A steel structure space system for reinforcement and its construction method

Abstract

The invention discloses a steel structure spatial system for reinforcement and a construction method thereof. The steel structure spatial system for reinforcement and the construction method thereof are mainly applied to building structure reinforcement and reconstruction in the technical field of building science. The steel structure spatial system for reinforcement structurally comprises steel plates; the steel plates comprise the floorslab top steel plates and the floorslab bottom steel plates; the floorslab top steel plates are located on the top surface of a concrete floorslab; the floorslab bottom steel plates are located on the bottom surface of the concrete floorslab; the floorslab top steel plates and the floorslab bottom steels plates are aligned in the longitudinal direction; the floorslab top steel plates and the floorslab bottom steels plates are fixedly arranged at the edges of an open hole position in the concrete floorslab so as to achieve reinforcement of the concrete floorslab; and rigid connecting devices for connecting the floorslab top steel plates with the floorslab bottom steels plates are disposed between the floorslab top steel plates and the floorslab bottom steels plates. According to the steel structure spatial system for reinforcement and the construction method thereof, the steel structure spatial system is combined with the concrete floorslab, thus the anchoring effect is good, and the bearing capacity and rigidity can be improved to the great degree; construction and mounting are convenient, and anchoring of the steel plates is achieved; and using space is not occupied, the steel consumption is small, and the cost is low.

Description

technical field [0001] The invention relates to the field of building science and technology, in particular to a steel structure space system for reinforcement and a construction method thereof, which are mainly used in the reinforcement and transformation of building structures. Background technique [0002] In the reinforcement and renovation project of concrete structure engineering, it is sometimes necessary to open holes in the concrete floor for considerations such as installation of equipment and addition of stairs. The opening of the floor slab destroys the integrity of the original slab and reduces the bearing capacity of the floor slab; while the installed equipment and stairs increase the load on the slab, reinforcement must be carried out to ensure the safety and applicability of the structure. [0003] In the national standard "Code for Design of Concrete Structures" GB50010-2010, for new projects, when openings are reserved on the concrete cast-in-place slab, r...

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Problems solved by technology

[0006] Among the existing strengthening methods, there is a strengthening method of pasting steel plates on the surface of the plate. In this method, the steel plates on the top and (or) bottom of the plate are deformed with the deformation of the plate and generate a certain tensile pressure to improve the bearing capacity of the plate. In the method, the steel plate only deforms depending on the deformation of the floor, and cannot form a relatively independent space system. It has little effect on the increase of the stiffness of the floor, and the degree of improving the bearing capacity is limited.

[0007] However, the method of enlarging the cross-section will inevitably sacrifice the use of space, and methods such as surface sticking will increase the stiffness of the floor slab less, and the increase in bearing capacity is limited.

[0008] There is a leak-proof device for roof reinforcement, which adopts roof leak-proof technology and fully utilizes clip-on flanges to reinforce the roof, so that the edge cut by the hole is converted from line contact to surface contact, which increases the contact area, thereby achieving the pressure resistance of the plate roof And the purpose of leak-proof; existing a kind of construction method of prestressed floor slab opening in the structural reinforcement project adds steel member support cushion inside the newly added opening, installs anchorage and stretches, and is used for prestressed tendons when prestressed floor slab is opened. The truncation and anchoring of the shear wall; in the prior art, angle steel is used for reinforcement and transformation for the opening of the shear wall, but the force of the shear wall is different from that of the floor, and the transformation method cannot solve the problem of damage caused by the opening of the hole. Stress concentration problems caused by both sides of the floor slab

[0009] None of the above existing technologies can strengthen the floor slab, increase its bearing capacity, and help eliminate prestress

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