of Partially Cable-stayed Bridge under Vehicle Load * YANG Mei-liang (^rHH.)** ,LI Bo (^$0,ZHANG Jian-ren (^cUt) (School of Bridge Structural Engineering,Changsha University of Science and Technology, . Changsha Hunan 410076, China) d e v r e Abstract:The tolerated stress of static strength has not been provided in domestic code for design of highway cable-stayed bridges. In or- s e r s t der to quantify the fatigue reliability of stay cable on partially cable-stayed bridge under the influence of vehicle load, based on the accu- h g i r rate analysis for time history of stay cable, fatigue rehability of cables of partially cable-stayed bridge under the influence of vehicle load l l a ; was researched according to the principle of equivalent fatigue damage. By assuming that the fatigue life is in accordance with the Weibull y l n o - distribution,fatigue reliability formula and reliability target ( ) of stay cable were derived and the model vehicle load frequency value e s u l spectrum composed of daily transport vehicles was also obtained. Numerical example of th partially cable-stayed bridge was presented to a n o