A parametric study of curved incrementally launched bridges

Granata, Michele Fabio; Margiotta, Piercarlo; Arici, Marcello

doi:10.1016/j.engstruct.2012.11.007

Cited by 30 publications

(9 citation statements)

References 12 publications

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“…Previous studies on the incremental launching method usually focused on isolated structural members such as slender plate girders [8], I-shaped steel girders [9,13], and others [10,11], conducting parametric analysis on the non-uniform distribution of support reaction of slide shoes and the ultimate loadbearing capacity [1,3,5,6,8,9,12,13]. However, few efforts have been made to apply incremental launching construction processes to largescale hybrid structures that use long cantilever spans and that raise potentially complex questions of stress concentration and stability.…”

Section: Introductionmentioning

confidence: 99%

“…Although researchers and engineers have investigated the incremental launching method for concrete and steel girders [1,2,[6][7][8][9][10][11][12], the stability and stress concentration issues raised by long-span hybrid archgirder bridges when the integrated incremental launching technology is used are more prominent than those exhibited by routine girders during the launching process because of their thin plates, slender structural components, and complicated structural systems. Previous studies on the incremental launching method usually focused on isolated structural members such as slender plate girders [8], I-shaped steel girders [9,13], and others [10,11], conducting parametric analysis on the non-uniform distribution of support reaction of slide shoes and the ultimate loadbearing capacity [1,3,5,6,8,9,12,13].…”

Section: Introductionmentioning

confidence: 99%

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Integrated investigation of an incremental launching method for the construction of long-span bridges

Zhi-jian

Sun

2015

Journal of Constructional Steel Research

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated investigation of an incremental launching method for the construction of long-span bridges

Zhi-jian

Sun

2015

Journal of Constructional Steel Research

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“…As for the structural mechanical behavior in the process of incremental launching construction, Rosignoli, based on the error analysis of bridge boundary support construction, increased the bearing reaction force obtained from the overall analysis by 1.3 times [8] , so as to consider the stress of steel girder; Fontan et al [9] proposed an optimization design method of guide girder for the incremental launching construction of bridge; Granata, Margiotta & Aricima [10] carried out relevant parameter analysis to study the influence of design parameters on the bridge structure in the construction process.…”

Section: Introductionmentioning

confidence: 99%

Research on the Overall and Local Mechanical Behaviors of Steel Box Girder Cable-Stayed Bridge via Incremental Launching Construction

Zhang

Jiang

Gan

2020

ICE

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<p>In this paper, a large-span cable-stayed bridge with double pylons and double cable planes is employed to study the overall and local mechanical behaviors. The steel box girder bridge is constructed by incremental launching with the maximum span of 50 m. Through the overall stress analysis, the most unfavorable stress position of the structure in the incremental launching construction is identified; the refined local stress analysis is carried out for the girder section at this position, and the local stress characteristics of the structure are studied. The mechanical performance and the applicability of incremental launching are determined by comparing four kinds of elastic cushion. This paper aims at improving the safety of incremental launching construction of steel box girder bridge, and can provide reference for similar projects.</p>

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“…Bonded and unbonded prestressing are nowadays prevalent in box concrete girders of segmental bridges built by cantilevering [25,26], or in incrementally launched bridges [27,28]. For girder bridges the influence of the bendingshear interaction on the final safety level of these structures can be significant, added to the modifications of the stress state given by time-dependent phenomena like creep and shrinkage [25,29].…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

Bending-Shear Interaction Domains for Externally Prestressed Concrete Girders

Recupero

Granata

2013

Advances in Civil Engineering

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In prestressed concrete structures, the evaluation of the safety level is generally carried out by separating the bending moment strength and the shear force capacity. Actually interaction between bending moment (M) and shear force (V) can have significant consequences on evaluations in service life, especially when the ultimate limit state (ULS) is considered. In this paper, the M-V interaction is addressed for prestressed concrete girders, in the cases of both bonded and unbonded prestressing tendons. It can be demonstrated, by drawing the interaction domains (M-V), that a significant reduction of the safety level has to be considered when shear force is evaluated together with bending moment on the ULS of the cross-section, especially for external prestressing in concrete T-shaped or box sections of bridge girders. Interaction domains allow designers to evaluate and optimize reinforcement ratios, geometric properties of the beam, and effects of shear on the ultimate state. An analytical model, based on the stress field theory, is developed and proposed in this paper. A numerical example is developed and interaction domains are given for an example of a box section with variation in reinforcement ratio and tendon slope. A validation of the presented model is given, by comparing experimental data in the literature with results found using the proposed analytical approach.

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A parametric study of curved incrementally launched bridges

Cited by 30 publications

References 12 publications

Integrated investigation of an incremental launching method for the construction of long-span bridges

Integrated investigation of an incremental launching method for the construction of long-span bridges

Research on the Overall and Local Mechanical Behaviors of Steel Box Girder Cable-Stayed Bridge via Incremental Launching Construction

Bending-Shear Interaction Domains for Externally Prestressed Concrete Girders

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