Prefabricated ECC reinforcing part for seismic reinforcement of RC frame column

Abstract

The utility model relates to a prefabricated ECC reinforcing piece for seismic reinforcement of an RC frame column. The prefabricated ECC reinforcing piece comprises a plurality of prefabricated ECC plates and a pre-fixing assembly used for pre-fixing the prefabricated ECC plates. The pre-fixing assembly comprises a horizontal stirrup and a connecting sleeve used for connecting the two ends of the stirrup. A groove for placing a stirrup is formed in one side, deviating from the frame column, of the prefabricated ECC plate; an adhesive layer is arranged between the prefabricated ECC plate and the frame column, and the width of the prefabricated ECC plate is the same as that of the frame column. According to the utility model, the RC frame column is stably and reliably reinforced through the prefabricated ECC reinforcing member which is simple to construct and reliable in structure.

Description

Technical Field

[0001] This utility model relates to the field of seismic reinforcement of frame columns, specifically to a prefabricated ECC reinforcement component for seismic reinforcement of RC frame columns. Background Technology

[0002] Existing seismic reinforcement methods for frame columns generally employ the method of increasing the cross-section based on steel plates or ordinary concrete. However, the cost of steel plate reinforcement is too high, making it difficult to promote on a large scale. Moreover, if not properly protected, steel plates are prone to corrosion, reducing the reinforcement effect, especially in humid environments or coastal areas where steel plates are more susceptible to corrosion. The construction period for reinforcement using ordinary concrete materials is long, and when reinforcing old residential buildings, residents need to be moved out during the construction period, which increases the overall reinforcement and renovation cost.

[0003] Currently, there is a prefabricated high-strength stainless steel stranded mesh reinforced ECC component for strengthening RC columns. This component includes a prefabricated high-strength stainless steel stranded mesh reinforced ECC plate assembly, which includes a prefabricated prestressed high-strength stainless steel stranded mesh reinforced ECC plate and a prefabricated pre-drilled channel ECC plate. High-strength stainless steel stranded mesh is fixed in the prefabricated prestressed high-strength stainless steel stranded mesh reinforced ECC plate. The prefabricated pre-drilled channel ECC plate is connected to transverse steel strands. The high-strength stainless steel stranded mesh is longitudinally connected to an anchor fixing device and is pre-tightened both transversely and longitudinally. An ECC post-pouring strip is used to fill the gap after the prefabricated high-strength stainless steel stranded mesh reinforced ECC plate assembly is installed to counteract residual stress. An ECC plate fixing device is used to fix the prefabricated high-strength stainless steel stranded mesh reinforced ECC plate assembly to the circumference of the RC column.

[0004] Existing reinforcement structures are too complex and difficult to construct on-site; there is an urgent need to provide a reinforcement structure that is simple in structure and stable after reinforcement. Utility Model Content

[0005] Based on the above description, this utility model provides a prefabricated ECC reinforcement component for seismic reinforcement of RC frame columns. The prefabricated ECC reinforcement component, which is simple to construct and has a reliable structure, can stably and reliably reinforce the RC frame columns.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a prefabricated ECC reinforcement component for seismic reinforcement of RC frame columns, comprising multiple prefabricated ECC plates and a pre-fixing component for pre-fixing the prefabricated ECC plates;

[0007] The pre-fixing assembly includes horizontally arranged stirrups and connecting sleeves for connecting the two ends of the stirrups;

[0008] The precast ECC slab has a groove for placing stirrups on the side away from the frame column.

[0009] The adhesion layer is arranged between the prefabricated ECC plate and the frame column, and the width of the prefabricated ECC plate is the same as the width of the frame column.

[0010] Through the technical scheme, the connecting sleeve is used for connecting two ends of the stirrup together, so that the stirrup forms a closed ring structure, and the stirrup of the ring structure tightly encircles the prefabricated ECC plate on the outer side of the frame column; in cooperation with the adhesion layer, the connection between the prefabricated ECC plate and the frame column is more stable and firm; the construction is simple and fast, and the structure is reliable and stable; and the effect of stabilizing and reinforcing can be achieved.

[0011] Based on the technical scheme, the utility model further can make improvement as follows.

[0012] Further, the stirrup is uniformly provided with a plurality of in the vertical direction.

[0013] Through the technical scheme, the prefabricated ECC plate is encircled on the frame column from multiple positions by the multiple stirrups, and the multiple stirrups are arranged, so that the force applied to the prefabricated ECC plate is more uniform, and the force received by the frame column is better dispersed to the prefabricated ECC plate.

[0014] Further, the two ends of the stirrup are provided with external threads of the same rotation direction, and the connecting sleeve is provided with internal threads matched with the external threads.

[0015] Further, the cross section of the groove is U-shaped, and the size is matched with the stirrup.

[0016] Further, when the thickness of the prefabricated ECC plate is t, the depth of the groove is less than t / 2, and the diameter of the stirrup is less than the depth of the groove.

[0017] Further, the adhesion vertical strips are arranged between opposite sides of adjacent prefabricated ECC plates.

[0018] It should be understood that the adhesion vertical strips and the adhesion layer adopt the same material, and can achieve the purpose of bonding the sides of adjacent prefabricated ECC plates together.

[0019] Further, the side of the prefabricated ECC plate facing the frame column is provided with a frictional pattern.

[0020] Through the technical scheme, the frictional pattern is used for increasing the contact area of the prefabricated ECC plate and the adhesion layer, so as to increase the connection firmness degree of the adhesion layer and the prefabricated ECC plate.

[0021] Further, the two ends of the stirrup are both provided with connecting ends, and connecting holes are arranged on the two connecting ends.

[0022] The connecting sleeve is provided with two groups of positioning perforations and positioning threaded holes, each group of the positioning perforations is coaxially arranged with the positioning threaded hole, positioning bolts are arranged in the connecting hole, the positioning perforation and the positioning threaded hole, and the positioning bolts are threadedly connected with the positioning threaded hole.

[0023] Through the above technical scheme, the positioning bolts penetrate the connecting hole, the positioning perforation and the positioning threaded hole, so that the connecting sleeve and the stirrup can be stably connected together.

[0024] Further, the groove is upwardly and obliquely arranged away from the frame column.

[0025] Further, the adhesive layer is a modified epoxy resin structural adhesive layer.

[0026] Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:

[0027] 1. The stirrup and the connecting sleeve form a complete ring, so that the prefabricated ECC plate can be stably and fixedly fixed to the outer side of the frame column, and then, in cooperation with the adhesive layer, the prefabricated ECC plate can be stably and fixedly fixed to the outer side of the frame column, thereby achieving convenient construction and stable and reliable structure.

[0028] 2. The groove on the prefabricated ECC plate is used for positioning and limiting the position of the stirrup, so as to place the stirrup during construction. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Fig. 1 is a schematic view of the overall structure of a prefabricated ECC reinforcing member for RC frame column seismic reinforcement according to Embodiment 1 of the present application;

[0030] Figure 2 Fig. 2 is a top view of the prefabricated ECC reinforcing member for RC frame column seismic reinforcement according to Embodiment 1 of the present application;

[0031] Figure 3 Fig. 3 is a side elevation view of the prefabricated ECC reinforcing member for RC frame column seismic reinforcement according to Embodiment 1 of the present application;

[0032] Figure 4 Fig. 4 is an enlarged view of A of Fig. 1; Figure 3

[0033] Figure 5 Fig. 5 is a schematic view of the connection relationship between the stirrup and the connecting sleeve of the prefabricated ECC reinforcing member for RC frame column seismic reinforcement according to Embodiment 2 of the present application;

[0034] Figure 6 Fig. 6 is a schematic view of the groove and the stirrup cooperation relationship of the prefabricated ECC reinforcing member for RC frame column seismic reinforcement according to Embodiment 3 of the present application.

[0035] ​Reference signs:

[0036] 1. A precast ECC panel;

[0037] 21. Stirrup; 22. Connection sleeve;

[0038] 3. Groove; 4. Adhesive layer; 5. Easy-turn section; 6. Adhesive vertical strip; 7. Frictional texture;

[0039] 8. Connection end; 9. Connection hole; 10. Positioning perforation; 11. Positioning threaded hole; 12. Frame column; 13. Positioning bolt. DETAILED DESCRIPTION

[0040] For the purpose of facilitating the understanding of the present application, a more complete description of the present application will be provided below with reference to the relevant drawings. The drawings show embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0042] ECC (Engineered Cementitious Composite), i.e. engineered cementitious composite, is a high-performance fiber-reinforced cementitious composite material, which is known for its superior mechanical properties and crack control ability. The design of ECC material emphasizes ductility performance, and its compressive strength is usually between 30-80 MPa, which can meet the needs of most engineering applications. The precast ECC panel has high ductility, which exhibits tensile strain hardening behavior, and the ultimate tensile strain can reach several hundred times that of ordinary concrete. When the precast ECC panel is stretched, it will form dense and uniform distribution of micro-cracks, rather than a single through crack, and the crack width is usually less than 100 microns. Due to the uniform distribution of micro-cracks, the precast ECC panel has excellent crack resistance, and can maintain the integrity of the structure even under large strain. The precast ECC panel has high toughness, and its impact resistance and energy dissipation capacity are much higher than those of traditional concrete, which exhibits excellent bending toughness and bending resistance, especially under extreme loads or seismic action. The precast ECC panel has superior durability, showing good impermeability, freeze-thaw resistance and chemical corrosion resistance, and the cost is moderate, which is suitable for building structure seismic reinforcement and reconstruction engineering applications in harsh environments.

[0043] Example 1:

[0044] Reference Figures 1-4The utility model provides a prefabricated ECC reinforcing piece for RC frame column aseismatic reinforcement, including a plurality of prefabricated ECC board 1 and the prefabricated assembly for prefabricating prefabricated ECC board 1, and prefabricated assembly includes the stirrup 21 of horizontal arrangement and the connecting sleeve 22 for connecting the both ends of stirrup 21, when frame column 12 is four prism, and the number of prefabricated ECC board 1 is four, i.e.

[0045] The side of prefabricated ECC board 1 away from frame column 12 is provided with a groove 3 for placing the stirrup 21, the cross section of the groove 3 is U-shaped, and the size is matched with the stirrup 21, and the stirrup 21 is uniformly provided with a plurality of stirrups in the vertical direction; when the thickness of the prefabricated ECC board 1 is t, the depth of the groove 3 is less than t / 2, and the diameter of the stirrup 21 is less than the depth of the groove 3.

[0046] The prefabricated ECC board 1 and the frame column 12 are provided with an adhesive layer 4, and the width of the prefabricated ECC board 1 is the same as the width of the frame column 12. The plurality of stirrups 21 are used to stably hoop the prefabricated ECC board 1 to the frame column 12, the force exerted by the stirrups 21 on the prefabricated ECC board 1 is uniformly distributed, and the prefabricated ECC board 1 can be firmly and stably fixed to the frame column 12 by cooperating with the adhesive layer 4, so that the prefabricated ECC board 1 can better reinforce the frame column 12.

[0047] Reference Figure 3 And 4 The both ends of the stirrup 21 are provided with external threads of the same rotation direction, and the connecting sleeve 22 is provided with internal threads matched with the external threads; the outer side of the connecting sleeve 22 is provided with a easy-to-turn section 5 facilitating rotation of the connecting sleeve 22 itself, and the cross section of the easy-to-turn section 5 is square or regular hexagonal; the side of the prefabricated ECC board 1 facing the frame column 12 is provided with friction lines 7, and the adhesive layer 4 is a fast-hardening and early-strength concrete layer; adjacent opposite sides of the prefabricated ECC board 1 are provided with adhesive vertical strips 6 for connecting two adjacent prefabricated ECC boards.

[0048] Construction method:

[0049] First, the stirrup 21 is hooped to the frame column 12, the appropriate length is cut in the factory according to the size of the frame column 12, and the external threads at both ends of the stirrup 21 are machined;

[0050] Then, the connecting sleeve 22 is sleeved on the external threads at both ends of the stirrup 21 by using a threaded steel bending tool to bend at the construction site;

[0051] Then, the prefabricated ECC board 1 is placed between the stirrup 21 and the frame column 12, and the stirrup 21 is placed in the groove 3;

[0052] Then, the modified epoxy resin structural glue is poured between the prefabricated ECC plate 1 and the frame column 12 to form the adhesive layer 4.

[0053] The fast hardening and early strength concrete is used to process the side connection of the adjacent prefabricated ECC plate 1, so that the connection stability of the prefabricated ECC plate 1 is strengthened.

[0054] The modified epoxy resin structural glue is a conventional modified epoxy resin structural glue, and the fast hardening and early strength concrete is a conventional fast hardening and early strength commercial concrete.

[0055] Embodiment 2

[0056] Reference Figure 5 A prefabricated ECC reinforcing member for RC frame column seismic reinforcement, which is different from the embodiment 1 in that the stirrup 21 is provided with a connecting end 8 at each end, and the two connecting ends 8 are provided with connecting holes 9.

[0057] The connecting sleeve 22 is provided with two groups of positioning through holes 10 and positioning threaded holes 11, each group of the positioning through holes 10 and the positioning threaded holes 11 are coaxially arranged, the connecting holes 9, the positioning through holes 10 and the positioning threaded holes 11 are penetrated by positioning bolts 13, and the positioning bolts 13 are screwed with the positioning threaded holes 11.

[0058] In construction, the connecting sleeve 22 is first sleeved on the connecting end 8 at each end of the stirrup 21, then the positioning bolts 13 are penetrated through the connecting holes 9 and the positioning through holes 10, and the positioning bolts 13 are screwed and tightened together with the positioning threaded holes 11.

[0059] Embodiment 3

[0060] Reference Figure 6 A prefabricated ECC reinforcing member for RC frame column seismic reinforcement, which is different from the embodiment 1 in that the groove 3 is upwardly inclined to the direction away from the frame column 12, that is, the groove 3 is downwardly inclined to the direction close to the frame column 12; when the stirrup 21 is placed in the groove 3, the stirrup 21 can slide down to the bottom of the groove 3 along the groove 3 due to the influence of gravity.

[0061] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A prefabricated ECC reinforcing piece for RC frame column seismic reinforcement, comprising a plurality of prefabricated ECC plates (1) and a prefabricated assembly for prefabricating the prefabricated ECC plates (1); characterized in that The prefabricated assembly comprises a stirrup (21) arranged horizontally and a connecting sleeve (22) for connecting both ends of the stirrup (21); The prefabricated ECC plate (1) is provided with a groove (3) for placing the stirrup (21) on the side away from the frame column (12); An adhesive layer (4) is arranged between the prefabricated ECC plate (1) and the frame column (12), and the width of the prefabricated ECC plate (1) is the same as the width of the frame column (12).

2. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, The stirrup (21) is uniformly arranged in the vertical direction.

3. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, Both ends of the stirrup (21) are provided with external threads of the same rotation direction, and the connecting sleeve (22) is provided with internal threads matched with the external threads.

4. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, The cross section of the groove (3) is U-shaped and the size is matched with the stirrup (21).

5. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 4, wherein, When the thickness of the prefabricated ECC plate (1) is t, the depth of the groove (3) is less than t / 2, and the diameter of the stirrup (21) is less than the depth of the groove (3).

6. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, An adhesive vertical strip (6) is arranged between the opposite sides of adjacent prefabricated ECC plates (1).

7. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, The side of the prefabricated ECC plate (1) facing the frame column (12) is provided with a friction pattern (7).

8. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, Both ends of the stirrup (21) are provided with connecting ends (8), and connecting holes (9) are arranged on both connecting ends (8); The connecting sleeve (22) is provided with two groups of positioning perforations (10) and positioning threaded holes (11), each group of positioning perforations (10) and positioning threaded holes (11) are coaxially arranged, positioning bolts (13) are arranged in the connecting holes (9), positioning perforations (10) and positioning threaded holes (11), and the positioning bolts (13) are screwed with the positioning threaded holes (11).

9. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, The groove (3) is upwardly inclined in the direction away from the frame column (12).

10. The precast ECC reinforcement for seismic retrofitting of RC frame columns according to claim 1, wherein, The adhesive layer (4) is a modified epoxy resin structural adhesive layer.

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