Investigation of Design Loads and Load Combinations for Limit State Design of Long Span Cable-Supported Bridge

For the design of long span cable supported bridge (LSCSB), the reliability based limit state design manual is under development. Statistical and probabilistic definition of the design loads and the load factors in the load combination are examined in relation to the design period and the safety level. For the purpose of investigating the reliability level of the design load combinations in the ultimate limit state and the extreme event limit state, the definitions of the variable loads are reviewed in terms of the design period and exceedance probability. An example of cable-stayed bridge is presented to show the reliability indexes of design load combinations of earthquake load.