FRP rib-recycled aggregate alkali-activated concrete shear wall structure

Abstract

The utility model belongs to the field of shear walls, and particularly relates to an FRP rib-recycled aggregate alkali-activated concrete shear wall structure which sequentially comprises an acrylic acid waterproof anti-crack layer, an outer alkali-activated gel mortar plaster layer, an asbestos rubber damping layer and a recycled aggregate alkali-activated concrete main wall body from left to right. The device comprises an FRP reinforcing mesh, a rubber damping embedded part, FRP main ribs, an inner alkali-activated gel mortar plaster layer and a steel plate-bolt composite connecting piece, according to the utility model, phosphogypsum-fly ash-slag is used as a cementing material for preparing concrete, and recycled aggregate is used for replacing natural aggregate, so that the comprehensive utilization rate of solid waste is improved. The anti-cracking performance of the wall is improved through the acrylic acid waterproof anti-cracking layer, double damping is achieved through the asbestos rubber damping layer and the rubber damping embedded part, energy is further transmitted upwards through the energy dissipation characteristic of the wall, and then the anti-seismic performance of a building is improved; the mechanical property of the shear wall is further improved; the service life of the wall body is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of shear walls, and in particular relates to an FRP bar-recycled aggregate alkali-activated concrete shear wall structure. Background Art

[0002] my country is a country prone to earthquakes, with numerous seismic belts. Sudden earthquakes severely impact urban development and the safety of residents. They pose significant risks to buildings, primarily through structural damage, loss of functionality, and potential safety hazards. Buildings with inadequate seismic design or poorly made materials can collapse and crack, resulting in significant casualties and economic losses. Currently, shear walls are the primary structural component used for earthquake resistance. As the primary load-bearing component in a building, they absorb the primary vertical and lateral seismic forces during an earthquake, increasing the building's stiffness and improving its seismic performance. However, conventional shear walls often exhibit surface cracking, stress concentration, and weak shear resistance at the epicenter. During strong earthquakes, shear walls can lose their load-bearing capacity or even fail. These issues can further lead to structural failure, resulting in damage or even collapse. FRP bars, with their lightweight, high-strength, and fatigue-resistant properties, can replace traditional steel bars to reduce the weight of shear walls and increase their shear resistance, thereby improving their mechanical properties. Meanwhile, currently mainstream dampers are primarily affixed to the exterior of walls or partially embedded within them. While these dampers can effectively dissipate energy and reduce vibration, their placement outside the structure leads to high maintenance costs and requires wall reinforcement, resulting in poor integrity. Therefore, pre-installed energy-absorbing test specimens within shear walls not only maintain the integrity of the wall but also dissipate energy and reduce vibration during earthquakes, redistributing stress, alleviating potential stress concentrations within the shear wall and improving its shear resistance. Furthermore, my country's continued urbanization has led to rapid growth in the construction industry, but this has also had a significant impact on the country's ecological and urban environments. The demolition of numerous obsolete buildings has generated approximately 200 million tons of waste concrete, accounting for 40% to 50% of total municipal waste. Furthermore, the accumulation of industrial solid waste, such as phosphogypsum, fly ash, and slag, continues to increase annually. Utility Model Content

[0003] The utility model provides an FRP bar-recycled aggregate alkali-activated concrete shear wall structure, and the specific technical solution is as follows:

[0004] An FRP bar-recycled aggregate alkali-activated concrete shear wall structure, comprising an acrylic waterproof and crack-resistant layer, an external alkali-activated cementitious mortar plaster layer, an asbestos rubber shock-absorbing layer, an FRP steel mesh, a recycled aggregate alkali-activated concrete main wall, an internal alkali-activated cementitious mortar plaster layer, rubber damping embedded parts, FRP main bars, and steel plate-bolt composite connectors;

[0005] The FRP reinforcement-recycled aggregate alkali-activated concrete shear wall structure consists of, from left to right, an acrylic waterproof and crack-resistant layer, an external alkali-activated cementitious mortar plaster layer, an asbestos rubber shock-absorbing layer, a recycled aggregate alkali-activated concrete main wall, and an internal alkali-activated cementitious mortar plaster layer.

[0006] The rubber damping embedded parts and FRP main reinforcement are arranged in the recycled aggregate alkali-activated concrete main wall;

[0007] The FRP steel mesh is set in the recycled aggregate alkali-activated concrete main wall and is symmetrically arranged 50 mm away from the wall surface;

[0008] The FRP main reinforcement is arranged along the center line of the recycled aggregate alkali-activated concrete main wall and is set at the center of two adjacent rubber damping embedded parts;

[0009] The rubber damping embedded parts are arranged along the center line of the recycled aggregate alkali-activated concrete main wall with a spacing of 200mm-300mm;

[0010] An outer alkali-activated cementitious mortar plaster layer and an inner alkali-activated cementitious mortar plaster layer are respectively provided on both sides of the recycled aggregate alkali-activated concrete main wall; an asbestos rubber shock-absorbing layer is provided between one side of the outer alkali-activated cementitious mortar plaster layer and the recycled aggregate alkali-activated concrete main wall; an acrylic waterproof and anti-cracking layer is provided on the other side of the outer alkali-activated cementitious mortar plaster layer;

[0011] The steel plate-bolt composite connector is used to connect two adjacent FRP tendon-recycled aggregate alkali-activated concrete shear walls.

[0012] The preferred embodiment of the FRP bar-recycled aggregate alkali-activated concrete shear wall structure is that the recycled aggregate alkali-activated concrete main wall has a thickness of 250mm-350mm and is cast from a mixture of alkali-activated cementitious material, recycled coarse aggregate, recycled fine aggregate, water, and a water reducer. The recycled coarse aggregate has a particle size of 10mm-40mm, and the recycled fine aggregate has a particle size of 1mm-5mm. The alkali-activated cementitious material is composed of phosphogypsum, fly ash, and slag in a mass ratio of 2:1:2. Quicklime is used as the alkali activator, and its added mass accounts for 2%-6% of the total mass of the PFS alkali-activated cement.

[0013] The FRP bar-recycled aggregate alkali-activated concrete shear wall structure has a preferred embodiment in which the outer alkali-activated cementitious mortar plaster layer and the inner alkali-activated cementitious mortar plaster layer are composed of alkali-activated cementitious material slurry and recycled fine aggregate, the particle size of the recycled fine aggregate is 1mm-10mm, and the thickness of the alkali-activated cementitious mortar plaster layer is 20mm.

[0014] The FRP bar-recycled aggregate alkali-activated concrete shear wall structure has a preferred embodiment in which the FRP steel mesh is made of FRP bars with a diameter of 6 mm and a spacing of 60 mm cross-rigidly connected; the FRP main bars are FRP bars with a diameter of 16 mm-20 mm.

[0015] The preferred embodiment of the FRP tendon-recycled aggregate alkali-activated concrete shear wall structure is that the acrylic waterproof and crack-resistant layer is painted with acrylic waterproof elastic paint, with a total of 3 coats, with a bottom layer thickness of 0.3mm-0.5mm, a middle layer thickness of 0.5mm-0.7mm, and a surface layer thickness of 0.5mm-0.7mm.

[0016] The acrylic waterproof elastic coating consists of acrylic resin, talc, titanium dioxide, water, emulsifier, defoamer, wetting agent and dispersant, wherein the mass ratio of acrylic resin, talc, titanium dioxide and water is 4:1:1:2, the emulsifier, defoamer, wetting agent and dispersant each account for 1% of the total mass, and the fineness of the talc and titanium dioxide is 40μm-45μm.

[0017] The FRP bar-recycled aggregate alkali-activated concrete shear wall structure has a preferred embodiment in which the rubber damping embedded part consists of a foamed silicone tube, a spring, and two rubber damping blocks. The two rubber damping blocks are rigidly connected to the two ends of the spring and then placed in the foamed silicone tube, and the tube opening is made of rubber packaging; the foamed silicone tube has a diameter of 40 mm, a tube thickness of 2 mm to 4 mm, and a length of 200 mm; the spring is 60 mm to 80 mm long, and the rubber damping block is a cylinder with a diameter of 32 mm to 36 mm and a length of 60 mm to 70 mm.

[0018] The preferred embodiment of the FRP bar-recycled aggregate alkali-activated concrete shear wall structure is that the asbestos rubber shock-absorbing layer has a thickness of 20 mm to 30 mm and is composed of asbestos fibers, rubber particles and carbon black in a volume ratio of 4:6:1.

[0019] The preferred embodiment of the FRP bar-recycled aggregate alkali-activated concrete shear wall structure is that the steel plate-bolt composite connector consists of two Q235 steel plates and M16 bolts, the steel plates are 400mm-500mm high, and the bolts are symmetrically arranged 100mm from the edge of the steel plates with a spacing of 100mm-200mm.

[0020] Beneficial effects

[0021] This FRP-recycled aggregate alkali-activated concrete shear wall structure utilizes an acrylic waterproof and crack-resistant layer, an asbestos rubber shock-absorbing layer, and rubber damping embedded components to enhance the shear wall's crack and seismic resistance. This disperses the internal forces within the shear wall when subjected to impacts and earthquakes, improving its ductility and further extending its service life, thus ensuring public safety in these extreme conditions. Furthermore, the shear wall structure is further reinforced with FRP steel mesh and FRP main bars, increasing its ultimate bearing capacity and reducing the likelihood of brittle failure. Alkali-activated recycled aggregate concrete utilizes industrial solid waste: phosphogypsum, fly ash, and slag. These are mixed in appropriate proportions to create PFS alkali-activated cement, which produces crystals and gels that fill the concrete's internal structure, thereby enhancing the mechanical properties of the recycled aggregate concrete. Furthermore, the recycled aggregate is prepared by crushing, grinding, and grading construction solid waste, increasing the comprehensive utilization rate of construction solid waste and achieving a truly green and sustainable approach. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the cross-section of the FRP reinforcement-recycled aggregate alkali-activated concrete shear wall structure.

[0023] Figure 1 Middle: 1-acrylic waterproof and anti-cracking layer, 2-external alkali-activated cementitious mortar plaster layer, 3-asbestos rubber shock-absorbing layer, 4-FRP steel mesh, 5-recycled aggregate alkali-activated concrete main wall, 6-rubber damping embedded parts, 7-FRP main reinforcement, 8-internal alkali-activated cementitious mortar plaster layer, 9-steel plate-bolt composite connector. DETAILED DESCRIPTION

[0024] The invention is further described below with reference to the accompanying drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments. Without departing from the above-mentioned concept of the present invention, various substitutions and modifications based on common technical knowledge and customary means in the field should be included in the scope of protection of the present invention.

[0025] like Figure 1 As shown, an FRP reinforcement-recycled aggregate alkali-activated concrete shear wall structure consists of an acrylic waterproof and crack-resistant layer 1, an external alkali-activated cementitious mortar plaster layer 2, an asbestos rubber shock-absorbing layer 3, an FRP steel mesh 4, a recycled aggregate alkali-activated concrete main wall 5, rubber damping embedded parts 6, FRP main reinforcement 7, an internal alkali-activated cementitious mortar plaster layer 8, and a steel plate-bolt composite connector 9.

[0026] The FRP reinforcement-recycled aggregate alkali-activated concrete shear wall structure is composed of, from left to right, acrylic waterproof and crack-resistant layer 1, external alkali-activated cementitious mortar plaster layer 2, asbestos rubber shock-absorbing layer 3, recycled aggregate alkali-activated concrete main wall 4, and internal alkali-activated cementitious mortar plaster layer 5.

[0027] The rubber damping embedded parts 6 and the FRP main reinforcement 7 are arranged in the recycled aggregate alkali-activated concrete main wall 5 .

[0028] The FRP steel mesh 4 is arranged in the recycled aggregate alkali-activated concrete main wall 5 and is symmetrically arranged 50 mm away from the wall surface;

[0029] The FRP main reinforcement 7 is arranged along the center line of the recycled aggregate alkali-activated concrete main wall 5 and is set at the center of two adjacent rubber damping embedded parts 6;

[0030] The rubber damping embedded parts 6 are arranged along the center line of the recycled aggregate alkali-activated concrete main wall 5 with a spacing of 200mm-300mm;

[0031] An outer alkali-activated cementitious mortar plaster layer 2 and an inner alkali-activated cementitious mortar plaster layer 8 are respectively provided on both sides of the recycled aggregate alkali-activated concrete main wall 5; an asbestos rubber shock-absorbing layer 3 is provided between one side of the outer alkali-activated cementitious mortar plaster layer 2 and the recycled aggregate alkali-activated concrete main wall 5; an acrylic waterproof and crack-resistant layer 1 is provided on the other side of the outer alkali-activated cementitious mortar plaster layer 2;

[0032] The steel plate-bolt composite connector 9 is used to connect two adjacent FRP tendon-alkali activated recycled aggregate concrete shear walls.

[0033] The recycled aggregate alkali-activated concrete main wall 5 has a thickness of 250mm-350mm and is cast from a mixture of alkali-activated cementitious material, recycled coarse aggregate, recycled fine aggregate, water, and a water reducer. The recycled coarse aggregate has a particle size of 10mm-40mm, and the recycled fine aggregate has a particle size of 1mm-5mm. The alkali-activated cementitious material consists of phosphogypsum, fly ash, and slag in a mass ratio of 2:1:2. Quicklime is used as the alkali activator, and its addition weight accounts for 2%-6% of the total mass of the PFS alkali-activated cement.

[0034] The outer alkali-activated cementitious mortar plaster layer 2 and the inner alkali-activated cementitious mortar plaster layer 8 are composed of alkali-activated cementitious material slurry and recycled fine aggregate. The particle size of the recycled fine aggregate is 1mm-10mm, and the thickness of the alkali-activated cementitious mortar plaster layer is 20mm.

[0035] The FRP steel mesh 4 is made of FRP bars with a diameter of 6mm and a spacing of 60mm cross-rigid connection; the FRP steel mesh 4 is arranged in the recycled aggregate alkali-activated concrete main wall 5 and is symmetrically arranged 50mm away from the wall surface; the FRP main bars 7 are FRP bars with a diameter of 16mm-20mm, arranged along the center line of the recycled aggregate alkali-activated concrete main wall 5, and set at the center of two adjacent rubber damping embedded parts 6.

[0036] The acrylic waterproof and crack-resistant layer 1 is painted with acrylic waterproof elastic paint, with a total of 3 coats, the bottom layer thickness is 0.3mm-0.5mm, the middle layer thickness is 0.5mm-0.7mm, and the surface layer thickness is 0.5mm-0.7mm.

[0037] The acrylic waterproof elastic coating 1 is composed of acrylic resin, talc, titanium dioxide, water, emulsifier, defoamer, wetting agent and dispersant, wherein the mass ratio of acrylic resin, talc, titanium dioxide and water is 4:1:1:2, the emulsifier, defoamer, wetting agent and dispersant each account for 1% of the total mass, and the fineness of the talc and titanium dioxide is 40μm-45μm.

[0038] The rubber damping embedded part 6 is embedded in the main wall and arranged along the center line of the main wall with a spacing of 200mm-300mm. The rubber damping embedded part 6 consists of a foamed silicone tube, a spring and two rubber damping blocks. The two rubber damping blocks are rigidly connected to the two ends of the spring and placed in the foamed silicone tube, and are made of rubber-encapsulated tube openings. The diameter of the foamed silicone tube is 40mm, the tube thickness is 2mm-4mm, and the length is 200mm. The spring is 60mm-80mm long, and the rubber damping block is a cylinder with a diameter of 32mm-36mm and a length of 60mm-70mm.

[0039] The asbestos rubber shock-absorbing layer 3 has a thickness of 20 mm to 30 mm and is composed of asbestos fibers, rubber particles and carbon black in a volume ratio of 4:6:1.

[0040] The steel plate-bolt composite connector 9 is composed of two Q235 steel plates and M16 bolts. The steel plates are 400mm-500mm high, and the bolts are symmetrically arranged 100mm away from the edges of the steel plates with a spacing of 100mm-200mm.

Claims

1. An FRP bar-recycled aggregate alkali-activated concrete shear wall structure, characterized in that: It consists of an acrylic waterproof and crack-resistant layer, an external alkali-activated cementitious mortar plaster layer, an asbestos rubber shock-absorbing layer, an FRP steel mesh, a recycled aggregate alkali-activated concrete main wall, an internal alkali-activated cementitious mortar plaster layer, rubber damping embedded parts, FRP main reinforcement and steel plate-bolt composite connectors. The FRP reinforcement-recycled aggregate alkali-activated concrete shear wall structure consists of, from left to right, an acrylic waterproof and crack-resistant layer, an external alkali-activated cementitious mortar plaster layer, an asbestos rubber shock-absorbing layer, a recycled aggregate alkali-activated concrete main wall, and an internal alkali-activated cementitious mortar plaster layer. The rubber damping embedded parts and FRP main reinforcement are arranged in the recycled aggregate alkali-activated concrete main wall; The FRP steel mesh is set in the recycled aggregate alkali-activated concrete main wall and is symmetrically arranged 50 mm away from the wall surface; The FRP main reinforcement is arranged along the center line of the recycled aggregate alkali-activated concrete main wall and is set at the center of two adjacent rubber damping embedded parts; The rubber damping embedded parts are arranged along the center line of the recycled aggregate alkali-activated concrete main wall with a spacing of 200mm-300mm; An outer alkali-activated cementitious mortar plaster layer and an inner alkali-activated cementitious mortar plaster layer are respectively provided on both sides of the recycled aggregate alkali-activated concrete main wall; an asbestos rubber shock-absorbing layer is provided between one side of the outer alkali-activated cementitious mortar plaster layer and the recycled aggregate alkali-activated concrete main wall; an acrylic waterproof and anti-cracking layer is provided on the other side of the outer alkali-activated cementitious mortar plaster layer; The steel plate-bolt composite connector is used to connect two adjacent FRP tendon-recycled aggregate alkali-activated concrete shear walls.

2. The FRP tendon-recycled aggregate alkali-activated concrete shear wall structure according to claim 1, characterized in that: The thickness of the recycled aggregate alkali-activated concrete main wall is 250mm-350mm.

3. The FRP tendon-recycled aggregate alkali-activated concrete shear wall structure according to claim 1, characterized in that: The particle size of the recycled fine aggregate in the external alkali-activated cementitious mortar plaster layer and the internal alkali-activated cementitious mortar plaster layer is 1mm-10mm, and the thickness of the alkali-activated cementitious mortar plaster layer is 20mm.

4. The FRP tendon-recycled aggregate alkali-activated concrete shear wall structure according to claim 1, characterized in that: The FRP steel mesh is made of FRP bars with a diameter of 6 mm and a spacing of 60 mm cross-rigid connection; The FRP main reinforcement is an FRP reinforcement with a diameter of 16mm-20mm.

5. The FRP tendon-recycled aggregate alkali-activated concrete shear wall structure according to claim 1, characterized in that: The acrylic waterproof and anti-cracking layer is painted with acrylic waterproof elastic paint, with a total of 3 coats, with a bottom layer thickness of 0.3mm-0.5mm, a middle layer thickness of 0.5mm-0.7mm, and a surface layer thickness of 0.5mm-0.7mm.

6. The FRP tendon-recycled aggregate alkali-activated concrete shear wall structure according to claim 1, characterized in that: The rubber damping embedded part consists of a foamed silicone tube, a spring and two rubber damping blocks. The two rubber damping blocks are rigidly connected to the two ends of the spring and placed in the foamed silicone tube, and are made of rubber-encapsulated tube openings; the foamed silicone tube has a diameter of 40mm, a tube thickness of 2mm-4mm, and a length of 200mm; the spring is 60mm-80mm long, and the rubber damping block is a cylinder with a diameter of 32mm-36mm and a length of 60mm-70mm.

7. The FRP tendon-recycled aggregate alkali-activated concrete shear wall structure according to claim 1, characterized in that: The thickness of the asbestos rubber shock-absorbing layer is 20mm-30mm.

8. The FRP tendon-recycled aggregate alkali-activated concrete shear wall structure according to claim 1, characterized in that: The steel plate-bolt composite connector consists of two Q235 steel plates and M16 bolts. The steel plates are 400mm-500mm high, and the bolts are symmetrically arranged 100mm away from the edges of the steel plates with a spacing of 100mm-200mm.

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