Abstract
This paper deals with an effective and fast approach to the optimization of the pretension forces in arched bridges with suspended deck, which makes use of the influence matrix method. The given cable-tensioning procedure leads to a linear system of equations with a reduced number of unknowns and can be effectively implemented within active control procedures that handle time-varying loading conditions. It achieves of a target bending moment distribution over the structure, which significantly mitigates the state of stress of the deck. Numerical results dealing with a Nielsen arch bridge illustrate the versatility of the proposed approach when dealing with different loading conditions
Highlights
There are several adaptive applications of cable-stayed structures in the field of bridge construction (Simões and Negrão, 1995; Freire et al, 2006; Fabbrocino et al, 2017; Song et al, 2018; Reksowardojo et al, 2019)
We present the numerical implementation of the analytical method given in Section “Computation of Cable Pretension Forces” with reference to a case study of a Nielsen arch bridge featuring a span of 140.8 m and an aerodynamic shape
The following sections illustrate a collection of numerical results, which examine the effects of different loading conditions on the bridge model described in the previous section
Summary
There are several adaptive applications of cable-stayed structures in the field of bridge construction (Simões and Negrão, 1995; Freire et al, 2006; Fabbrocino et al, 2017; Song et al, 2018; Reksowardojo et al, 2019). The present work applies the Influence Matrix Method (IMM) presented in Fabbrocino et al (2017) and Mascolo and Modano (2020) for an effective design of the pretension forces in cable-stayed arch bridges.
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