Sequential Stressing of Cable-Stayed Bridges Erected on Falsework

Cassity, Patrick; He, Yonghui

doi:10.2749/222137801796350572

Cited by 3 publications

(1 citation statement)

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“…The construction of cable-stayed bridges is characterized by a series of phases in which geometry, boundaries, and loads vary significantly, causing changes in the state of stress [1][2][3][4][5][6][7][8][9]. The optimization of the construction process via the regulation of the initial forces in cables is important for the optimal control of the whole structural behavior [10][11][12][13][14][15][16]. One of the most common problems dealing with cable-stayed bridges concerns the computing of the initial cable forces and the pre-tensioning sequence, needed to obtain the designed configuration [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

On the Optimal Design of Cable-Stayed Bridges

Carpentieri¹,

Modano²,

Fabbrocino³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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This paper studies cable-stayed bridges (CBSs), with special focus on the initial force distributions in cables during construction phases. An algorithm for the optimal design of the pre-tensioning sequence of cables is presented. A procedure for the optimization of cable forces is developed, according to a given objective function. Particular attention is given to the choice of the parameters to be optimized, and numeric examples are provided. The proposed method is employed to study the At Tannumah bridge in Basrah, Iraq; and is suitable for the optimization of the pre-tensioning sequence of arbitrary cable-stayed bridges. We show in the rest of the paper that an initial design (named S 0 configuration) that does not include any pre-tensioning forces in cables can lead to a highly non uniform bending moment distribution over the deck; which is not ideal for an optimal structure. Fort that reason we develop an "optimal design" (named S d configuration), that corresponds to pre-tensioning forces inducing an "optimal" bending moment distribution over the deck.

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