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Truss element method without chord members and combined node bridge

A combination and bridge technology, applied in the direction of bridges, truss bridges, bridge forms, etc., can solve the problems of prolonging the construction period, increasing the workload on site, and many processing procedures, so as to achieve the effects of convenient construction and hoisting, shortening the construction period and reducing the cost

Active Publication Date: 2015-04-29
SHENZHEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In long-span trusses, bolts or high-strength bolt connections put forward higher requirements for installation accuracy, and construction errors will inevitably exist during the construction process, which will make it difficult to accurately locate, increase the workload on site, and prolong the construction period
2) Before forming the steel truss web PC girder, the unit members are all discrete, which increases the workload of hoisting and precise positioning, and requires a large number of construction supports
However, if the above-mentioned second problem is solved by increasing the upper and lower chords, the upper and lower chords are only used for construction and hoisting, which will increase the amount of materials used, the factory will have more processing procedures, and the cost will increase

Method used

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  • Truss element method without chord members and combined node bridge
  • Truss element method without chord members and combined node bridge
  • Truss element method without chord members and combined node bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Please refer to Figure 4 and 5 , this embodiment one includes two stringer tubes 282, 283 (that is, single elements, which can be steel pipe concrete), beam top plate 25 (or beam bottom plate 26), inner conduit 41, embedded plate 42a, shear force connector 43, Shear studs 44, stiffeners 45 and U-shaped steel bars 46.

[0044] The ports at the fixed ends of the two truss tubes 282 and 283 are arranged in a "eight"-shaped structure, and the embedded plate 42a is arranged at the end with a smaller opening in the "eight"-shaped structure, and the fixed ends of each truss tube are fixed with internal The conduit 41 is fixedly connected to the embedded plate 42a through the internal conduit 41, wherein the internal conduit 41 plays the role of auxiliary connection.

[0045] The shear connector 43 can be an S-PBL shear connector 43 or a T-PBL shear connector 43 . The shear connector 43 is in the shape of a plate with holes for reinforcing bars, and is fixedly connected to ...

Embodiment 2

[0050] Please refer to Figure 7 and 8 In the second embodiment, the difference from the first embodiment is that the embedded plates 42b corresponding to the two girder tubes are connected to each other to form an integrated structure.

Embodiment 3

[0052] Please refer to Figure 9 and 10 The difference between the third embodiment and the first embodiment is that, in the integrated joint structure of truss piers provided by the third embodiment, the stiffener plate 45 in the first embodiment is omitted.

[0053] In contrast, the truss-pier combined integral node structure provided by this application can fully solve the stress concentration of nodes, has a single function, and does not require additional coating anti-corrosion protection measures. The internal nodes of the structure are integral, and the force is clearly defined. PBL parts have large shear bearing capacity and good fatigue resistance; and the overall rigidity is good. Discrete unit elements can be formed into an integral truss section, without the need for upper chords and lower chords, which greatly facilitates construction and hoisting, and realizes the construction of steel webs without supports.

[0054] Further, based on the above-mentioned combi...

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PUM

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Abstract

The invention relates to a truss element method without chord members and a combined node bridge. In the combined node bridge, components are connected through truss combined integrated node structures in advance in an end-to-end manner, a combined integrated node structure which can be integrally carried, installed and dismounted is formed, and the components are connected to directly form a truss segment, the integrality of nodes is guaranteed, the stressing safety of the structure is is guaranteed, and through the truss combined integrated node structures, in particular to shearing force conencting pieces, discrete components form an integral truss segment without upper chord members and lower chord members, the integral truss segment can be constructed and hoisted very conveniently, and a steel web member can be constructed without supports.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a steel truss web PC composite bridge. Background technique [0002] Traditional steel truss sections have both upper and lower chords. Although the steel truss web PC bridge has no upper and lower chords, it has two difficulties: 1) The installation workload of the nodes is relatively large, and the integrity is poor in terms of force, which is easy to cause structural damage. In the current field of truss girder bridges, especially in the field of steel truss web PC composite bridges, the joint connection methods used between unit elements mainly include bolts, riveting, high-strength bolt bolting, welding, etc. In long-span trusses, bolts or high-strength bolt connections put forward higher requirements for installation accuracy, and construction errors are inevitable during the construction process, which will make it difficult to accurately locate, increase the workload on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D6/00E01D21/00
CPCE01D2/00E01D6/00E01D19/00E01D2101/268E04C3/293E01D21/00
Inventor 李勇
Owner SHENZHEN UNIV
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