Continuous variable amplitude waveform web i-beam

Abstract

This utility model relates to a continuously variable-wave-height corrugated web I-beam, comprising: an upper flange plate, a corrugated web plate, and a lower flange plate. The upper and lower flange plates are parallel, and the corrugated web plate is located between the upper and lower flange plates, connecting them. The cross-section of the corrugated web plate is composed of multiple waves connected sequentially, with the wave height gradually increasing from both ends to the middle of the corrugated web plate. This utility model differs from traditional corrugated web composite beams; the wave height of the corrugated web plate increases and decreases uniformly from both ends to the middle, with a relatively gentle transition, avoiding abrupt changes in cross-sectional stiffness and stress concentration that may occur under external loads, resulting in superior torsional stiffness performance.

Description

Technical Field

[0001] This utility model relates to the field of construction, and in particular to a continuously variable high-wave web I-beam. Background Technology

[0002] The world's first corrugated steel web PC composite girder bridge was the Cognac Bridge in France in 1986, with a span arrangement of 31m+43m+31m. Following this, the Maupre Bridge, Asterix Park Bridge, and Dole Bridge, among others, were constructed. Japan followed France's lead in building a large number of corrugated steel web PC composite girder bridges, with 232 such bridges completed as of July 2022. Subsequently, Germany and South Korea also began research and application of corrugated steel web PC composite girder bridges. As of 2022, over 400 corrugated steel web PC composite girder bridges had been built worldwide, including simply supported, continuous, continuous rigid frame, and cable-stayed bridges, with box girder cross-sections being the most common.

[0003] In my country, the first bridge of this type to be seen was the Changzheng Bridge in Jiangsu Province, completed in 2005. Subsequent bridges, such as the Pohe Bridge in Henan Province, the Sandaohe Middle Bridge in Qinghai Province, and the Juancheng Yellow River Bridge in Shandong Province, also utilized corrugated steel webs. In recent years, corrugated steel web bridges have seen rapid development in my country, ranging from simply supported beam bridges and continuous beam bridges to rigid frame bridges and cable-stayed bridges. As of 2022, my country had more than 160 corrugated steel web PC composite beam bridges that had been built or were under construction, with continuous beams and continuous rigid frames accounting for the largest proportions, reaching 38% and 41% respectively. Among them, the Shenzhen Dongbaohe Xin'an Bridge and the Guangxi Feilong Bridge, both already completed, have main spans of 156m and 185m respectively.

[0004] As a new structure, research on this topic in my country started relatively late. Based on existing literature, Chinese researchers and designers have gained some understanding of corrugated steel web beam bridges, but there are still problems that urgently need to be solved: for example, the torsional and distortion stiffness of the corrugated steel web section is lower than that of concrete box girders. How to further improve the torsional and distortion stiffness of such beams is still an urgent research issue. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This invention provides a continuously variable high-wave web I-beam, which aims to solve the problem of low torsional and distortion stiffness of existing corrugated steel beams.

[0007] (II) Technical Solution

[0008] To solve the above problems, this utility model provides a continuously variable high-wave web I-beam, which includes: an upper flange plate, a corrugated steel web plate, and a lower flange plate.

[0009] The upper flange plate and the lower flange plate are parallel, the corrugated steel web plate is located between the upper flange plate and the lower flange plate, and the corrugated steel web plate connects the upper flange plate and the lower flange plate;

[0010] The cross-section of the corrugated steel web is formed by multiple waves connected in sequence, and the height of the waves gradually increases along the direction from both ends of the corrugated steel web to the middle of the corrugated steel web.

[0011] Preferably, the corrugated steel web comprises a plurality of sequentially connected constituent units, the arrangement direction of the plurality of constituent units being the length direction of the corrugated steel web; the constituent unit comprises a trough plate, a left side plate, a crest plate, and a right side plate connected in sequence; the crest plate and the trough plate are parallel, and the distance between the crest plate and the trough plate is the wave height of the wave;

[0012] In two adjacent constituent units: the right side plate of one constituent unit is connected to the trough plate of the other constituent unit;

[0013] In the direction from both ends of the corrugated steel web to the middle of the corrugated steel web, the distance between the crest plate and the trough plate within the constituent unit gradually increases.

[0014] Preferably, the thickness of the trough plate, the left side plate, the crest plate, and the right side plate remains constant in all the constituent units.

[0015] Preferably, within one of the constituent units:

[0016] The trough plate is perpendicular to the left side plate, the left side plate is perpendicular to the crest plate, and the crest plate is perpendicular to the right side plate.

[0017] Preferably, within one of the constituent units:

[0018] The trough plate is connected to the left side plate via a first arc plate, the left side plate is connected to the crest plate via a first arc plate, and the crest plate is connected to the right side plate via a first arc plate.

[0019] Preferably, within one of the constituent units:

[0020] The angle between the left side plate and the wave crest plate is an obtuse angle, and the angle between the right side plate and the wave crest plate is also an obtuse angle.

[0021] Preferably, within one of the constituent units:

[0022] The trough plate is connected to the left side plate via a second arc plate, the left side plate is connected to the crest plate via a second arc plate, and the crest plate is connected to the right side plate via a second arc plate.

[0023] Preferably, within one of the constituent units:

[0024] The angle between the left side plate and the wave crest plate is an acute angle, and the angle between the right side plate and the wave crest plate is also an acute angle.

[0025] (III) Beneficial Effects

[0026] This invention differs from traditional corrugated steel web composite beams. The wave height of the corrugated steel web increases or decreases uniformly from both ends to the middle, and the transition of wave height is relatively gentle. This avoids abrupt changes in cross-sectional stiffness and stress concentration that may occur under external loads, resulting in superior torsional stiffness performance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the continuously variable high-wave web I-beam in this utility model;

[0028] Figure 2 This is the cross-section of the corrugated steel web in Example 1;

[0029] Figure 3 This is the cross-section of the corrugated steel web in Example 2;

[0030] Figure 4 This is the cross-section of the corrugated steel web in Example 3;

[0031] Figure 5 This is the cross-section of the corrugated steel web in Example 4;

[0032] Figure 6 This is the cross-section of the corrugated steel web in Example 5;

[0033] Figure 7 This is the cross-section of the corrugated steel web in Example 6;

[0034] Figure 8 This is a load diagram of the continuously variable high-wave web I-beam in the present invention during finite element analysis;

[0035] Figure 9 This is a load diagram of an I-beam in finite element analysis using existing technology.

[0036] [Explanation of Labels in the Attached Image]

[0037] 1: Upper flange plate; 2: Corrugated steel web plate; 21: Component unit; 22: Corrugated trough plate; 23: Left side plate; 24: Corrugated crest plate; 25: Right side plate; 26: First arc plate; 27: Second arc plate; 3: Lower flange plate. Detailed Implementation

[0038] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] This utility model provides a continuously variable high-wave web I-beam, comprising: an upper flange plate 1, a corrugated steel web plate 2, and a lower flange plate 3. The upper flange plate 1 and the lower flange plate 3 are parallel, and the corrugated steel web plate 2 is located between the upper flange plate 1 and the lower flange plate 3, connecting the upper flange plate 1 and the lower flange plate 3. The cross-sectional shape of the corrugated steel web plate 2 is formed by multiple waves connected sequentially, and the height of the waves gradually increases along the direction from both ends of the corrugated steel web plate 2 to the middle of the corrugated steel web plate 2.

[0043] In the technical solution provided by this utility model, a corrugated steel web 2 is provided between the upper flange plate 1 and the lower flange plate 3. This compensates for the deficiency that the torsional stiffness of the corrugated steel web 2 section is lower than that of the concrete box girder, thereby improving the torsional stiffness of the I-beam. During design, the configuration of diaphragms and stiffening ribs can be appropriately reduced, thus achieving the purpose of saving materials and simplifying processes. Unlike traditional corrugated steel web 2 composite beams, the wave height of the corrugated steel web 2 from both ends to the middle increases or decreases uniformly, resulting in superior torsional stiffness performance.

[0044] Furthermore, the corrugated steel web 2 includes multiple sequentially connected component units 21, the arrangement direction of which is the length direction of the corrugated steel web 2; the component unit 21 includes a trough plate 22, a left side plate 23, a crest plate 24, and a right side plate 25 connected in sequence; the crest plate 24 and the trough plate 22 are parallel, the cross section of one component unit 21 is a wave, and the distance between the crest plate 24 and the trough plate 22 is the wave height.

[0045] In two adjacent component units 21: the right side plate 25 of one component unit 21 is connected to the trough plate 22 of the other component unit 21. In the direction from both ends of the corrugated steel web 2 to the middle of the corrugated steel web 2, the distance between the crest plate 24 and the trough plate 22 in the component unit 21 gradually increases.

[0046] In the above scheme, the height between the crest plate 24 and the trough plate 22 within the constituent unit 21 gradually and uniformly increases from both ends towards the middle. The transition of wave height is relatively gentle, avoiding abrupt changes in cross-sectional stiffness and stress concentration that may occur under external loads. At the same time, there is sufficient construction space at the ends, allowing for the use of welding or bolting connection methods similar to ordinary I-beams, making construction relatively convenient. In addition, the thickness of the trough plate 22, the left side plate 23, the crest plate 24, and the right side plate 25 remains unchanged in all constituent units 21.

[0047] In Embodiment 1, within a component unit 21: the trough plate 22 is perpendicular to the left side plate 23, the left side plate 23 is perpendicular to the crest plate 24, and the crest plate 24 is perpendicular to the right side plate 25. That is, on the corrugated steel web 2, the crest plate 24 and the trough plate 22 are parallel to each other, and both the crest plate 24 and the trough plate 22 are perpendicular to the corresponding connected left side plate 23 or right side plate 25. Figure 2 As shown, the cross-section of the corrugated steel web 2 at this time is a rectangular continuous variable wave height corrugated curve.

[0048] In Embodiment 2, based on Embodiment 1, within a component unit 21: as follows: Figure 3 As shown, the trough plate 22 is connected to the left side plate 23 via the first arc plate 26, the left side plate 23 is connected to the crest plate 24 via the first arc plate 26, and the crest plate 24 is connected to the right side plate 25 via the first arc plate 26. At this time, the cross-section of the corrugated steel web 2 is a continuous variable wave height corrugated curve with rounded corners.

[0049] In Example 3, as Figure 4 As shown, within a component unit 21: the angle between the left side plate 23 and the wave crest plate 24 is an obtuse angle, and the angle between the right side plate 25 and the wave crest plate 24 is also an obtuse angle.

[0050] The trough plate 22, left side plate 23, crest plate 24, and right side plate 25 are sequentially connected as a whole. First, the continuous variable height corrugated steel web 2 is processed to the designed wave height (the distance between the trough plate 22 and the crest plate 24) using a bending method. The first component unit 21 has a wave height of 220mm, the second component unit 21 has a wave height of 300mm, the third component unit 21 has a wave height of 380mm, the fourth component unit 21 has a wave height of 460mm, and the fifth component unit 21 has a wave height of 540mm. Each component unit 21 has a length of 1600mm, and the corrugated steel web 2 has a thickness of 16mm. Then, from left to right, the corrugated steel web 2 is welded to the lower flange plate 3 using a double-sided full penetration fillet weld. The jig is then flipped so that the lower flange plate 3 is on top. Finally, the upper flange plate 1 is welded to the corrugated steel web 2 using a double-sided full penetration fillet weld.

[0051] In the finite element analysis, a force of 10 kN / m was applied to the upper flange 1 of the embodiment. 2 Under a uniformly distributed load, the torsional buckling characteristic value is obtained as 61.89 ( Figure 8 If a 1600 type corrugated steel web 2 is used, the torsional buckling characteristic value is 52.32. Figure 9 As can be seen, the present invention has good anti-torsional buckling performance. The use of the present invention in a corrugated steel web composite beam bridge will bring stronger overall stability and has better promotion value and application prospects.

[0052] In Example 4, based on Example 3, as follows: Figure 5 As shown, the trough plate 22 is connected to the left side plate 23 via the second arc plate 27, the left side plate 23 is connected to the crest plate 24 via the second arc plate 27, and the crest plate 24 is connected to the right side plate 25 via the second arc plate 27.

[0053] In Example 5, as Figure 6 As shown, within a component unit 21: the angle between the left side plate 23 and the crest plate 24 is an acute angle, and the angle between the right side plate 25 and the crest plate 24 is also an acute angle. At this time, the cross-section of the corrugated steel web 2 is a wedge-shaped continuous variable wave height corrugated curve.

[0054] In Example 6, based on Example 5, as follows: Figure 7 As shown, the trough plate 22 is connected to the left side plate 23 via a third arc-shaped plate, the left side plate 23 is connected to the crest plate 24 via a third arc-shaped plate (not shown), and the crest plate 24 is connected to the right side plate 25 via a third arc-shaped plate. At this time, the cross-section of the corrugated steel web 2 is a continuous variable wave height corrugated curve with a rounded wedge shape.

[0055] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A continuously variable amplitude waveform I-beam having a web characterized by, The continuous variable-wave high-corrugated web I-beam includes: an upper flange plate (1), a corrugated steel web plate (2), and a lower flange plate (3); The upper flange plate (1) and the lower flange plate (3) are parallel, the corrugated steel web plate (2) is located between the upper flange plate (1) and the lower flange plate (3), and the corrugated steel web plate (2) connects the upper flange plate (1) and the lower flange plate (3); The cross-section of the corrugated steel web (2) is formed by multiple waves connected in sequence, and the height of the waves gradually increases along the direction from both ends of the corrugated steel web (2) to the middle of the corrugated steel web (2).

2. The continuously varying wave height web I-beam of claim 1, wherein, The corrugated steel web (2) includes a plurality of sequentially connected component units (21), the arrangement direction of the plurality of component units (21) being the length direction of the corrugated steel web (2); the component unit (21) includes a trough plate (22), a left side plate (23), a crest plate (24), and a right side plate (25) sequentially connected; the crest plate (24) and the trough plate (22) are parallel, and the distance between the crest plate (24) and the trough plate (22) is the wave height; In two adjacent constituent units (21): the right side plate (25) of one constituent unit (21) is connected to the trough plate (22) of the other constituent unit (21); In the direction from both ends of the corrugated steel web (2) to the middle of the corrugated steel web (2), the distance between the crest plate (24) and the trough plate (22) in the constituent unit (21) gradually increases.

3. The continuously varying wave height web I-beam of claim 2, wherein, In all the constituent units (21), the thickness of the trough plate (22), the left side plate (23), the crest plate (24), and the right side plate (25) remains unchanged.

4. A continuously varying sag waveform I-beam as claimed in claim 2 or 3 wherein, Within one of the constituent units (21): The trough plate (22) is perpendicular to the left side plate (23), the left side plate (23) is perpendicular to the crest plate (24), and the crest plate (24) is perpendicular to the right side plate (25).

5. The continuously variable high-wave web I-beam as described in claim 4, characterized in that, Within one of the constituent units (21): The trough plate (22) is connected to the left side plate (23) via the first arc plate (26), the left side plate (23) is connected to the crest plate (24) via the first arc plate (26), and the crest plate (24) is connected to the right side plate (25) via the first arc plate (26).

6. A continuously varying sag waveform I-beam as defined in claim 2 or 3, wherein, Within one of the constituent units (21): The angle between the left side plate (23) and the wave crest plate (24) is an obtuse angle, and the angle between the right side plate (25) and the wave crest plate (24) is also an obtuse angle.

7. The continuously varying sag waveform I-beam of claim 6, wherein, Within one of the constituent units (21): The trough plate (22) is connected to the left side plate (23) via the second arc plate (27), the left side plate (23) is connected to the crest plate (24) via the second arc plate (27), and the crest plate (24) is connected to the right side plate (25) via the second arc plate (27).

8. A continuously varying sag waveform I-beam as defined in claim 2 or 3, wherein, Within one of the constituent units (21): The angle between the left side plate (23) and the wave crest plate (24) is an acute angle, and the angle between the right side plate (25) and the wave crest plate (24) is an acute angle.

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