UHPC reinforced reinforced concrete shear wall structure and construction method thereof
By enclosing a UHPC sleeve around a reinforced concrete shear wall and connecting it with anchor bolts and steel plates to form an integral load-bearing structure, the problems of large space occupation and insufficient durability of the increased cross-section reinforcement method are solved, and a highly efficient structural reinforcement effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUAQIAO UNIVERSITY
- Filing Date
- 2023-12-06
- Publication Date
- 2026-05-29
AI Technical Summary
In existing technologies, the method of increasing the cross-section for strengthening reinforced concrete shear walls results in a large space occupation of the structure, affecting the overall stress and insufficient durability, and cannot effectively improve the safety and sustainability of the building.
The reinforced concrete shear wall is encased in a UHPC sleeve and connected by anchor bolts and steel plates to form an integral load-bearing structure. Combining the performance advantages of UHPC and steel, the high strength of UHPC and the restraining effect of steel are used to achieve a secondary load-bearing effect.
It effectively reduces the need for additional cross-sectional dimensions, improves the load-bearing capacity and durability of the structure, and reduces the impact on the structure's self-weight and stiffness, thus overcoming the shortcomings of traditional reinforcement methods.
Smart Images
Figure CN117449505B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building structure technology, and more specifically, to a UHPC-reinforced reinforced concrete shear wall structure and its construction method. Background Technology
[0002] Existing structures often require reinforcement and renovation to improve their safety and sustainability due to changes in building function, structural aging, or design and construction defects. The current mainstream reinforcement method is cross-section enlargement, a simple process that effectively increases the strength and stiffness of components. However, the newly added concrete cross-section is usually large, occupying building space and increasing seismic forces, which is detrimental to the overall structural stress.
[0003] The performance characteristics of ultra-high performance concrete (UHPC) can be summarized as "ultra-high strength, high toughness, and high durability." It possesses excellent compressive, tensile, flexural, shear, and impact resistance properties. Furthermore, it effectively utilizes the strength of steel fibers and the tight bond between the cementitious slurry to achieve "strain hardening," resulting in significant deformation capacity. Its durability and weather resistance far surpass those of engineering materials such as steel, aluminum, and plastics. Using UHPC to replace ordinary concrete in reinforcing existing structures can effectively reduce the need for additional cross-sectional dimensions, have minimal impact on the stiffness of the original structure, and significantly improve its durability.
[0004] Reinforced concrete shear walls are crucial load-bearing components in building structures. During the service life of a building, shear walls, especially edge members, bear significant vertical and horizontal loads, and their mechanical properties directly determine the safety of the building structure. Therefore, finding a scientific and reasonable method to strengthen reinforced concrete shear walls, ensuring that the strengthened walls possess sufficient load-bearing capacity, reasonable stiffness, and good durability throughout their service life, is one of the urgent problems to be solved. Summary of the Invention
[0005] This invention discloses a UHPC-reinforced reinforced concrete shear wall structure, aiming to improve the above-mentioned technical problems.
[0006] The present invention adopts the following solution:
[0007] A UHPC-reinforced reinforced concrete shear wall structure includes a reinforced concrete shear wall body, a UHPC sleeve, connectors, and a steel plate. The UHPC sleeve wraps around the periphery of the reinforced concrete shear wall body, the steel plate is placed on the edge surface of the UHPC sleeve, one end of the connector is placed on the outside of the steel plate, and the other end passes through the inside of the steel plate to connect the reinforced concrete shear wall body and the UHPC sleeve.
[0008] As a further improvement, the connector is an anchor bolt.
[0009] As a further improvement, the steel plate is placed on the opposite side edge surfaces of the UHPC enclosure.
[0010] As a further improvement, the steel plate is U-shaped.
[0011] A construction method for a UHPC-reinforced reinforced concrete shear wall structure as described above includes the following steps:
[0012] First, holes need to be drilled in the edge area of the main reinforced concrete shear wall, and the connectors are inserted and fixed with glue. Second, formwork is erected and the UHPC enclosure is poured. The outer steel plate at the edge of the UHPC enclosure also serves as the formwork. Before pouring, the connectors are tightened to prevent the UHPC enclosure from bulging during the pouring process. Finally, after the UHPC enclosure has solidified, the excess formwork is removed, and the reinforcement of the main reinforced concrete shear wall is completed.
[0013] By adopting the above technical solution, the present invention can achieve the following technical effects:
[0014] The UHPC-reinforced reinforced concrete shear wall structure of this application fully combines the performance advantages of UHPC materials and steel, and integrates them into a whole that shares the load. This allows the structure to take advantage of the mechanical properties of UHPC, improves the appearance of "fat beams and thick columns" in traditional methods of reinforcing concrete structures by increasing the cross-section, has less impact on the structure's self-weight and stiffness, and improves the structure's durability. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is an elevation perspective view of the UHPC-reinforced reinforced concrete shear wall structure of the present invention;
[0017] Figure 2 This is a cross-sectional view of the UHPC-reinforced reinforced concrete shear wall structure of the present invention. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Example
[0020] The first embodiment of the present invention provides a UHPC-reinforced reinforced concrete shear wall structure, including a reinforced concrete shear wall body 1, a UHPC sleeve 3, a connector 2, and a steel plate 4. The UHPC sleeve 3 surrounds the periphery of the reinforced concrete shear wall body 1, the steel plate 4 is placed on the edge surface of the UHPC sleeve 3, one end of the connector 2 is placed on the outside of the steel plate 4, and the other end passes through the inside of the steel plate 4 to connect the reinforced concrete shear wall body 1 and the UHPC sleeve 3, so that the reinforced concrete shear wall body 1, the UHPC sleeve 3, and the steel plate 4 form a whole under load.
[0021] Furthermore, the connector 2 is an anchor bolt, which is inserted into the reinforced concrete shear wall body 1 by drilling during the reinforcement of the shear wall structure. The steel plate 4 also has through holes on its surface, facilitating the connection of the anchor bolt with the reinforced concrete shear wall body 1, the UHPC sleeve 3, and the steel plate 4 to form a unified structure.
[0022] Furthermore, the steel plate 4 is placed on the opposite side edge surfaces of the UHPC enclosure 3, making the overall structure symmetrical and aesthetically pleasing. At the same time, the U-shaped steel plate 4 can better match the edge shape of the UHPC enclosure 3.
[0023] The second embodiment of the present invention provides a construction method for a UHPC-reinforced reinforced concrete shear wall structure as described above, comprising the following steps:
[0024] First, holes need to be drilled in the edge area of the reinforced concrete shear wall main body 1, and the connectors 2 (anchor bolts) are inserted and fixed with adhesive. Second, formwork is erected and the UHPC enclosure 3 is poured. The outer steel plate 4 at the edge of the UHPC enclosure 3 also serves as formwork. Before pouring, the connectors 2 (anchor bolts) are tightened to prevent the UHPC enclosure 3 from bulging during the pouring process. Finally, after the UHPC enclosure 3 has solidified, the excess formwork is removed, completing the reinforcement work of the reinforced concrete shear wall main body 1. Figure 1 , Figure 2 .
[0025] The following are the beneficial effects of this UHPC-reinforced reinforced concrete shear wall structure:
[0026] This shear wall structure fully combines the performance advantages of UHPC materials and steel, and integrates them into a whole that shares the load. This allows the structure to leverage the mechanical properties of UHPC, improves the appearance of "fat beams and thick columns" in traditional methods of reinforcing concrete structures by increasing the cross-section, has less impact on the structure's self-weight and stiffness, and improves the structure's durability.
[0027] Furthermore, from the perspective of shear wall structure stress analysis, the reinforced structure is a secondary stress structure. The strain of the reinforcement material lags behind that of the original structure. Since the peak compressive strain of UHPC is significantly higher than that of ordinary concrete, it is difficult for the reinforcement layer and the original structure to effectively cooperate in stress. By wrapping the edge area of the shear wall structure with steel plate 4, the UHPC enclosure 3 around the reinforced concrete shear wall body 1 can be effectively constrained. The anchor bolts implanted in the reinforcement structure can provide lateral constraints for the reinforced concrete shear wall body 1, UHPC enclosure 3 and steel plate 4 at the same time. Thus, together with the outer steel plate 4, they form an overall stress system to jointly constrain the edge members of the shear wall structure under the UHPC enclosure 3, realizing secondary reinforcement of the weak stress area of the structure.
[0028] The reinforced concrete shear wall structure of this invention features a novel cross-sectional design and a rational force transmission path, resulting in excellent load-bearing performance. Furthermore, the construction method for this reinforced concrete shear wall structure is simple and convenient, allowing for easy on-site reinforcement of the main body 1 of the reinforced concrete shear wall.
[0029] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.
Claims
1. A UHPC-reinforced reinforced concrete shear wall structure, characterized in that, It includes a reinforced concrete shear wall body, a UHPC enclosure, connectors, and a steel plate; the UHPC enclosure wraps around the periphery of the reinforced concrete shear wall body, the steel plate is placed on the edge surface of the UHPC enclosure, one end of the connector is placed on the outside of the steel plate, and the other end passes through the inside of the steel plate to connect the reinforced concrete shear wall body and the UHPC enclosure. The steel plate is placed on the opposite side edge surfaces of the UHPC enclosure; The steel plate is U-shaped.
2. The UHPC-reinforced reinforced concrete shear wall structure according to claim 1, characterized in that, The connector is an anchor bolt.
3. A construction method for a UHPC-reinforced reinforced concrete shear wall structure according to any one of claims 1-2, characterized in that, Includes the following steps: First, holes need to be drilled in the edge area of the main reinforced concrete shear wall, and the connectors are inserted and fixed with glue. Second, formwork is erected and the UHPC enclosure is poured. The outer steel plate at the edge of the UHPC enclosure also serves as the formwork. Before pouring, the connectors are tightened to prevent the UHPC enclosure from bulging during the pouring process. Finally, after the UHPC enclosure has solidified, the excess formwork is removed, and the reinforcement of the main reinforced concrete shear wall is completed.