Four-bundle ultrahigh-performance concrete restrained common concrete rectangular column

Abstract

The invention discloses a four-bundle ultrahigh-performance concrete restrained common concrete rectangular column which comprises a rectangular-section concrete column body.A column body framework of the concrete column body comprises external covering plates and internal partitions, the external covering plates externally cover the column body, and an internal space of the column section is partitioned by the internal partitions.The external covering plates and the internal partitions of the column body framework are formed by pouring of UHPC (ultrahigh-performance concrete) to partition the rectangular section into four independent bundled rectangular units identical in size to form four bundled independent sub-columns, and each sub-column internally allows pouring of normal-strength concrete and allocation of reinforcement cage frameworks according to structural demands.By taking full advantage of a self-restrain function of concrete, an external covering restrain function of steels to the concrete is substituted, and accordingly the steels are saved while manufacturing cost is reduced.On the basis of excellent compactibility and pouring availability and high strength of the UHPC, bearing capacity and durability of the concrete column can be remarkably improved due to the quartered section.In addition, the four-bundle ultrahigh-performance concrete restrained common concrete rectangular column has the advantages of structural simplicity, material novelty, superior performances, adaptability to building industrial production and the like.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a four-beam ultra-high-performance concrete bound ordinary concrete rectangular column. Background technique [0002] Reinforced concrete structural column, as a large-scale and wide-ranging vertical load-bearing member, plays an important role in various construction projects and bridge projects. However, in the face of the rapid development of the economic demand, the situation of regionalization of population concentration and urban land shortage is common in the world, which puts forward more stringent requirements for urban planners and builders, that is, how to improve the human population in a limited living environment. quality of life and keep up with the pace of urban development. Therefore, important lifeline projects such as high-rise and super high-rise buildings and heavy-duty bridges have emerged, which will inevitably have a huge impa...

AI Technical Summary

Problems solved by technology

Although high-strength concrete can improve the bearing capacity of the column itself, the brittleness of high-strength concrete is very unfavorable to the seismic performance of structural columns.

Of course, the built-in section steel can make up for the lack of high-strength concrete in this respect. However, another significant problem will follow, that is, the arrangement of more section steel in the column will make the concrete pouring very difficult during the construction stage, and the quality of the concrete pouring cannot be guaranteed.

Obviously, the use of confined concrete technology can better avoid the occurrence of the above phenomenon. The steel tube concrete column inherits the advantages of steel structure and concrete structure, but it is not economical in terms of the amount of steel used, and the steel tube and concrete are prone to sticking and detachment and other phenomena, which can weaken the binding effect of the steel pipe on the concrete, and the combined effect becomes worse

Although corresponding structural measures (such as setting stiffeners and tie rods) have also been proposed to improve the performance of CFST columns, these measures will cause greater damage to the steel tubes, and the processing costs will also increase significantly

In addition, the outsourced steel pipes are also extremely cumbersome in the post-corrosion and fire prevention treatment of the steel tube concrete columns. If not handled properly, it will be very detrimental to the durability and fire performance of the structure

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