Device for preventing inclined crack of web in anchoring area at end part of prestressed small box girder

A technology of end anchorage and small box girders, which is applied to bridges, bridge parts, bridge materials, etc., can solve problems such as cracking and complex stress states in the anchorage area at the end of box girders, and achieve convenient construction, good application value, and economic benefits significant effect

Pending Publication Date: 2021-07-23
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the stress state of the anchorage area at the end of the box girder is relatively complex, even if the above measures are taken, the problem of cracking in this area often occurs

Method used

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  • Device for preventing inclined crack of web in anchoring area at end part of prestressed small box girder
  • Device for preventing inclined crack of web in anchoring area at end part of prestressed small box girder
  • Device for preventing inclined crack of web in anchoring area at end part of prestressed small box girder

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] The present invention is a device used to prevent oblique cracks in the web plate of the anchorage area at the end of a prestressed small box girder. Its structure is as follows Figure 1-4 As shown, it includes a plurality of semi-annular casings 2 arranged side by side in sequence, and a flat arch plate 1 is arranged between two adjacent semi-annular casings 2, and the arc openings of the flat arch plate 1 and the semi-annular casing 2 are opposite. , the arch surfaces of a plurality of flat arch plates 1 are jointly fixed with transverse support plates 4, the two ends of the transverse support plates 4 are fixedly connected with transverse connecting rods 5, and the other ends of the two transverse connecting rods 5 are respectively fixed on the first and last On a semi-annular casing 2, each flat arch plate 1 is provided with a cir...

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Abstract

The invention discloses a device for preventing inclined cracks of a web in an anchoring area at the end of a prestressed small box girder, which comprises a plurality of semicircular sleeves which are sequentially arranged in parallel, a flat arch plate is arranged between every two adjacent semicircular sleeves, and arc openings of the flat arch plates and the semicircular sleeves are opposite. A transverse supporting plate is jointly fixed to the arch faces of the multiple flat arch plates, transverse connecting rods are fixedly connected to the two ends of the transverse supporting plate, the other ends of the two transverse connecting rods are fixed to the first semi-annular sleeve and the last semi-annular sleeve respectively, and each flat arch plate is provided with a round hole channel corresponding to the stirrup. The device for preventing inclined cracks of the web in the end anchoring area of the small prestressed box girder can effectively prevent cracks of the web in the end anchoring area of the small prestressed box girder.

Description

technical field [0001] The invention belongs to the technical field of crack control devices in the anchorage area at the end of a prefabricated prestressed small box girder, and relates to a device for preventing oblique cracks in the web of the anchorage area at the end of a prestressed small box girder. Background technique [0002] Prestressed prefabricated small box girder, its structure includes top plate, bottom plate and web, and the main function of web is to bear shear stress and main tensile stress. In addition to longitudinal prestressed reinforcement, this type of main beam is also equipped with stirrups, erection reinforcement, longitudinal and horizontal distribution reinforcement and other structural reinforcement. Among them, the main function of stirrups is to improve the shear resistance of the main girder. The main function of erecting steel bars is to fix the stirrups and other steel bars to connect them into a steel skeleton. Prevent cracks due to temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/00E01D2/04E01D101/28
CPCE01D2/04E01D19/00E01D21/00E01D2101/28
Inventor 张兆宁李彦兴肖生彪李军君洪光
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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