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KR-102964168-B1 - TRUSS BRIDGE WITH ABDOMINAL REINFORCEMENT H-BEAM MEMBER AND EXPANDED CONNECTIONS

KR102964168B1KR 102964168 B1KR102964168 B1KR 102964168B1KR-102964168-B1

Abstract

A truss bridge having a web-reinforcing H-beam member and a widening connection is disclosed. The truss bridge having a web-reinforcing H-beam member and a widening connection according to the present invention comprises an upper chord, a lower chord, and a diagonal member provided by H-beams, wherein the upper chord and the lower chord are provided with a closed cross-section by combining a web reinforcement plate, and the upper chord and the lower chord extending in the longitudinal direction of the truss bridge are connected by a widening flange section in which the upper and lower flanges are expanded, and at the connection section, the H-beam is closed except for the widening flange section.

Inventors

  • 이보베
  • 김의헌

Assignees

  • (주)브릿지팩토리

Dates

Publication Date
20260513
Application Date
20250117

Claims (10)

  1. In a truss bridge comprising an upper chord, a lower chord, and diagonal members provided by H-beams, The above upper and lower chords are formed into a closed cross-section by combining a web reinforcement plate, and The upper and lower chords extending in the longitudinal direction of the above truss bridge are connected by widened flange sections in which the upper and lower flanges are expanded, and In the portion connected by the widening flange, the H-beam is closed except for the widening flange, and The above widened flange section is, A widening section in which the widths of the upper and lower flanges of the upper and lower chords are gradually expanded; An extended joint portion whose length is further extended from the widened portion to the end; and It includes a widening slice joint that connects an upper chord or a lower chord while making surface contact with the extension joint at the upper and lower ends of the extension joint; The transversely widened extension length of the widened portion and the extended joint portion is at least 40% of the width of the upper flange or lower flange, and The above widening slice joining part is, A widening connecting plate provided at the upper portion of a first extension connecting part extending from the upper flange and at the lower portion of a second extension connecting part extending from the lower flange to connect the upper flange and the lower flange; and A truss bridge having a web-reinforcing H-beam member and a widening connection section, comprising: a finishing connection plate provided at the lower part of a first extension connection section extending from the upper flange and at the upper part of a second extension connection section extending from the lower flange to connect the upper flange and the lower flange.
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  4. In paragraph 1, A truss bridge having a web reinforcement H-beam member and a widening connection section, comprising: a vertical reinforcement plate that is vertically connected to the end connection plate of the upper flange and the end connection plate of the lower flange, respectively, and is provided at the end of the web reinforcement plate to close the portion provided with the web reinforcement plate and the web.
  5. In paragraph 1, At the joint of the truss bridge where the upper or lower chord meets the diagonal members and transverse beams, the upper or lower chord is closed by a web reinforcement plate and a pair of finishing reinforcements, and A truss bridge having a web-reinforcing H-beam member and a widening connection, reinforced by providing a joint reinforcement between the first and second finishing reinforcements.
  6. In paragraph 1, Lifting lugs for lifting the truss bridge are provided at the ends of the truss bridge, and The above lifting lug is a truss bridge having a web-reinforcing H-beam member and a widening connection section provided at the point where the ends of the diagonal member and the lower chord meet.
  7. In paragraph 6, The above lifting lug is reinforced by a lug reinforcement, and The above lug reinforcement is provided at the end point of the truss bridge and is provided with a pair of lifting lug reinforcement plates to wrap around the lifting hook from the left and right sides, and is a truss bridge having a web reinforcement H-beam member and a widening connection.
  8. In paragraph 6, A truss bridge having a web reinforcing H-beam member and a widening connection, wherein a support member is provided at the lower chord end point of the truss bridge provided with the above lifting lug, and the support member is provided in multiple numbers spaced apart from the third finishing reinforcing member.
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  10. In paragraph 1, A truss bridge having a web-reinforced H-beam member and a widened connection, characterized in that when the widened extension length of the upper or lower flange width is 40% of the width before extension, the out-of-plane stiffness of the H-beam with only web reinforcement plates applied to the upper and lower flanges is increased by more than three times.

Description

Truss bridge with abdominal reinforcement H-beam members and expanded connections The present invention relates to a truss bridge having a web-reinforcing H-beam member and a widening connection part, wherein a web-reinforcing plate is applied to the H-beam of the truss member to form a closed cross-section and a widening flange is applied when connecting. A truss bridge refers to a bridge structured by arranging multiple straight members in a triangular shape and connecting them to one another. As shown in Fig. 1a, in the case of H-beams, which are widely used as main members (upper chord, lower chord) of truss bridges, the strong axis and the weak axis are distinguished, and the weak axis exhibits bending stiffness at a level of about 30% of the strong axis. Since truss members are axially dominant members, variations in the strong-weak axis direction have a negligible effect on the safety of the member during normal loading, which is mainly vertical behavior; however, during lateral behavior, the difference in safety according to the strong-weak axis direction is clear, so the direction of the load can act as an important variable. When H-beam members are arranged along the vertical axis of the upper and lower chords in a truss, the lateral stiffness is weak during storms and there is a weakness in wind resistance safety. This is because the cross-section subjected to wind pressure is blocked by the upper and lower flanges, causing a large drag force to act, making it vulnerable to wind. As shown in Fig. 1b, if the H-beam strong axis of the upper and lower chords is applied in the lateral direction to compensate for the weak lateral stiffness of the truss member, water accumulation occurs on the upper chord, causing the member to corrode, or the corrosion is accelerated due to the continued accumulation of water at the connection point. In addition, in the case of a truss structure where bending moments occur in the in-plane direction in the upper and lower chords, there is a problem that the arrangement of the upper and lower chords in the weak axis direction is structurally very weak. FIGS. 1A and 1B are exemplary drawings showing a truss bridge with H-beams arranged according to the prior art. FIG. 2 is a perspective view showing a truss bridge having a web-reinforcing H-beam member and a widening connection part according to an embodiment of the present invention. FIG. 3 is a perspective view showing a widening connection part according to an embodiment of the present invention, FIG. 4 is a perspective view showing a nodal portion according to an embodiment of the present invention, FIG. 5 is a perspective view showing a lifting lug according to an embodiment of the present invention, FIGS. 6a and 6b are conceptual diagrams illustrating the effects of a widening connection part according to an embodiment of the present invention. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals. Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Hereinafter, a truss bridge (100) having a web-reinforcing H-beam member and a widening connection part according to an embodiment of the present invention will be described in detail with reference to the drawings. A truss bridge having a web-reinforcing H-beam member and a widening connection section according to an embodiment of the present invention includes an upper chord (120), a lower chord (110), a diagonal member (130), a cross beam (140), a brace (150), a widening flange section (160), a joint section (170), and a lifting lug (180) provided as H-beams. The upper chord (120) and lower chord (110) are formed into a closed cross section by combining a web reinforcement plate, and the rigidity of the weak axis, which was weak, is reinforced by the web reinforcement plate. In addition, due to the structural characteristics of a truss bridge, the axial force of the member is dominant and lateral resistance during storms is required. The cross section can be arranged more efficiently than a conventional H-beam in which the strong axis and weak axis are separated, and the size of the transverse beam (140) and brace (150) can be minimized by increasing the lateral rigidity of the upper chord (120) and lower chord (110). In the lower chord (110), the abdominal reinforcing plate (114) is connected vertically at the ends of the upper flange (111) an