Modelización de tableros de obras de paso de luces cortas ejecutados con placa alveolar pretensada

Padilla, Valentín Moreno; Molera, Luis Albajar

doi:10.3989/ic.13.095

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…Xiang et al [28] established a calculation model with a spring-hinged link system and found that the maximum errors of joint shear force, hinge joint transverse force, and hollow slab relative displacement were 0.475 kN/m, 3.832 kN/m and 0.00067 mm, respectively, which verified the accuracy and practicality of the method. Moreno-Padilla et al [29] proposed a new model that showed a good correlation between the numerical predictions and the behavior observed in reality. Dan et al [30] established a multibeam model connected by distributed springs to analyze the modal characteristics of a fabricated girder bridge.…”

Section: Introductionmentioning

confidence: 93%

Study on Mechanical Behavior of Hollow-Core Slab Bridge with Pinned Reinforcement

Chen

Zhu

2023

Materials

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Joints connect prefabricated hollow-core slabs, the key elements of force transmission of hollow-core slab bridges. The joints are easily damaged, which affects the integrity and safety of the hollow-core slab bridge. This paper uses MIDAS FEA NX finite element analysis software to simulate the deep hinge joint segment model, comparing and analyzing the finite element simulation analysis results with the test results, and proposes the critical parameters of the hinge joint interface and concrete damage plasticity. Further, an assembled hollow slab bridge model is established to compare and analyze the force transfer performance of conventional and pinned reinforcement bridges and reveal the deep joint damage evolution process. The results showed that the hollow slab bridge damage appeared first at the hinge joint interface at the load location. Cracks in the joints can develop along the longitudinal and height directions, with the longitudinal crack length reaching 40% of the span. The vertical crack height can get the lower edge of the paving layer, increasing the distance from the load position, and the cracking height decreases symmetrically. Under an ultimate load, the hinge concrete of conventional reinforcement and pinned reinforcement hollow-core slab bridges showed significant damage in 30–70% and 40–60% of the span, respectively. Compared with the conventional reinforcement bridges, the cracking load and ultimate load of the pinned reinforcement bridges increase by 28.57% and 58.14%, respectively, and the relative deflection under 420 kN load reduces by 97.95%. The hollow slab bridges have improved the force performance and thus enhanced the integrity of the hollow-core slab bridges.

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Section: Introductionmentioning

confidence: 93%