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A rpc (reactive Powder Concrete)-ordinary concrete composite section structure

A common concrete and composite cross-section technology, applied in the field of RPC (Reactive Powder Concrete)-ordinary concrete composite cross-section structure, can solve problems such as few, temporary but not permanent, and inconspicuous actual effects, and achieve reduced creep deformation and high Compressive strength properties, effects evident from the distribution

Active Publication Date: 2016-08-31
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experts and scholars at home and abroad have carried out a large number of experimental and theoretical studies on the deflection of long-span PC box girder bridges, but there are not many measures that can effectively control them in engineering practice. obvious

Method used

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  • A rpc (reactive Powder Concrete)-ordinary concrete composite section structure
  • A rpc (reactive Powder Concrete)-ordinary concrete composite section structure
  • A rpc (reactive Powder Concrete)-ordinary concrete composite section structure

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Experimental program
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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] Such as Figure 1~Figure 3 As shown, the present invention mainly relates to cast-in-place ordinary concrete box girder bottom plate (1), cast-in-place ordinary concrete box girder top plate (9), prefabricated RPC columns 1-7 (2-8), and steel bar shear keys (10). During the construction of the actual bridge, prefabricated RPC columns 1~7 (2~8) first; before casting the No. 0 block of the box girder bridge, put the prefabricated RPC column 1 (2) in the formwork; pass between concrete and precast RPC columns 1 (2) image 3 The steel bar shear key (10) in the bridge is connected; before the No. 1 cast-in-place block, the prefabricated RPC column 1 (2) and the prefabricated RPC column 2 (3) are connected by glue; after that, the No. 1 block of the cast-in-place box girder bridge. Similarly, block No. 2~1 / 3n of the box girder bridge (n is the number of ca...

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Abstract

The invention relates to the technology of adding prefabricated RPC (Reactive Powder Concrete) columns to reduce the long-term deflection of long-term PC rigid frame bridges, including the longitudinal arrangement of prefabricated RPC columns 1-7 (2-8), the prefabricated RPC columns 1-7 (2-8) 8) Connection with ordinary concrete (9) in the same segment, and connection between segments 1-7 (2-8) of prefabricated RPC columns. The invention can effectively reduce the long-term creep deflection of the long-span rigid frame bridge, has the advantages of convenient construction, easy realization and low cost, and can be widely used in the actual design of the rigid frame bridge.

Description

technical field [0001] The invention relates to the technology of adding prefabricated RPC (Reactive Powder Concrete) columns to reduce the long-term deflection of long-span PC box girder bridges, including the longitudinal arrangement of prefabricated RPC columns, the connection of prefabricated RPC columns and ordinary concrete in the same segment, and the prefabricated RPC column segments connection between. Background technique [0002] The long-span PC box girder bridge has the characteristics of strong spanning capacity, simple construction, good economy, and smooth driving, and has become the main bridge type in the world with a span range of 100m to 300m. However, after the operation of long-span PC box girder bridges, there is a common problem of mid-span deflection. The deflection exceeding the design permit poses a great threat to the durability of the structure and operational safety, which has not been solved so far. It can be said that the deflection problem h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D2/04E01D101/24
CPCE01D2/04E01D2101/24
Inventor 张阳鲍超刘榕唐重玺李少波陈彦羽刘海波
Owner HUNAN UNIV
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