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A frame beam column with enhanced shear bearing capacity and manufacturing method thereof

A technology for shear bearing capacity and frame beams, which is applied to building components, earthquake resistance, construction, etc., and can solve problems such as floor structure collapse, beam longitudinal reinforcement bond-slip damage, and reduction of shear bearing capacity in the core area of ​​nodes.

Active Publication Date: 2017-12-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, under the action of reciprocating loads, the bond-slip failure of the longitudinal reinforcement of the beam is prone to occur in the core area of ​​the joint, resulting in a decrease in the shear bearing capacity of the core area of ​​the joint.
The failure of joints may cause the frame structure to be difficult to repair, and even cause partial floors or the entire structure to collapse

Method used

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  • A frame beam column with enhanced shear bearing capacity and manufacturing method thereof
  • A frame beam column with enhanced shear bearing capacity and manufacturing method thereof
  • A frame beam column with enhanced shear bearing capacity and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Steel bars used:

[0019] The longitudinal reinforcement of frame beams and columns adopts 600MPa steel bars, of which the diameter of the longitudinal reinforcement of the frame beam is 18mm, the yield strength is 654MPa, and the tensile strength is 810MPa; the diameter of the longitudinal reinforcement of the frame column is 25mm, the yield strength is 622MPa, and the tensile strength is 793MPa.

[0020] Positioning stirrups, stirrups of frame beams and columns, and reinforcing bars are made of HRB400 steel bars, with a yield strength of 453MPa, a tensile strength of 616MPa, and a diameter of 10mm.

[0021] Selected concrete:

[0022] C60 grade concrete is selected, the standard compressive strength of conventional concrete cube is 63MPa, the axial tensile strength is 2.9MPa; the standard compressive strength of steel fiber concrete cube is 66.5MPa, the axial tensile strength of steel fiber concrete is 3.6MPa, steel fiber The length is 40mm, the aspect ratio of the ...

Embodiment 2-4

[0034] Embodiments 2-4 are basically the same as Embodiment 1, and the different parameters and material properties are shown in Table 1. The test results of Examples 2-4 are shown in Table 3.

[0035] Table 1 embodiment parameter and material property

[0036]

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PUM

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Abstract

The invention relates to a frame beam-column structure with enhanced shear bearing capacity and a manufacturing method thereof. The frame beam-column structure includes frame beams, frame columns and joints formed by their junctions, and is characterized in that the frame beam-column joints There are at least two sets of cross reinforcements parallel to each other within the area of ​​one effective beam height on the core area and the frame beam connected to the core area, and steel fiber reinforced concrete structures are poured within the range of cross reinforcements, and conventional concrete structures are poured in the rest of the area. , through the detection of shear bearing capacity, bearing capacity and ductility coefficient, it is proved that steel fiber reinforced concrete and cross ribs have a synergistic enhancement effect on the above properties.

Description

technical field [0001] The invention belongs to the field of reinforced concrete building structures, and relates to a frame beam-column structure with enhanced shear bearing capacity and a manufacturing method thereof. Background technique [0002] The multi-story reinforced concrete frame structure has been widely used in engineering because of its advantages of flexible space layout, light weight and good integrity. During the earthquakes at home and abroad in recent decades, frame structure failures have occurred frequently. For example, in the 1976 Tangshan earthquake, the seismic damage rate of reinforced concrete frame structures was lower than that of other structural types, and the seismic damage of cast-in-place frames was mainly concentrated in the joint area. (Special group of frame joints. Experimental study on the shear strength of the core area of ​​reinforced concrete frame beam-column joints under low-cycle repeated loads[J]. Journal of Building Structures,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/20E04B1/21E04B1/98
Inventor 戎贤张健新李艳艳刘平吴海超苏恒博杨春晖苏天姣
Owner HEBEI UNIV OF TECH