Assessment of serviceability limit state of vibrations in the UHPFRC-Wild bridge through an updated FEM using vehicle-bridge interaction

Nguyen, Khanh; Freytag, Bernhard; Ralbovsky, Marian; Río, Olga

doi:10.1016/j.compstruc.2015.04.001

Cited by 23 publications

(9 citation statements)

References 21 publications

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“…in which λ i denotes the assumed internal DOFs in the element and N and λ are self-defined. With equations (2) and (6), the element displacement is enhanced as…”

Section: Refined Solid Vehicle-bridgementioning

confidence: 99%

“…}denotes the modal assurance criteria [6] between the jth measured mode φ t and the j-th computed mode φ c ; χ i , α j and β j are weight factors to define the importance level of each residual term and are all taken as unity; n d = 5 is the total number of measured positions for displacement. e genetic algorithm [6] is implemented to resolve a set of parameters that minimize the objective function in equation (16) within a prescribed allowable tolerance, i.e., |f k static − f k−1 static | ≤ 10 − 5 . For reasonable updating results, it is prescribed that the change percent for E G and E D is within −5% and +20% whilst the absolute change percent for ρ G and ρ D is within 2%.…”

Section: Materials Parameters Of Concretementioning

confidence: 99%

“…us, these models are usually preferred particularly in long-span vehicle-bridge analysis to analyze the overall performance of bridge structure. In plate/shell bridge models [6,7], thin plate/shell theories neglecting the out-of-plane normal and shear strains are assumed; thus, the complete stress-state of the modeled structure cannot be pictured. Meanwhile, as plate/shell elements approximate the bridge deck by its mid-surface, other element types are needed for non-plate components such as the girders and piers, which induces additional constraints on the structure interface [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Refined Vehicle‐Bridge Interaction Analysis Using Incompatible Solid Finite Element for Evaluating Stresses and Impact Factors

Xie

Han

Yuan

2020

Advances in Civil Engineering

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e vehicle-bridge interaction can induce bridge vibration and consequently fatigue, durability deterioration, local damage, and even collapse of bridge structure. In this paper, a solid vehicle-bridge interaction (VBI) analysis method is developed to provide refined analysis on the bridge responses including displacement and local stress under vehicle loads. e incompatible solid finite element (FE) is introduced to model the bridge, where the element shear locking is alleviated by incompatible displacement modes without sacrificing the computational efficiency. Benchmark example shows the incompatible solid element has superior computational efficiency compared to the conventional solid element. By virtue of the mass-spring-damper vehicle model, the interaction between vehicle and bridge is simulated with point-to-point contact assumption and the coupled dynamic equations are solved via nonlinear iteration. A case study on a simply supported T-girder bridge is conducted to validate the developed solid VBI analysis method and then the dynamic impact factor (DIF) of the bridge is evaluated based on the computed stress results and compared to code values. Results show that the solid VBI analysis method yields more accurate time-history bridge responses including displacement and stress under moving vehicles than the grillage method despite higher computational cost. Particularly, it can simulate realistic stress distribution and concentration along any concerned sections as well as in local components, which can provide detail information on the bridge behavior under dynamic loads. On the other hand, the DIF based on the computed stress result generally agrees well with the code values except for heavy vehicles where the stress-based DIF is slightly higher than the value in Chinese code while lower than that of AASHTO, suggesting the value specified by Chinese code may underestimate the DIF of heavy vehicles in certain circumstances to which more attention should be paid.

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“…in which λ i denotes the assumed internal DOFs in the element and N and λ are self-defined. With equations (2) and (6), the element displacement is enhanced as…”

Section: Refined Solid Vehicle-bridgementioning

confidence: 99%

Section: Materials Parameters Of Concretementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Refined Vehicle‐Bridge Interaction Analysis Using Incompatible Solid Finite Element for Evaluating Stresses and Impact Factors

Xie

Han

Yuan

2020

Advances in Civil Engineering

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“…This is an additional problem that can cause a resonance effect [11][12][13]. There is a high probability of a group of people crossing a bridge causing low frequency vibrations, if their marching coincides with natural frequencies of the bridge; that is extremely dangerous, because this can cause damage to or destruction of the bridge structure [14].When it comes to the analysis of bridges for both scientific and design purposes, the finite element model (FEM) of a bridge is an effective tool for analyzing dynamic behavior of bridges [15,16].The main research aim is to obtain dynamic parameters of a footbridge at different static and dynamic loads and to compare the actual performance with FEM. In the first stage experimentally obtained self-vibration mode shapes were compared to theoretically calculated ones by applying finite element analysis The adequacy of experimental results was evaluated, also updating the theoretical FE model.…”

mentioning

confidence: 99%

“…When it comes to the analysis of bridges for both scientific and design purposes, the finite 57 element model (FEM) of a bridge is an effective tool for analyzing dynamic behavior of bridges 58 [15,16].…”

mentioning

confidence: 99%

The Influence of Different Loads on the Footbridge Dynamic Parameters

et al. 2020

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Bringing together the experience and knowledge of engineers allowed building modern footbridges as very slender structures. This in turn has led to structural vibration problems, which is a direct consequence of slender structures. In some footbridges, this problem occurs when natural construction frequencies are close to excitation frequencies. This requires a design methodology, which would ensure user safety and convenience of use of the footbridge in operation. Considering the aforementioned dynamic response, the analysis of the finite element model of a footbridge was conducted focusing on critical acceleration and deformation meanings. The model was based on the footbridge prototype located in Vilnius, Lithuania. Two different loading methods were developed to investigate the dynamic effects caused by people crossing a footbridge. The comparison of experimental and finite element model (FEM) results revealed that the footbridge in operation is within the limit values of comfort requirements in terms of its vibrations.

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Abschätzung von verkehrsinduzierten Schwingungen von Straßenbrücken vor Betonierarbeiten

Ralbovsky

Vorwagner

Kleiser³

et al. 2020

Beton und Stahlbetonbau

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Bei Fahrzeugüberfahrten über Brücken kommt es zur Interaktion zwischen Tragwerk und Fahrzeug, deren Zusammenhänge äußerst komplex und schwer vorhersagbar sind. Gerade bei anstehenden Bauarbeiten an bestehenden Betonbrücken müssen diese bei aufrechterhaltenem Verkehr stattfinden, wodurch der junge Beton während seiner Erhärtung mit Schwingungen belastet wird. Aber gerade im Zuge der Planung von Bauphasen oder Bauabläufen ist eine Abschätzung im Vorfeld hilfreich. Aus diesem Grund wurden Großrechenserien, basierend auf Berechnungsmodellen von ganzen Brückenpopulationen untersucht. Das Ziel war, die verkehrsinduzierten Schwingungen von Platten‐ und Plattenbalkenbrücken in gängigen Konfigurationen abzuschätzen, um bei der Planung von Bauarbeiten entsprechende Schritte zur Schonung des jungen Betons in seiner kritischen Erhärtungsphase setzen zu können. Dabei wurden die Brückenschwingungen durch transiente FE‐Simulationen bei einer Vielzahl von Lkw‐Überfahrten berechnet und einerseits die Brückeneigenschaften wie Spannweite, Schlankheit etc., andererseits auch die Überfahrtsparameter wie Straßenoberfläche, Fahrgeschwindigkeit und Spur variiert. Die Betrachtung einzelner Parameter zeigte sich dabei als unzureichend, weshalb aufbauend auf dem großen Datensatz ein Meta‐Modell in Form von einfachen Gleichungen gebildet wurde, welches den Einfluss mehrerer Parameter vereint. Das Meta‐Modell ermöglicht eine Erstabschätzung der zu erwartenden Schwingungsamplituden und soll als Unterstützung für die Planung von nötigen Maßnahmen dienen.

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Assessment of serviceability limit state of vibrations in the UHPFRC-Wild bridge through an updated FEM using vehicle-bridge interaction

Cited by 23 publications

References 21 publications

Refined Vehicle‐Bridge Interaction Analysis Using Incompatible Solid Finite Element for Evaluating Stresses and Impact Factors

Refined Vehicle‐Bridge Interaction Analysis Using Incompatible Solid Finite Element for Evaluating Stresses and Impact Factors

The Influence of Different Loads on the Footbridge Dynamic Parameters

Abschätzung von verkehrsinduzierten Schwingungen von Straßenbrücken vor Betonierarbeiten

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