Fault-tolerant interval inversion for accelerated bridge construction based on geometric nonlinear redundancy of cable system

Abstract

In Accelerated Bridge Construction (ABC), assembly fault-tolerant capacity against inevitable deviations, as a critical aspect of construction resilience, holds the key to reducing onsite time and indirect delay losses. However, as a measurement of such capacity, the “fault-tolerant interval” of structural assembly interface parameters, are not accounted for. This paper proposes a Fault-Tolerant Interval Inversion (F-TII) framework to mine the fault-tolerant capacity from geometric nonlinear redundancy of cable system, in which the inversion is solved as a reliability-constrained, multiobjective interval optimization problem with the aid of an accelerated surrogate generation technique. The effectiveness and efficiency of the proposed method is validated in a real Self-Anchored Suspension (SAS) bridge through discussing the optimization results and comparing with the general strategies, respectively. The constructability of the assembly process can be greatly promoted on the guidance of the maximized fault-tolerant interval of the hanger tensioning parameters. This method can be extended to the F-TII of other scenarios of ABCs.