Assembly type frame-core tube structural system adopting all-steel-encased stress component

Abstract

The invention discloses an assembly type frame-core tube structural system adopting an all-steel-encased stress component. A core tube shear wall is a steel box concrete shear wall, a frame column is a steel pipe concrete column, and a frame beam connected between the embedded column position of the steel box concrete shear wall and the steel pipe concrete column is a steel-concrete combined beam which can coordinate a peripheral frame and a core tube of the assembly type frame-core tube structural system to bear earthquake force together. A steel-encased box of the steel box concrete shear wall is formed by assembling multiple sections of finished steel boxes on site, and every two adjacent sections of finished steel boxes are connected through multiple son buckle connecting pieces welded to the first section of finished steel box and mother buckle connecting pieces welded to the second section of finished steel box. The flatness of the steel box concrete shear wall in the large-length core tube can be ensured, and it can be ensured that the strength and shear capacity of the steel box concrete shear wall met construction standard requirements.

Description

technical field [0001] The invention relates to an assembled frame-core tube structure system adopting all-clad steel stress components. Background technique [0002] On January 1, 2013, the General Office of the State Council clearly stated in Guobanfa [2013] No. 1 "Green Building Action Plan": to promote the industrialization of construction, promote the construction systems such as steel structures suitable for industrial production, and accelerate the development of prefabrication of construction projects and assembly technology, improve the integration level of construction industrialization technology, and propose to complete 1 billion square meters of new green buildings during the "Twelfth Five-Year Plan" period; by the end of 2015, 20% of new urban buildings will meet the requirements of green building standards. [0003] In the traditional frame-core tube structure, regardless of the reinforced concrete frame-reinforced concrete core tube, steel frame-reinforced co...

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Problems solved by technology

[0006] First, in the frame-core tube structure system, the frame beams connected between the core tube shear walls and frame columns have a large span and need to coordinate the peripheral frame and the core tube to jointly bear the earthquake force, while the existing U-shaped steel beams It is only used in some parts, and it is only used as an ordinary simply supported beam to bear the vertical load. Because there is no cover plate on the upper part, its bending capacity is weak, and it cannot transmit the bending moment of the support. The existing box-shaped steel beam has no concrete to provide stiffness. However, it cannot meet the deflection requirements of flexural members in the long-span area. Therefore, the existing U-shaped steel beams and box-shaped steel beams cannot coordinate the peripheral frame and the core tube to jointly bear the seismic force, and they are used as long-span frame beams. Easily deformed during hoisting

[0007] Second, the reason why the existing frame-core tube structure system uses reinforced concrete core tube is that the core tube length of the frame-core tube structure system is large, and when the existing steel box shear wall is installed in sections, Two adjacent steel plate walls are connected by welding, which will form a welded joint with the same height as the steel box shear wall. However, due to the limitations of the welding environment on site, it is difficult to guarantee the verticality and flatness of the steel box shear wall, and the steel box shear wall The box shear wall is easily deformed by the external force of welding, and the flatness error and deformation error seriously affect the quality of the core tube under the accumulation of the long-length core tube, which cannot meet the requirements of the building code

[0008] Third, the fire protection measures of steel structures are usually spraying fireproof coatings on the surface of components. The coating has matching (compatibility), and its effect is related to construction conditions (such as humidity), surface cleanliness of steel components, and process control of coating process. are closely related, require high construction technology, relatively slow construction speed, and require multiple multi-layer spraying; when the fire resistance level is high, the coating thickness is large, which is affected by various factors during the use process, such as large deformation of components, steel plate surface Large side lengths, etc., will cause cracking and peeling of the rigid coating, and high maintenance requirements and maintenance costs in the later period

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