OPTIMUM DESIGN OF CABLE-STAYED BRIDGES CONSIDERING CABLE FAILURE
Price
Free (open access)
Transaction
Volume
209
Pages
10
Page Range
47 - 56
Published
2022
Paper DOI
10.2495/HPSU220051
Copyright
Author(s)
NOEL SOTO, CLARA CID, AITOR BALDOMIR, SANTIAGO HERNÁNDEZ
Abstract
A methodology to obtain the minimum weight of cables in cable-stayed bridges when a cable fails has been developed. To this end, a multi-model strategy is proposed that takes into account design constraints in both the intact and damaged models. The dynamic effect of the cable breakage is considered by the application of impact loads at the tower and deck anchorages. The methodology is applied to the Queensferry Crossing Bridge, a multi-span cable-stayed bridge with cross stay cables in the central section of each main span. The number of cables, anchorage position on the deck, cable areas and prestressing forces are considered as design variables into the optimization process simultaneously. The fail-safe optimum design results in a different cable layout than the optimized design of the intact structure, with minimum volume increase.
Keywords
cable-stayed bridge, optimum design, fail-safe, cable rupture, cable breakage, cable system, cable arrangement, cable layout