A time domain approach for reconstruction of moving loads acting on bridges from dynamic response data

QUICK‐B‐WIM: Large scale application of a moving force identification method on a railway bridge

“…Firus et al [12] originally proposed a novel method, denoted as Quick-B-WIM (QBWIM), for inverse determination of time-dependent moving forces on bridge structures using the structural responses. It is based on the modal superposition principle in combination with the Newmark method [11][12].…”

“…Firus et al [12] originally proposed a novel method, denoted as Quick-B-WIM (QBWIM), for inverse determination of time-dependent moving forces on bridge structures using the structural responses. It is based on the modal superposition principle in combination with the Newmark method [11][12]. According to Liu et al [9] similar approaches could be described as a transfer of the inverse problem into a forward solution process denoted as Load Iteration (Figure 2).…”

“…Such problems do not occur when applying the QBWIM method, since in this case the loads are optimized specifically on the basis of the Jacobian and Hessian matrix of the objective function [12]. This significantly reduces the number of iterations and allows an efficient optimization process with arbitrary initial loads.…”

“…This significantly reduces the number of iterations and allows an efficient optimization process with arbitrary initial loads. The objective function takes into account not only the error between the simulation and the measured variables, but also the local volatility of forces of a single axle and the deviation from its mean value [12].…”

“…In this paper, we present the results of a validation study of a novel B-WIM method denoted as Quick-B-WIM (QBWIM) originally proposed by Firus et al [12] under real operating conditions. The study involved the measurement of the weight of vehicles crossing a bridge using both the QBWIM method and a traditional WIM system.…”