Fabricated RC frame structure for arranging buckling-restrained braces (BRB) based on interlayer stiffness demands

A technology of anti-buckling bracing and frame structure, applied in the direction of earthquake resistance, building components, building structure, etc., to achieve the effect of reducing transmission, preventing occurrence and development, and preventing micro-cracks

Inactive Publication Date: 2019-06-11
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that most of the domestic multi-storey buildings have adopted the anti-buckling support structure, which can improve th

Method used

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  • Fabricated RC frame structure for arranging buckling-restrained braces (BRB) based on interlayer stiffness demands
  • Fabricated RC frame structure for arranging buckling-restrained braces (BRB) based on interlayer stiffness demands
  • Fabricated RC frame structure for arranging buckling-restrained braces (BRB) based on interlayer stiffness demands

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A prefabricated RC frame structure that needs to be equipped with anti-buckling supports based on interstory stiffness, such as figure 1 As shown, it includes the main structure 1 of the fabricated RC frame, the variable-section buckling-resistant support structure 2, and SMA shock isolators; among them, the variable-section buckling-resistant support structure is a BRB structure, and the cross-sectional size of the BRB core unit is based on the set target The inter-story stiffness depends; the SMA shock isolator includes SMA smart concrete 15 in the beam and column and the SMA rod-assembled self-resetting damper 3 used in the column foot.

[0054] The system integrates the concepts of anti-seismic, shock-absorbing, and shock-isolation, and the addition of anti-buckling braces with variable cross-sections improves the rigidity and overall stability of the structure, enabling uniform damage between layers, avoiding concentrated damage at the bottom layer, and overcoming t...

Embodiment 2

[0076] In the expected plastic hinge area of ​​beams and columns, ECC materials can also be used instead of SMA smart concrete. Using the characteristics of ECC materials for multi-slit steady-state cracking, it can better solve various defects caused by brittleness and weak tensile properties of traditional concrete, and achieve toughness. strengthen.

[0077] All the other are identical with embodiment 1.

Embodiment 3

[0079] The anti-buckling support structure and the main structure are connected by hinges.

[0080] All the other are identical with embodiment 1.

[0081] The present invention lays out the anti-buckling supports according to the requirement of determining the interstory stiffness, and can set the target interstory stiffness according to the actual needs, so that the RC frame has a consistent displacement between the floors, so that the structural system will not be damaged due to the bottom layer under the action of the earthquake. Large and resulting overall collapse. Use SMA intelligent concrete pouring in the expected plastic hinge area and beam-column ends and other vulnerable areas, and use ordinary concrete pouring in other areas, which can exert the self-resetting and self-repairing performance of SMA materials, inhibit the further development of cracks in the damaged area, and realize the self-healing of cracks . SMA dampers are used at the base of the column to re...

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Abstract

The invention relates to the field of structural engineering, in particular to a fabricated RC frame structure system for arranging buckling-restrained braces (BRB) based on interlayer stiffness demands. The fabricated RC frame structure system comprises a main body structure of a fabricated RC frame, a variable-section BRB structure, and an SMA vibration isolator, wherein the variable-section BRBstructure is the BRB structure, and the section size of a BRB inner core unit is determined according to the set target interlayer stiffness; the SMA vibration isolator comprises SMA intelligent concrete and an SMA bar fabricated self-reset damper adopted by a column base, wherein the SMA intelligent concrete is located in a beam and the column. According to the method for optimizing the interlayer stiffness, the interlayer stiffness of each layer is consistent by changing the size of the inner core section of the BRB; in addition, an SMA material is adopted in the area where the structure isprone to being damaged, thus the structure can self-reset and self-repair when being suffered from seismic action, and the damage forms of the 'strong beam and weak column' and 'the weak layer, especially the bottom layer becoming the weak layer' of the structure are avoided.

Description

technical field [0001] The invention relates to the field of structural engineering, in particular to an assembled RC frame structure system that requires anti-buckling supports to be laid out based on interlayer stiffness. Background technique [0002] As early as the beginning of the 20th century, prefabricated buildings have attracted widespread attention, and have begun to take shape under the attempts of countries such as Britain and France. And because of the advantages of fast construction of prefabricated buildings and low production costs, it has been rapidly promoted all over the world. In the past few decades, my country's construction industry has flourished, which has greatly promoted the growth of the national economy. At present, with the development of science and technology in our country and people's gradually increasing awareness of energy conservation and environmental protection, prefabricated buildings have received great attention. Prefabricated buil...

Claims

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Application Information

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IPC IPC(8): E04B1/19E04B1/98E04H9/02
Inventor 许卫晓程扬杨伟松于德湖张纪刚宁宁
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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