Rigid-flexible combined pull rod structure for improving prestress effect of stay cable

A technology of prestressed and cable-stayed cables, which is applied in the direction of cable-stayed bridges, bridge parts, bridge forms, etc., and can solve problems such as inability to overcome the shortcomings of rigid tie rods and not providing them

Pending Publication Date: 2021-09-07
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology still cannot overcome the respective shortcomings of rigid tie rods and flexible cables, and does not provide technical enlightenment on how to solve them

Method used

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  • Rigid-flexible combined pull rod structure for improving prestress effect of stay cable
  • Rigid-flexible combined pull rod structure for improving prestress effect of stay cable
  • Rigid-flexible combined pull rod structure for improving prestress effect of stay cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] like Figure 1 to Figure 4 As shown, a specific embodiment of the structure of the rigid-flexible combined tie rod of the present invention at least includes: a tie rod 1 , a stay cable 2 and a stay cable pipe 3 . The cable conduit 3 is located inside the pull rod 1 , and the cable 2 is located inside the cable conduit 3 .

[0050] Tie rod 1 is generally welded and formed by all-steel material, and is a rigid structural member, including the first section 11 fixedly installed with the oblique web bar above the bridge deck, and the second section 12 pre-embedded (or preset) in the box girder 4 of the main bridge , and the interlocking closing section 13 positioned between the first section 11 and the second section 12 when the construction is completed.

[0051] In different embodiments, the cross-sectional shape and size of the tie rod 1 are comprehensively selected according to various factors such as the mechanical performance of the specific structure, architectural...

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PUM

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Abstract

The invention discloses a rigid-flexible combined pull rod structure which at least comprises a pull rod, an inhaul cable and an inhaul cable pipeline. The inhaul cable pipeline is located in the pull rod, and the inhaul cable is located in the inhaul cable pipeline. The inhaul cable pipeline comprises a first pipeline and a second pipeline; the first pipeline and the second pipeline are locally overlapped in an inner and outer sleeving manner; the pull rod comprises a first section and a second section, and further comprises an inlaying closure section; when the inhaul cable is tensioned, the inhaul cable is arranged in the first section and the second section which are not connected in a penetrating mode; the first pipeline and the second pipeline can move relatively to adapt to the relative position requirement; after the inhaul cable is tensioned, the first pipeline and the second pipeline are connected in a closed mode; the inlaying closure section is inlayed between the first section and the second section; and the first section, the inlaying closure section and the second section are fixedly connected into a whole to form the pull rod. The overall rigidity and durability of the bridge are improved, and meanwhile the prestress effect of the stay cables in the rigid pull rods on the main bridge box girder is improved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a cable-stayed bridge. Background technique [0002] In the prior art, cable-stayed bridges need obliquely set stay cables or rods between their horizontally extending bridge span structure and their vertically extending bridge tower structure, so as to transmit most of the load of the bridge span structure to the bridge tower structure. [0003] The cable is a flexible structure, generally with a circular cross-section, and is mainly made of high-strength steel bars, steel wires or steel strands. During the normal use of the cable-stayed bridge, the flexible cables mainly bear the tension. [0004] The tie rod is a rigid structure, generally with a rectangular cross-section, and is mainly made of prestressed reinforced concrete. During the normal use of the cable-stayed bridge, the rigid tie rods can bear part of the pressure and torsion in addition to the tension. ...

Claims

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Application Information

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IPC IPC(8): E01D11/04E01D19/00E01D19/16E01D2/04
CPCE01D11/04E01D19/00E01D19/16E01D2/04
Inventor 傅梅陆元春吴冲徐优朱鹏志
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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