Incremental Launching Construction Control of Long Multispan Composite Bridges

Wang, J. F.; Lin, Jingxia; Xu, Rongqiao

doi:10.1061/(asce)be.1943-5592.0000737

Cited by 19 publications

(9 citation statements)

References 11 publications

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“…Incremental launching has been proven to be a convenient and economical method for the construction of bridges [1], [2]. In recent years, the incremental launching method has been frequently used for several bridges around the world, such as Reno Bridge in Italy [3], River Esk bridge in England [4], the Bridge Pavilion in Spain [5] and Jiubao Bridge in China [6].…”

Section: Introductionmentioning

confidence: 99%

Analysis of height difference between three trusses of a steel truss bridge during incremental launching

Chen

2018

Stahlbau

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Analyse der Höhendifferenz zwischen drei Fachwerken einer Stahlfachwerkbrücke während des Taktschiebeverfahrens. Das Taktschiebeverfahren ist aufgrund seiner Platz‐, Zeit‐ und Ausführungsvorteile weit verbreitet im Ingenieurbau. Die Brücke über den gelben Fluss in Jinan ist eine doppelstöckige Eisenbahnbrücke aus Stahlfachwerk mit versteiften Tragelementen, die im Taktschiebeverfahren errichtet wird. Ein Höhenunterschied zwischen den drei Hauptfachwerkträgern infolge eines Montagefehlers kann während des Vorschubs zu großen Reaktionskräften an einem oder zwei Gleitschuhen unter den drei Hauptfachwerken führen, da die Brücke sehr schwer ist. Hierbei ist nicht auszuschließen, dass die Belastung der Hauptbrücke und der Traggerüste das zulässige Maß übersteigt und die Brückenkonstruktion Schaden nimmt. Um den Einfluss veränderlicher Höhendifferenzen auf die Belastung der gesamten Brücke einschließlich der Traggerüste zu untersuchen, werden mithilfe einer Finite‐Elemente‐Simulation die globalen und lokalen Belastungen der gesamten Brücke analysiert. Die Ergebnisse zeigen, dass bei einer Höhendifferenz von mehr als +20 mm oder weniger als –30 mm die Spannungen der Traggerüste in der Nähe des Pfeilers die zulässige Belastung während des Vorschubs übersteigen. Die Höhendifferenzwerte der drei Fachwerke müssen daher begrenzt werden, um die Sicherheit der Konstruktion zu gewährleisten. Die Grenzwerte der Höhendifferenz wurden mithilfe eines Finite‐Elemente‐Modells der gesamten Brücke bestätigt. Darüber hinaus liegt im lokalen Finite‐Elemente‐Modell die lokale Konstruktion bei Auftreten der bestätigten Höhendifferenz im Sicherheitsbereich, was die Rationalität der bestätigten Höhendifferenzwerte sicherstellt. Die Ergebnisse der Finite‐Elemente‐Simulation entsprechen in etwa denjenigen einer tatsächlichen Messung während des Vorschubs, und die angemessenen Grenzwerte für die Höhendifferenz zwischen drei Fachwerken liegen bei +15 mm bzw. –25 mm. Bei diesen Grenzwerten handelt es sich um die für das Bauteil vorgesehenen Bauvorgabewerte. Abschließend werden Lösungen zur Verringerung des Einflusses des Höhenunterschiedes aufgezeigt.

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Section: Introductionmentioning

confidence: 99%

Analysis of height difference between three trusses of a steel truss bridge during incremental launching

Chen

2018

Stahlbau

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“…The incremental launching method is widely used to construct various kinds of bridges in urban, canyon, the regions across rivers and offshore where traffic, geology and topography conditions are limited [1][2][3][4][5][6]. Due to the excellence on device integration, high bearing capacity and excellent implementation of construction compare to bracket erecting and dragging-type launching method [7][8][9], the bridge girder with a temporary guiding nose [10][11] is capable of being assembled on one side of the obstacle and launched direct to the other side without previous constructing a large number of temporary supports or using large-scale hoisting devices.…”

Section: Introductionmentioning

confidence: 99%

Posture Determination for Bridge Girder and Distributed Incremental Launching Devices

Zhang¹,

Zhang²,

Chen³

et al. 2015

Proceedings of the 2015 International Conference on Advanced Manufacturing and Industrial Application

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Abstract-The posture of the bridge girder plays a very important role for the safety and efficiency of the bridge construction. This paper mainly proposed a mathematical method for determining the position and orientation of bridge girder and distributed Incremental Launching devices. Firstly, the background of incremental launching construction is introduced. In addition, the mechanical and hydraulic design of the launching device and its iterated construction movements are described. By analyzing the characteristics of incremental launching method and the distributed launching devices, the posture of single device and the bridge girder are determined mathematically. Further, the posture determination method is integrated into the bridge launching construction surveillance system. The application of this method is practically verified in the launching construction of Fengxi suspension bridge, finally.

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“…The bridge girder segments are manufactured in local or nearby factory and transported to the construction site in terms of vehicles or ships. With the help of the temporary guiding nose [4] pre-weld on the first segment, the bridge girder is capable of being continuously launched by the IL system and intermittently assembled till the whole girder is launched in place [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Launching Trajectory Planning for the Variable Cross-Section Steel Box Girder

Zhang¹,

Zhang²,

Guo³

et al. 2015

Proceedings of the 2015 International Conference on Advanced Manufacturing and Industrial Application

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Abstract-The incremental launching method has been widely used to construct various kinds of bridges in regions where traffic, geology and topography conditions are limited. Thanks to its excellece on on-site prefabrication, fast assembly and intelligent control, the incremental launching systems are applied in mumerous kinds of bridge construction projects. However, most of the bridges are successfully built without having the obvious curve features on working interfaces. This paper mainly proposed an adaptive incremental launching method for the Dongfeng Avenue freeway L7 89m viaduct launching project, to which the traditional incremental launching method is hard to be applied. Firstly, the construction background is firstly introduced. Then, the corresponding launching trajectory is planned according to the continuous variation of curve features of the working interfaces. To realize the launching trajectory, the control stratege and kinematic conditions of multi-point on-site incremental launching devices are described. Further, the application and verification of the launching construction are analized and discussed. Finally, the proposed new incremental launching method and the results of trajectory planning for the variable cross section steel box girder are concluded.

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Incremental Launching Construction Control of Long Multispan Composite Bridges

Cited by 19 publications

References 11 publications

Analysis of height difference between three trusses of a steel truss bridge during incremental launching

Analysis of height difference between three trusses of a steel truss bridge during incremental launching

Posture Determination for Bridge Girder and Distributed Incremental Launching Devices

Launching Trajectory Planning for the Variable Cross-Section Steel Box Girder

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