A prefabricated low-rise and multi-story vibration-damping building structure system

Abstract

This invention relates to the field of building construction technology and discloses a prefabricated low-rise and multi-story seismic-damping building structure system, including prefabricated floor slabs, prefabricated shear walls, and dampers. The prefabricated shear walls intersect longitudinally and transversely to form a vertical support frame supporting the prefabricated floor slabs. Multiple transverse prefabricated shear walls are arranged, while longitudinal prefabricated shear walls are only located at the exterior wall positions. The prefabricated floor slabs are erected on the corbels of the lower-level prefabricated shear walls and are fixed by pre-embedded anchor bolts. Dampers are spaced out at the joints between the prefabricated floor slabs and the lower-level transverse prefabricated shear walls, dissipating seismic energy through friction. This invention has a simple structure and ingenious design. Multiple transverse prefabricated shear walls are arranged to bear vertical loads and resist transverse horizontal seismic forces. Only longitudinal exterior wall panels are provided, and dampers are added at the connection points between the transverse prefabricated shear walls and the prefabricated floor slabs to dissipate seismic energy. This improves the seismic performance of the building and provides a large, flexible longitudinal layout.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a prefabricated low-rise and multi-story vibration-damping building structure system. Background Technology

[0002] Low-rise and multi-story prefabricated concrete shear wall structure houses can replace old rural clay brick masonry houses for new rural construction. On the one hand, they can improve quality and efficiency, and on the other hand, they can reduce labor, resource and energy waste, which is in line with the policy of energy conservation and emission reduction and the policy of protecting arable land.

[0003] The key to low-rise and multi-story prefabricated concrete shear wall structures lies in the design of connection nodes. Currently, there are two main types of connection node methods: wet connections and dry connections. Common wet connection methods include sleeve grouting connections and post-cast strip connections; common dry connection methods include welding connections and bolted connections.

[0004] Horizontal joints are connected using sleeve grouting, while vertical joints are connected using post-cast strips. The advantages of this method are high strength from the sleeve grouting connection and the ability of the post-cast strip connection to make the structure equivalent to cast-in-place concrete. However, it also presents challenges such as expensive sleeves, difficult grouting construction, and difficulty in quality control. This connection method is more suitable for high-rise buildings and large projects with professional construction teams; using it for low-rise or multi-story buildings would be overkill.

[0005] Welded connections avoid concrete pouring during component assembly, resulting in less construction waste and less environmental impact. However, they also have disadvantages such as difficulty in controlling weld quality and poor joint ductility. Bolted connections connect prefabricated components by installing bolts at the connection points. Bolted connections have advantages such as simple operation, wide applicability, short construction period, simple process, and controllable quality. In northern regions, for example, a 200mm thick wall panel, after adding bolted connection components, the local wall thickness is only 80mm. Without local reinforcement, there is a safety hazard. If local reinforcement is done, there is a large "protrusion" at the bolted connection, which causes inconvenience and increases costs for decoration. Bolted connections require high installation precision, significantly reduce wall thickness, have poor seismic performance, and low safety reserve under strong earthquakes.

[0006] Therefore, how to construct low-rise and multi-story prefabricated concrete shear wall structure houses in areas with high seismic fortification intensity has become an urgent technical problem to be solved. Summary of the Invention

[0007] The purpose of this invention is to propose a prefabricated low-rise and multi-story vibration-damping building structure system to solve the technical problems described in the background art.

[0008] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0009] A prefabricated low-rise and multi-story vibration-damping building structure system includes prefabricated floor slabs, prefabricated shear walls and dampers. The prefabricated shear walls are designed to cross longitudinally and transversely to form a vertical support frame that supports the prefabricated floor slabs. Multiple transverse prefabricated shear walls are provided, while longitudinal prefabricated shear walls are only provided at the exterior wall position.

[0010] The precast shear wall has a cavity at the bottom, and grouting holes and venting holes are provided on the outer wall of the cavity. U-shaped reserved ring bars are provided in the cavity. U-shaped reserved ring bars are reserved at the top of the precast shear wall. A corbel is provided at the top of the transverse precast shear wall, and pre-embedded anchor bolts are provided on the corbel.

[0011] The upper precast shear wall is erected on the lower precast shear wall. The reserved ring reinforcement at the top of the lower precast shear wall extends into the cavity at the bottom of the upper precast shear wall, and the two precast shear walls are solidified into one by the concrete poured into the cavity.

[0012] The precast floor slab is erected on the corbel of the lower precast shear wall. The pre-embedded anchor bolts pass through the bolt holes opened in the precast floor slab and tie and fix the precast floor slab to the corbel.

[0013] The dampers are spaced apart at the joint between the precast floor slab and the lower transverse precast shear wall, and the friction of the dampers dissipates the seismic force.

[0014] Preferably, the damper includes an attachment seat, a damping plate, a friction plate, and a rotating shaft. The attachment seat is attached to and fixed on a precast floor slab or a transverse precast shear wall. One end of the damping plate is hinged to an ear plate on one of the attachment seats via the rotating shaft, and the other end is hinged to a damping plate on another attachment seat via the rotating shaft. A friction plate is fixed at the overlapping part of the two hinged damping plates.

[0015] Preferably, the top of the transverse precast shear wall is provided with a tie hole, and a tie anchor with an outer PVC pipe is inserted into the tie hole. The attachment seat of the damper on the side near the precast shear wall is fixed to the precast shear wall by the tie anchor, and the attachment seat of the damper on the side near the precast floor slab is fixed to the precast floor slab by expansion bolts.

[0016] Preferably, a gap is left between the precast floor slab and the precast shear wall, and the gap between the precast floor slab and the precast shear wall is sealed tightly with a flexible waterproof material.

[0017] Preferably, the diameter of the bolt hole is larger than the diameter of the pre-embedded anchor bolt, and the gap between the top opening of the bolt hole and the pre-embedded anchor bolt is sealed with a flexible waterproof material.

[0018] Preferably, the hollow cavity in the middle of the precast floor slab is filled with lightweight thermal insulation material, the total thickness of the precast floor slab is not less than 1 / 30 of the span and not less than 150mm, the thickness of the upper and lower flange concrete is not less than 50mm, the ends are solid structures, and the length of the solid end section is not less than 500mm.

[0019] Preferably, in seismic fortification intensity VI zone, the damper spacing is no greater than 1500mm; in seismic fortification intensity VII zone, the damper spacing is no greater than 1200mm; and in seismic fortification intensity VIII zone, the damper spacing is no greater than 1000mm.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has a simple structure and ingenious design. The building is equipped with multiple prefabricated shear walls in the horizontal direction to bear vertical loads and resist horizontal seismic forces. The building is equipped with only longitudinal exterior wall panels in the longitudinal direction. By adding dampers at the connection nodes between the transverse prefabricated shear walls and the prefabricated floor slabs, the seismic energy is dissipated. This not only improves the seismic performance of the building, but also provides a large space for flexible longitudinal layout, making it more widely applicable. It can be used in areas with high seismic fortification intensity. Moreover, the wall panel connection nodes of the present invention do not weaken the wall structure. The connecting bolts and nuts at the surface of the prefabricated floor slabs can be covered by the finishing layer. The dampers and corbels can be hidden in the ceiling, without affecting the usable space and the appearance of the building. Attached Figure Description

[0021] The above and / or other aspects and advantages of the present invention will become clearer and more readily understood through the following detailed description taken in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein:

[0022] Figure 1 This is a plan view of the present invention;

[0023] Figure 2 This is a schematic diagram of the elevation structure of the present invention;

[0024] Figure 3 This is a structural schematic diagram of the connection node between the precast floor slab and the transverse precast shear wall of the present invention;

[0025] Figure 4 This is a schematic diagram of the exploded structure of the damper of the present invention.

[0026] Reference numerals: 1. Precast floor slab; 101. Hollow cavity; 102. Flange; 103. Lightweight insulation material; 104. End; 105. Bolt hole; 2. Precast shear wall; 201. Corbel; 202. Embedded anchor bolt; 203. Cavity; 204. Reserved ring reinforcement; 205. Grouting hole; 206. Vent hole; 207. Tie hole; 3. Damper; 301. Attachment seat; 302. Damping plate; 303. Friction plate; 304. Rotating shaft; 4. Tie bolt; 5. PVC pipe; 6. Flexible waterproof material. Detailed Implementation

[0027] In the following description, an embodiment of a prefabricated low-rise and multi-story vibration-damping building structure system according to the present invention will be described with reference to the accompanying drawings. The embodiments described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation or scope of the invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0028] In the description of this invention, it should be noted that the terms "front," "rear," "left," "right," "top," "bottom," "upper," "lower," "inner," "outer," "horizontal," and "vertical," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] The accompanying drawings in this specification are schematic diagrams to aid in illustrating the concept of the invention, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly demonstrate the structure of the components in the embodiments of the invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of the invention. The following description, in conjunction with... Figure 1-4 The preferred embodiments of the present invention will be described in further detail below:

[0031] like Figure 1-3As shown, a preferred prefabricated low-rise and multi-story vibration-damping building structure system of the present invention includes a prefabricated floor slab 1, a prefabricated shear wall 2 and a damper 3. The prefabricated shear wall 2 is designed to form a vertical support frame supporting the prefabricated floor slab 1 by crossing the longitudinal and transverse directions. Multiple transverse prefabricated shear walls 2 are provided, while longitudinal prefabricated shear walls 2 are only provided at the outer wall position.

[0032] The precast shear wall 2 has a cavity 203 at the bottom, and grouting holes 205 and venting holes 206 are provided on the outer wall of the cavity 203. U-shaped reserved ring bars 204 are provided in the cavity 203. U-shaped reserved ring bars 204 are reserved at the top of the precast shear wall 2. A corbel 201 is provided at the top of the transverse precast shear wall 2, and pre-embedded anchor bolts 202 are provided on the corbel 201.

[0033] The upper precast shear wall 2 is erected on the lower precast shear wall 2. The reserved ring reinforcement 204 at the top of the lower precast shear wall 2 extends into the cavity 203 at the bottom of the upper precast shear wall 2, and the two precast shear walls 2 are solidified into one by the concrete poured into the cavity 203.

[0034] The precast floor slab 1 is erected on the corbel 201 of the lower precast shear wall 2. A gap is left between the precast floor slab 1 and the precast shear wall 2, and the gap between the precast floor slab 1 and the precast shear wall 2 is sealed tightly by a flexible waterproof material 6 (such as waterproof sealant). The pre-embedded anchor bolt 202 passes through the precast floor slab 1 through the bolt hole 105 opened on the precast floor slab 1 and fixes the precast floor slab 1 to the corbel 201. The diameter of the bolt hole 105 is larger than the diameter of the anchor rod of the pre-embedded anchor bolt 202, and the gap between the top opening of the bolt hole 105 and the pre-embedded anchor bolt 202 is sealed by a flexible waterproof material 6 (such as waterproof sealant).

[0035] like Figure 4As shown, the dampers 3 are spaced apart at the joint between the precast floor slab 1 and the lower transverse precast shear wall 2. The dampers 3 dissipate seismic capacity through friction. Each damper 3 includes an attachment seat 301, a damping plate 302, a friction plate 303, and a rotating shaft 304. The attachment seat 301 is attached to and fixed on the precast floor slab 1 or the transverse precast shear wall 2. One end of the damping plate 302 is hinged to an ear plate on one of the attachment seats 301 via the rotating shaft 304. One end of the damper 3 is hinged to a damping plate 302 hinged to another attachment seat 301 via a pivot 304, and a friction plate 303 is fixed at the overlapping part of the two hinged damping plates 302. A tie hole 207 is provided through the top of the transverse precast shear wall 2, and a tie bolt 4 with an outer PVC pipe 5 is inserted into the tie hole 207. The attachment seat 301 of the damper 3 near the precast shear wall 2 is fixed to the precast shear wall 2 by the tie bolt 4. Furthermore, the attachment seat 301 of the damper 3 near the precast floor slab 1 is fixed to the precast floor slab 1 by expansion bolts. The dampers 3 installed on both sides of the transverse precast shear wall 2 are effectively linked by the tie bolts 4. The deformation of the tie bolts 4 absorbs the seismic capacity, so that the damper 3 cannot absorb the instantaneous seismic capacity, which would cause structural damage to the precast floor slab 1 and the precast shear wall 2 at the installation position due to the seismic impact. After the earthquake, the deformed tie bolts 4 can be removed and replaced with new tie bolts 4 for reuse. Of course, in actual use, the number of friction surfaces can be adjusted by increasing or decreasing the number of damping plates 302 according to different factors such as the number of building floors, seismic fortification intensity, and seismic fortification classification, thereby adjusting the energy dissipation capacity of the damper 3. Similarly, the number of tie bolts 4 can also be reasonably selected according to different needs to ensure that the tie bolts 4 and the damper 3 form an effective linkage.

[0036] The specific construction process of this invention is as follows:

[0037] First, the cast-in-place foundation is constructed, and at the same time, ring-shaped steel bars are pre-embedded in the foundation to ensure that the first layer of precast shear wall 2 is fixed in place on the foundation.

[0038] After the cast-in-place foundation reaches the design strength, the first-floor precast shear wall 2 will be hoisted and constructed. The precast shear wall 2 is manufactured in the factory and transported to the site. It is connected to the precast ring reinforcement on the foundation through the cavity 203 reserved at the bottom of the precast shear wall 2. Concrete is poured into the cavity 203 through the grouting hole 205 and the vent hole 206 to achieve the consolidation of the precast shear wall 2.

[0039] After completing the installation of the first-floor precast shear wall 2 according to the above steps, and once the concrete in the cavity 203 reaches the required strength, the precast floor slab 1 is hoisted and installed at the top corbel 201 of the precast shear wall 2. It is connected to the pre-embedded anchor bolts 23 of the corbel 201 through the pre-reserved bolt holes 105 on the slab edge. The precast floor slab 1 is a precast hollow slab, with its central hollow cavity 101 filled with lightweight insulation material 103 (such as extruded polystyrene board). The total thickness of the precast floor slab 1 is not less than 1 / 30 of the span and not less than 150mm. The concrete thickness of the upper and lower flanges 102 is not less than 50mm. This reduces the self-weight of the component and increases the lever arm, fully utilizing the bending resistance of the component. The end 104 of the precast floor slab 1 is a solid structure, and the length of the solid section of the end 104 is not less than 500mm. This effectively strengthens the node stiffness and forms a strong node with the wall panel. The conventional slab thickness is generally not less than 1 / 40 of the span for two-way slabs and not less than 1 / 35 of the span for one-way slabs, and not less than 100mm. Without this, the above advantages are not available. A gap is left between the side of the precast floor slab 1 and the precast shear wall 2. The gap is filled with flexible waterproof material 6 (such as waterproof sealant). The gap allows the slab to have a certain displacement capacity under seismic action, while the pre-embedded anchor bolts 202 limit excessive displacement and prevent the precast floor slab 1 from falling off. In the seismic fortification intensity VI zone, the damper 3 is installed at a spacing of not more than 1500mm. In the seismic fortification intensity VII zone, the damper 3 is installed at a spacing of not more than 1200mm. In the seismic fortification intensity VIII zone, the damper 3 is installed at a spacing of not more than 1000mm.

[0040] After the precast floor slab 1 and the precast shear wall 2 are fixed, the damper 3 is connected. The damper 3 is only installed in the longitudinal direction of the building. One end of the damper 3 is connected to the tie bolt 4 of the precast shear wall 2’s outer PVC pipe 5 through an attachment seat 301, and the other end is connected to the bottom of the precast floor slab 1 through another attachment seat 301. In order to avoid installation errors, the attachment seat 301 at the bottom of the precast floor slab 1 is fixed by installing expansion bolts later.

[0041] Afterwards, follow the above steps to complete the installation of the precast shear wall 2, precast floor slab 1, and damper 3 for the subsequent floors;

[0042] During the renovation, a dry construction method is used for the floor, and the bolts and nuts of the pre-embedded anchors 202 that extend beyond the surface of the precast floor slab 1 are covered within the finished surface layer. Meanwhile, the damper 3 at the bottom of the node can be hidden in the ceiling for easy inspection and replacement.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated low-rise and multi-story vibration-damping building structure system, characterized in that: It includes a precast floor slab (1), a precast shear wall (2) and a damper (3). The precast shear wall (2) is designed to cross the longitudinal and transverse directions to form a vertical support frame for supporting the precast floor slab (1). Multiple transverse precast shear walls (2) are provided, while longitudinal precast shear walls (2) are only provided at the outer wall position. The precast shear wall (2) has a cavity (203) at the bottom. Grouting holes (205) and venting holes (206) are provided on the outer wall of the cavity (203). U-shaped reserved ring bars (204) are provided in the cavity (203). U-shaped reserved ring bars (204) are reserved at the top of the precast shear wall (2). A corbel (201) is provided at the top of the transverse precast shear wall (2). An embedded anchor bolt (202) is provided on the corbel (201). The upper precast shear wall (2) is erected on the lower precast shear wall (2). The U-shaped reserved ring reinforcement (204) at the top of the lower precast shear wall (2) extends into the cavity (203) at the bottom of the upper precast shear wall (2). The upper and lower precast shear walls (2) are solidified into one by the concrete poured into the cavity (203). The precast floor slab (1) is erected on the corbel (201) of the lower precast shear wall (2). The pre-embedded anchor bolt (202) passes through the bolt hole (105) opened on the precast floor slab (1) and fixes the precast floor slab (1) to the corbel (201). The dampers (3) are spaced out at the joint between the precast floor slab (1) and the lower transverse precast shear wall (2), and the earthquake capacity is consumed by the friction of the dampers (3). The damper (3) includes an attachment seat (301), a damping plate (302), a friction plate (303), and a rotating shaft (304). The attachment seat (301) is attached to and fixed on the precast floor slab (1) or the transverse precast shear wall (2). One end of the damping plate (302) is hinged to the ear plate on one of the attachment seats (301) through the rotating shaft (304), and the other end is hinged to the damping plate (302) on another attachment seat (301) through the rotating shaft (304). The friction plate (303) is fixed at the overlapping part of the two hinged damping plates (302). The top of the transverse precast shear wall (2) is provided with a tie hole (207), and a tie anchor (4) with an outer PVC pipe (5) is inserted into the tie hole (207). The attachment seat (301) of the damper (3) near the precast shear wall (2) is fixed to the precast shear wall (2) by the tie anchor (4), and the attachment seat (301) of the damper (3) near the precast floor slab (1) is fixed to the precast floor slab (1) by the expansion bolt.

2. The prefabricated low-rise and multi-story vibration-damping building structure system according to claim 1, characterized in that: There is a gap between the precast floor slab (1) and the precast shear wall (2), and the gap between the precast floor slab (1) and the precast shear wall (2) is sealed tightly by a flexible waterproof material (6).

3. The prefabricated low-rise and multi-story vibration-damping building structure system according to claim 1, characterized in that: The diameter of the bolt hole (105) is larger than the diameter of the anchor rod of the pre-embedded anchor bolt (202), and the gap between the top opening of the bolt hole (105) and the pre-embedded anchor bolt (202) is sealed by a flexible waterproof material (6).

4. The prefabricated low-rise and multi-story vibration-damping building structure system according to claim 1, characterized in that: The hollow cavity (101) in the middle of the precast floor slab (1) is filled with lightweight thermal insulation material (103). The total thickness of the precast floor slab (1) is not less than 1 / 30 of the span and not less than 150mm. The concrete thickness of the upper and lower flanges (102) is not less than 50mm. The end (104) is a solid structure and the length of the solid section of the end (104) is not less than 500mm.

5. The prefabricated low-rise and multi-story vibration-damping building structure system according to claim 1, characterized in that: In the seismic fortification intensity VI zone, the damper (3) is installed at a spacing of no more than 1500mm; in the seismic fortification intensity VII zone, the damper (3) is installed at a spacing of no more than 1200mm; and in the seismic fortification intensity VIII zone, the damper (3) is installed at a spacing of no more than 1000mm.

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