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Timber Bridges
Published in Wai-Fah Chen, Lian Duan, Bridge Engineering Handbook, 2019
Bents are support systems used for multispan bridges between the abutments. Essentially, timber bents are formed from a set of timber piles with lumber cross bracing. However, when the height of the bent exceeds that available for a pile, frame bents are used. Frame bents were quite common in the early days of the railroad, but, due to high cost of fabrication and maintenance, they are not used often for new bridges.
Piled foundations
Published in B.I. Dalmatov, R.B. Zeidler, Soil Mechanics, Footings and Foundations, 2020
Bent (usually reinforced-concrete) is designed for the condition of piercing by pillar or pile and for bending (if the planar development is significant), in accordance with foundation design following adequate standards for reinforced-concrete structures.
A New Bridge Over the Rhine River
Published in Structural Engineering International, 2018
Didier Guth, Diter Braet, Patrick Van Severen, Sébastien Meyer, Denis Royer, Christian Cremona, Elvis Darnault
Assembling the arches required more than 300 t of erection equipment (Fig. 10). The arch segments were placed on the assembly bents by means of two mobile cranes, with scaffolding offering accessibility for adjustments and welding. The hangers were mounted in one single piece to avoid turnbuckles, which are considered unsightly by the architect. They were installed after the welding of the arch segments. Once the hangers were installed, the bents were dismantled. More than 15 construction phases were necessary to raise and lower the deck onto the bearings due to its length and flexibility in the absence of arches and hangers. The bents used to assemble the first deck were then reused to assemble the second deck.