Seismically strengthened diaphragm structure that resists concentrated loads

Abstract

The application relates to a building structure. The anti-seismic reinforced cross-mid concentrated force bearing coupling beam structure comprises a coupling beam, a concrete wall limb hidden column, a beam end reinforcement, the beam end reinforcement comprises a first longitudinal bottom plate in the form of a plate, and a stiffened double-angle steel is fixed above the first longitudinal bottom plate; a horizontal supporting plate is further embedded in the concrete wall limb hidden column, and an opening is formed on the four corners of the horizontal supporting plate, the hidden column longitudinal reinforcement is penetrated into the opening, and the horizontal supporting plate and the hidden column longitudinal reinforcement are welded; a second longitudinal bottom plate is embedded in the coupling beam and located above the coupling beam bottom reinforcement; one end of the beam end reinforcement is inserted into the concrete wall limb hidden column, the other end of the beam end reinforcement is embedded in the coupling beam, the first longitudinal bottom plate is placed on the horizontal supporting plate, and the end of the second longitudinal bottom plate is connected with the first longitudinal bottom plate. While ensuring that the floor load transferred by the main beam is smoothly transferred to the wall limb, the application does not affect the beam end of the coupling beam to generate the energy dissipation plastic hinge according to the design requirement under the earthquake.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of architecture, in particular to a building structure. BACKGROUND

[0002] In the design specification of high-rise buildings in China, it is required that the building can be not damaged in small earthquake, can be repaired in medium earthquake, and can not fall in large earthquake. In order to achieve the above goal, the coupling beam in the building concrete shear wall structure or frame shear wall structure plays a crucial role.

[0003] The existing anti-seismic structure is mainly the following three kinds:

[0004] 1. The main beam is arranged obliquely, so that the main beam is placed at the end of the wall limb, and the coupling beam directly bears the floor load. When this technology is adopted, the room needs to be installed with a suspended ceiling to hide the unsightly feeling caused by the oblique beam. The suspended ceiling will increase the cost and reduce the net height of the floor, and at the same time, this technology is not suitable for buildings without suspended ceiling conditions, such as apartments, residences, etc.

[0005] 2. The main beam is placed in the middle of the coupling beam, and the shear capacity of the coupling beam is increased by increasing the size of the coupling beam. When the lower net height of the coupling beam requires that the height of the coupling beam cannot be increased, this technology is not applicable.

[0006] 3. The main beam is placed in the middle of the coupling beam, and the shear capacity of the coupling beam is increased by embedding a shaped steel in the coupling beam. When this technology is adopted, the coupling beam adopts a "hard support" mode to ensure that the floor does not collapse in an earthquake. However, the shear and bending capacity of the coupling beam after embedding the shaped steel are both strengthened, and the coupling beam is still in the elastic stage when a medium earthquake or a large earthquake occurs. Although the safety of the main beam is ensured, the beam end cannot form a plastic hinge, which cannot absorb seismic energy, thereby losing the function of the earthquake fuse. Moreover, the existence of the shaped steel in the coupling beam will affect the arrangement of the steel bars in the wall limb hidden column, and will bring difficulties to the construction; at the same time, the shaped steel cuts off the anchoring of the longitudinal steel bars in the main beam, which will cause the cutting off of the longitudinal steel bars in the main beam. SUMMARY

[0007] The purpose of the present application is to provide an anti-seismic reinforced coupling beam structure bearing concentrated force in the middle of the span to solve the above technical problems.

[0008] The technical problem solved by the present application can be realized by the following technical scheme:

[0009] The anti-seismic reinforced coupling beam structure bearing concentrated force in the middle of the span comprises a coupling beam, a concrete wall limb hidden column located at both ends of the coupling beam, a coupling beam bottom bar embedded at the bottom of the coupling beam, and a hidden column longitudinal bar embedded in the concrete wall limb hidden column, characterized in that it further comprises a beam end reinforcing member, the beam end reinforcing member comprises a first longitudinal bottom plate in the form of a plate, and a stiffened double angle steel is fixed above the first longitudinal bottom plate.

[0010] The horizontal supporting plate is provided with an opening in the four corners, the longitudinal reinforcement of the hidden column is inserted into the opening, and the horizontal supporting plate and the longitudinal reinforcement of the hidden column are welded;

[0011] The second longitudinal bottom plate is embedded in the coupling beam and is located above the bottom reinforcement of the coupling beam;

[0012] One end of the beam end reinforcing member is inserted into the hidden column of the concrete wall, the other end of the beam end reinforcing member is embedded in the coupling beam, the first longitudinal bottom plate is placed on the horizontal supporting plate, and the end of the second longitudinal bottom plate is connected to the first longitudinal bottom plate.

[0013] Preferably, one end of the first longitudinal bottom plate embedded in the coupling beam protrudes out of the double-angle steel, and the end of the second longitudinal bottom plate is pressed on the first longitudinal bottom plate.

[0014] Preferably, the distance from the second longitudinal bottom plate to the bottom reinforcement of the coupling beam is not less than 50 mm.

[0015] The anti-seismic reinforced coupling beam structure bearing the concentrated force in the midspan further comprises a main beam, and the main beam is placed in the midspan of the coupling beam.

[0016] Advantages:

[0017] 1. The present application only enhances the shear bearing capacity of the beam end of the coupling beam, does not enhance the bending bearing capacity of the beam end of the coupling beam, ensures that the floor load transmitted by the main beam is smoothly transmitted to the wall, does not affect the generation of energy dissipation plastic hinge at the beam end of the coupling beam under earthquake, ensures the energy dissipation of the coupling beam, and ensures the safety of the building structure.

[0018] 2. The second longitudinal bottom plate with sufficient length is arranged in the midspan of the coupling beam, which can resist the bending moment in the midspan together with the bottom steel bars, and the bottom plate with small weight and volume is used to replace the section steel, which is more convenient to install.

[0019] 3. The components of the present application have small volume and can be placed in the gap between the hidden column of the concrete wall and the steel bars in the coupling beam, avoiding the position conflict between the whole section steel and the steel bars in the wall and the main beam, and bringing difficulties to construction.

[0020] 4. The present application is composed of a plurality of field assembly components, which reduces the weight and volume of the components, and uses the longitudinal reinforcement in the longitudinal reinforcement of the hidden column and the horizontal supporting plate as a field positioning device, which greatly reduces the installation difficulty on site.

[0021] 5. The steel consumption of the present application is less than that of the original scheme, which saves the steel consumption. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1is a structural schematic diagram of the present application;

[0023] Figure 2 is a partial structural schematic diagram of the present application;

[0024] Figure 3 is a partial structural schematic diagram of the present application;

[0025] Figure 4 is a bending moment diagram of the coupling beam when an earthquake occurs;

[0026] Figure 5 is a tension diagram of the inner part of the coupling beam when an earthquake occurs;

[0027] Figure 6 is a schematic diagram of the plastic damage range of the coupling beam without embedded beam end reinforcement when an earthquake occurs;

[0028] Figure 7 is a schematic diagram of the plastic damage range of the coupling beam with embedded beam end reinforcement when an earthquake occurs. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in combination with specific drawings.

[0030] Referring to Figure 1 , Figure 2 and Figure 3 , the anti-seismic reinforced coupling beam structure bearing the cross-mid concentrated force mainly comprises a coupling beam 2, a concrete wall limb hidden column 1 and a beam end reinforcement. The concrete wall limb hidden column 1 is located at both ends of the coupling beam 2, one end of the beam end reinforcement is embedded in the concrete wall limb hidden column 1, and the other end of the beam end reinforcement is embedded in the coupling beam 2.

[0031] The concrete wall limb hidden column 1 is embedded with hidden column longitudinal reinforcement 10 and horizontal support plate 6. The hidden column longitudinal reinforcement 10 extends vertically, and the horizontal support plate 6 is located in the horizontal direction. The horizontal support plate 6 is provided with an opening at each corner, and the hidden column longitudinal reinforcement 10 is inserted into the opening and welded between the horizontal support plate 6 and the hidden column longitudinal reinforcement 10. The horizontal support plate 6 can constrain the hidden column longitudinal reinforcement 10 so that it does not deform greatly when bearing the weight of the variable stiffness strengthening device. The middle part of the horizontal support plate 6 is preferably provided with an opening, so that the middle part of the horizontal support plate 6 is convenient for the injection of concrete mortar. According to the construction needs, the hidden column longitudinal reinforcement 10 can be added, and the opening is provided at the position corresponding to the hidden column longitudinal reinforcement 10 of the horizontal support plate 6. The hidden column longitudinal reinforcement 10 located at the four corners of the horizontal support plate 6 can not be welded between the hidden column longitudinal reinforcement 10 and the opening, and after the concrete mortar is poured, the part is filled with the concrete mortar, so that the relative position between the two is fixed. The concrete wall limb hidden column 1 is also embedded with hidden column stirrups, and the hidden column stirrups are tied on the hidden column longitudinal reinforcement 10. Preferably, 2-4 hidden column stirrups are provided between the two adjacent horizontal support plates 6. The hidden column stirrups can be used to strengthen the constraint of the hidden column longitudinal reinforcement 10.

[0032] The bottom of the coupling beam 2 is embedded with a coupling beam bottom reinforcement 7 and a second longitudinal bottom plate 8, and the second longitudinal bottom plate 8 is located above the coupling beam bottom reinforcement 7. The coupling beam bottom reinforcement 7 is located at the bottom of the coupling beam. The distance from the second longitudinal bottom plate 8 to the coupling beam bottom reinforcement 7 is not less than 50mm.

[0033] The beam-end reinforcement comprises a first longitudinal plate 5 in the shape of a plate, and a stiffened double angle 4 fixed above the first longitudinal plate 5. The first longitudinal plate 5 rests on a horizontal shelf 6, and the end of a second longitudinal plate 8 is connected to the first longitudinal plate 5. Preferably, the beam-end reinforcement extends into the concrete wall-column hidden column 1, and penetrates the node core area composed of the hidden column longitudinal reinforcement 10 and the hidden column stirrup, i.e. the end of the beam-end reinforcement extending into the concrete wall-column hidden column 1 presses at least the edge of the central opening of the horizontal shelf 6. The end face of the end of the beam-end reinforcement extending into the concrete wall-column hidden column 1 can be flush with the plane where the hidden column longitudinal reinforcement 10 farthest from the coupling beam 2 is located. The beam-end reinforcement can be provided with a vertical channel at the position opposite to the central opening of the horizontal shelf 6, so as to facilitate the pouring of concrete mortar. The width of the beam-end reinforcement can be less than the width of the horizontal shelf 6, and the horizontal shelf 6 is provided with a vertical grouting hole at the position not covered by the beam-end reinforcement, so as to facilitate the flow of concrete mortar through the grouting hole. The stiffened double angle 4 can be composed of two unequal-leg angles, which comprise a long leg arranged perpendicularly to the first longitudinal plate 5 and a short leg arranged parallel to the first longitudinal plate 5. The short legs of the two unequal-leg angles are outwardly arranged, and the long legs are arranged close to each other. Here, the long legs being arranged close to each other can mean that there is a gap between the long legs, or that there is no gap between the long legs, but preferably, there is a gap between the long legs. The gap serves as part of the vertical channel for pouring concrete mortar. The first longitudinal plate 5 is provided with a vertical through hole at the position of the gap between the long legs of the two unequal-leg angles, so as to serve as another part of the vertical channel. The short leg is provided with a first bolt hole, and the first longitudinal plate 5 is provided with a second bolt hole at the position corresponding to the first bolt hole, so as to be fixed to the stiffened double angle 4 through a bolt. Preferably, the stiffened double angle 4 is provided with a first bolt hole on the portion arranged in the coupling beam 2, and is not provided with a first bolt hole on the portion arranged in the concrete wall-column hidden column 1. The first bolt holes are preferably arranged at equal intervals. Further preferably, the short leg of the unequal-leg angle is provided with five first bolt holes. The diameter of the first bolt hole and the second bolt hole is 2 mm-3 mm larger than the outer diameter of the screw rod of the bolt 9 inserted therein. The bottom of the first longitudinal plate 5 can be provided with a support leg, which is arranged to abut against the horizontal shelf 6. The support leg can increase the distance between the first longitudinal plate 5 and the horizontal shelf 6, so as to facilitate the flow of concrete mortar downwardly through the gap between the first longitudinal plate 5 and the horizontal shelf 6. Preferably, the width of the first longitudinal plate 5 is not greater than the outer diameter of the central hole of the horizontal shelf 6, so as to ensure that the gap between the first longitudinal plate 5 and the horizontal shelf 6 is large enough. Further preferably, the width of the first longitudinal plate 5 is equal to the outer diameter of the central hole of the horizontal shelf 6.

[0034] Yes, the length of the part of the first longitudinal bottom plate 5 embedded in the coupling beam 2 is 0.7-1.0 times the height of the coupling beam 2. The end of the first longitudinal bottom plate 5 embedded in the coupling beam 2 protrudes outside the stiffened double angle steel 4. The end of the second longitudinal bottom plate 8 is pressed on the first longitudinal bottom plate 5 and is fixed by bolts. The second longitudinal bottom plate 8 is provided with a fourth bolt hole at the position corresponding to the third bolt hole. Preferably, the thickness of the first longitudinal bottom plate 5 is 6-12 mm thicker than that of the second longitudinal bottom plate 8. The first longitudinal bottom plate 5 is used for shear resistance, and the second longitudinal bottom plate 8 is used for bending resistance. There is a gap between the second longitudinal bottom plate 8 and the stiffened double angle steel 4. Preferably, the distance between the end face of the end of the stiffened double angle steel 4 embedded in the coupling beam 2 and the end face of the end of the first longitudinal bottom plate 5 embedded in the coupling beam 2 is 200 mm±3 mm. The length of the stiffened double angle steel 4 can be less than the length of the first longitudinal bottom plate 5, and the end of the first longitudinal bottom plate 5 embedded in the concrete wall limb hidden column 1 is flush with the end of the stiffened double angle steel 4 embedded in the concrete wall limb hidden column 1. The end face of the end of the first longitudinal bottom plate 5 embedded in the coupling beam 2 protruding outside the stiffened double angle steel 4 is provided with a third bolt hole. The third bolt hole is preferably four, and the four third bolt holes are divided into two groups. There can be a hidden column stirrup at the top of the stiffened double angle steel 4, thereby limiting the position of the beam end reinforcement.

[0035] The anti-seismic reinforced coupling beam structure bearing the concentrated force at the mid-span further comprises a main beam 3 resting at the mid-span of the coupling beam 2. The bolts in the present application are preferably pressure-bearing bolts.

[0036] Comparison Figure 4 And Figure 5 It can be seen that, due to the existence of relatively "loose" connection in the present application, the shear segment and the bending segment of the beam end reinforcement do not form a continuous tensile member with sufficient anchoring segment; when an earthquake occurs, the beam end bending moment generated by the earthquake is resisted by the tensile force generated by the beam end bottom reinforcement, and due to the insufficient effective anchoring length of the shear segment, the tensile force value generated under the earthquake is very small, so the shear segment has little effect on resisting the beam end bending moment.

[0037] Comparison Figure 6 And Figure 7 It can be seen that, when an earthquake occurs, the range and degree of plastic damage at the beam end of the coupling beam are not much different. This proves that after the embedding of the reinforcing device, the increase in the mid-span bending resistance and the beam end shear resistance does not affect the formation of plastic hinges at the beam end of the coupling beam, and proves that the reinforcing device does not affect the energy dissipation of the coupling beam.

[0038] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A seismically reinforced coupling beam structure for bearing mid-span concentrated forces, comprising a coupling beam and concrete wall columns at both ends of the coupling beam, wherein coupling beam bottom reinforcement is embedded in the bottom of the coupling beam, and wherein longitudinal reinforcement is embedded in the concrete wall columns, and wherein: It also includes a beam end reinforcement, the beam end reinforcement including a first longitudinal bottom plate in a plate shape, and a stiffening double angle steel is fixed on the top of the first longitudinal bottom plate; A horizontal support plate is also embedded in the concrete wall limb hidden column, and openings are opened on the four corners of the horizontal support plate. The hidden column longitudinal reinforcement is passed through the openings, and the horizontal support plate and the hidden column longitudinal reinforcement are welded; A second longitudinal bottom plate is embedded in the connecting beam, and the second longitudinal bottom plate is located above the bottom reinforcement of the connecting beam; One end of the beam end reinforcement is inserted into the concrete wall limb hidden column, and the other end of the beam end reinforcement is buried in the connecting beam. The first longitudinal bottom plate is placed on the horizontal supporting plate, and the end of the second longitudinal bottom plate is connected to the first longitudinal bottom plate. It also includes a main beam, which is placed in the middle of the span of the coupling beam.

2. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 1, characterized in that: One end of the first longitudinal bottom plate embedded in the connecting beam extends out of the reinforcing double angle steel, and the end of the second longitudinal bottom plate is pressed onto the first longitudinal bottom plate.

3. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 1, characterized in that: The distance from the second longitudinal bottom plate to the bottom reinforcement of the connecting beam is not less than 50 mm.

4. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 1, characterized in that: The reinforced double angle steel and the first longitudinal base plate are used to resist shear; the second longitudinal base plate is used to resist bending.

5. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 4, characterized in that: The beam end reinforcement extends into the core area of ​​the node composed of the hidden column longitudinal reinforcement and hidden column stirrups.

6. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 1, characterized in that: The reinforced double angle steel is composed of two unequal-leg angle steels, which include a long leg placed perpendicular to the first longitudinal bottom plate and a short leg placed parallel to the first longitudinal bottom plate. The short legs of the two unequal-leg angle steels face outward, the long legs are close together, and there is a gap between the two long legs.

7. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 6, characterized in that: A first bolt hole is opened on the short limb, a second bolt hole is opened on the first longitudinal bottom plate at a position corresponding to the first bolt hole, and the reinforced double angle steel and the first longitudinal bottom plate are fixed by bolts.

8. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 7, characterized in that: The hole diameters of the first bolt hole and the second bolt hole are 2 mm to 3 mm larger than the outer diameters of the screw rods of the bolts inserted therein.

9. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 1, characterized in that: The width of the first longitudinal bottom plate is not greater than the outer diameter of the central hole of the horizontal supporting plate.

10. The earthquake-resistant reinforced coupling beam structure for bearing mid-span concentrated forces according to claim 1, characterized in that: The length of the portion of the first longitudinal bottom plate embedded in the connecting beam is 0.7 to 1.0 times the height of the connecting beam.

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