EP3325721B1 - Struktursystem für bogenbrücken mit mobilisierung externer reaktionen durch endgültige verbindungen - Google Patents

Struktursystem für bogenbrücken mit mobilisierung externer reaktionen durch endgültige verbindungen Download PDF

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Publication number
EP3325721B1
EP3325721B1 EP16763337.9A EP16763337A EP3325721B1 EP 3325721 B1 EP3325721 B1 EP 3325721B1 EP 16763337 A EP16763337 A EP 16763337A EP 3325721 B1 EP3325721 B1 EP 3325721B1
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EP
European Patent Office
Prior art keywords
arch
deck
ties
bridge structure
structure according
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Not-in-force
Application number
EP16763337.9A
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English (en)
French (fr)
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EP3325721A1 (de
Inventor
João FONSECA
Clemente PINTO
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D4/00—Arch-type bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges

Definitions

  • the invention relates to the design and construction of bridges and other civil engineering structures, for roads, railways or other purposes, consisting of at least one arch and one deck.
  • the arch may be made of any material, having any geometric shape, with a curved or polygonal axis and any cross section.
  • the invention enables in particular the construction of bridges with slender arch and thin deck for large spans.
  • the reduced bending stiffness of the slender arch and thin deck is compensated by controlled stiffness addition to the structure by means of prestressed ties, such as steel cables.
  • the external anchored ties system is the main responsible for balancing of variable loads, so that the bending stiffness and strength of arch and deck can therefore be reduced.
  • the configuration of the ties system can be adjusted to the geometric available conditions, in particular to the relative position of arch and deck.
  • the efficiency of the additional stiffness system increases with the verticality of the ties.
  • the maximum efficiency corresponds to the vertical direct connection between the arch and the ground.
  • the ties system configuration may imply axial forces in the deck.
  • intermediate expansion joints (4) may be adopted in the deck, which must be fixed longitudinally with double supports (6).
  • the invention is characterized by controlled addition of stiffness to arch bridge structures, through permanent ties systems (3) prestressed between external anchorages (8) and the arch (1) or the deck (2), in order to mobilize reactions.
  • the prestressed ties (3) can be arranged in different configurations, with inclined or vertical axis, connecting either the arch (1) or the deck (2) to the ground.
  • the ties (3) are prestressed in order to remain tensioned under the effect of external actions, ensuring effective addition of stiffness both in tension and in relative compression.
  • the stiffness of the ties system (3) depends on the area of the respective cross section and on the inclination of the respective axes. By increasing the verticality of the ties it is possible to increase the added stiffness without increasing the cross section.
  • the invention relates to an arch bridge structure according to claim 1, with internal hinges, comprising portions articulated to each other, ensuring no bending by centering the compressive forces in the axis of the hinges.
  • Such arch portions may be composed of slender straight elements under pure compression. It is possible to use prestressed and braced stonework slender struts.
  • the ties (3) inclined arrangement, between the deck and the external anchorages (8), causes axial forces in the deck.
  • forces are of unfavorable traction, like in structural concrete decks, it is possible to reduce them using expansion joints (4) internally and double supports (6) in the ends of the deck, connecting it longitudinally to the abutments.
  • the ties (3) vertical arrangement, prestressed between the arch and the ground, with external anchorages (8) distributed along the bridge, is a solution for direct transfer of vertical loads, through practically “invisible” "pillars". If the deck is suspended from the arch, the system of ties (3) anchored in the exterior, can follow the alignment of the suspension elements (9).
  • the columns (5) between the arch and the deck may be continuous or have hinged connections at the ends, the latter being preferably.
  • prestressed ties (3) for load transfer can simultaneously reduce the cross sections of the arch and of the deck, resulting in overall lightweight solutions.
  • the reduction of the arch and deck flexural stiffness allows a higher efficiency of the prestressed ties system (3), which would have to have greater cross section if the arch or the deck were stiffer.
  • Figure 1 shows the view of a first example of the present invention.
  • An arch (1) supports inferiorly a deck (2) through columns (5), using ties (3), prestressed and connected to external anchorages located near the arch abutments.
  • the deck has an internal expansion joint (4) and is horizontally supported at the ends by double supports (6).
  • the ties (3) are anchored in the exterior and connected to deck nodes, possibly through some of the columns.
  • antisymmetric loads For loads for which the arch has not anti-funicular shape, here generally designated "antisymmetric loads", the system behaves globally as a lightweight cable-tied structure, externally anchored or buttressed through the ties (3).
  • the deck may be discontinuous with expansion joints (4) inside, so that through prestressing of the ties (3) mainly compression forces arise in the arch (1) and in the deck (2).
  • the "horizontal" definitive connections of the deck to the exterior through the double support (6) are also favorable during construction, especially if the process is based on cantilevers growing from the abutments. Under the action of "antisymmetric loads” the system deforms activating the stiffness of the ties (3), pulling them on one side and compressing them on the other side. Deformations due to temperature variations and time dependent behavior of materials are accommodated by the expansion joint (4) inside.
  • Figure 3 shows a view of an alternative example of the invention, with ties (3) approximately vertical and externally anchored.
  • ties (3) approximately vertical and externally anchored.
  • a double support (6) can be indispensable at one end of the deck.
  • Figure 4 shows a view of an alternative example of the invention with ties (3) inclined and with external anchorages (8) concentrated in massive external blocks.
  • ties (3) inclined and with external anchorages (8) concentrated in massive external blocks it is convenient to support the deck "horizontally" at one end with a double support (6) releasing the displacements at the other end with a single support (7) that accommodates the stretching and contraction of the deck.
  • a double support (6) can be indispensable at one end of the deck.
  • the mobilization of the stiffness of the ties (3), when inclined, either during application of prestressing, either due to balancing of "antisymmetric loads" is direct, without involving axial forces in the deck.
  • the ties (3) can follow the alignments of the deck suspension elements (9).
  • the system of ties (3) prestressed below the deck may have a reduced visual impact especially in the case of decks at low height.
  • FIG. 6 An alternative embodiment of the invention, with respect to a slender, articulated arch, is shown in Figure 6 and corresponds to a construction of arch segments (10) in the form of laterally braced slender struts, with possible prefabrication and later assembly, with controlled addition of stiffness through a system of ties (3) prestressed in any of the configurations of Figures 1 to 5 .
  • the columns (11) may be built using elements similar to those of the arch segments (10) .
  • the ties (3), prestressed may for example be composed of multiple strands of high strength steel, corresponding to independent modular anchorages (12), linked to the exterior by metallic parts (13), shown in Figure 7 , which may also serve as connections to other elements of the bridge.
  • An example of application of the present invention corresponds to a road bridge, comprising an articulated arch with 250 m span and 40 m height, composed of segments (10) in form of prefabricated, laterally braced and prestressed stone ashlar struts.
  • the deck (2) behaves as a continuous beam with spans of 31 m, with an expansion joint (4) inside and is supported by two parallel articulated ashlar stone arches, with rectangular cross section of 2.5 m wide by 0.6 m thick.
  • Each of the ties (3) is inclined, comprising 4 cables of 12 or 16 prestressing steel strands, two in each arch.
  • the cross section of the deck (2) corresponds to a box girder with 1.8 m of total height, an upper slab 14 m wide, a lower plate 7 m wide and two vertical webs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Claims (13)

  1. Bogenbrückentragwerk, umfassend ein Deck (2), einen Bogen (1) mit inneren Gelenken, wobei der Bogen mit inneren Gelenken Teile umfasst, die miteinander gelenkig sind, um sicherzustellen dass es keine Biegung gibt durch Zentrieren der Druckkräfte in der Achse der Gelenke, wobei das Bogenbrückentragwerk umfasst weiterhin dauerhafte definitive Seilverbindungen (3), die zwischen äußeren unteren Verankerungen (8) und oberen Verankerungen an Querschnitten des Bogens (1) oder des Decks (2) vorgespannt sind, um Reaktionen zu mobilisieren und kontrollierte Steifigkeit an das Tragwerk zu addieren.
  2. Bogenbrückentragwerk nach Anspruch 1, umfassend Seilverbindungen (14), die zwischen dem Bogen (1) und dem Deck (2) verbunden sind.
  3. Bogenbrückentragwerk nach Anspruch 1, wobei sich die äußeren Verankerungen (8) in den Widerlagern des Bogens (1) befinden.
  4. Bogenbrückentragwerk nach Anspruch 1, wobei die äußeren Verankerungen (8) in zwei oder mehr massiven Blöcken konzentriert sind, die sich unter dem Bogen (1) befinden.
  5. Bogenbrückentragwerk nach Anspruch 1, wobei die äußeren Verankerungen (8) durch mehrere Verankerungsblöcke verteilt sind, die sich unter dem Bogen (1) befinden.
  6. Bogenbrückenstruktur nach Anspruch 1, wobei das Deck (2) in einer Ebene angeordnet ist, die dem Bogen (1) überlegen ist.
  7. Bogenbrückenstruktur nach Anspruch 1, wobei das Deck (2) in einer Ebene unterhalb des Bogens (1) angeordnet ist.
  8. Bogenbrückenstruktur nach Anspruch 1, wobei das Deck (2) in einer Zwischenebene zwischen den Stützen des Bogens (1) und seinem oberen Abschnitt angeordnet ist.
  9. Bogenbrückenstruktur nach Anspruch 1, umfassend eine innere Dehnungsfuge (4) im Deck (2) und doppelte Auflagern (6) an den Enden.
  10. Bogenbrückenstruktur nach Anspruch 1, wobei der Bogen (1) aus vorgespannten und verspannten Streben (10) besteht.
  11. Bogenbrückenstruktur nach einem der Ansprüche 1 bis 10, wobei sich der Bogen (1) und das Deck (2) in derselben Ebene befinden.
  12. Bogenbrückenstruktur nach einem der Ansprüche 1 bis 10, wobei der Bogen (1) oder das Deck (2) eine räumliche Achse aufweisen.
  13. Bogenbrückenstruktur nach einem der Ansprüche 1 bis 10, wobei der Bogen (1) nicht symmetrisch ist.
EP16763337.9A 2015-07-21 2016-07-20 Struktursystem für bogenbrücken mit mobilisierung externer reaktionen durch endgültige verbindungen Not-in-force EP3325721B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT108710A PT108710A (pt) 2015-07-21 2015-07-21 Sistema para estrutura de ponte de arco, com mobilização de reacções exteriores através de tirantes definitivos.
PCT/PT2016/050018 WO2017014660A1 (en) 2015-07-21 2016-07-20 Structural system for arch bridges, with mobilization of external reactions through definitive ties

Publications (2)

Publication Number Publication Date
EP3325721A1 EP3325721A1 (de) 2018-05-30
EP3325721B1 true EP3325721B1 (de) 2020-10-21

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Application Number Title Priority Date Filing Date
EP16763337.9A Not-in-force EP3325721B1 (de) 2015-07-21 2016-07-20 Struktursystem für bogenbrücken mit mobilisierung externer reaktionen durch endgültige verbindungen

Country Status (3)

Country Link
EP (1) EP3325721B1 (de)
PT (1) PT108710A (de)
WO (1) WO2017014660A1 (de)

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CN108086172A (zh) * 2017-12-19 2018-05-29 湖北省交通规划设计院股份有限公司 一种采用调整恒载压力线加固空腹式拱桥的方法
CN108166375B (zh) * 2018-01-11 2024-08-09 广西大学 预张拱桥
CN108460197B (zh) * 2018-02-09 2021-09-24 广西交通科学研究院有限公司 基于变形量控制的拱上建筑拆装方案优选方法
CN108416116B (zh) * 2018-02-09 2021-10-22 广西交通科学研究院有限公司 拱脚增大截面加固抛物线拱时拱顶压重量的确定方法
CN108411760B (zh) * 2018-04-09 2023-10-03 广西大学 拉杆拱桥
CN108547212A (zh) * 2018-07-02 2018-09-18 西北农林科技大学 一种能够防止拱肋面内失稳变形的拱桥结构
CN108677682A (zh) * 2018-08-09 2018-10-19 广西大学 新型上承式拱桥
CN110016854B (zh) * 2019-03-14 2024-07-19 中铁二院工程集团有限责任公司 一种矮塔斜拉加劲组合拱桥构造
CN110130233A (zh) * 2019-05-06 2019-08-16 中铁大桥（南京）桥隧诊治有限公司 一种适用于双曲拱桥拱上建筑的改造方法
CN112595499B (zh) * 2019-09-16 2023-07-25 深圳市建筑设计研究总院有限公司 一种次生自内力结构的预内力计算方法
CN110878516B (zh) * 2019-12-17 2024-06-21 林同棪国际工程咨询（中国）有限公司 增加主梁横向刚度的下承式系杆拱桥
CN111608084B (zh) * 2020-05-29 2022-03-29 中国铁建大桥工程局集团有限公司 一种钢筋混凝土拱桥拱圈节段整体预制拼装施工方法
CN112796198B (zh) * 2021-02-04 2025-07-22 长安大学 一种采用uhpc湿接缝连接的空腹式拱桥体系及施工方法
CN113944095A (zh) * 2021-11-05 2022-01-18 上海市政工程设计研究总院（集团）有限公司 一种下承式系杆拱桥及其施工方法
CN117211148A (zh) * 2023-01-31 2023-12-12 广州市城建规划设计院有限公司 一种桥面分离的梁拱组合v形下承拱式桥梁结构

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DE3621611A1 (de) * 1986-06-27 1988-01-14 Schlaich Joerg Bogenbruecke und verfahren zu deren herstellung
CH706630B1 (de) * 2013-05-14 2013-12-31 S & P Clever Reinforcement Company Ag Verfahren zum Vorspannen eines Stahlbauwerkes sowie damit vorgespanntes Stahlbauwerk.

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PT108710A (pt) 2017-01-23
WO2017014660A8 (en) 2017-03-16
WO2017014660A1 (en) 2017-01-26
EP3325721A1 (de) 2018-05-30

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