Novel Crashworthy Device for Pier Protection from Barge Impact

Wang, W.; Morgenthal, Guido

doi:10.1155/2018/9385643

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…Corrugated plates of steel are intended to absorb energy and stiff guard outer panels made with PAFRC exhibit enhanced resistance to impact and ductility. A novel crashworthy device (Wang and Morgenthal, 2018b) was developed, which is comprised of vertically supported impact cap connected to the bridge pier using a series of steel beams in a frame-type arrangement. The sacrificial steel structure is designed to form plastic hinges for energy dissipation whilst limiting the force transmitted to the protected pier.…”

Section: Introductionmentioning

confidence: 99%

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Lü

Chen

Gao

et al. 2021

Advances in Structural Engineering

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A floating two-stage buffer collision-prevention system (FTBCPS) has been proposed to reduce the impact loads on the bridge pier in this paper. The anti-collision process can be mainly divided into two stages. First, reduce the ship velocity and change the ship initial moving direction with the stretching and fracture of the polyester ropes. Second, consume the ship kinetic energy with the huge damage and deformation of the FTBCPS and the ship. The main feature of the FTBCPS lies in the first stage and most of the ship kinetic energy can be dissipated before the ship directly impacts on the bridge pier. The contact stiffness value between the ship and the FTBCPS can be a significant factor in the first stage and the calculation method of it is the focus of this paper. The contact force, the internal force and the general equation of motion have been given in the first part. The structure model of the ship and the FTBCPS are then established in the ANSYS Workbench. After that, 38 typical load cases of the ship impacting on the FTBCPS are conducted in LS-DYNA. The reduction processes of the ship kinetic energy and the ship velocity in different load cases have been investigated. It can be summarized that the impact angle and the ship initial velocity are the main factors in the energy and velocity dissipation process. Moreover, the local impact force-depth curves have also been studied and the impact angle is found to be the only significant factor on the ship impact process. Next, the impact force-depth curves with different impact angles are fitted and the contact stiffness values are accordingly calculated. Finally, the impact depth range, the validity of the local simulation results and the consistency of the fitted stiffness value are verified respectively, demonstrating that the fitted stiffness values are applicable in the global analysis.

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Section: Introductionmentioning

confidence: 99%

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Lü

Chen

Gao

et al. 2021

Advances in Structural Engineering

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“…Da solche Konstruktio-nen häufig mit vergleichsweise hohen Kosten und recht großen Herausforderungen bei der Erstellung bzw. Erhaltung verbunden sein können, wurde in [11] Numerical evaluation of novel crashworthy device for pier protection from barge impact Barge impact is a potential hazard threatening the safety of bridge structures located in navigation waterways. To avoid direct contact between a barge and a bridge pier in an impact event, different types of protective structures have been developed and used in many bridges.…”

Section: Einführungunclassified

“…Structural detailing of connections is not focused on and to be analyzed in later investigations. [11] The frame structure connecting the cap and the bridge pier using steel beams for a sample bridge pylon foundation [11] len Biegebeanspruchungen im Bereich der oberen und unteren Riegel. Zur Dissipation der Anprallenergie sollen sich in klar definierten Zonen dieser Riegelprofile die plastischen Mechanismen mit ausgeprägten Deformationen entwickeln, was in Anlehnung an [12]…”

Section: Einführungunclassified

Numerische Untersuchungen einer energiedissipierenden Schutzvorrichtung gegen Schiffsanprall

2019

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Herrn Univ.‐Prof. Dr.‐Ing. habil. Frank Werner zur Vollendung seines 70. Lebensjahres gewidmet Ein Schiffsanprall stellt eine außergewöhnliche Beanspruchungssituation dar, die die Sicherheit von Brückenbauwerken im Bereich von Wasserstraßen gefährdet. Zur Vermeidung des unmittelbaren Anpralls gegen Brückenpfeiler kommen unterschiedliche Schutzvorrichtungen zum Einsatz. Derartige Schutzsysteme dissipieren einen Großteil der Anprallenergie durch die Entwicklung plastischer Deformationen, sodass die vom Pfeiler bzw. Schiff zu absorbierende Energie auf ein Minimum reduziert wird. In diesem Beitrag werden numerische Untersuchungen und das strukturelle Verhalten einer neuartigen kollisionssichernden Konstruktion vorgestellt, bei der sich beim Anprall plastische Mechanismen in klar definierten Bauteilbereichen entwickeln und übrige Konstruktionselemente im elastischen Zustand verbleiben. Da die Konstruktion nach einem Anprallereignis dadurch in weiten Bereichen nicht geschädigt ist, können sich Wiederherstellungsmaßnahmen auf lokal begrenzte Bereiche beschränken. Die konstruktive Durchbildung von Konstruktionsdetails steht bei den Untersuchungen nicht im Mittelpunkt und soll in weitergehenden Studien entwickelt werden.

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“…According to the protection mechanism of local scour [10,11], the protection measures for local scour of piers can be divided into two categories: active protection and passive protection. Active protection is carried out by changing the flow structure around the pier; passive protection is carried out by improving the antiscour capacity of the riverbed through the protective devices.…”

Section: Introductionmentioning

confidence: 99%

Research on the Wing‐Type Antiscour Device of Pier Based on Scour Test and Numerical Simulation

Wang

Shen

Chen

et al. 2021

Advances in Civil Engineering

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In order to reduce the local scour before the antiscour device of piers, this paper proposed an improvement on a “V-type” device. That was to say, wing plates were set on the surface of the “V-type” device to enhance the diversion and reduce the local scour. To explore the protection effect of the modified device, the inclination angles of the wing plates were set to three angles, and the scour characteristics around the device were studied through the flume scour test and numerical simulation test. The results showed that the wing plates can reduce the impact force of the diving flow which was at the front end of the protective device. Besides, they could also disturb the flow around both sides of the device and weaken its sediment carrying capacity. Thus, the local scour around the device was effectively reduced. Especially, when the wing plates were 30°, the performance of reducing the local scour was the best.

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Novel Crashworthy Device for Pier Protection from Barge Impact

Cited by 5 publications

References 9 publications

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Initial response mechanism and local contact stiffness analysis of the floating two-stage buffer collision-prevention system under ship colliding

Numerische Untersuchungen einer energiedissipierenden Schutzvorrichtung gegen Schiffsanprall

Research on the Wing‐Type Antiscour Device of Pier Based on Scour Test and Numerical Simulation

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