Buckling-restrained brace of combined hot-rolled angle steel

An angle steel and anti-pressure technology, which is applied in the direction of earthquake resistance, building components, building structures, etc., can solve problems such as the cross-sectional shape of steel cores

Inactive Publication Date: 2007-05-16
BEIJING UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

Use domestic hot-rolled angle steel for combination (Figure 3), and make anti-buckling support steel core through simple machining to solve the problem of steel core cross-section shape

Method used

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  • Buckling-restrained brace of combined hot-rolled angle steel
  • Buckling-restrained brace of combined hot-rolled angle steel
  • Buckling-restrained brace of combined hot-rolled angle steel

Examples

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Embodiment Construction

[0066] A four-story steel frame structure with a construction area of ​​about 5000m 2 , the height of the first floor is 4.8m, the standard floor height is 4.2m, and the total height of the structure is 17.4m. The laminated floor of profiled steel plate is adopted, and the live load of the floor is 2.5kN / m 2 . The seismic fortification intensity is 8 degrees, the basic seismic acceleration of the structure is 0.2g, and the site is class II. The design earthquake is grouped into the first group.

[0067] 1. Selection of steel frame structure and design and manufacture of combined hot-rolled angle steel anti-buckling support

[0068] 1) Type selection of the main steel frame structure and lateral stiffness of the anti-buckling support: determine the column grid size of the main frame structure according to the building function requirements, and determine the vertical load bearing capacity according to the "Code for Design of Steel Structures" (GB50017-2003) and vertical disp...

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Abstract

A combined pressure and bend defense support for hot rolling angle (BRAB) belongs to civil engineering energy dissipating and damping of vibration technology field. The prior international steel core which defend pressure and bend is made by low yield point steel, but the domestic steel products market can not bulk provide high grade low yield point steel and its products steel, and the cross-section shape is difficult to choosing, so it can not meet the engineering requirements. The invention prepares the steel core which cross-section shape meets the engineering requirements using the carbon structural hot-rolled angle which yield strength is 300-400MPa; the area of the cross-section of steel core work part Ac meets the requirement of 0.5Al<=Ac<=0.8Al, the length lc meets 0.4l<=lc<=0.7l; the structural gap thickness is 1.5-2.5 times of the lateral deformation when steel core yield after compressed. The pressure and bend-proof support dissipating energy of the combined hot-rolling angle is stable, it is not instable, the low-cycle fatigue resistance is fine, and it has excellent aseismic behavior to meeting the different requirements of engineering seismic design and increases the sidesway resistance stiffness.

Description

1. Technical field [0001] The combined hot-rolled angle steel anti-buckling brace (BRAB) belongs to the technical field of energy dissipation and shock absorption of civil engineering structures, and is mainly used in building structural engineering and civil structural engineering. 2. Background technology [0002] When it is necessary to increase the lateral stiffness of the structure, improve the seismic capacity of the structure, and improve the seismic performance of the structure, anti-buckling supports can be used and installed between important nodes of civil engineering structures (Figure 1). The anti-buckling support is generally composed of a steel core coated with surface isolation materials and with structural gaps, outsourcing steel pipes and connecting fittings. The gap between the steel core and outsourcing steel pipes is filled with cement mortar or concrete (Figure 1). The steel core only bears tension and pressure during work. The surface isolation materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/98E04B1/19
Inventor 高向宇张慧杜海燕梁峰
Owner BEIJING UNIV OF TECH
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