Multi-tube constraint concrete double-wall hollow column and production process

Abstract

The invention discloses a multi-tube constraint concrete double-wall hollow column which comprises vertical FRP (fiber reinforce plastic) outer pipe, a steel inner pipe is axially arranged at the center of the FRP outer pipe, a self-compacting concrete layer is poured between the inner peripheral surface of the FRP outer pipe and the outer peripheral surface of the steel inner pipe, a plurality of FRP inner pipe bodies are arranged between the inner peripheral surface of the FRP outer pipe and the outer peripheral surface of the steel inner pipe, the insides of FRP inner pipes are filled with concrete to form the FRP inner pipe bodies, and the FRP inner pipe bodies are circumferentially and uniformly distributed about the center of the steel inner pipe. The invention further provides a production process of the multi-tube constraint concrete double-wall hollow column. The multi-tube constraint concrete double-wall hollow column has the advantages of good ductility, high ultimate bearing capacity and the like, the production process of the hollow column is applicable to multi-tube constraint concrete double-wall hollow columns of various section forms such as circles and squares.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a multi-tube constrained concrete double-wall hollow column and a production process. Background technique [0002] Since the reform and opening up, my country's urbanization process has gradually accelerated, and more people have concentrated in cities. Therefore, urban land resources have become increasingly scarce. (Super) high-rise buildings and (super) long-span bridges have been built on a large scale. Today, the world's top 10 high-rise buildings There are 6 high-rise buildings in my country, and 7 of the 10 cable-stayed bridges with the largest spans in the world. [0003] With the increase of building height and bridge span, on the one hand, the self-weight of the building will increase. For example, more than 85% of the vertical load is the self-weight of the building, so the bearing capacity of the building is required to be further improved. On the other ha...

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Problems solved by technology

[0003] With the increase of building height and bridge span, on the one hand, the self-weight of the building will increase. For example, more than 85% of the vertical load is the self-weight of the building, so the bearing capacity of the building is required to be further improved. On the other hand, the increase of the self-weight of the building will increase the building cost.

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