DK202070402A1

DK202070402A1 - Bridge span

Info

Publication number: DK202070402A1
Application number: DKPA202070402A
Authority: DK
Inventors: Adamcio Andrzej; Wilczynski Wojciech
Original assignee: Przed Wielobranzowe Anmet Andrzej Adamcio; Ignacy Lukasiewicz Rzeszow Univ Of Technology
Priority date: 2019-06-26
Filing date: 2020-06-19
Publication date: 2021-06-10
Also published as: NL1043707B1; NL1043707A9; DK180876B1; PL244964B1; GB2588990B; DE102020116717A1; NL1043707A; GB202009287D0; GB2588990A; PL430403A1

Abstract

According to the invention, the bridge span comprising at least one girder and platform is characterized in that at least one wind turbine rotor blade (4) constituting the girder (1) is fitted with ribs (5) and the platform (2) is attached to the ribs (5).

Description

DK 2020 70402 A1 Bridge span The subject of the invention is a bridge span of a footbridge or road bridge, made partly of composite materials.

Known are bridges and footbridges made of composite components by infusion or finished composite parts, which are built like steel bridges, but steel is substituted with composites. However, due to deep-rooted traditions in bridge construction and the relatively high material costs for the construction of bridges and footbridges, composites are not widely used.

From the patent description PL 200595, a footbridge is known, consisting of at least one composite segment formed of detachable and / or inseparably connected bearing sheath with a cross-section similar to the letter "U", in its lower part provided with a bracing surface and with bracing side elements, where the balustrade railing is the main load-bearing element and constitutes the upper girder belt.

From the Polish patent specification 231211 a road bridge span is known, consisting of main transverse support girders and a platform slab, characterized by having at least two main girders with a box-like, open cross-section, made of fibre-reinforced plastic (FRP) composite materials, which are braced on ends with transverse support members and are permanently — joined to the platform slab, whereby the transverse support members and the platform slab are made of lightweight concrete reinforced with composite bars and stirrups made of FRP composite.

From the US patent US4079476 a structure of a footbridge made of FRP composite materials is known. The bridge span consists of one main girder with a U-shaped cross-section, whose webs are also a balustrade, the upper belt is shaped as a handrail, while the lower belt is also a footbridge. The girder is reinforced along the length with external ribs that ensure the stability of the girder shape and its torsional rigidity. All girder elements are made of FRP composite, made of fabrics, mats and glass rovings, arranged in a polymer resin matrix.

The purpose of the invention is to use ready-made composite elements for the construction of the bridge span as structural and load-bearing elements that could successfully compete with traditional solutions, also with regard to the total construction and operating costs. The purpose of the invention is also constructing a bridge span with excellent corrosion resistance, high

2 DK 2020 70402 A1 durability and low weight. According to the invention, the bridge span comprising at least one girder and platform is characterized in that at least one wind turbine rotor blade constituting the girder is fitted with ribs and the platform is attached to the ribs. Preferably one girder consists of two wind turbine rotor blades connected to each other by means of flanges.

Preferably, the ribs are provided with a cut-out of a shape matching the shape of the outer surface of the wind turbine rotor blade.

As a variant, the bridge span is equipped with truss ribs made of steel profiles of a shape matching the shape of the outer surface of the wind turbine rotor blade.

Preferably the bridge span is equipped with at least two supports attached to the outer ribs or outer ends of the wind turbine rotor blade.

As a variant, the ribs are connected to at least one transverse crossbar with an axis parallel to — the blade axis.

As a variant, a part of the platform is made as a step constituting a bench, connected to the blade.

— Wind turbine blades withdrawn from use after 25-30 years retain their full strength and properties. These properties allow them to be used for the construction of footbridges and bridges. The essence of the invention consists in the use of a wind turbine rotor blade as a load-bearing structural element of a bridge, i.e. as a girder. Such use of blades will allow creating completely new shapes and forms of bridge spans in comparison to those currently available, due to the ease of implementation and closed load-bearing structure, which allows to use the remaining space as needed. The blades are made of composite materials and their strength is comparable to traditional materials such as reinforced concrete or steel, while the strength of wood is significantly exceeded. Composite materials have low specific gravity of about one quarter that of steel. Thanks to this, the structure of the composite bridge is at least

3 DK 2020 70402 A1 half lighter compared to concrete or steel. The ribs attached to the blades provide additional stability to the girder shape and its torsional strength.

The bridge spans according to the invention allow the construction of both footbridges and — road bridges, over roadways or rivers. The invention is illustrated in the figure, in which fig. la shows a side view of a span of a footbridge, equipped with one girder consisting of one wind turbine rotor blade with ribs attached to the lower outer surface of the blade; fig. 1b shows a bottom view of a span of a footbridge, equipped with one girder consisting of one wind turbine rotor blade with ribs attached to the lower outer surface of the blade; fig 2a shows a side view of a span of a footbridge, equipped with one girder consisting of one wind turbine rotor blade with ribs attached to the upper outer surface of the blade; fig. 1b shows a bottom view of a span of a footbridge, equipped with one girder consisting of one wind turbine rotor blade with ribs attached to the upper outer surface of the blade; fig. 3 shows a side view of a span of a footbridge, equipped with a bench and one girder consisting of one wind turbine rotor blade with ribs attached to the lower outer surface of the blade; fig. 4a shows a side view of a span of a footbridge, equipped with one girder consisting of two — wind turbine rotor blades with ribs attached to the upper outer surface of the blades; fig. 4b shows a bottom view of a span of a footbridge, equipped with one girder consisting of two wind turbine rotor blades with ribs attached to the lower upper outer surface of the blades; fig. Sa shows side view of a road bridge span equipped with two girders, each consisting of two wind turbine rotor blades, with ribs attached to the upper outer surface of the blade; fig. Sb shows a bottom view of a road bridge span equipped with two girders, each consisting of two wind turbine rotor blades, with ribs attached to the upper outer surface of the blade; fig. 6a show a side view of a road bridge span equipped with four girders, each consisting of two wind turbine rotor blades, with ribs attached to the upper outer surface of the blade; fig. 6b shows a bottom view of a road bridge span equipped with two girders, each consisting of two — wind turbine rotor blades, with ribs attached to the upper outer surface of the blade; fig. 7 shows a span of a footbridge with truss ribs. List of symbols 1- Girder

4 DK 2020 70402 A1 2- Platform 3- Balustrade 4- Wind turbine rotor blade 5- Rib 6 Rib cut-out 7- Abutment 8- Crossbar 9- Support 10- — Step 11- Flange 12- — Driving deck 13- Pillar The span of the footbridge shown in fig. 1a and fig. 1b is equipped with one girder 1 and platform 2 with a balustrade 3, mounted on abutments not shown in the figure.

Girder 1, partly located above platform 2, is a thirteen-metre-long wind turbine rotor blade 4, to whose lower outer surface, nine ribs 5 made of steel and equipped with a cut-out 6 of a shape matching the shape of the lower outer surface of the blade 4 are attached by means of bolts not shown in the figure.

Attached to the ribs 5 using bolts not visible in the figure, on each side of the blade 4, is a wooden deck 2 with a balustrade 3 made of steel.

The span is three metres wide.

The span of the footbridge shown in fig. 2a and fig. 2b is equipped with one girder 1 and platform 2 with a balustrade 3. The span is mounted on abutments 8. Girder 1, located under the platform 2, is a twelve-metre-long wind turbine rotor blade 4, to whose upper outer surface, nine ribs 5 made of steel and equipped with a cut-out 6 of a shape matching the shape of the upper outer surface of the blade 4 are attached by means of bolts not shown in the figure.

The ribs 5 are connected to each other by means of a crossbar 8 welded to the ribs 5 whose axis is parallel to the axis of the blade 4. The bridge span is equipped with two concrete supports 9 made of reinforced concrete.

The concrete supports 9 have a cut-out matching the shape of the — outer upper surface of the blade 4 at the place of attachment at the ends of the blade 4. The concrete supports 9 are connected to the outer ribs 5 and the blade by means of bolt not shown in the figure.

A composite platform 2 with a steel balustrade 3 is attached to ribs 5. The span is two metres wide.

> DK 2020 70402 A1 The span of the footbridge shown in fig. 3 is equipped with one girder 1 and platform 2 with a balustrade 3, mounted on abutments not shown in the figure. Girder 1, partly located above platform 2, is a thirteen-metre-long wind turbine rotor blade 4, to whose lower outer surface, eight ribs 5 made of steel and equipped with a cut-out, not shown in the figure, of a shape matching the shape of the lower outer surface of the blade 4 are attached by means of bolts not shown in the figure. Attached to the ribs 5 using bolts not visible in the figure, on both sides of the blade 4, below its axis, is a wooden deck 2 with a balustrade 3 made of steel. The span is three metres wide.

— The bridge span is equipped with two supports 9 with a cut-out matching the shape of the outer bottom surface of the blade 4 at the place of attachment, attached to the bottom outer surface of the ends of the blade 4 and the outer ribs 5 using bolts not visible in the figure. Part of platform 2 is made as a step 10 constituting a bench, attached to part of blade 4, constituting a support.

The span of the footbridge shown in fig. 4a and fig. 4b is equipped with one girder 1 and platform 2 with a balustrade 3, mounted on abutments not shown in the figure. The girder 1 consists of two thirteen-metre-long wind turbine rotor blades 4, connected to each other with flanges 11 by means of bolts not shown in the figure, attached to threaded bushings originally embedded in the blade 4. Eighteen ribs 5, nine ribs 5 for each blade 4, made of steel with a cut-out 6 of a shape matching the shape of the upper outer surface of blade 4 are attached to the upper outer surface of the connected blades 4 using bolts not shown in the figure. Attached to the ribs 5 using bolts not shown in the figure is the composite platform 2 with the balustrade 3. The footbridge is two and a half metres wide. Blades 4 are located under platform 2.

— The road bridge span shown in fig. 5a and fig. 5b is equipped with two girders 1 parallel to each other and a platform 2 with a balustrade 3, mounted on abutments that are not shown in the figure. Each girder 1 consists of two fourteen-metre-long wind turbine rotor blades 4, connected to each other with flanges 11 by means of bolts not shown in the figure, attached to threaded bushings originally embedded in the blade 4. Eighteen ribs 5, nine ribs 5 for each — blade 4, made of steel with a cut-out 6 of a shape matching the shape of the upper outer surface of blade 4 are attached to the upper outer surface of each of the blades 4 using bolts not shown in the figure.

The blades 4 are placed under a 4.6 m wide concrete platform 2 attached to ribs 5 using bolts

9 DK 2020 70402 A1 not shown in the figure. A steel balustrade 3 is attached to platform 2 constituting a driving deck 12. The bridge has a load capacity of up to thirty tons.

The road bridge span shown in fig. 6a and fig. 6b is equipped with four girders 1 parallel to each other and a platform 2 with a balustrade 3, mounted on abutments 7. Each girder 1 consists of two thirteen-metre-long wind turbine rotor blades 4, connected to each other at the flanges 11 by means of bolts not shown in the figure, attached to 4 threaded bushings originally embedded in the blade. Eighteen ribs 5, nine ribs 5 for each blade 4, made of steel with a cut-out 6 of a shape matching the shape of the upper outer surface of blade 4 are attached to the — upper outer surface of each of the blades 4 using bolts not shown in the figure. The span of the road bridge is equipped with two supports 9 made of reinforced concrete of a shape matching the shape of the ribs 5 and the shape of the outer upper surface of the blades 4. The supports 9 are attached to the outer ribs 5 along their entire width by means of bolts not shown in the figure. The blades 4 are placed under an eight-metres-wide concrete platform 2 attached to ribs 5. Platform 2 forms two driving decks 12 and two girders 1 are located under each driving deck

12. A steel balustrade 3 is attached to platform 2. The bridge has a load capacity of up to thirty — tons. The bridge is supported by 9 supports on four pillars 13, two pillars at each end of the bridge. The span of the footbridge shown in fig. 7 is equipped with one girder 1 and platform 2 with a balustrade 3. The girder 1 consists of two thirteen-metre long wind turbine rotor blades 4 — connected to each other by means of flanges 11, to whose lower outer surface, thirteen truss ribs 5 made of steel profiles of a shape matching the shape of the lower outer surface of the blade 4 are attached by means of bolts not shown in the figure. A composite platform 2 with a steel balustrade 3 is attached to ribs 5 on each side of the blade.

Claims

7 DK 2020 70402 A1 Patent Claims

1. The bridge span comprising at least one girder and platform characterized in that at least one wind turbine rotor blade (4) constituting the girder (1) is fitted with ribs (5) and the platform (2) is attached to the ribs (5).

2. The bridge span according to claim 1 characterized in that one girder (1) consists of two wind turbine rotor blades (4) connected to each other by means of flanges (11).

3. The bridge span according to claim 1 or 2, characterized in that the ribs (5) are provided with a cut-out (6) of a shape matching the shape of the outer surface of the wind turbine rotor blade (4).

4. The bridge span according to any of claims 1 to 3, characterized in that it is equipped with truss ribs (5) made of steel profiles of a shape matching the shape of the outer surface of the wind turbine rotor blade (4).

5. The bridge span according to any of claims 1 to 4, characterized in that it is equipped with at least two supports (9) attached to the outer ribs (5) or outer ends of the wind turbine rotor blade (4).

6. The bridge span according to any of claims 1 to 5, characterized in that the ribs (5) are connected to at least one transverse crossbar (8) with an axis parallel to the blade axis (4).

7. The bridge span according to any of claims 1 to 6, characterized in that part of the platform (2) is made as a step (10) constituting a bench, connected to the blade (4).