CN204983213U - Dark big board shear wall structure that supports in prefabricated assembled area - Google Patents

Abstract

A prefabricated large slab shear wall structure with concealed supports, comprising upper and lower prefabricated reinforced concrete slabs with concealed supports and cast-in-place concrete; Notches, distributed steel bars, lattice steel bars, hidden column longitudinal bars and stirrups, square steel pipes, X-shaped steel diagonal braces, and ring-shaped reinforcement bars; The diagonal bracing is welded into a steel skeleton through L angle steel, which is jointly stressed with the steel mesh and concrete; the top of the square steel pipe has a stiffener and extends into the upper square steel pipe for a certain distance; Ring-shaped reinforcing ribs; the four-corner notches are indirectly overlapped by connecting steel bars and notched steel bars, and the central groove-shaped notch area is indirectly overlapped by inserting connecting steel bars into ring-shaped reinforcing bars; the vertical connection of the structure is more reliable, and the integrity is better. The bearing capacity is greatly improved and there are obvious multiple anti-seismic defense lines.

Description

A prefabricated large-slab shear wall structure with concealed support

technical field

The utility model belongs to the field of prefabricated building structures, and relates to prefabricated building structures, mainly to a prefabricated large-slab shear wall structure system, in particular to a prefabricated assembly type large-slab shear wall structure with hidden support and a construction method for its upper and lower connection nodes.

Background technique

The prefabricated structure is assembled and connected by prefabricated concrete components or parts, which meets the needs of the development of construction industrialization and housing industrialization. It has many advantages such as fast construction speed, high manufacturing precision, environmental protection and sustainability. The application is very extensive; domestic research is currently mainly concentrated in the field of prefabricated frame structures, and research on the seismic performance of prefabricated assembly shear wall structures is rare; the key to ensuring the seismic performance of prefabricated assembly structures is mainly reflected in structural measures such as node connections The design and other aspects of the traditional prefabricated shear wall structure mainly include: steel sleeve connection (including shear key), local unbonded steel sleeve connection, angle steel weld connection, steel bar and steel pipe bolt connection and Prestressed connection, etc.; existing experimental studies have shown that the seismic performance of prefabricated walls under these connection methods is relatively good, but they are still indirect connections after all. Compared with the overall cast-in-place shear wall structure, the joint connection is still weak and other shortcomings.

As the height of the traditional prefabricated shear wall increases, its thickness will also increase, resulting in an increase in the self-weight of the prefabricated shear wall, which is not conducive to transportation and hoisting, and has a negative effect on improving the bearing capacity of the structure and earthquake The ductility under the action is also relatively unfavorable; moreover, the traditional prefabricated shear wall structure does not have hidden columns and side columns, and the anti-seismic defense line is single.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model proposes a prefabricated assembly type large slab shear wall structure with hidden support; this kind of large slab shear wall is assembled on site by upper and lower prefabricated reinforced concrete slabs with hidden support It is made of post-casting necessary concrete; this kind of prefabricated reinforced concrete slab with hidden support is composed of prefabricated reinforced concrete wall panels, four corner notches, reserved notches, horizontally distributed steel bars in the wall panels, vertically distributed steel bars, lattice steel bars, hidden Column longitudinal reinforcement, concealed column stirrup, concealed column square steel pipe, X-shaped steel diagonal brace, and ring-shaped reinforcement; this kind of prefabricated reinforced concrete slab with concealed support contains concealed columns, and the core of concealed columns contains square steel pipes and square steel pipes It is welded and connected with the X-shaped steel diagonal brace inside the wall panel, and the square steel pipe and the X-shaped steel diagonal brace form a steel skeleton, which is jointly stressed with the steel mesh and concrete; obviously, this kind of steel skeleton can not only improve the performance of prefabricated large-slab shear walls. To reduce the thickness of this prefabricated component, it can be used in high-rise structures to effectively reduce the structural weight. At the same time, the setting of this kind of steel skeleton makes the prefabricated large-slab shear wall with only a single anti-seismic defense line. Multiple anti-seismic defense lines; in addition, the setting of four-corner notches and reserved notches and the setting of ring-shaped reinforcing ribs can effectively ensure the integrity of the connection nodes of the upper and lower prefabricated large-slab shear walls and ensure reliable connection; it can be seen that this prefabricated assembly The large slab shear wall with concealed support has a large bearing capacity and reliable joint connection, and can achieve ideal ductile failure under earthquake action.

The utility model is realized through the following technical solutions:

A prefabricated large slab shear wall structure with concealed supports, comprising upper and lower prefabricated reinforced concrete slabs with concealed supports and cast-in-place concrete;

The reinforced concrete slab with hidden support includes prefabricated wall panels, four-corner notches, reserved notches, distributed steel bars, lattice steel bars, hidden column longitudinal bars and stirrups, square steel pipes, X-shaped steel diagonal braces, and ring-shaped reinforcing bars. ;

The square steel pipe with hidden support reinforced concrete large slab concealed column and X-shaped steel diagonal brace are welded by L angle steel to form a steel skeleton, which is jointly stressed with the steel mesh and concrete;

The top of the square steel pipe has a stiffener and extends into the upper square steel pipe for a certain distance;

There are notched steel bars in the four-corner notches, and ring-shaped reinforcing ribs in the central groove-shaped notch area;

The four-corner gaps are indirectly overlapped through the connecting steel bars and the notched steel bars, and the central groove-shaped gap area is indirectly overlapped through the connecting steel bars inserted into the ring-shaped reinforcing ribs.

Compared with the cast-in-place reinforced concrete shear wall structure, most of the components of the utility model are prefabricated in the factory, and then a small amount of necessary concrete is poured after assembly on site. The factory has high production efficiency, and can ensure the manufacturing accuracy and quality, and is green and environmentally friendly; Compared with the existing prefabricated assembled structure, especially compared with the existing prefabricated assembled large slab shear wall structure, the prefabricated assembled large slab shear wall structure with hidden support of the utility model has more vertical node connections at the upper and lower sides. In order to be reliable, the integrity is better, and the formation of the steel skeleton greatly improves the bearing capacity, effectively thins the thickness of the shear wall, and at the same time has obvious multiple anti-seismic defense lines, and can perform well under the action of earthquakes.

Description of drawings

Fig. 1 is a schematic diagram of the axial side of the utility model after the upper prefabricated wallboard is positioned and bound with the necessary steel bars and the upper and lower steel pipes are welded.

Fig. 2 is a schematic diagram of the front elevation of a piece of prefabricated and assembled large-slab shear wall with hidden support of the utility model.

Fig. 3 is a schematic cross-sectional view of 1-1 and 2-2 in Fig. 2 .

Fig. 4 is a schematic diagram of connection of upper and lower nodes in the middle groove area of the prefabricated large-slab shear wall with hidden support of the utility model.

Fig. 5 is an axial schematic diagram of a piece of prefabricated assembled reinforced concrete wall panel with hidden support of the utility model.

Fig. 6 is a schematic diagram of the welding connection between the steel pipe of the present invention and the X-shaped steel diagonal bracing node.

Fig. 7 is a schematic diagram of the axial side of a prefabricated large-slab shear wall with poured connection nodes of the utility model.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described:

A prefabricated large slab shear wall with concealed support, including setting a reinforced concrete slab with concealed support, and cast-in-place concrete 17;

The reinforced concrete slab with concealed support has built-in X-shaped steel diagonal braces 9 with shear nails 10 steel plates;

For the reinforced concrete slab with hidden support, concealed columns are arranged on both sides of the slab, and square steel pipes 13 are arranged at the core of the concealed column;

For the reinforced concrete slab with hidden support, the slab is provided with four-corner gaps 16, reserving horizontally distributed reinforcing bars 2 and vertically distributed reinforcing bars 1;

The top of the square steel pipe 13 is internally welded with a stiffener 14, and the stiffener 14 protrudes from the lower prefabricated slab wall and extends into the upper prefabricated slab wall for a certain distance;

For the reinforced concrete slab with concealed support, groove-shaped notches 5 are reserved in the middle regions of the upper and lower ends, and lattice steel bars 6 and 7 are arranged in the groove-shaped notches 5;

The lattice steel bars 6, 7 play the role of tie-in prefabricated wall pieces 4 on both sides of the notch 5;

The prefabricated large slab wall with hidden support is indirectly overlapped at the gap 16 through the gap steel bar 1 and the connecting steel bar 3, and the middle groove-shaped gap 5 area is indirectly overlapped through the connecting steel bar 3 and the pre-embedded annular reinforcing bar 8 ;

For the reinforced concrete slab with hidden support, its X-shaped steel diagonal brace 9 and the hidden column middle steel pipe 13 are welded with L angle steel 15;

Step 1: Prefabricate a prefabricated large slab with concealed support in the factory, with gaps 16 at the four corners of the large slab, and reserve groove-shaped gaps 5 in the middle of the upper and lower ends, and set lattice steel bars 6 and 7 in the groove-shaped gaps 5, First, prefabricate X-shaped steel diagonal braces 9 with shear nails 10 steel plates and square steel pipes 13 welded with stiffeners 14, then bind horizontal steel bars 2 and vertical steel bars 1, lattice steel bars 6, 7 and hidden column longitudinal bars 11 Make reinforcement cage with concealed column stirrup 12, then insert X-shaped steel diagonal brace 9 and square steel pipe 13 and weld the nodes of X-shaped steel diagonal brace 9 and square steel pipe 13 with L angle steel, square steel pipe 13 does not pour concrete during prefabrication, After the steel bars and steel skeleton are manufactured, the formwork is set up, the necessary gaps are reserved, and the concrete is poured to form a prefabricated assembled reinforced concrete wall panel with hidden support.

Step 2: After the prefabricated prefabricated slab with hidden support that has been prefabricated in the factory and reached the design strength is transported to the site for installation, positioning and temporary fixation, insert the lower stiffener 14 into the square steel pipe 13 at the gap 16 at the left and right corners , and welded up and down, the connecting steel bars 3 at the left and right corner notches 16 and the notched steel bars 1 at the left and right corner notches 16 are indirectly overlapped, and the connecting steel bars 3 in the middle groove-shaped notch 5 area are inserted into the pre-embedded annular reinforcing bars 8 Inside.

Step 3: Set up the formwork at the left and right corner gaps 16, and then pour micro-expansion type self-flowing compact concrete 17 into the left and right corner gaps 16 and square steel pipes 13. This kind of concrete can improve the connection performance of the old and new concrete interfaces. 17 After the maintenance is completed, the fabrication of the prefabricated large-slab shear wall unit with hidden support is completed on the lower floor.

Step 4: Hoist the upper prefabricated large-slab shear wall with hidden support into place, and connect the left and right corners of the prefabricated large-slab shear wall with hidden support with 16 notched steel bars 1 and connecting steel bars 3 indirectly , the connecting steel bar 3 in the middle groove notch 5 area passes through the pre-embedded annular reinforcing rib 8 and indirectly overlaps.

Step 5: Insert the lower stiffeners 14 at the notches 16 of the left and right corners into the square steel pipes 13 at the notches 16 of the left and right corners, and weld the joints of the upper and lower steel pipes 13.

Step 6: Set up the formwork at the left and right corner gaps 16, and then pour micro-expansion self-flowing compact concrete into the left and right corner gaps 16 and the square steel pipe 13. After the cast-in-place concrete 17 is cured, a typical prefabricated assembly with darkened concrete is completed. Fabrication of braced slab shear wall units.

Claims (9)

1. A prefabricated assembly type band concealed support large slab shear wall structure, comprising upper and lower prefabricated band concealed support reinforced concrete slabs and cast-in-situ concrete; said band concealed support reinforced concrete slabs include prefabricated wall panels, four-corner notches , reserved slots, distributed steel bars, lattice steel bars, hidden column longitudinal bars and stirrups, square steel pipes, X-shaped steel diagonal braces, and ring-shaped reinforcement bars; The shaped steel diagonal brace is welded into a steel skeleton through L angle steel, which is jointly stressed with the steel mesh and concrete; the top of the square steel pipe has stiffening ribs and extends into the upper square steel pipe for a certain distance; There are ring-shaped reinforcing ribs in the area; the four-corner notches are indirectly overlapped through connecting steel bars and notched reinforcing bars, and the central groove-shaped notch area is indirectly overlapped through connecting steel bars inserted into the ring-shaped reinforcing ribs. 2. The prefabricated large-slab shear wall structure with concealed support according to claim 1, characterized in that the prefabricated assembled reinforced concrete with concealed support is prefabricated in a factory, with four-corner notches, and notched steel bars are reserved for the notches. 3. The prefabricated large slab shear wall structure with concealed support according to claim 1, characterized in that when the reinforced concrete slab is prefabricated, the X-shaped steel plate diagonal brace with shear nails is arranged in the wall panel. 4. The prefabricated large slab shear wall structure with concealed support according to claim 1, wherein the prefabricated reinforced concrete slab has a concealed column, and the core of the concealed column is a square steel pipe, and the square steel pipe is used in the prefabricated large slab Insertion, and no concrete is poured into the square steel pipe during prefabrication. 5. The prefabricated assembly type band concealed support large slab shear wall structure according to claim 1, characterized in that the X-shaped steel diagonal brace in the prefabricated reinforced concrete slab and the square steel pipe in the concealed column are welded by L angle steel to form a steel skeleton. 6. The prefabricated large slab shear wall structure with concealed support according to claim 1, characterized in that the inside of the top of the square steel pipe in the prefabricated reinforced concrete slab is welded with stiffeners, and the stiffeners protrude from the top of the square steel pipe to a certain extent. Insert the bottom of the upper square steel pipe after the distance. 7. The prefabricated large-slab shear wall structure with concealed support according to claim 1, characterized in that groove-shaped gaps are reserved in the middle of the upper and lower ends, and the prefabricated wall panels on both sides of the gap are connected by lattice steel bars. In addition, the prefabricated wall panels are pre-embedded with some ring-shaped reinforcing ribs leaking out of the groove gap. 8. The prefabricated large slab shear wall structure with concealed support according to claim 1, characterized in that, the four-corner notch area is indirectly overlapped by connecting steel bars and notch steel bars, and the central groove-shaped notch area is inserted into the ring by connecting steel bars Indirect lap joints inside the ribs. 9. The prefabricated large-slab shear wall structure with concealed support according to claim 1, characterized in that the reinforced concrete slab wall body with four-corner notches is prefabricated, and the four-corner notch area and the central groove-shaped notch area are cast-in-situ, X-shaped steel diagonal braces and square steel pipes are embedded during prefabrication. After the parts are connected on site, the necessary micro-expansion type self-flowing dense concrete is poured into the formwork to form a prefabricated large-slab shear wall with hidden support.