CN103216037B - The Z-shaped steel reinforced concrete special-shaped columns of supporting role's steel frame - Google Patents

Abstract

The invention discloses a Z-shaped steel concrete special-shaped column equipped with an angle steel skeleton, including a Z-shaped concrete special-shaped column, and profile steel is arranged in the Z-shaped concrete special-shaped column, and the profile steel is connected by the angle steel through steel accessories to form a Z-shaped lattice space angle steel skeleton . The invention solves the difficulty of pouring the Z-shaped steel concrete special-shaped column with solid web steel end plate at the end of the column limb along the width direction of the limb and the inconvenience of wearing steel (reinforcement) in the joint area of the beam and column; through reasonable angle steel and steel accessories The configuration can restrain the lateral deformation of the concrete inside and enhance the bond between steel and concrete, thereby improving the bearing capacity of the column itself and expanding the application range of the special-shaped column structure.

Description

Z-shaped steel concrete special-shaped column with angle steel skeleton

technical field

The invention relates to a combined structure of steel and concrete, in particular to a Z-shaped special-shaped steel concrete column with an angle steel skeleton.

Background technique

Modern civilization has led to a change in people's aesthetic concepts of things. As a vertical load-bearing member in a frame structure—column, its traditional form is a rectangular cross section. The special-shaped column structure has the characteristics of the same thickness as the infill wall, so it avoids the column flute protruding from the wall, increases the actual usable area of the room, and improves the "household rate", which is favored by owners and users. With the continuous development of commercial buildings such as residences and offices towards high-rise and super-high-rise buildings, the width of the column limbs of the special-shaped column structure is bound to increase. Promotional use. Our country has a vast territory, most of which are located in earthquake zones, and strong earthquakes are very likely to occur. Compared with traditional reinforced concrete (RC) rectangular columns, the seismic capacity of reinforced concrete special-shaped columns is weakened due to the irregular cross-section, so how to improve the seismic performance of special-shaped column structures is also a major issue.

In order to meet the requirements of structural bearing capacity and seismic performance, steel and concrete composite structures have received more and more attention in the industry because they take into account the above two factors. Steel reinforced concrete (SRC) composite structure, as a type of steel and concrete composite structure, not only has the common advantages of composite structures, that is, high bearing capacity and good seismic performance; The durability and fire resistance of the internal steel are improved. The research shows that: due to the configuration of more steel in the cross-section of the steel concrete special-shaped column, the steel content is greatly increased, so that the load-bearing capacity and seismic index are both stronger than the RC special-shaped column.

In actual engineering, there are offsets of the column network axes of some frame structures (such as at the corner of the balcony), which lead to changes in the shape of the column section, mostly in the form of a Z-shaped section. Due to the particularity of its location, this type of Z-shaped special-shaped column is very likely to be subjected to torque, so its stress is more complicated than that of columns located in other positions of the frame structure. For the Z-shaped steel concrete special-shaped column, the cross-section steel is mainly configured in the form of solid web steel, T-shaped steel, channel steel, etc. After removing the concrete protective layer of the profiled steel, along the width direction of the column, they are arranged on each column limb The end exists in the form of a solid abdomen. However, considering factors such as the ratio of section steel and the thickness of the infill wall, the thickness of the steel cover of the special-shaped steel concrete column has a certain limit, and some even can only meet the minimum cover thickness, which leads to the distance between the outer edge of the column and the outer surface of the steel. The space between them is relatively narrow. During construction, it is very easy to produce coarse aggregate in the concrete, which is difficult to drop due to the slightly larger particle size of the aggregate, and difficult to vibrate. As a result, the concrete pouring of the protective layer is not dense, which affects the structural column itself. Moreover, at the staggered part of the beam-column joint area, the longitudinally stressed steel bar in the beam is difficult to penetrate into the core area of the joint due to the blockage of the solid web steel in the column, which is most likely caused by improper anchorage measures at the beam end. The force transmission of the nodes fails, and the consequences are extremely serious.

Based on the difficulties in the construction of the existing steel distribution form and the inconvenience of passing steel (reinforcement) in the beam-column joint area, there is an urgent need for a steel distribution form that can not only meet the steel distribution ratio requirements, but also facilitate construction and node anchorage. Z-shaped steel concrete special-shaped column.

Contents of the invention

The technical problem to be solved by the present invention is to provide a Z-shaped special-shaped steel concrete column with an angle steel skeleton, which is easy to construct and pour, high in bearing capacity and strong in anchorage.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: the Z-shaped steel concrete special-shaped column with angle steel skeleton includes Z-shaped concrete special-shaped column, and the Z-shaped concrete special-shaped column is equipped with section steel, and the section steel is connected by angle steel through steel accessories to form Z Shaped lattice structure space angle steel skeleton.

The Z-shaped concrete special-shaped column is a structural column whose column network is not on the same straight line in the special-shaped column frame structure. .

The section steel is connected by vertical angle steels through steel accessories to form a four-sided hollowed out Z-shaped lattice space angle steel skeleton. The vertical angle steels are respectively arranged at the corners of the space steel skeleton (Z-shaped concrete special-shaped column section).

In the above-mentioned Z-shaped steel concrete special-shaped column with angle steel skeleton, the angle steel is connected with each other at a certain distance (called the distance) through steel accessories, and is generally connected by welding. In the actual structure, the angle steel can be realized in two ways. The interconnection with the steel accessories can be connected horizontally or horizontally and cross diagonally. details as follows:

All the steel accessories are welded on the angle steel in the form of horizontal and horizontal, and a certain distance is set between the steel accessories along the vertical direction. The construction of this connection method is simple and clear.

The steel accessories are welded on the angle steel in the form of horizontal, horizontal and cross oblique directions. A certain distance is set between the steel accessories along the vertical direction. The accessories are connected end to end, and the left and right oblique steel accessories are connected end to end. This connection method is conducive to the improvement of the shear bearing capacity of Z-shaped special-shaped columns.

Aiming at the deficiencies in the existing Z-shaped concrete special-shaped columns, the inventor designed the Z-shaped steel concrete special-shaped columns with angle steel skeletons of the present invention. The mutual bonding between steel and concrete is realized, and the real combination of the two is realized; reasonable spacing between steel parts is maintained, which overcomes the problem that the aggregate is difficult to fill the narrow and small steel protective layer area during concrete pouring, and facilitates the construction process; The Z-shaped space angle steel skeleton cage can restrain the lateral deformation of the concrete inside and improve the bearing capacity of the column itself. It is also conducive to the penetration of the steel bar or section steel in the beam in the joint area of the frame into the inside of the column limb of the special-shaped column to enhance the anchoring effect of the joint.

Description of drawings

Fig. 1 is a schematic diagram of the space of the combined components of the first embodiment (horizontal and transverse welded steel accessories) of the Z-shaped steel concrete special-shaped column with angle steel skeleton in the present invention.

Fig. 2 is a schematic diagram of the space of the combined parts of the second embodiment of the Z-shaped steel concrete special-shaped column with angle steel skeleton (horizontal transverse and cross oblique welded steel fittings) of the present invention.

In the picture: 1 angle steel 1, 2 angle steel 2, 3 angle steel 3, 4 angle steel 4, 5 angle steel 5, 6 angle steel 6, 7 angle steel 7, 8 angle steel 8, 9 Z-shaped concrete special-shaped column, 10 horizontal horizontal steel accessories, 11 cross Diagonal steel trim.

detailed description

Fig. 1 shows the first embodiment of the Z-shaped steel concrete special-shaped column with angle steel skeleton in the present invention, and the erection of the lattice angle steel skeleton is formed by welding all horizontal and transverse steel accessories. Among them, angle steel one 1, angle steel two 2, angle steel four 4, angle steel five 5, angle steel six 6, and angle steel eight 8 are located at the end of each column limb of a special-shaped column with a Z-shaped cross-section, and are set with the back of the angle steel limb facing outward. The vertical distance between the surface and the outer surface of the special-shaped column limb is the thickness of the angle steel concrete protective layer; angle steel three 3 and angle steel seven 7 are located at the intersection of each column limb of the special-shaped column with a Z-shaped section and the section web, just at the corner of the section The part is set with the back of the limb facing inward. This part is the complex stress area of the special-shaped column. Therefore, setting the angle steel here can not only stabilize the connection of the entire angle steel frame, but also strengthen its weak link and enhance its mechanical performance. When connecting each angle steel, firstly, the horizontal transverse steel trim piece 10 is welded to the limb back (limb belly) of the angle steel at a certain pitch. If the columns are located at the bottom of the frame structure, due to the large load on the upper part, it is necessary to meet the bearing capacity requirements of the Z-shaped steel concrete special-shaped columns, and the inner core concrete can be strengthened by appropriately reducing the distance between the horizontal accessories. The restraining effect of the frame structure improves the bearing capacity of the column; if the column is located on the upper few floors of the frame structure, due to the small load, the distance between the horizontal accessories can be appropriately increased to meet the required bearing capacity, which can save part of the steel . The production method of the first embodiment is as follows:

1) Connect angle steel one, angle steel two, angle steel three, angle steel four, angle steel five, angle steel six, angle steel seven and angle steel eight vertically with a certain distance between steel accessories by horizontal welding;

2) Weld angle steel two, angle steel three, angle steel four, angle steel five, angle steel six, angle steel seven, angle steel eight and angle steel one by horizontal welding in the same way as above;

3) Embed the formed lattice-type space angle steel skeleton into the formwork of the Z-shaped concrete special-shaped column 9, and pour concrete from it.

Fig. 2 shows the second embodiment of the Z-shaped steel concrete special-shaped column with angle steel frame in the present invention. The erection of the lattice-type angle steel frame is welded by horizontal and cross-slanted steel accessories. Among them, the setting of angle steel 1 to angle steel 8 is the same as that of the first embodiment, only when connecting each angle steel, firstly, the horizontal horizontal steel trim 10 is welded to the back of the angle steel (limb abdomen) with a certain distance, and then An intersecting oblique steel embellishment 11 is welded between two adjacent horizontal embellishments, and the upper and lower oblique steel embellishments are connected end to end, and the left and right oblique steel embellishments are connected end to end or end to end, so as to resist shear deformation. The pitch adjustment is also the same as the above-mentioned embodiment. The production method of the second embodiment is basically the same as before, only the following operation is added between steps 2) and 3): add a crossed oblique steel ornament 11 between each horizontal transverse steel ornament 10, its The welding is carried out in the form of connecting the upper and lower oblique steel trims end to end, and the left and right oblique steel trims are connected end to end or end to end.

The above-mentioned welds can refer to the corresponding specifications to connect the steel accessories and angle steels by means of fillet welds, and fully weld all the overlapping parts of the two to ensure the effectiveness of the connection.

To sum up, the present invention uses a space lattice type Z-shaped angle steel frame, which has the following advantages compared with the prior art:

1) Improve the convenience of concrete pouring during construction, facilitate the flow of aggregate and mortar in the concrete in the Z-shaped concrete special-shaped column section, and facilitate the distribution of concrete aggregate in the protective layer area of the Z-shaped steel concrete special-shaped column, making Concrete pouring of section steel protective layer is compacted to improve its durability;

2) The end of the Z-shaped concrete special-shaped column is configured with lattice-shaped angle steel, which can facilitate the penetration of steel bars or profiled steel in the beam in the node area in the Z-shaped steel concrete special-shaped column, strengthen the anchoring effect, and strengthen the beam-column joint The joint work can effectively enhance the shear bearing capacity of the node area composed of Z-shaped steel concrete special-shaped columns and beams;

3) It can restrain the concrete in the steel skeleton, reduce its lateral deformation, and improve the pressure bearing capacity of the Z-shaped steel concrete special-shaped column;

4) The bonding effect between steel and concrete can be enhanced to a certain extent, and the purpose of truly combining steel and concrete can be achieved.

Claims (1)

1. a Z-shaped steel reinforced concrete special-shaped columns for supporting role's steel frame, comprises Z-shaped concrete profiled pile, it is characterized in that: configuration shaped steel in described Z-shaped concrete profiled pile, and shaped steel is sewed part by angle steel by steel and is connected to become Z-shaped lattice dimensional angle iron framework; Described Z-shaped concrete profiled pile is Framed Structure with Special-Shaped Columns center pillar net is not collinear structural column; Described shaped steel sews by steel the Z-shaped lattice dimensional angle iron framework that part is interconnected to form four sides hollow out by vertical angle steel, and vertical angle steel is separately positioned on each corner of Steel Space skeleton; Described steel sew part with horizontal cross hold concurrently intersect oblique form be welded on angle steel, vertically each steel is sewed between part and is arranged a determining deviation, in spacing, part sewed by oblique welding one steel, and up and down oblique steel is sewed part and joined end to end, and left and right oblique steel is sewed the first or tail tail of part and is connected.