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High-ductility fiber concrete short column

A fiber reinforced concrete, high ductility technology, applied in the field of short columns, can solve the problems of poor ductility of ordinary reinforced concrete, structural damage and collapse of short columns, etc. Effect

Active Publication Date: 2015-04-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pouring material of the existing short columns is ordinary concrete, but due to the poor ductility of ordinary reinforced concrete, when the building is subjected to earthquakes, the short columns are prone to shear brittle failure, resulting in serious damage or even collapse of the structure, which is difficult to meet the "medium Earthquake can be repaired, big earthquake will not collapse" design criteria

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The short column in this embodiment is a frame column with a column-shear-span ratio of less than 2 in the stairwell of a teaching building. The building floor height is 3.6m. The rest platform is located at half the floor height. The column support length is 1.8m, and the cross-sectional size is 500×500mm. The longitudinal reinforcement of the short column is HRB400, with a diameter of 20mm, a total of 8 pieces, which are evenly arranged along the periphery of the section; the stirrups are HPB300, with a diameter of 10mm and a spacing of 100mm; The stub of this example was built.

[0014] Following the technical solution of the present invention, the components of the high ductility fiber concrete of this embodiment are cement, fly ash, silica fume, sand, PVA fiber and water, wherein, by mass percentage, cement: fly ash: silica fume : sand: water = 1: 0.9: 0.1: 0.76: 0.58; based on the total volume of cement, fly ash, silica fume, sand and water mixed uniformly, the vo...

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PUM

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Abstract

The invention discloses a high-ductility fiber concrete short column. The problems that a prior short column is easy to shear and damage and poor in ductility and anti-shock capability are solved. The short column is formed through pouring of high-ductility fiber concrete and the high-ductility fiber concrete comprises cement, fly ash, silica fume, sand, polyvinyl acetate (PVA) fiber and water. The short column is high in bearing capability, good in ductility and anti-shock capability and capable of improving energy dissipation of the whole structure. The short column cannot be subjected to brittle failure easily.

Description

technical field [0001] The invention relates to a short column in a building structure, in particular to a short column poured with high ductility fiber concrete material. Background technique [0002] The column is the main force-bearing member in the building structure, which supports the load from the superstructure and transmits it to the foundation. In the case of a certain ground floor height of the building, as the number of upper floors increases, the axial force of the bottom column increases, and the reduction of the axial compression ratio in order to improve the ductility will lead to a further increase in the section size of the column, which will reduce the shear-span ratio of the bottom column. Small, thus forming a short column with a shear-span ratio of less than 2. In addition, short columns will inevitably appear in the design due to the large load and low floor height of library stacks, storage rooms with low storeys, underground garages and stairwells i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
Inventor 邓明科梁兴文代洁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY