Method for seismic reinforcement of masonry structure house in tropical corrosion environment by FRP

Abstract

The application provides a FRP anti-seismic reinforcing method for masonry structure houses in a tropical corrosion environment, and the method comprises the following steps: S1, repairing and leveling the inner surface of a wall of a masonry house to be reinforced; S2, drilling holes in the inner wall surface after the repair and implanting FRP bars; S3, laying FRP mesh on the inner wall surface and binding and fixing the FRP mesh with the pre-implanted FRP bars by using a binding belt, and then forming a protective layer by using mortar; S4, installing L-shaped FRP profiles at the corners of the inner wall; S5, installing inclined L-shaped FRP profiles at the top of a gable; and S6, installing L-shaped FRP profiles and FRP profile plates at the corners of the outer wall. The application utilizes the advantages of FRP materials, such as high specific strength, high specific stiffness, good fatigue resistance, excellent corrosion resistance in a severe service environment, easy cutting and convenient construction, and the like, to reinforce the anti-seismic performance of old masonry structure houses, so that the bearing capacity, overall stiffness and anti-seismic performance of the houses can be significantly improved, and the application has the advantages of fast construction, good durability, long service life and low comprehensive cost.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of masonry house reinforcement, in particular to a FRP anti-seismic reinforcement method for masonry structure houses in a tropical corrosion environment. BACKGROUND

[0002] Masonry structure is a kind of building structure form with a long history and wide application. At present, a large number of masonry houses built in the 1980s and 1990s exist in rural areas in China. At that time, the understanding of earthquake disasters and the understanding and popularization of anti-seismic technology were not enough, and at the same time, the economic conditions of the rural areas were limited, so the investment in building houses was still very limited. The existing masonry houses basically retain the original characteristics in layout and structure form: unreasonable seismic structure and structure arrangement, and the lack of overall planar external constraint of the roof truss, which leads to relatively weak anti-seismic performance of the masonry houses compared with other structure forms. When resisting lateral horizontal earthquake action, the masonry houses usually crack in the case of small deformation, and then the cracks develop rapidly until the houses collapse suddenly, which causes great damage and has no obvious omen, and thus poses a great threat to people's life and property safety. Meanwhile, in some coastal areas in southern China, there are strong regional characteristics, and high temperature, high humidity, high salt and high ultraviolet radiation lead to serious corrosion and aging of traditional reinforced concrete materials in these areas. In the traditional reinforcement method of masonry structure, a large amount of wet work is needed, and a large amount of traditional building materials is used. In the case of relatively poor environmental conditions and relatively tight construction period, the traditional reinforcement method is not only low in construction efficiency, but also cannot guarantee the service life of the building. FRP has the advantages of light weight, high strength, easy construction and corrosion resistance. By combining the advantages of FRP such as light weight, high strength, corrosion resistance, good fatigue resistance, excellent corrosion resistance in harsh service environments, easy cutting and convenient construction, the old masonry structure can be reinforced for anti-seismic reinforcement, which can significantly improve the bearing capacity, overall stiffness and anti-seismic performance of the old masonry structure, and has the advantages of fast construction, good durability, long service life and low comprehensive cost. The FRP anti-seismic reinforcement method has important application and promotion value for the anti-seismic reinforcement of masonry structures in harsh service environments such as high temperature, high humidity, high salt and high ultraviolet radiation.

[0003] Therefore, it is an urgent problem for those skilled in the art to provide an FRP anti-seismic reinforcement method for masonry structure houses in a tropical corrosion environment, which has high construction efficiency, long service life, low comprehensive cost and remarkable anti-seismic effect, and can be used in a harsh environment such as high temperature, high humidity, high salt and high ultraviolet radiation. SUMMARY

[0004] In view of this, the purpose of the present application is to provide a FRP seismic reinforcement method for masonry structure houses in tropical corrosion environments, which at least solves the above problems.

[0005] The technical solutions adopted by the present application are as follows:

[0006] The FRP seismic reinforcement method for masonry structure houses in tropical corrosion environments comprises the following steps:

[0007] S1, finishing and repairing the inner surface of the original building structure to be reinforced masonry wall;

[0008] S2, drilling FRP bars (1) into the inner wall surface of the masonry structure;

[0009] S3, laying FRP mesh (2) on the surface of the masonry structure wall and performing mortar finishing;

[0010] S4, installation of L-shaped FRP profiles (3) at the inner corner of the wall;

[0011] S5, installation of L-shaped FRP profiles (3) at the top of the gable;

[0012] S6, installation of L-shaped FRP (3) and FRP profile plate (4) at the outer corner of the wall;

[0013] In step S1, the finishing and repairing of the inner surface of the original building structure to be reinforced masonry wall comprises: removing the protruding parts on the surface of the masonry wall to be reinforced, and repairing the obvious depressions on the surface of the masonry;

[0014] In step S2, the drilling and planting step of the FRP bars (1) on the inner wall surface of the masonry structure comprises: drilling holes in the solid part of the masonry inner wall block, blowing dust, injecting planting glue, and planting FRP bars (1) after drilling;

[0015] In step S3, the step of laying FRP mesh (2) on the inner surface of the masonry structure wall and performing mortar finishing comprises: laying the FRP mesh (2) on the inner surface of the masonry structure wall, using plastic ties to bind and fix the FRP bars (1) and the FRP mesh (2), and finally using mortar to finish and level the wall;

[0016] In step S4, the installation step of the L-shaped FRP profile at the inner corner of the wall comprises: drilling holes in the L-shaped FRP profile (3), drilling, blowing dust, and planting bars at the corresponding inner corner position, and fixing the L-shaped FRP profile (3) with a matching nut after the planting glue solidifies;

[0017] In step S5, the gable top inclined L-shaped FRP profile installation step includes: punching the L-shaped FRP profile (3), marking the hole position of the L-shaped FRP profile (3) on the wall top, and punching the masonry wall, and blowing dust. The L-shaped FRP profile (3) is fixed with the roof wood beam by drilling and using wood screws (5), the hole position of the gable is glued and FRP bars (1) are implanted, and after the glue is hardened, the matched nut is fixed;

[0018] In step S6, the installation step of the outer wall corner L-shaped FRP profile and the FRP profile plate includes: punching the L-shaped FRP profile (3) and the profile plate (4), and using structural glue to bond the L-shaped FRP profile (3) and the FRP profile plate (4) to form an outer wall corner wrapping profile, and after the structural glue is hardened, the outer wall corner wrapping profile is aligned at the wall corner. The wall body is punched, dust is blown, glue is injected, and FRP bars (1) are implanted, and after the glue is hardened, the matched nut is tightened.

[0019] Further, for the masonry structure wall inner surface laying FRP mesh (2) and mortar finishing step, the wall surface is watered before the mortar finishing leveling is performed, and after the wall surface is free of water, the mortar finishing is performed on the to-be-reinforced masonry wall in a downward order.

[0020] Further, the L-shaped FRP profile and the FRP profile plate are fully coated with structural glue at the contact surface of the wall body, so as to ensure that the FRP profile has sufficient bonding strength with the contact wall surface.

[0021] Further, the L-shaped FRP profile (3) between the gable top inclined L-shaped FRP profile (3) is fully anchored and linked by using FRP bars (1), so that the gable top inclined L-shaped FRP profile (3) is connected to form a whole. The L-shaped FRP profile (3) between the inner wall corner L-shaped FRP profile (3) and the gable top inclined L-shaped FRP profile (3) is fully anchored and linked by using FRP bars (1), so that the inner wall corner L-shaped FRP profile (3) and the gable top inclined L-shaped FRP profile (3) are connected to form a whole.

[0022] Further, the FRP profile plates (4) are uniformly and spacedly arranged and bonded with the L-shaped FRP profiles (3).

[0023] Further, the materials of the L-shaped FRP profile (3), the FRP profile plate (4), the FRP mesh (2), and the FRP bar (1) are one or more combinations of carbon fiber, glass fiber, aramid fiber, or basalt fiber.

[0024] Compared with the prior art, the beneficial effects of the present application are:

[0025] The application provides a FRP anti-seismic reinforcing method for a masonry structure house in a tropical corrosion environment. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only preferred embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0027] Figure 1 Fig. 1 is a schematic diagram of the construction arrangement of the FRP mesh and the FRP bar of the FRP anti-seismic reinforcing method for the masonry structure house in the tropical corrosion environment provided by the embodiments of the present application.

[0028] Figure 2 Fig. 2 is a schematic diagram of the reinforcing and installing of the L-shaped FRP profile of the inner wall corner of the FRP anti-seismic reinforcing method for the masonry structure house in the tropical corrosion environment provided by the embodiments of the present application.

[0029] Figure 3 Fig. 3 is a schematic diagram of the reinforcing and installing of the wrapping profile of the outer wall corner of the FRP anti-seismic reinforcing method for the masonry structure house in the tropical corrosion environment provided by the embodiments of the present application.

[0030] Figure 4 Fig. 4 is a schematic diagram of the connection between the inclined L-shaped FRP profile of the gable top and the inclined L-shaped FRP profile of the gable top and the L-shaped FRP profile of the inner wall corner of the FRP anti-seismic reinforcing method for the masonry structure house in the tropical corrosion environment provided by the embodiments of the present application.

[0031] Figure 5 Fig. 5 is a schematic diagram of the connection between the inclined L-shaped FRP profile of the gable top and the wood beam of the roof of the FRP anti-seismic reinforcing method for the masonry structure house in the tropical corrosion environment provided by the embodiments of the present application.

[0032] Figure 6 Fig. 6 is a schematic diagram of the flow of the FRP anti-seismic reinforcing method for the masonry structure house in the tropical corrosion environment provided by the embodiments of the present application.

[0033] In the figure, 1 is FRP tendon, 2 is FRP mesh, 3 is L-shaped FRP profile, 4 is FRP profile plate, and 5 is wood screw. DETAILED DESCRIPTION

[0034] The principles and features of the present application are described below in conjunction with the accompanying drawings, and the enumerated embodiments are only used to explain the present application and are not used to limit the scope of the present application.

[0035] Reference Figures 1 to 6 The present application provides a kind of FRP seismic reinforcement method of masonry structure house in tropical corrosion environment, the method comprises the following steps:

[0036] S1, the inner surface of the masonry wall to be reinforced of original building structure is finished and repaired;

[0037] S2, FRP tendon (1) is drilled and planted on the inner wall surface of masonry structure;

[0038] S3, FRP mesh (2) is laid on the surface of masonry structure wall and mortar is applied;

[0039] S4, the installation of L-shaped FRP profile (3) at the inner corner of wall;

[0040] S5, the installation of L-shaped FRP profile (3) at the top of gable;

[0041] S6, the installation of L-shaped FRP (3) and FRP profile plate (4) at the outer corner of wall;

[0042] In step S1, the finishing and repairing of the inner surface of the masonry wall to be reinforced of original building structure includes: removing the protruding parts on the surface of the masonry wall to be reinforced, and repairing the obvious recesses on the surface of the masonry;

[0043] In step S2, the step of drilling and planting tendon on the inner wall surface of masonry structure includes: drilling on the solid part of masonry inner wall block, blowing ash, injecting tendon glue, and planting FRP tendon (1) after drilling;

[0044] In step S3, the step of laying FRP mesh (2) on the inner surface of masonry structure wall and applying mortar includes: laying the FRP mesh (2) on the inner surface of masonry structure wall, binding and fixing the FRP tendon (1) and the FRP mesh (2) using plastic ties, and finally applying mortar to the wall to level it;

[0045] In step S4, the installation step of L-shaped FRP profile at the inner corner of wall includes: drilling on the L-shaped FRP profile (3), drilling, blowing ash, and planting tendon at the corresponding inner corner position, and fixing the L-shaped FRP profile (3) with a matching nut after the tendon glue solidifies;

[0046] In step S5, the gable top inclined L-shaped FRP profile installation step includes: punching the L-shaped FRP profile (3), marking the hole position of the L-shaped FRP profile (3) on the wall top, and punching the masonry wall, and blowing dust. The L-shaped FRP profile (3) is fixed with the roof wood beam by drilling and using wood screws (5), the hole position of the gable is glued and FRP bars (1) are implanted, and after the glue is hardened, the matched nut is fixed;

[0047] In step S6, the installation step of the outer wall corner L-shaped FRP profile and the FRP profile plate includes: punching the L-shaped FRP profile (3) and the profile plate (4), and using structural adhesive to bond the L-shaped FRP profile (3) and the FRP profile plate (4) to form an outer wall corner wrapping profile. After the structural adhesive is hardened, the outer wall corner wrapping profile is aligned at the wall corner. The wall body is punched, dust is blown, glue is injected, and FRP bars (1) are implanted at the hole position of the outer wall corner wrapping profile. After the glue is hardened, the matched nut is tightened.

[0048] Exemplarily, by using FRP material with high specific strength, high specific stiffness, good fatigue resistance, excellent corrosion resistance in harsh service environment, easy cutting and convenient construction, etc., the old masonry structure building is reinforced against earthquake, which can significantly improve its bearing capacity, overall stiffness and seismic performance, and has the advantages of fast construction, good durability, long service life and low comprehensive cost. It has important application and promotion value for seismic reinforcement of masonry structures in harsh service environments such as high temperature, high humidity, high salt and high ultraviolet radiation.

[0049] For the step of laying FRP mesh (2) on the inner surface of the masonry structure wall and performing mortar finishing, the wall surface is watered before performing mortar finishing and leveling.

[0050] The L-shaped FRP profile and the FRP profile plate are fully coated with structural adhesive at the contact surface with the wall, to ensure sufficient bonding strength between the FRP profile and the contact wall surface.

[0051] Exemplarily, by applying structural adhesive, the bonding strength can be ensured.

[0052] The L-shaped FRP profile (3) is fully anchored and linked by FRP bars (1) between the gable top inclined L-shaped FRP profiles (3), so that the gable top inclined L-shaped FRP profiles (3) are connected to form a whole. The L-shaped FRP profile (3) and the gable top inclined L-shaped FRP profile (3) are fully anchored and linked by FRP bars (1) between the inner wall corner L-shaped FRP profile (3) and the gable top inclined L-shaped FRP profile (3), so that the inner wall corner L-shaped FRP profile (3) and the gable top inclined L-shaped FRP profile (3) are connected to form a whole.

[0053] The FRP profile plates (4) are uniformly spaced and bonded with the L-shaped FRP profiles (3).

[0054] The material of the L-shaped FRP profiles (3), the FRP profile plates (4), the FRP mesh sheets (2) and the FRP bars (1) is one or more combinations of carbon fiber, glass fiber, aramid fiber or basalt fiber.

[0055] The above merely provides the preferred embodiments of the present application, and is not intended to limit the present application. 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 seismic reinforcement method for FRP masonry structures in tropical corrosive environments, characterized in that, The method includes the following steps: S1. Repair and maintenance of the inner surface of the masonry wall in the original building structure that needs to be reinforced; S2. Drill holes on the surface of the inner wall of the masonry structure and insert FRP bars (1). S3. FRP mesh (2) is laid on the surface of the masonry structure wall and mortar is applied; S4. Installation of L-shaped FRP profile (3) at the inner corner of the wall; S5, Installation of L-shaped FRP profile (3) on the top of the gable wall; S6. Installation of L-shaped FRP (3) and FRP profile (4) at the exterior corner; In step S1, the repair and maintenance of the inner surface of the masonry wall to be reinforced in the original building structure includes: removing the protruding parts of the surface of the masonry wall to be reinforced and repairing the obvious depressions on the surface of the masonry. In step S2, the drilling and rebar installation step on the inner wall surface of the masonry structure includes: drilling holes in the solid part of the masonry inner wall block, blowing ash from the holes, injecting rebar adhesive, and inserting FRP rebar (1). In step S3, the steps of laying FRP mesh (2) on the inner surface of the masonry structure wall and applying mortar include: laying the FRP mesh (2) on the inner surface of the masonry structure wall, using plastic ties to tie and fix the FRP reinforcement (1) to the FRP mesh (2), and finally applying mortar to level the wall. In step S4, the installation steps of the L-shaped FRP profile at the inner corner include: drilling holes in the L-shaped FRP profile (3), drilling, blowing ash, and planting rebar at the corresponding inner corner position, and fixing the L-shaped FRP profile (3) with matching nuts after the rebar adhesive has solidified. In step S5, the installation steps of the inclined L-shaped FRP profile on the top of the gable wall include: drilling holes in the L-shaped FRP profile (3), aligning the L-shaped FRP profile (3) with the top of the wall to mark the hole positions, drilling holes and blowing mortar into the masonry wall, fixing the L-shaped FRP profile (3) to the roof wooden beam with wood screws (5), injecting glue into the holes on the gable wall and inserting FRP reinforcement (1), and fixing with matching nuts after the reinforcement glue has solidified and hardened. In step S6, the installation steps of the L-shaped FRP profile and FRP profile plate at the outer corner of the wall include: drilling holes in the L-shaped FRP profile (3) and the profile plate (4), using structural adhesive to bond the L-shaped FRP profile (3) and the FRP profile plate (4) to form an outer corner wrapping profile, aligning the outer corner wrapping profile with the corner of the wall after the structural adhesive has solidified and hardened, drilling holes in the wall, blowing ash, injecting adhesive, and planting FRP bars (1) in accordance with the holes in the outer corner wrapping profile, and tightening the matching nuts after the adhesive for planting the bars has solidified. Among them, structural adhesive is fully applied to the contact surface between the L-shaped FRP profile (3), the FRP profile plate (4), and the wall to ensure that the FRP profile (3) and the contact wall surface have sufficient bonding strength; The L-shaped FRP profiles (3) at the top of the gable wall are fully anchored and connected by FRP bars (1) to form a whole. The L-shaped FRP profiles (3) at the inner corner of the wall are fully anchored and connected by FRP bars (1) to form a whole.

2. The seismic reinforcement method for FRP masonry structures in tropical corrosive environments according to claim 1, characterized in that, For the FRP mesh (2) laid on the inner surface of the masonry structure wall and the mortar plastering step, the wall surface is moistened with water before the mortar plastering and leveling. After the wall surface is free of water, the mortar plastering of the masonry wall to be reinforced is carried out in the order from bottom to top.

3. The seismic reinforcement method for FRP masonry structures in tropical corrosive environments according to claim 1, characterized in that, The FRP profiles (4) are evenly spaced and bonded to the L-shaped FRP profiles (3).

4. The seismic reinforcement method for FRP masonry structures in tropical corrosive environments according to claim 1, characterized in that, The materials of the L-shaped FRP profile (3), FRP profile plate (4), FRP mesh (2) and FRP rib (1) are one or more combinations of fibers such as carbon fiber, glass fiber, aramid fiber or basalt fiber.

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