CN111691578A - Reinforcing bar structure for integrally arranging edge member reinforcing bars on prefabricated wall and post-cast section - Google Patents

Abstract

The invention discloses a reinforcement arrangement structure for arranging edge member reinforcements on a prefabricated wall and a post-pouring section in a lump. Based on the whole edge component that vertical post-cast section and prefabricated wall edge component formed, vertical reinforcing bar and stirrup in the whole edge component of overall configuration are planned, in shear force wall reinforcement structure allowed range, suitably enlarge prefabricated wall edge component vertical reinforcement interval, shift the prefabricated wall edge component vertical reinforcement adjacent with vertical post-cast section to vertical post-cast section in, increase the interval that the horizontal connection reinforcing bar stretches out on the prefabricated wall side simultaneously, dispose the stirrup respectively at vertical post-cast section and prefabricated wall edge component and form the subregion restraint to concrete formation in the whole edge component. The invention can reduce the number of the vertical steel bar connections of the edge component of the prefabricated wall and the number of the horizontal connecting steel bars extending out of the side surface by more than 30 percent, reduce the cost of the prefabricated wall and the processing and installation difficulty, and improve the reliability of the vertical steel bar connection in the integral edge component.

Description

Reinforcement structure of prefabricated wall and post-cast section with edge member reinforcement

technical field

The invention belongs to the technical field of construction, relates to a prefabricated shear wall, and in particular relates to a reinforcement structure in which the prefabricated wall and the post-cast section are arranged with reinforcement bars for edge members.

Background technique

At present, the prefabricated walls used in the prefabricated integral shear wall structure in my country are mostly prefabricated as a whole along the thickness direction of the wall. The vertical steel bars of the upper and lower prefabricated walls are connected by sleeve grouting at the root of the prefabricated wall. The pouring section is connected, and the horizontal connecting steel bars protruding from the side of the prefabricated wall are anchored in the post-casting concrete of the vertical post-casting section.

When the adjacent prefabricated walls are connected at the edge member position, the vertical post-casting section and the edge member area of the prefabricated wall together form the edge member of the shear wall after pouring concrete. In the existing structure recommended by the current national design code and the precast wall design standard atlas, the vertical post-cast section and the edge member area of the precast wall are respectively equipped with vertical reinforcement bars for the edge members of the shear wall, and the vertical post-cast section, The combination relationship of the prefabricated wall edge member area results in more vertical reinforcement bars for edge members in the edge member area of the prefabricated wall. degree of waste. At the same time, the cost of the steel joints (such as sleeve grouting joints) used for the vertical steel bar connection of the edge members of the upper and lower prefabricated walls is significantly higher than that of the steel joints (such as straight thread joints) used for the vertical steel bar connection in the vertical post-cast section of the upper and lower floors. ), which is even higher than the cost of the vertical reinforcement of the edge members of the prefabricated wall. The existing structural prefabricated wall edge members have more vertical reinforcement bars, which further increases the cost of the joint.

On the other hand, the existing structure requires the prefabricated wall edge member stirrups to protrude one by one as horizontal connecting bars into the vertical post-cast section to meet the requirements of the current national design code for the vertical spacing of shear wall edge member stirrups , The distance between the horizontal connecting steel bars of the prefabricated wall is mostly 100-200mm, and the number of extending steel bars is large, which leads to a large number of openings in the side molds during the production of prefabricated walls. The standardization and generalization of the side molds are low, and they cannot be reused. During transportation and on-site installation, the number of protruding steel bars is large, and it is difficult to protect the finished product. The extending horizontal connecting steel bars are often repeatedly bent, which affects its mechanical performance and structural safety, and makes it difficult to hoist the prefabricated wall and bind the steel bars in the vertical post-casting section. It is difficult and the quality is difficult to control.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned shortcomings of the existing adjacent precast walls connected by vertical post-cast sections, the purpose of the present invention is to provide a reinforcement structure for prefabricated walls and post-cast sections to arrange edge member reinforcement bars, based on the vertical post-cast section. The integral edge member formed with the edge member area of the prefabricated wall arranges the vertical reinforcement bars and stirrups in the integral edge member as a whole. Within the allowable range of the shear wall reinforcement structure in the current national design code, the vertical reinforcement spacing of adjacent edge members shall be appropriately enlarged, and the vertical reinforcement of the precast wall edge members adjacent to the vertical post-cast section shall be transferred to the vertical post-cast section. The number of vertical steel bar connections of edge members of the prefabricated wall can be reduced by about 30%, the number of sleeve grouting connection joints of the prefabricated wall can be effectively reduced, and the cost of the prefabricated wall can be reduced. Considering that the grouting construction quality of the sleeve grouting connection joint of the prefabricated wall is difficult to guarantee at present, the straight threaded joint used for the vertical steel bar in the vertical post-casting section is mature and reliable in quality. The reliability of vertical steel bar connections in edge members ensures structural safety. Based on the prefabricated wall protruding horizontal connecting bars, it only needs to meet the shear bearing capacity check of the inclined section of the shear wall, and the spacing of the prefabricated wall extending horizontal connecting bars is increased to 300mm, so as to reduce the number of prefabricating wall extending horizontal connecting bars. More than 30%, realize the standardization and generalization of side molds, reduce the cost of prefabricated walls through the reuse of side molds, and at the same time help to simplify the reinforcement of prefabricated walls during production. efficiency.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A reinforcement structure in which the prefabricated wall and the post-casting section are arranged with the reinforcement of the edge member. The adjacent precast walls 2 are connected as a whole through the vertical post-cast section 1 at the edge member position. The prefabricated wall edge member area 21 forms an integral edge member. The vertical steel bars arranged in the integral edge member provide the shear wall with bending resistance, and the stirrups in the integral edge member confine the concrete to ensure the elastic-plastic deformation capacity of the shear wall.

The overall scope of the vertical post-cast section 1 and the precast wall edge member area 21 is determined according to the range of shear wall edge members suggested by the current design code, breaking through the geometric boundary of the vertical post-cast section 1 and the precast wall edge member area 21 , the overall arrangement of vertical reinforcement bars and stirrups in the integral edge member ensures that the integral edge member realizes its structural function of providing bending resistance and ensuring the elastic-plastic deformation capacity of the shear wall.

Within the allowable range of the shear wall reinforcement structure, enlarge the spacing between adjacent vertical reinforcement bars in the integral edge member, the spacing between the vertical reinforcement bars 24 of the edge members of the adjacent prefabricated walls, the vertical reinforcement bars 11 of the edge members of the adjacent vertical post-cast sections The spacing between the vertical reinforcement bars 24 of the prefabricated wall edge members and the vertical reinforcement bars 11 of the edge members of the vertical post-casting section is not more than 350mm, and when it is greater than 300mm, the vertical reinforcement bars 24 of the prefabricated wall edge members and the vertical back The vertical reinforcement bars 11 of the edge members of the pouring section are provided with the vertical structural reinforcement bars 15 of the edge members.

Transfer the vertical reinforcement bars 24 of the prefabricated wall edge members that were originally arranged in the prefabricated wall 2 and adjacent to the vertical post-cast section 1 to the vertical post-cast section 1 to reduce the number of vertical reinforcement bars 24 of the prefabricated wall edge members; the The diameters of the vertical steel bars 24 for the edge members of the precast wall and the vertical steel bars 11 for the edge members of the vertical post-cast section are not less than 12 mm. The current code requires the minimum reinforcement ratio for vertical reinforcement of edge members.

The vertical reinforcement bars 24 of the edge members of the prefabricated walls on the upper and lower layers are connected by joints suitable for the connection of the vertical reinforcement bars of the prefabricated walls, such as sleeve grouting connection joints, mechanical connection joints or constraining grout anchor joints. Connector connection requirements.

The vertical steel bars 11 of the edge members of the vertical post-casting section of the upper and lower floors are connected by straight thread joints. The joints are arranged above the floor slab to the range below the second prefabricated wall protruding from the horizontal connecting steel bars 25. The joints are arranged at the same height or staggered by a certain distance. Avoid 100% connections in the same connection section to reduce the requirements for joint performance.

The vertical structural steel bars 15 of the edge members have a diameter of 8 to 10 mm, the upper and lower floors are not connected, and do not participate in force calculation. underside.

In the prefabricated wall edge member area 21 and the vertical post-casting section 1, the precast wall edges that do not exceed the prefabricated wall edge member area 21 and the vertical post-casting section 1 are respectively arranged between adjacent precast walls protruding from the horizontal connecting steel bars 25. The member stirrups 26 and the vertical post-casting section stirrups 12 form zonal constraints on the concrete in the integral edge member.

The distance between the horizontal connecting steel bars 25 protruding from the adjacent prefabricated walls is 300mm, and the diameter is not less than 8mm. The distance between limbs is not more than 300mm, and the distance along the vertical direction is not more than 200mm.

The prefabricated wall edge member stirrups 26 and the vertical post-casting section stirrups 12 are welded closed stirrups, or common 135° hook stirrups.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The number of vertical steel bars in the inner edge members of the prefabricated wall can be reduced by about 30%, which can effectively reduce the cost of its joints, reduce the prefabrication of prefabricated shear wall joints and the corresponding steel bar processing, and improve the production efficiency of prefabricated walls.

(2) Arranging the vertical steel bars with a larger area ratio in the vertical post-cast section and connecting them with straight threaded joints can improve the reliability of the vertical steel bar connections in the overall edge member and ensure the overall structural safety.

(3) The number of horizontal connecting steel bars extending out of the prefabricated wall can be reduced by more than 30%, which can greatly reduce the number of side mold openings during the production of prefabricated walls, which is conducive to the standardization and generalization of side molds. wall cost. It is also beneficial to the protection of the finished product extending out of the horizontal connecting steel bar and improving the hoisting efficiency of the prefabricated wall.

(4) The spacing of vertical steel bars in the prefabricated wall is increased, which is convenient for the pre-embedded arrangement of equipment pipelines, wire boxes, etc., and reduces mutual interference.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention when the high-efficiency reinforcement structure of the prefabricated wall and the post-cast section with the edge member reinforcement is applied to the connection of the hole-side precast edge member and the vertical post-cast section, wherein the edge of the side wall where the precast wall is located The length a of the component area is between 350 and 450 mm.

FIG. 2 is the comparative example of FIG. 1 , that is, a schematic structural diagram of the existing hole-side prefabricated edge member being connected to the vertical post-casting section.

3 is a schematic structural diagram of the present invention applied to the connection of the prefabricated edge member on the side of the opening and the vertical post-casting section, wherein the length a of the edge member region of the side wall where the prefabricated wall is located is between 450 and 650 mm.

4 is a schematic structural diagram of the present invention applied to the connection between the prefabricated edge member on the side of the opening and the vertical post-cast section, wherein the length a of the edge member region of the side wall where the prefabricated wall is located is between 650 and 850 mm.

5 is a schematic structural diagram of an improved version when the present invention is applied to the connection between the prefabricated edge member on the side of the hole and the vertical post-casting section, wherein the edge member vertical structural steel bars are arranged in the edge member area of the prefabricated wall, and the wall member on the side where the prefabricated wall is located is arranged. The length a of the edge member region is between 400 and 500 mm.

FIG. 6 is the comparative example of FIG. 5 , that is, a schematic structural diagram of the existing hole-side prefabricated edge member being connected to the vertical post-casting section.

7 is a schematic view of the improved structure when the present invention is applied to the connection between the prefabricated edge member on the side of the opening and the vertical post-cast section, wherein the length a of the edge member region of the side wall where the prefabricated wall is located is between 500 and 600 mm.

8 is a schematic view of the improved structure when the present invention is applied to the connection of the prefabricated edge member on the side of the opening and the vertical post-casting section, wherein the length a of the edge member region of the side wall where the prefabricated wall is located is between 600-800 mm.

9 is a schematic structural diagram of the present invention applied to the connection between the prefabricated edge member on the side of the opening and the vertical post-casting section and the edge member area of the prefabricated wall is small, wherein the length a of the edge member area of the side wall where the prefabricated wall is located is between 400-600mm between.

Figure 10 is a schematic structural diagram of the present invention applied to the connection between the prefabricated edge member on the side of the opening and the vertical post-casting section and the edge member area of the prefabricated wall is small, wherein the length a of the edge member area of the side wall where the prefabricated wall is located is between 600-800mm between.

Fig. 11 is a schematic structural diagram of the present invention applied to the edge member of the prefabricated wall without openings extending out of the horizontal connecting steel bar along the thickness direction of the parallel wall to connect with the vertical post-casting section.

Fig. 12 is a schematic structural diagram of the present invention applied to the edge member of the prefabricated wall without openings extending out of the horizontal connecting steel bar along the vertical wall thickness direction to connect with the vertical post-casting section.

FIG. 13 is a schematic structural diagram of the present invention applied to the connection between the horizontal connecting steel bars extending from the middle of the prefabricated wall along the vertical wall thickness direction and the vertical post-casting section.

FIG. 14 is a schematic structural diagram of the L-shaped connection node of the longitudinal and transverse prefabricated walls in the shear wall structure of the present invention.

FIG. 15 is a front view of A-A in FIG. 14 .

FIG. 16 is a front view of B-B in FIG. 14 .

FIG. 17 is a schematic cross-sectional view of the L-shaped connecting node shown in FIG. 14 at the position 1-1 in FIGS. 15 and 17 .

FIG. 18 is a comparative example of FIG. 14 , that is, a schematic structural diagram of an L-shaped connection node of longitudinal and transverse prefabricated walls in an existing shear wall structure.

FIG. 19 is a front view of C-C in FIG. 18 .

FIG. 20 is a front view of D-D in FIG. 18 .

Figure 21 is a schematic structural diagram of an improved L-shaped connection node of the longitudinal and transverse prefabricated walls of the present invention applied to the shear wall structure.

FIG. 22 is a front view of E-E in FIG. 21 .

FIG. 23 is a front view of F-F in FIG. 21 .

FIG. 24 is a schematic cross-sectional view of the L-shaped connecting node shown in FIG. 21 at the position 2-2 in FIGS. 22 and 23 .

FIG. 25 is a schematic structural diagram of the T-shaped connection node of the vertical and horizontal prefabricated walls in the shear wall structure of the present invention.

Fig. 26 is a comparative example of Fig. 25, that is, a schematic structural diagram of a T-shaped connection node of longitudinal and transverse prefabricated walls in the existing shear wall structure.

FIG. 27 is a schematic structural diagram of an improved T-shaped connection node of the vertical and horizontal prefabricated walls of the present invention applied to the shear wall structure.

In the figure: 1-vertical post-casting section; 2-precast wall; 3-precast wall one; 4-precast wall two; 5-precast wall three; Back-casting section stirrups; 13-vertical post-casting section tie bars; 14-additional connecting bars; 15-edge member vertical structural steel bars; 21-precast wall edge member area; 22-precast wall opening area; 23-precast Wall body area; 24-vertical reinforcement of prefabricated wall edge members; 25-prefabricated wall extending horizontally connecting steel bars; 26-prefabricated wall edge member stirrups; 27-prefabricated wall edge member tension bars; 28-prefabricated wall body connection Vertical steel bars; 29-prefabricated walls are not connected to vertical steel bars; 30-prefabricated walls are horizontally distributed steel bars.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in Fig. 1 to Fig. 27, the present invention is a high-efficiency reinforcement structure of the prefabricated wall and the post-cast section with the edge member reinforcement, which is used for the connection of the precast wall 2 and the vertical post-cast section 1 at the edge member position of the shear wall. After pouring, the vertical post pouring section 1 and the precast wall edge member area 21 form an integral edge member after concrete is poured. The invention optimizes and improves the structure of vertical steel bars, stirrups and prefabricated wall extending horizontal connecting steel bars of integral edge members. Break through the geometric boundary between the vertical post-casting section 1 and the precast wall edge member area 21, and arrange the vertical steel bars and stirrups in the overall edge member to ensure that the overall edge member can provide its bending resistance and ensure the elastic-plasticity of the shear wall. Structural function of deformability.

Specifically, within the allowable range of the shear wall reinforcement structure in the current national design code, the vertical reinforcement bars 24 of the edge members of the adjacent prefabricated walls and the vertical reinforcement bars 11 of the edge members of the vertical post-casting section are about 150mm in the existing structure, It should not be larger than 200mm and should not be larger than 350mm. At the same time, the vertical reinforcement arrangement of the vertical post-cast section 1 and the precast wall edge member area 21 should be considered as a whole, and the existing structure should be placed in the precast wall 2 and adjacent to the vertical post-cast section. The vertical reinforcement bars 24 of the prefabricated wall edge members in 1 are canceled, so as to reduce the vertical reinforcement bars 24 of the prefabricated wall edge members in the prefabricated wall edge member area 21, and control the cost of the reinforcement joints used to connect the vertical reinforcement bars 24 of the prefabricated wall edge members on the upper and lower floors.

In the present invention, the vertical steel bars 24 of the edge members of the upper and lower prefabricated walls can be connected by joints suitable for the connection of the vertical steel bars of the prefabricated walls, such as sleeve grouting connection joints, mechanical connection joints or constraining grout anchor joints. The vertical steel bars 24 of the prefabricated wall edge members The structure conforms to the corresponding joint connection requirements. The vertical steel bars 11 of the inner edge members of the vertical post-casting section of the upper and lower floors should be connected by straight thread joints. The joints should be arranged above the floor slab to the range below the horizontal connecting steel bars 25 of the second prefabricated wall. The joints can be arranged at the same height. It can also be staggered by a certain distance to avoid 100% connection in the same connection section, so as to reduce the requirements on the performance of the joint; on the premise of reliable technology, other forms of steel bar joints or binding lap joints can also be used.

In the present invention, the overall reinforcement area of the vertical reinforcement bars 24 of the prefabricated wall edge members in the integral edge members and the vertical reinforcement bars 11 of the edge members in the vertical post-casting section needs to be checked for the flexural bearing capacity of the shear wall, and must meet the current The code specifies the minimum reinforcement ratio requirements for vertical reinforcement of edge members. After the number of vertical reinforcement bars 24 of prefabricated wall edge members is reduced, the reduced area of vertical reinforcement bars in the prefabricated edge member area 21 can be compensated by increasing the total area of vertical reinforcement bars 11 of edge members in the vertical post-casting section to ensure the shear force The bending resistance of the wall.

In the present invention, the total number of vertical reinforcing bars 24 for prefabricated wall edge members in the integral edge member and vertical reinforcing bars 11 for edge members in the vertical post-casting section is reduced. 24. The diameter of the vertical steel bar 11 of the inner edge member of the vertical post-casting section is increased. The inner diameter and the absolute value of anchoring length of the steel bar grouting sleeve with a larger diameter are larger than those of the steel bar with a smaller diameter, and the grouting quality of the sleeve grouting connection joint of the vertical steel bar 24 of the prefabricated wall edge member is easier to guarantee. After the diameter of the vertical steel bars 11 of the inner edge members of the vertical post-casting section is increased, it is more convenient to use straight threaded joints for connection. It is more convenient to bind the stirrups 12 in the post-cast section. At the level of the prior art, the quality of straight threaded joints is more reliable than that of sleeve grouting joints. In the present invention, vertical steel bars with more areas are arranged in the vertical post pouring section 1 and connected by straight threaded joints, which helps to improve the quality of the joints. The reliability of vertical steel bar connections in integral edge members improves overall structural safety.

In particular, when the distance between the vertical reinforcement bars 24 of the edge members of the adjacent prefabricated walls and the vertical reinforcement bars 11 of the inner edge members of the vertical post-casting section is greater than 300 mm, the vertical structural reinforcement bars 15 of the edge members can be arranged therebetween to ensure the inner stirrups of the edge members. , The distance between the limbs of Lajin along the horizontal direction is not more than 300mm. The diameter of the vertical structural steel bar 15 of the edge member should be 8-10mm, the upper and lower floors are not connected, and the vertical structural steel bar 15 of the edge member located in the prefabricated wall 2 does not protrude from the top and bottom surfaces of the prefabricated wall 2.

Further, considering that the prefabricated wall extending out of the horizontal connecting steel bar 25 only needs to meet the shear bearing capacity of the shear wall inclined section, the prefabricated wall is extended within the allowable range of the shear wall horizontally distributed reinforcing bar structure in the current national design code. The spacing of the horizontal connecting steel bars 25 is increased from 100-200 mm in the existing structure to 300 mm, so as to reduce the number of the horizontal connecting steel bars 25 protruding from the prefabricated wall by more than 30%, realize the standardization and generalization of the side form, and reduce the difficulty of production and construction . The diameter of the horizontal connecting steel bar 25 from the prefabricated wall should not be less than 8 mm, and the reinforcement area should meet the requirements of the shear bearing capacity check calculation of the inclined section of the shear wall. When the horizontal connecting steel bar 25 protruding from the prefabricated wall does not extend to the end of the edge member, the additional connecting steel bar 14 needs to be laid in the vertical post-cast section 1 to overlap and connect with the horizontal connecting steel bar 25 extending from the prefabricated wall. The overlap length of the two Need to meet the force transmission requirements.

After the spacing between the horizontal connecting bars 25 protruding from the prefabricated wall is increased to 300mm, the horizontal connecting bars 25 extending from the prefabricated wall alone cannot meet the requirements of the current national design code for the vertical spacing of the shear wall edge member stirrups. In the present invention, in the prefabricated wall edge component area 21 and the vertical post-casting section 1, the adjacent prefabricated walls are respectively arranged between the horizontal connecting bars 25 that do not exceed the prefabricated wall edge component area 21 and the vertical post-casting section 1. The wall edge member stirrups 26 and the vertical post-casting section stirrups 12. Combined with the horizontal connecting steel bar 25 and the additional connecting steel bar 14 extending from the prefabricated wall, the vertical spacing of the stirrups and tie bars in the integral edge member is not more than 200mm and most of them are 150mm, and the leg spacing along the horizontal direction is not more than 300mm, which meets the current requirements. Structural requirements for stirrups and tie bars for edge members of shear walls in national design codes. The concrete in the edge member area of the prefabricated wall and in the vertical post-casting section can achieve the same partitioned stirrup constraint effect as the existing structure, and the stirrup-constrained concrete in the overall edge member can ensure the elastic-plastic deformation capacity of the shear wall.

In the present invention, the prefabricated wall edge member stirrups 26 and the vertical post-casting section stirrups 12 can be welded closed hoops or common 135° hook stirrups.

Fig. 1 provides a connection structure of the present invention applied to the prefabricated edge member on the side of the opening and the vertical post-casting section. The prefabricated wall 2 is a prefabricated wall with an opening, and the edge members on one side of the opening area 22 of the prefabricated wall are all prefabricated wall edge member areas. 21. The length a of the edge member area 21 of the prefabricated wall is between 350 and 450 mm. The prefabricated wall extends from the horizontal connecting steel bar 25 to the end of the vertical post-cast section 1 and is directly anchored in the vertical post-cast section 1. Lay additional connecting bars 14. FIG. 2 shows the comparative example of FIG. 1 , that is, the connection structure of the existing hole-side prefabricated edge member and the vertical post-casting section 1 . Compared with the comparative example, the structure shown in FIG. 1 increases the spacing between the vertical reinforcement bars 24 of the adjacent prefabricated edge members in the prefabricated wall edge member area 21 from about 150 mm to about 200 mm, and cancels the prefabricated wall edge member area 21 immediately adjacent to the vertical rear. The vertical reinforcement bars 24 of the prefabricated wall edge members in the pouring section 1, the vertical reinforcement bars 24 of the prefabricated wall edge members in the prefabricated wall edge member area 21 are reduced from 6 to 4, a reduction of 33%; The number of steel bars 11 is the same as that of the comparative example. By increasing the diameters of the vertical steel bars 11 for the edge members of the vertical post-casting section and the vertical steel bars 24 for the edge members of the prefabricated wall, the total area is consistent with the comparative example, or the shear wall resistance is satisfied. Bending capacity check requirements.

Figures 3 and 4 provide schematic diagrams of the structure when the structure of the present invention shown in Figure 1 is applied to the prefabricated wall edge member area 21 when the length a is between 450-650mm and 650-850mm, and the prefabricated wall edge member area 21 is configured with 6, 8 The vertical steel bars 24 of the edge members of the prefabricated wall are used to control the spacing between the vertical steel bars 24 of the edge members of the adjacent prefabricated walls and the vertical steel bars 11 of the edge members of the vertical post-casting section to be no more than 210mm.

As shown in FIG. 5 , on the basis of FIG. 1 , an improved connection structure of the present invention applied to the prefabricated edge member on the side of the opening and the vertical post-cast section is provided. The prefabricated wall 2 has a prefabricated wall with an opening, and the prefabricated wall opening area is The edge members on one side of 22 are all prefabricated wall edge member regions 21, and the length a is between 400 and 500 mm. FIG. 6 shows the comparative example of FIG. 5 , that is, the connection structure of the existing hole-side prefabricated edge member and the vertical post-casting section. Compared with the comparative example, the structure shown in FIG. 5 uses the spacing between the vertical reinforcement bars 24 of the edge members of the adjacent prefabricated walls, the spacing between the vertical reinforcement bars 11 of the edge members of the adjacent vertical post-casting sections, and the vertical reinforcement bars 24 and the vertical reinforcement bars of the edge members of the prefabricated walls. When the distance between the vertical reinforcement bars 11 of the edge members of the back-casting section is increased to no more than 350mm, and the spacing of the vertical reinforcement bars 24 of the edge members of the adjacent prefabricated walls and the vertical reinforcement bars 11 of the edge members of the vertical post-cast section is not more than 300mm , no vertical structural steel bars 15 for edge members are set between adjacent steel bars; when the spacing is greater than 300mm, vertical structural steel bars 15 for edge members are set between adjacent steel bars, and the diameter of vertical structural steel bars 15 for edge members should be 8 to 10 mm , the upper and lower floors are not connected and do not participate in the force calculation, and the vertical structural steel bars 15 of the edge members located in the prefabricated wall 2 do not protrude from the top and bottom surfaces of the prefabricated wall 2 . Compared with the comparative example, the vertical steel bars 24 of the edge members of the prefabricated wall shown in Fig. 5 are reduced from 8 to 4, and the number of vertical steel bars 11 of the edge members of the vertical post-casting section is the same as that of the comparative example. The diameters of the vertical steel bars 11 for the edge members of the segment and the vertical steel bars 24 for the edge members of the prefabricated wall are to keep the total area consistent with the comparison ratio, or to meet the requirements for the calculation of the flexural bearing capacity of the shear wall.

Figures 7 and 8 provide schematic diagrams of the structure shown in Figure 5 when the present invention is applied to the prefabricated wall edge member area 21 with a length a ranging from 500 to 600 mm and 600 to 800 mm. The prefabricated wall edge member area 21 is configured with 4, 6 Root precast wall edge member vertical reinforcement 24.

Figure 9 provides another connection structure of the present invention applied to the prefabricated edge member on the side of the opening and the vertical post-casting section. In prefabrication, the edge member area on the side of the wall pier opening where the prefabricated wall 2 is located is formed by the combination of the prefabricated wall edge member area 21 and a part of the vertical post-casting section 1 . The length of the prefabricated wall edge member area 21 of the prefabricated wall 2 is small, about 350-400 mm, and two rows of four prefabricated wall edge member vertical steel bars 24 are arranged on the side of the prefabricated wall edge member area 21 close to the prefabricated wall opening area 22 to control the The spacing is not more than 200mm. The prefabricated wall protrudes from the horizontal connecting steel bar 25 to the end of the vertical post-casting section 1 and is directly anchored in the vertical post-casting section 1 without the need to arrange additional connecting steel bars 14 .

Further, when the length a of the edge member area on the side of the wall pier opening where the prefabricated wall 2 is located in FIG. 9 is increased to 600-800 mm, the prefabricated wall extends the horizontal connecting steel bar 25 directly to the end of the vertical post-casting section 1 At this time, the length of the prefabricated wall is long, which is inconvenient for processing and transportation. At this time, the prefabricated wall can be extended from the horizontal connecting steel bar 25 into the vertical post-cast section 1 for a certain length according to Figure 10, and additional connections can be arranged in the vertical post-cast section 1. The steel bar 14 and the horizontal connecting steel bar 25 extending from the prefabricated wall are lapped to transmit force, and the lap length of the two should meet the force transmission requirements. In the overlapping area of the additional connecting steel bar 14 and the horizontal connecting steel bar 25 extending from the prefabricated wall, four vertical steel bars 11 for the edge members of the vertical post-cast section are arranged. The spacing between the vertical reinforcing bars 24 and the vertical reinforcing bars 11 of the edge members of the vertical post-casting section is uniform and should not be greater than 200 mm.

Figure 11 provides a connection structure of the present invention applied to the prefabricated wall 2 without openings and the vertical post-casting section 1. The side surface of the prefabricated wall 2 extends parallel to the thickness direction of the prefabricated wall and extends out of the horizontal connecting steel bar 25, extending to the vertical direction. The end of the post-casting section 1 is directly anchored in the vertical post-casting section 1, and there is no need to arrange additional connecting reinforcement bars 14. In the prefabricated wall body area 23 of the prefabricated wall 2, there are prefabricated wall body connected vertical steel bars 28 and prefabricated wall body non-connected vertical steel bars 29. The prefabricated wall edge component area 21 is close to the prefabricated wall body area 23-1 A row of two prefabricated wall edge member vertical steel bars 24 are arranged on the side, and edge member vertical structural steel bars 15 are arranged on the side adjacent to the vertical post-casting section 1, that is, the prefabricated wall edge member vertical steel bars 24 are replaced by four in the existing structure. Reduce to 2 as shown in FIG. 11 , by increasing the vertical reinforcement bars 11 of the edge member of the vertical post-cast section adjacent to the edge member area 21 of the prefabricated wall to achieve the effect of providing bending resistance.

FIG. 12 provides another connection structure of the present invention applied to the prefabricated wall 2 without openings and the vertical post-casting section 1. The prefabricated wall 2 protrudes from the prefabricated wall along its thickness direction perpendicular to the horizontal connecting steel bar 25, and extends into the vertical direction. The post pouring section 1 is lapped and connected with the additional connecting steel bar 14, and the lapped length of the two meets the force transmission requirements. In the existing structure, the vertical reinforcement bars 24 of the edge members of the prefabricated wall adjacent to the vertical post-casting section 1 are replaced by the vertical structure reinforcement bars 15 of the edge members, that is, the vertical reinforcement bars 24 of the edge members of the prefabricated wall are reduced from 6 in the existing structure to 6. As shown in FIG. 11 , by increasing the vertical reinforcement bars 11 of the edge members of the vertical post-cast section adjacent to the edge member area 21 of the prefabricated wall, the effect of providing the bending resistance is realized. The structure of the prefabricated wall body area 23 is the same as the existing plum-shaped structure. The prefabricated wall body is connected to the vertical steel bar 28 by using joints such as sleeve grouting. .

Fig. 13 provides a connection structure of the present invention applied to the prefabricated wall 2 in the middle and the vertical post-casting section 1. The prefabricated wall 2 protrudes out of the prefabricated wall along the thickness direction perpendicular to its thickness and extends out of the horizontal connecting steel bar 25. The pouring section 1 is lapped and connected with the additional connecting steel bar 14, and the lapped length of the two meets the force transmission requirements. In the existing structure, the vertical reinforcement bars 24 of the prefabricated wall edge members adjacent to the vertical post-casting section 1 are replaced by the edge member vertical structure reinforcement bars 15, that is, the vertical reinforcement bars 24 of the prefabricated wall edge members are reduced from 4 in the existing structure to 4. As shown in FIG. 13 , the vertical reinforcement bars 11 of the edge members of the vertical post-casting section adjacent to the edge member area 21 of the prefabricated wall are enlarged to achieve their effect of providing bending resistance.

Figures 14 to 17 provide a specific embodiment of the present invention applied to the L-shaped connection node of the vertical and horizontal prefabricated walls. The prefabricated wall 1 3 is a prefabricated wall with a hole, and the prefabricated wall 2 4 does not have a hole. The side where the prefabricated wall 2 4 is located The edge member areas of the wall piers are all located in the vertical post-casting section, and the prefabricated wall No. 2 4 does not include the prefabricated wall edge member area 21 . 18 to 20 are the structures of the L-shaped connection nodes of the longitudinal and transverse prefabricated walls in the existing shear wall structure, that is, the comparative examples of the specific embodiments of the present invention shown in FIGS. 14 to 17 . Figures 14 to 17 show the specific embodiment of the present invention in the prefabricated wall-3 prefabricated wall edge member area 21 in the comparative example, and the vertical reinforcement bars 24 of the prefabricated wall edge member adjacent to the vertical post-casting section 1, and the prefabricated wall is extended horizontally to connect The vertical steel bar 11 of the edge member of the vertical post-casting section at the end of the steel bar 25 is replaced with the vertical structural steel bar 15 of the edge member that is not connected to the upper and lower layers, and the vertical steel bar 24 of the edge member of the adjacent precast wall and the edge member of the vertical post-casting section are controlled. The spacing of the vertical reinforcement bars 11 is not more than 300 mm. Specific embodiments The vertical steel bars 24 of the edge members of the prefabricated wall and the vertical steel bars 11 of the edge members of the vertical post-casting section are reduced from 6 and 12 in the comparative example to 4 and 8, respectively. By increasing their diameters, the two can be guaranteed. The overall reinforcement area meets the requirements for checking the flexural bearing capacity of the shear wall, and at the same time meets the minimum reinforcement ratio requirements of the current code for the vertical reinforcement of edge members. The horizontal connecting steel bar 25 extending from the prefabricated wall can be used as the horizontal distribution bar 30 extending out of the prefabricated wall side.

Further, in the specific embodiment of the present invention shown in FIGS. 14 to 17 , the spacing of the prefabricated walls extending out of the horizontal connecting bars 25 from the prefabricated walls 1 3 and 2 4 is increased from 200 mm in the comparative example to 300 mm to reduce the number of prefabricated walls. The number of horizontal connecting steel bars 25 extending from the wall realizes the standardization and generalization of side molds during the production of prefabricated walls, and reduces the difficulty of production and construction. The diameter of the horizontal connecting steel bar 25 from the prefabricated wall should not be less than 8mm, and the area of the reinforcement should meet the requirements for checking the shear bearing capacity of the inclined section of the shear wall. The prefabricated wall of prefabricated wall 1 3 protrudes from the horizontal connecting steel bar 25 to the end of the vertical post-casting section 1, and is directly anchored in the vertical post-casting section 1, without laying additional connecting steel bars 14. The prefabricated wall of the prefabricated wall 24 protrudes from the horizontal connecting steel bar 25 and extends into the vertical post-casting section 1 to be overlapped and connected with the additional connecting steel bar 14, and the overlapped length of the two meets the force transmission requirement. The prefabricated wall protrudes from the horizontal connecting steel bar 25, the additional connecting steel bar 14 is also used as the prefabricated wall 1 3, the inner stirrup of the vertical post-casting section 1, and the precast wall edge member tie bars 27 and the vertical post-casting section are arranged at the corresponding vertical steel bars. The tie bars 13 control the distance between the stirrups and the tie bars in the overall edge member along the horizontal direction to be no greater than 300mm.

In particular, after the distance between the horizontal connecting bars 25 extended from the prefabricated wall is increased to 300mm, the horizontal connecting bars 25 extending from the prefabricated wall alone cannot meet the requirements of the current national design code for the vertical spacing of the shear wall edge member stirrups. As shown in FIGS. 15 to 17 , in the specific embodiment, in the prefabricated wall edge member area 21 and the vertical post-casting section 1 of the prefabricated wall 1 3, the adjacent prefabricated walls are respectively arranged between the horizontal connecting bars 25 not exceeding The prefabricated wall edge member area 21, the prefabricated wall edge member stirrups 26 of the vertical post-casting section 1, and the vertical post-cast section stirrups 12 form partitioned hoops for the precast wall edge member area 21 and the concrete in the vertical post-cast section 1 Rib restraint effect. Combined with the arrangement of the prefabricated wall edge member tie bars 27 and the vertical post-cast section tie bars 13, the distance between the stirrups and the tie bars in the overall edge member along the horizontal direction is controlled to be no greater than 300mm.

Combined with the horizontal connecting steel bar 25 and the additional connecting steel bar 14 extending from the prefabricated wall, the vertical spacing of the stirrups and tie bars in the overall edge member of the specific embodiment is 150mm, which is less than 200mm in the comparative example, which meets the current national design code for shearing Structural requirements for stirrups and ties for edge members of force walls. The confinement effect of the stirrups of the concrete in the integral edge member of the specific embodiment is better than that of the comparative example, which can ensure the elastic-plastic deformation capacity of the shear wall, and in the specific embodiment, the amount of stirrup binding in the vertical post-casting section is less, and the on-site construction is more convenient. for efficient.

Figures 21 to 24 are improvements of the specific embodiment of the present invention shown in Figures 14 to 17. The specific improvement lies in prefabricating the edge member area of the side wall where the prefabricated wall 24 is located, that is, at the end of the prefabricated wall 24. Set the precast wall edge component area 21. Referring to Fig. 11, the side of the prefabricated wall 24 protrudes out of the prefabricated wall along the thickness direction parallel to the horizontal connecting steel bar 25, extends to the end of the vertical post-casting section 1, and is directly anchored in the vertical post-casting section 1, without any additional layout Connect the rebar 14. In the prefabricated wall edge member area 21 of the prefabricated wall 2 4 near the prefabricated wall body area 23, a row of two prefabricated wall edge member vertical steel bars 24 are arranged, and the edge member vertical structure is arranged on the side adjacent to the vertical post-casting section 1 The reinforcing bar 15 achieves its function of providing bending resistance by increasing the vertical reinforcing bar 11 of the edge member of the vertical post-cast section adjacent to the edge member region 21 of the prefabricated wall. Compared with the specific embodiments shown in Figures 14 to 17, the improved vertical post-casting section 1 shown in Figures 21 to 24 has a significantly reduced range and a simpler shape, which facilitates the erection of the vertical post-casting section on site. 1 formwork, on-site construction is more efficient. The improved type contains 6 vertical bars 24 of prefabricated wall edge members and 6 vertical bars 11 of the inner edge members of the post-casting section, compared with the 4 vertical bars 24 of the precast wall edge members of the specific embodiment, and 8 vertical bars of the post-casting section. The vertical steel bars 11 of the edge members, the number of the overall vertical steel bars and the number of joints remain unchanged.

Figure 25 provides a specific embodiment of the present invention applied to the T-shaped connection node of the vertical and horizontal prefabricated walls. The prefabricated wall 1 3 and the prefabricated wall 3 5 are prefabricated walls with openings. The edge member regions of one side wall pier are all located in the vertical post-casting section, and the prefabricated wall 2 4 does not include the prefabricated wall edge member region 21 . FIG. 26 is the structure of the L-shaped connection node of the longitudinal and transverse prefabricated walls in the existing shear wall structure, that is, the comparative example of the specific embodiment of the present invention shown in FIG. 25 . The specific embodiment of the present invention shown in FIG. 25 is the vertical reinforcement bars 24 and the prefabricated wall 24 of the prefabricated wall edge components in the prefabricated wall edge component area 21 that are adjacent to the vertical post-cast section 1 in the comparative example. The vertical reinforcement bar 11 of the edge member of the vertical post-casting section protruding from the end of the horizontal connecting reinforcement bar 25 is replaced with the vertical structure reinforcement bar 15 of the edge member that is not connected to the upper and lower layers, and the vertical reinforcement bar 24 of the edge member of the adjacent prefabricated wall is controlled, and the vertical rear The spacing between the vertical reinforcement bars 11 of the edge members of the pouring section is not more than 300mm. Specific embodiments The vertical steel bars 24 of the edge members of the prefabricated wall and the vertical steel bars 11 of the edge members of the vertical post-casting section are reduced from 12 and 16 in the comparative example to 8 and 14, respectively. By increasing their diameters, the two can be guaranteed. The overall reinforcement area meets the requirements for checking the flexural bearing capacity of the shear wall, and at the same time meets the minimum reinforcement ratio requirements of the current code for the vertical reinforcement of edge members.

Fig. 27 is an improvement of the specific embodiment of the present invention shown in Fig. 25. The specific improvement lies in that the edge member area of the side wall where the prefabricated wall 24 is located is prefabricated, that is, the prefabricated wall edge member area is arranged at the end of the prefabricated wall 24 21. The structure is the same as that shown in FIG. 11 . Compared with the specific embodiment shown in FIG. 25 , the scope of the improved vertical post-casting section 1 shown in FIG. 27 is significantly reduced, and the shape is simpler, which is convenient for the site to support the formwork of the vertical post-casting section 1, and the on-site construction more efficient. The improved type contains 10 vertical reinforcement bars 24 for prefabricated wall edge members and 12 vertical reinforcement bars 11 for edge members in the post-casting section. The vertical steel bars 11 of the edge members, the number of the overall vertical steel bars and the number of joints remain unchanged.

To sum up, the present invention is based on the integral edge member formed by the vertical post-casting section and the prefabricated wall edge member, and the vertical steel bars and stirrups in the integral edge member are arranged in an overall manner, and the prefabricated wall is appropriately enlarged within the allowable range of the shear wall reinforcement structure. The distance between the vertical reinforcement bars of the edge members is to transfer the vertical reinforcement bars of the edge members of the prefabricated wall adjacent to the vertical post-cast section to the vertical post-cast section, and at the same time increase the spacing of the horizontal connecting reinforcement bars extending from the side of the precast wall, and then pour the vertical back-casting section in the vertical post-cast section. The segment and the edge members of the prefabricated wall are respectively equipped with stirrups to form zonal constraints on the concrete in the overall edge members. The invention can reduce the number of vertical steel bar connections and the number of lateral connecting bars extending from the side of the prefabricated wall edge member by more than 30%, reduce the cost of the prefabricated wall and the difficulty of processing and installation, and improve the reliability of the vertical steel bar connection in the overall edge member.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes and substitutions within the technical scope disclosed by the present invention, All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. A kind of reinforcement structure of prefabricated wall and post-cast section configuration edge member reinforcement bar, it is characterized in that, adjacent precast wall (2) is connected as a whole by vertical post-cast section (1) at edge member position, after pouring After the concrete is poured, the vertical post-casting section (1) and the prefabricated wall edge member area (21) form an integral edge member, and the vertical steel bars arranged in the integral edge member provide the shear wall with bending resistance, and the hoop in the integral edge member The reinforced concrete ensures the elastic-plastic deformation capacity of the shear wall. 2. The reinforcement structure of the prefabricated wall and the post-cast section configuring the edge member reinforcement according to claim 1, characterized in that, the overall range of the vertical post-cast section (1) and the precast wall edge member area (21) Determine the range of edge members of shear walls suggested by the current design code, break through the geometric boundary of the vertical post-cast section (1) and the edge member area of the prefabricated wall (21), and arrange the vertical reinforcement and stirrups in the overall edge member as a whole. , to ensure that the integral edge member realizes its structural function of providing bending resistance and ensuring the elastic-plastic deformation capacity of the shear wall. 3. The reinforcement structure of the prefabricated wall and the post-casting section configuration edge member reinforcement according to claim 1 is characterized in that, within the allowable range of the shear wall reinforcement structure, the adjacent vertical reinforcement in the overall edge member is enlarged Spacing, the spacing between the vertical reinforcement bars (24) of the edge members of the adjacent precast walls, the spacing of the vertical reinforcement bars (11) of the edge members of the adjacent vertical post-cast sections, and the vertical reinforcement bars (24) of the edge members of the precast walls and the vertical post-casting When the vertical reinforcement bars (11) of the edge members of the segment are adjacent to each other, the spacing is not greater than 350mm, and when it is greater than 300mm, the vertical reinforcement bars (24) of the edge members of the prefabricated wall and the vertical reinforcement bars (11) of the edge members of the vertical post-casting section shall be provided with edges. The member is vertically constructed with reinforcement bars (15). 4. The reinforcement structure of the prefabricated wall and the post-casting section of claim 3, wherein the prefabricated wall that is originally arranged in the precast wall (2) and adjacent to the vertical post-cast section (1) The vertical reinforcement bars (24) of the edge members are transferred into the vertical post-casting section (1) to reduce the number of vertical reinforcement bars (24) of the edge members of the prefabricated wall; the vertical reinforcement bars (24) of the edge members of the prefabricated wall and the The diameter of the vertical reinforcement bars (11) of the edge members in the backward pouring section shall not be less than 12mm, and the overall reinforcement area of the two shall meet the requirements for checking the flexural bearing capacity of the shear wall, and shall meet the minimum requirements for the vertical reinforcement bars of the edge members in the current code. Reinforcement ratio requirements. 5. The reinforcement structure of the prefabricated wall and the post-casting section configuration edge member reinforcement according to claim 3, it is characterized in that, the upper and lower prefabricated wall edge member vertical reinforcement (24) adopts sleeve grouting connection joint, mechanical connection joint Or constraining grout anchor joints and other joint connections suitable for the connection of the vertical steel bars of the prefabricated wall, and the structure of the vertical steel bars (24) of the edge members of the prefabricated wall conforms to the corresponding joint connection requirements. 6. The reinforcement structure of the prefabricated wall and the post-cast section configuration edge member reinforcement according to claim 3 is characterized in that, the upper and lower vertical post-cast section edge member vertical reinforcement bars (11) are connected by straight thread joints, and the joint The joints are arranged at the same height, or staggered by a certain distance, to avoid 100% connection in the same connection section, so as to reduce the performance requirements of the joints. 7. The reinforcing structure of the prefabricated wall and the post-casting section with the reinforcing bars of the edge members arranged in a coordinated manner according to claim 3, characterized in that the diameter of the vertical structural steel bars (15) of the edge members is 8-10 mm, and the upper and lower floors are not connected. . Do not participate in the force calculation, and the vertical structural steel bars (15) of edge members located in the prefabricated wall (2) do not protrude from the top and bottom surfaces of the prefabricated wall (2). 8. The reinforcement structure of the prefabricated wall and the post-casting section of the prefabricated wall and the reinforcement structure of the edge member configuration according to claim 1, characterized in that, in the prefabricated wall edge member area (21) and the vertical post-cast section (1), adjacent The prefabricated wall protruding from the horizontal connecting reinforcing bars (25) are respectively provided with prefabricated wall edge member stirrups (26) and vertical post-casting sections that do not exceed the prefabricated wall edge member area (21), the vertical post-casting section (1). The stirrups (12) form zonal constraints on the concrete in the integral edge member. 9. The reinforcement structure of the prefabricated wall and the post-casting section disposing edge member reinforcement bars according to claim 8, is characterized in that, the spacing between adjacent prefabricated walls extending horizontally connecting reinforcement bars (25) is 300mm, and the diameter is not less than 8mm, The reinforcement area shall meet the shear bearing capacity checking requirements of the inclined section of the shear wall; the distance between the legs of the stirrups and ties in the overall edge member along the horizontal direction is not more than 300mm, and the distance along the vertical direction is not more than 200mm. 10 . The reinforcement structure of the prefabricated wall and the post-casting section configuration of the edge member reinforcement according to claim 8, wherein the prefabricated wall edge member stirrups (26) and the vertical post-cast section stirrups (12) Use welded closed hoop, or use ordinary 135° hook stirrups.

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