A steel-concrete composite structure with ECC treatment in negative bending moment area and construction method thereof

Abstract

The present invention relates to the technical field of ECC steel-concrete composite structures, and discloses a negative moment zone ECC-treated steel-concrete composite structure, comprising a bottom plate, wherein the four corners of the bottom plate are fixedly connected with support blocks, the upper surface of the support blocks is provided with a first circular groove, and the side surface of the bottom plate is provided with a first threaded groove. The negative moment zone ECC-treated steel-concrete composite structure is provided with a connecting strip, a third circular groove and a round rod. When in use, the connecting strip is provided to limit the splicing plate, the first slide groove and the second slide groove are provided to limit the splicing plate, the second circular groove, the first circular groove and the third circular groove are provided to enable the round rod to be installed, and the round rod is provided to enable the block, the connecting strip and the bottom plate to be connected, so that the staff do not need to prepare a large number of steel cages, the equipment is simple to install and the work efficiency is improved, and the problem of requiring the staff to prepare a large number of steel cages on site, consuming a large amount of human resources and long working hours is solved.

Description

Technical Field

[0001] The invention relates to the technical field of ECC steel-concrete composite structures, and in particular to a negative moment zone ECC treated steel-concrete composite structure and a construction method thereof. Background Art

[0002] ECC high ductility concrete, also known as bendable concrete, is a fiber-reinforced composite material based on cement, quartz sand, etc. It has high ductility, high damage resistance, high durability, high strength, compression resistance, tensile resistance, and good crack control ability. It is suitable for all structures that are easy to bend, especially for representative curved structures of civil engineering: slabs and beams of reinforced concrete bridges.

[0003] For example, a prefabricated steel-concrete composite structure disclosed in a Chinese patent with publication number CN113404165A comprises two steel-concrete base columns and two cross beams connected between the two steel-concrete base columns, the surface sliding sleeves of the steel-concrete base columns are provided with two base sleeves, and an end sleeve is fixed on one side of the base sleeve, the two ends of the cross beam are respectively embedded in the inner sides of two parallel end sleeves, a splicing structure is provided between the cross beam and the end sleeves, an adjustment mechanism is provided between the base sleeves and the steel-concrete base columns, the steel-concrete base columns comprise a steel base column and a concrete inner base column arranged on the inner side of the steel base column; by providing an adjustment mechanism composed of side base blocks, pull frames, limit pins, limit grooves, inner slide grooves, tubular springs and push blocks, the splicing positions of the steel-concrete base columns and the cross beams can be flexibly adjusted according to actual on-site conditions, which greatly improves the assembly flexibility and convenience of the steel-concrete composite structure and brings convenience to operators in building the steel-concrete composite structure on site.

[0004] In the prior art, the common ECC steel-concrete composite structure for negative bending zone needs workers to prepare a large number of steel cages on site when in use, which consumes a lot of human resources and long working hours. In addition, a large number of wooden boards are needed for auxiliary support when pouring concrete, and the wooden boards need to be disassembled after the concrete solidifies. In addition, bricks need to be used for building and filling when pouring the wall, which reduces the speed of on-site construction. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a negative bending moment zone ECC treated steel-concrete composite structure, which has the advantages of not requiring workers to prepare a large number of steel cages, simple equipment installation and improved work efficiency, and the equipment does not need to use wooden materials for assistance during construction, eliminating the process of loading and unloading the plates in the prior art, and reducing the time for workers to build brick walls through prefabricated panels, thereby improving the on-site construction speed.

[0006] In order to solve the above technical problems, the embodiment of the present invention provides a steel-concrete composite structure with ECC treatment in a negative moment zone, which specifically adopts the following technical solutions:

[0007] A negative moment zone ECC treated steel-concrete composite structure, comprising: a bottom plate, four corners of the bottom plate are fixedly connected with support blocks, the upper surface of the support blocks is provided with a first circular groove, the side of the bottom plate is provided with a first thread groove, both sides of the first thread groove are provided with slots, the upper surface of the bottom plate is movably connected with a splicing mechanism, one side of the splicing mechanism is provided with a connecting mechanism, and the other side of the connecting mechanism is provided with a prefabricated mechanism;

[0008] A splicing mechanism, comprising a splicing plate, a second thread groove, a main nut, an insert rod and a clamping groove;

[0009] A connecting mechanism, the connecting mechanism comprising a connecting strip, a clamping block, a round rod, a first connecting plate and a first connecting groove;

[0010] A prefabricated structure comprises a prefabricated plate, a second connecting plate, connecting nuts and steel bars.

[0011] As a preferred improvement method of the ECC-treated steel-concrete composite structure in the negative bending moment zone provided by the present invention, further, the side surface of the splicing plate is movably connected to the side surface of the base plate, a groove is opened on one side of the splicing plate, the second thread groove is opened on the side surface of the inner wall of the groove, the surface of the main nut is threadedly connected to the surface of the inner wall of the second thread groove, one end of the main nut extends through the second thread groove and is threadedly connected to the surface of the inner wall of the first thread groove, one end of the insertion rod is fixedly connected to the side surface of the splicing plate, the surface of the insertion rod is movably connected to the surface of the inner wall of the slot, a reserved groove is opened on one side of the splicing plate, and the card slot is opened on both sides of the splicing plate.

[0012] As a preferred improvement method for the ECC treatment of steel-concrete composite structure in the negative bending moment zone provided by the present invention, further, the bottom of the connecting strip is movably connected to the upper surface of the support block, a first slide groove is provided on one side of the connecting strip, and a second slide groove is provided on the other side of the connecting strip, the side of the clamping block is movably connected to the side of the first slide groove and the inner wall of the second slide groove, one end of the clamping block is movably connected to the side of the inner wall of the clamping groove, a second circular groove is provided on the upper surface of the clamping block, a third circular groove is provided on the top of the connecting strip, the bottom of the inner wall of the third circular groove extends through the bottom of the inner wall of the second circular groove, the surface of the round rod is movably connected to the surfaces of the first circular groove, the second circular groove and the inner wall of the third circular groove respectively, the side of the connecting strip is fixedly connected to the side of the first connecting plate, and the first connecting groove is provided on the side of the first connecting plate.

[0013] As a preferred improvement method of the ECC-treated steel-concrete composite structure in the negative bending moment zone provided by the present invention, further, the side of the prefabricated panel is movably connected to the side of the connecting strip, the side of the prefabricated panel is provided with a square groove, the side of the second connecting plate is movably connected to the side of the inner wall of the square groove, the front of the second connecting plate is provided with a clamping groove, the side of the first connecting plate is movably connected to the side of the inner wall of the clamping groove, the front of the second connecting plate is provided with a second connecting groove, the first connecting groove and the surface of the inner wall of the second connecting groove are movably connected with a connecting nut, and the side of the second connecting plate is fixedly connected with a steel bar.

[0014] As a preferred improvement method for the ECC treatment of a steel-concrete composite structure in a negative bending zone provided by the present invention, further, the number of the second connecting plates is four, and the four second connecting plates are fixedly connected to the two ends of the steel bar respectively.

[0015] As a preferred improvement method of the ECC-treated steel-concrete composite structure in the negative bending moment zone provided by the present invention, further, there are four splicing plates, and the side surfaces of the four splicing plates are movably connected to the side surfaces of the bottom plate.

[0016] As a preferred improvement method for ECC treatment of a steel-concrete composite structure in a negative bending moment zone provided by the present invention, further, the number of the first slide grooves and the second slide grooves is five, and the first slide grooves and the second slide grooves are arranged on the sides of the connecting strip.

[0017] As a preferred improvement method for the ECC treatment of the steel-concrete composite structure in the negative bending moment zone provided by the present invention, further, there are several clamping blocks, and the several clamping blocks are all movably connected to the first slide groove and the second slide groove.

[0018] A negative moment zone ECC treated steel-concrete composite structure and construction method, characterized by comprising the following steps:

[0019] Step 1: First, place the base plate in a fixed position, stand up the splicing plate, insert the insertion rod into the slot, make the side of the splicing plate contact the side of the base plate, splice the first thread groove and the second thread groove, and thread the main nut with the second thread groove and the first thread groove so that one end of the splicing plate and the base plate can be fixed;

[0020] Step 2: Secondly, align the bottom of the connecting strip with the upper surface of the support block, insert the card block into the first slide groove and the second slide groove, and insert one end of the card block into the card groove, so that the side of the splicing plate and the connecting strip can be engaged with each other, insert the round rod into the third circular groove, and the card block can be limited by the second circular groove, and the connecting strip can be fixed by the first circular groove, so that the splicing plate and the connecting strip can be engaged and limited;

[0021] Step three: Finally, the second connecting plate on the side of the prefabricated plate is clamped with the first connecting plate on the side of the connecting strip, and the first connecting plate and the second connecting plate are limited by connecting nuts so that the prefabricated plate can be fixed.

[0022] The present invention has the following beneficial effects:

[0023] 1. In the present invention, by arranging the connecting strip, the first slide groove, the second slide groove, the clamping block, the second circular groove, the third circular groove and the round rod, when in use, the splicing plate can be limited by the arrangement of the connecting strip, the first slide groove and the second slide groove can be used to limit the splicing plate, the second circular groove, the first circular groove and the third circular groove can be used to install the round rod, and the clamping block, the connecting strip and the bottom plate can be clamped by the arrangement of the round rod, thereby achieving the effect of not requiring staff to prepare a large number of steel cages, simplifying equipment installation and improving work efficiency, and solving the problem of requiring staff to prepare a large number of steel cages on site, consuming a large amount of human resources and long working hours.

[0024] 2. In the present invention, through the arrangement of the splicing plate, the groove, the second thread groove, the main nut, the clamping slot, the plug rod and the reserved slot, when in use, the splicing plate can be movably connected to the side of the base plate through the arrangement of the plug rod and the slot, the main nut can limit the splicing plate through the arrangement of the first thread groove and the second thread groove, the main nut can be installed through the arrangement of the groove, and the clamping block can limit the splicing plate through the arrangement of the clamping slot, so that the equipment does not need to use wooden board materials for assistance during construction, and the process of loading and unloading the board in the prior art is eliminated, which solves the problem of needing a large amount of wooden board materials for auxiliary support when pouring concrete, and the need to disassemble the wooden boards after waiting for the concrete to solidify.

[0025] 3. In the present invention, through the arrangement of the first connecting plate, the first connecting groove, the prefabricated plate, the second connecting plate, the connecting nuts and the steel bars, when in use, the arrangement of the first connecting plate and the first connecting groove enables the prefabricated plate to be installed with the first connecting plate through the second connecting plate and the second connecting groove, and is limited by the connecting nuts, and the first connecting plate and the second connecting plate are clamped together by the arrangement of the clamping groove, and the second connecting plates can be reinforced by the arrangement of the steel bars, thereby achieving the effect of reducing the time for workers to build brick walls through the prefabricated plates and improving the speed of on-site construction, and solving the problem that bricks are needed to build and fill the wall when pouring it, which reduces the speed of on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a structural schematic diagram of a steel-concrete composite structure with ECC treatment in a negative moment zone proposed by the present invention;

[0028] Figure 2 The invention proposes a negative moment zone ECC treatment steel-concrete composite structure Figure 1 Schematic diagram of some structures viewed from above;

[0029] Figure 3 The invention proposes a negative moment zone ECC treatment steel-concrete composite structure Figure 2 Exploded top view of the midsole structure;

[0030] Figure 4 The invention proposes a negative moment zone ECC treatment steel-concrete composite structure Figure 1 A magnified schematic diagram of the middle splicing plate structure;

[0031] Figure 5 The invention proposes a negative moment zone ECC treatment steel-concrete composite structure Figure 1 Explosion diagram of the middle connecting strip structure;

[0032] Figure 6 The invention proposes a negative moment zone ECC treatment steel-concrete composite structure Figure 1 A magnified schematic diagram of the precast panel structure;

[0033] Figure 7 The invention proposes a negative moment zone ECC treatment steel-concrete composite structure Figure 6 An enlarged schematic diagram of the second connecting plate structure.

[0034] Legend:

[0035] 1. Base plate; 2. Support block; 3. First circular groove; 4. First threaded groove; 5. Slot; 6. Joint plate; 7. Groove; 8. Second threaded groove; 9. Main nut; 10. Insert rod; 11. Reserved groove; 12. Clamping groove; 13. Connecting strip; 14. First slide groove; 15. Second slide groove; 16. Clamping block; 17. Second circular groove; 18. Third circular groove; 19. Round rod; 20. First connecting plate; 21. First connecting groove; 22. Prefabricated plate; 23. Square groove; 24. Second connecting plate; 25. Clamping groove; 26. Second connecting groove; 27. Connecting nut; 28. Rebar. DETAILED DESCRIPTION

[0036] See also Figure 1-7, a negative moment zone ECC treated steel-concrete composite structure, comprising: a bottom plate 1, four corners of the bottom plate 1 are fixedly connected with support blocks 2, the upper surface of the support blocks 2 is provided with a first circular groove 3, the side of the bottom plate 1 is provided with a first thread groove 4, both sides of the first thread groove 4 are provided with slots 5, the upper surface of the bottom plate 1 is movably connected with a splicing mechanism, one side of the splicing mechanism is provided with a connecting mechanism, and the other side of the connecting mechanism is provided with a prefabricated mechanism;

[0037] The splicing mechanism includes a splicing plate 6, a second thread groove 8, a main nut 9, an insert rod 10 and a clamping groove 12;

[0038] The connecting mechanism includes a connecting strip 13, a clamping block 16, a round rod 19, a first connecting plate 20 and a first connecting groove 21;

[0039] The prefabricated mechanism includes a prefabricated plate 22 , a second connecting plate 24 , connecting nuts 27 and steel bars 28 .

[0040] Among them; the side of the splicing plate 6 is movably connected to the side of the base plate 1, a groove 7 is provided on one side of the splicing plate 6, and the main nut 9 can be installed through the setting of the groove 7, the second thread groove 8 is provided on the side of the inner wall of the groove 7, and the surface of the main nut 9 is threadedly connected to the surface of the inner wall of the second thread groove 8. The setting of the first thread groove 4 and the second thread groove 8 enables the main nut 9 to limit the splicing plate 6, one end of the main nut 9 extends through the second thread groove 8 and is threadedly connected to the surface of the inner wall of the first thread groove 4, one end of the insertion rod 10 is fixedly connected to the side of the splicing plate 6, and the splicing plate 6 can be movably connected to the side of the base plate 1 by the setting of the insertion rod 10 and the slot 5, and the surface of the insertion rod 10 is movably connected to the surface of the inner wall of the slot 5. A reserved groove 11 is provided on one side of the splicing plate 6, and the steel frame can be installed inside by the setting of the reserved groove 11. The card slot 12 is provided on both sides of the splicing plate 6, and the card block 16 can limit the splicing plate 6 by the setting of the card slot 12.

[0041] Among them; the bottom of the connecting strip 13 is movably connected to the upper surface of the support block 2, and the splicing plate 6 can be limited by the setting of the connecting strip 13. A first slide groove 14 is opened on one side of the connecting strip 13, and a second slide groove 15 is opened on the other side of the connecting strip 13. The setting of the first slide groove 14 and the second slide groove 15 enables the block 16 to limit the splicing plate 6. The side of the block 16 is movably connected to the side of the inner wall of the first slide groove 14 and the second slide groove 15. One end of the block 16 is movably connected to the side of the inner wall of the slot 12. A second circular groove 17 is opened on the upper surface of the block 16. The connecting strip A third circular groove 18 is provided on the top of 13, and the round rod 19 can be installed through the arrangement of the second circular groove 17, the first circular groove 3 and the third circular groove 18. The bottom of the inner wall of the third circular groove 18 extends through the bottom of the inner wall of the second circular groove 17. The surface of the round rod 19 is movably connected to the surfaces of the inner walls of the first circular groove 3, the second circular groove 17 and the third circular groove 18 respectively. The side of the connecting strip 13 is fixedly connected to the side of the first connecting plate 20. The first connecting groove 21 is provided on the side of the first connecting plate 20. The arrangement of the round rod 19 enables the clamping block 16, the connecting strip 13 and the bottom plate 1 to be clamped.

[0042] Among them; the side of the prefabricated plate 22 is movably connected to the side of the connecting strip 13, a square groove 23 is provided on the side of the prefabricated plate 22, the side of the second connecting plate 24 is movably connected to the side of the inner wall of the square groove 23, and a clamping groove 25 is provided on the front of the second connecting plate 24. The first connecting plate 20 is clamped with the second connecting plate 24 through the setting of the clamping groove 25, and the side of the first connecting plate 20 is movably connected to the side of the inner wall of the clamping groove 25. Through the setting of the first connecting plate 20 and the first connecting groove 21, the prefabricated plate 22 can be installed with the first connecting plate 20 through the second connecting plate 24 and the second connecting groove 26. A second connecting groove 26 is provided on the front of the second connecting plate 24, and the surface of the first connecting groove 21 and the inner wall of the second connecting groove 26 is movably connected with a connecting nut 27, and the second connecting plate 24 is limited by the connecting nut 27. The side of the second connecting plate 24 is fixedly connected with a steel bar 28, and the second connecting plates 24 can be reinforced through the setting of the steel bar 28.

[0043] There are four second connecting plates 24 , and the four second connecting plates 24 are fixedly connected to both ends of the steel bar 28 .

[0044] There are four splicing plates 6, and the sides of the four splicing plates 6 are movably connected to the sides of the bottom plate 1.

[0045] There are five first slide grooves 14 and second slide grooves 15 , and the first slide grooves 14 and second slide grooves 15 are arranged on the side of the connecting strip 13 .

[0046] There are several clamping blocks 16 , and the several clamping blocks 16 are movably connected to the first sliding groove 14 and the second sliding groove 15 .

[0047] A negative moment zone ECC treated steel-concrete composite structure and construction method, characterized by comprising the following steps:

[0048] Step 1: First, place the base plate 1 in a fixed position, stand up the splicing plate 6, insert the insertion rod 10 into the slot 5, so that the side of the splicing plate 6 contacts the side of the base plate 1, the first thread groove 4 and the second thread groove 8 are spliced, and the main nut 9 is threadedly connected with the second thread groove 8 and the first thread groove 4, so that the splicing plate 6 and one end of the base plate 1 can be fixed;

[0049] Step 2: Secondly, align the bottom of the connecting strip 13 with the upper surface of the support block 2, insert the clamping block 16 into the first slide groove 14 and the second slide groove 15, and one end of the clamping block 16 enters the inside of the clamping groove 12, so that the side of the splicing plate 6 and the connecting strip 13 can be clamped with each other, insert the round rod 19 into the third circular groove 18, and the clamping block 16 can be limited by the second circular groove 17, and the connecting strip 13 can be fixed by the first circular groove 3, so that the splicing plate 6 and the connecting strip 13 can be clamped and limited;

[0050] Step three: Finally, the second connecting plate 24 on the side of the prefabricated plate 22 is clamped with the first connecting plate 20 on the side of the connecting strip 13, and the first connecting plate 20 and the second connecting plate 24 are limited by the connecting nut 27, so that the prefabricated plate 22 can be fixed.

[0051] In summary, the complete working process and use principle of the present invention are as follows: when in use, the base plate 1 is placed in a fixed position, the splicing plate 6 is erected, and the insertion rod 10 is inserted into the slot 5 so that the side of the splicing plate 6 contacts the side of the base plate 1, and the splicing plate 6 can be movably connected to the side of the base plate 1 through the setting of the insertion rod 10 and the slot 5, and the first thread groove 4 and the second thread groove 8 are spliced, and the main nut 9 is threadedly connected with the second thread groove 8 and the first thread groove 4 so that the splicing plate 6 and one end of the base plate 1 can be fixed, and the bottom of the connecting strip 13 is aligned with the upper surface of the support block 2, and the block 16 is inserted into the first slide groove 14 and the second slide groove 15. The block 16 can limit the splicing plate 6 through the setting of the first slide groove 14 and the second slide groove 15, and one end of the block 16 Enter the slot 12, and through the setting of the slot 12, the block 16 can limit the splicing plate 6, so that the side of the splicing plate 6 and the connecting strip 13 can be clamped with each other, and the round rod 19 is inserted into the third circular groove 18. The block 16 can be limited by the second circular groove 17. The round rod 19 can be installed through the setting of the second circular groove 17, the first circular groove 3 and the third circular groove 18, so that the splicing plate 6 and the connecting strip 13 can be clamped and limited. The first connecting plate 20 is clamped with the second connecting plate 24 through the setting of the clamping groove 25. By clamping the second connecting plate 24 on the side of the prefabricated plate 22 with the first connecting plate 20 on the side of the connecting strip 13, the first connecting plate 20 and the second connecting plate 24 are limited by the connecting nut 27, so that the prefabricated plate 22 can be fixed.

[0052] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A negative moment zone ECC treated steel-concrete composite structure, comprising a bottom plate (1), characterized in that: The four corners of the bottom plate (1) are fixedly connected to support blocks (2), the upper surface of the support block (2) is provided with a first circular groove (3), the side surface of the bottom plate (1) is provided with a first thread groove (4), both sides of the first thread groove (4) are provided with slots (5), the upper surface of the bottom plate (1) is movably connected to a splicing mechanism, one side of the splicing mechanism is provided with a connecting mechanism, and the other side of the connecting mechanism is provided with a prefabricated mechanism; A splicing mechanism, the splicing mechanism comprising a splicing plate (6), a second thread groove (8), a main nut (9), an insert rod (10) and a clamping groove (12); A connecting mechanism, the connecting mechanism comprising a connecting strip (13), a clamping block (16), a round rod (19), a first connecting plate (20) and a first connecting groove (21); A prefabricated structure, the prefabricated structure comprising a prefabricated plate (22), a second connecting plate (24), a connecting nut (27) and a steel bar (28); The side surface of the splicing plate (6) is movably connected to the side surface of the bottom plate (1); a groove (7) is provided on one side of the splicing plate (6); the second thread groove (8) is provided on the side surface of the inner wall of the groove (7); the surface of the main nut (9) is threadedly connected to the surface of the inner wall of the second thread groove (8); one end of the main nut (9) extends through the second thread groove (8) and is threadedly connected to the surface of the inner wall of the first thread groove (4); one end of the insertion rod (10) is fixedly connected to the side surface of the splicing plate (6); the surface of the insertion rod (10) is movably connected to the surface of the inner wall of the slot (5); a reserved groove (11) is provided on one side of the splicing plate (6); and the clamping groove (12) is provided on both sides of the splicing plate (6); The bottom of the connecting strip (13) is movably connected to the upper surface of the support block (2); a first slide groove (14) is provided on one side of the connecting strip (13); a second slide groove (15) is provided on the other side of the connecting strip (13); a side surface of the clamping block (16) is movably connected to the side surfaces of the inner walls of the first slide groove (14) and the second slide groove (15); one end of the clamping block (16) is movably connected to the side surface of the inner wall of the clamping groove (12); and a second circular groove (17) is provided on the upper surface of the clamping block (16). ), a third circular groove (18) is formed on the top of the connecting strip (13), the bottom of the inner wall of the third circular groove (18) extends through the bottom of the inner wall of the second circular groove (17), the surface of the round rod (19) is movably connected to the surfaces of the inner walls of the first circular groove (3), the second circular groove (17) and the third circular groove (18), respectively, the side surface of the connecting strip (13) is fixedly connected to the side surface of the first connecting plate (20), and the first connecting groove (21) is formed on the side surface of the first connecting plate (20); The side surface of the prefabricated plate (22) is movably connected to the side surface of the connecting strip (13); a square groove (23) is provided on the side surface of the prefabricated plate (22); the side surface of the second connecting plate (24) is movably connected to the side surface of the inner wall of the square groove (23); a clamping groove (25) is provided on the front surface of the second connecting plate (24); the side surface of the first connecting plate (20) is movably connected to the side surface of the inner wall of the clamping groove (25); a second connecting groove (26) is provided on the front surface of the second connecting plate (24); a connecting nut (27) is movably connected to the surface of the first connecting groove (21) and the inner wall of the second connecting groove (26); and a steel bar (28) is fixedly connected to the side surface of the second connecting plate (24).

2. The negative moment zone ECC treated steel-concrete composite structure according to claim 1, characterized in that: There are four second connecting plates (24), and the four second connecting plates (24) are respectively fixedly connected to two ends of the steel bar (28).

3. The negative moment zone ECC treated steel-concrete composite structure according to claim 1, characterized in that: There are four splicing plates (6), and the side surfaces of the four splicing plates (6) are all movably connected to the side surfaces of the bottom plate (1).

4. The negative moment zone ECC treated steel-concrete composite structure according to claim 1, characterized in that: The number of the first sliding grooves (14) and the second sliding grooves (15) is five, and the first sliding grooves (14) and the second sliding grooves (15) are arranged on the side of the connecting strip (13).

5. The negative moment zone ECC treated steel-concrete composite structure according to claim 1, characterized in that: There are a plurality of the clamping blocks (16), and the plurality of clamping blocks (16) are all movably connected to the first sliding groove (14) and the second sliding groove (15).

6. A method for constructing a negative moment zone ECC treated steel-concrete composite structure according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: First, place the base plate (1) in a fixed position, stand the splicing plate (6), insert the insertion rod (10) into the slot (5), so that the side of the splicing plate (6) contacts the side of the base plate (1), the first thread groove (4) and the second thread groove (8) are spliced, and the main nut (9) is threadedly connected with the second thread groove (8) and the first thread groove (4), so that one end of the splicing plate (6) and the base plate (1) can be fixed; Step 2: Next, align the bottom of the connecting strip (13) with the upper surface of the support block (2), insert the clamping block (16) into the first slide groove (14) and the second slide groove (15), and insert one end of the clamping block (16) into the inside of the clamping groove (12), so that the side surface of the splicing plate (6) and the connecting strip (13) can be mutually clamped, insert the round rod (19) into the third circular groove (18), and the clamping block (16) can be limited by the second circular groove (17), and the connecting strip (13) can be fixed by the first circular groove (3), so that the splicing plate (6) and the connecting strip (13) can be clamped and limited; Step 3: Finally, the second connecting plate (24) on the side of the prefabricated plate (22) is clamped with the first connecting plate (20) on the side of the connecting strip (13), and the first connecting plate (20) and the second connecting plate (24) are limited by the connecting nut (27), so that the prefabricated plate (22) can be fixed.

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