CN113323190A - Template-free assembled steel truss-recycled concrete combined shear wall and construction method thereof - Google Patents
Template-free assembled steel truss-recycled concrete combined shear wall and construction method thereof Download PDFInfo
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- CN113323190A CN113323190A CN202110595365.3A CN202110595365A CN113323190A CN 113323190 A CN113323190 A CN 113323190A CN 202110595365 A CN202110595365 A CN 202110595365A CN 113323190 A CN113323190 A CN 113323190A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
- E04B2/60—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal characterised by special cross-section of the elongated members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
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Abstract
本发明提出一种免模板的装配式钢桁架‑再生混凝土组合剪力墙及其施工方法，该剪力墙由钢桁架和钢筋再生混凝土剪力墙两部分组成，将传统的竖向插筋改进为插八边形钢管柱，省去后浇带的施工，加强墙体连接处的强度和刚度，同时八边形更方便于插入U形钢筋和桁架连接节点的施工；钢桁架可大幅提高组合剪力墙的抗震能力和耗能能力；在预制混凝土板接缝处设置咬合接缝口，并在接缝处设置密封止水条和防腐带以实现免模板的施工方式；在预制混凝土板中使用普通混凝土或再生骨料取代率低于30％的再生混凝土，在现浇混凝土芯中使用再生混凝土。在满足使用要求的同时可大量应用再生混凝土，促进装配式再生混凝土剪力墙结构的应用和发展。
The invention proposes a formwork-free assembled steel truss-recycled concrete composite shear wall and a construction method thereof. The shear wall is composed of a steel truss and a reinforced recycled concrete shear wall, and improves the traditional vertical insertion bar. In order to insert the octagonal steel pipe column, the construction of the post-casting belt is omitted, and the strength and rigidity of the wall connection are strengthened. At the same time, the octagon is more convenient to insert the construction of the U-shaped steel bar and the connection node of the truss; the steel truss can greatly improve the combination. Seismic capacity and energy dissipation capacity of shear walls; occlusal joints are set at the joints of precast concrete slabs, and sealing water-stop strips and anti-corrosion tapes are set at the joints to achieve a formwork-free construction method; in precast concrete slabs Use ordinary concrete or recycled concrete with a replacement rate of recycled aggregate less than 30%, and use recycled concrete in the cast-in-place concrete core. While meeting the requirements of use, a large number of recycled concrete can be used to promote the application and development of prefabricated recycled concrete shear wall structures.
Description
Technical Field
The invention relates to a template-free fabricated steel truss-recycled concrete combined shear wall and a construction method thereof, belonging to the technical field of fabricated concrete structures and combined structures.
Background
The prefabricated concrete structure has the advantages of high construction quality, high speed, manpower saving, working environment improvement and the like, but the vertical joint bar connection commonly used for the prefabricated concrete shear wall needs partial formworks to realize the construction of a post-cast strip, and meanwhile, the wall body connection part is still a weak part of the structure because the wall body connection part is not reinforced. On the other hand, the recycled concrete can effectively save sandstone resources and dispose waste concrete, and the recycled concrete is applied to the shear wall, so that the popularization and the use of the recycled concrete are facilitated, but the poor mechanical property of the recycled concrete needs to be improved. The assembled steel truss-recycled concrete combined shear wall is designed, mechanical advantages of a combined structure are used for making up for reduction of mechanical properties of recycled concrete, a connection mode is simplified, mechanical properties of a connection part are enhanced, and the assembled steel truss-recycled concrete combined shear wall has important significance for development of assembled recycled concrete.
Disclosure of Invention
The invention provides a template-free assembled steel truss-recycled concrete combined shear wall and a construction method thereof in order to solve the technical problems of low connection efficiency of an assembled concrete shear wall and the need of improving the mechanical property of recycled concrete, and the template-free assembled steel truss-recycled concrete combined shear wall is mainly applied to multi-layer and high-rise buildings, the traditional vertical inserted bar connection is improved into the inserted octagonal steel pipe column connection, the construction steps of binding steel bars and supporting templates by post-cast strips are omitted, the strength and the rigidity of the wall body connection part are enhanced, and meanwhile, the construction of inserting U-shaped steel bars and the connection nodes of the truss is more convenient by the octagon; the octagonal steel pipe column, the transverse H-shaped steel beam and the oblique angle steel pull rod are reliably connected to form a steel truss, so that the shock resistance and the energy consumption capability of the combined shear wall are greatly improved; setting an occlusion joint opening at the joint of the precast concrete slab, and setting a sealing water stop strip and an anti-corrosion belt at the joint to realize a template-free construction mode; the common concrete or the recycled concrete with the recycled aggregate substitution rate lower than 30 percent is used in the precast concrete plate, the recycled concrete is used in the cast-in-place concrete core, the steel tie bars and the angle steel diagonal draw bars are connected to form a whole, meanwhile, the octagonal steel pipe column also forms a steel pipe recycled concrete member, and the purpose of using a large amount of recycled concrete is achieved.
The invention provides a construction method of a template-free assembled steel truss-recycled concrete combined shear wall, which specifically comprises the following steps:
(1) prefabrication in a factory: the assembled shear wall plate formed by the angle steel diagonal draw bar, the transverse steel bars, the vertical steel bars, the tie steel bars, the U-shaped steel bars and the precast concrete plate is precast in a factory,
firstly, welding stiffening L-shaped connecting plates at two ends of an angle steel diagonal draw bar, then binding transverse steel bars, vertical steel bars and tie steel bars to form a steel bar framework, fixing the angle steel diagonal draw bar on the tie steel bars at a correct position by welding, manufacturing the tail ends of the transverse steel bars into U-shaped steel bars, pouring a formwork and a concrete precast slab after the steel bar framework is finished, wherein the thickness of the concrete precast slab at the position of the U-shaped steel bars does not influence the cross superposition of the U-shaped steel bars, and finally performing standard curing to the designed strength;
(2) assembling on site: after the prefabricated part is transported to a construction site, the position of each fabricated shear wall is determined firstly, then fabricated shear wall boards with one ends not required to be connected are fixed, then the fabricated shear wall boards are overlapped with U-shaped reinforcing steel bars of adjacent fabricated shear wall boards in a crossed mode, the octagonal steel pipe columns penetrate through the U-shaped reinforcing steel bars of the adjacent fabricated shear wall boards in the crossed mode to complete assembly connection of the shear wall boards, joints of the prefabricated concrete boards are spliced in an occluded mode, sealing water stop strips and corrosion-resistant belts are arranged at the joints, the shear wall boards are fixed through supporting in all directions, then two sides of each stiffening L-shaped connecting plate are respectively welded with the octagonal steel pipe columns and the H-shaped steel beams in a reliable mode, the octagonal steel pipe columns are welded with the H-shaped steel beams in a reliable mode, and finally dense pouring of cast-in-place concrete cores is completed.
The template-free assembly type steel truss-recycled concrete combined shear wall comprises two parts, namely a steel truss and a reinforced recycled concrete shear wall, wherein the steel truss comprises two octagonal steel pipe columns, two H-shaped steel beams, two angle steel diagonal members and four stiffening L-shaped connecting plates; the steel bar recycled concrete shear wall comprises a plurality of transverse steel bars, a plurality of vertical steel bars 6, a plurality of tie steel bars, a plurality of U-shaped steel bars, a two-sided precast concrete slab and a cast-in-place concrete core,
two octagonal steel pipe columns 1 and two H-shaped steel beams are alternately and vertically welded to form an outer frame, stiffening L-shaped connecting plates are arranged at four corners of the outer frame, two angle steel diagonal draw bars are positioned in the outer frame in an X shape and are fixed with the steel truss through the stiffening L-shaped connecting plates,
the planar both sides of steel truss transversely vertically have horizontal reinforcing bar and the vertical reinforcing bar of ligature respectively to fix in order to form steel skeleton through the drawknot reinforcing bar, angle steel diagonal draw bar and drawknot steel bar welding, the U-shaped reinforcing bar is made to horizontal reinforcing bar end, and the octagon steel-pipe column passes and lies in the steel skeleton both sides behind the U-shaped reinforcing bar, horizontal reinforcing bar and vertical reinforcing bar position have precast concrete board, accompany the cast-in-place concrete core in the precast concrete board.
Preferably, the strength of the steel used by the octagonal steel pipe column, the H-shaped steel beam, the angle steel diagonal draw bar and the stiffening L-shaped connecting plate is not lower than Q345, and the thickness of the steel used by the octagonal steel pipe column, the H-shaped steel beam, the angle steel diagonal draw bar and the stiffening L-shaped connecting plate is not lower than 5 mm.
Preferably, the distance between the opposite sides of the octagonal steel pipe column is not more than the distance between the inner edges of the U-shaped steel bars, and a plurality of communicating holes are formed in the surface of the octagonal steel pipe column.
Preferably, the width of the angle steel diagonal draw bar is not less than 30 mm.
Preferably, the width of the stiffening L-shaped connecting plate is 10mm wider than each of two side edges of the octagonal steel pipe column, and the height of the stiffening L-shaped connecting plate is not less than 100 mm.
Preferably, the thickness of the edge of the precast concrete plate is based on the condition that the U-shaped steel bars are not prevented from being overlapped in a crossed way; and the joints of the precast concrete plates are provided with seaming joints, and the joints are provided with sealing water stop strips and anti-corrosion belts.
Preferably, the U-shaped reinforcing bars are ends of the transverse reinforcing bars and extend beyond the edges of the wall panel.
Preferably, precast concrete board reliably coheres with horizontal reinforcing bar, vertical reinforcing bar, drawknot reinforcing bar, and thickness is not less than 25 mm.
Preferably, the precast concrete plate is ordinary concrete or recycled concrete with the recycled aggregate substitution rate of less than 30%, the cast-in-place concrete core is recycled concrete, and the strength grade is not lower than C30.
The invention provides a template-free fabricated steel truss-recycled concrete combined shear wall and a construction method thereof. In summary, the combined member has the following advantages:
(1) improve the transverse reinforcement connection mode of the fabricated concrete shear wall. Improve traditional vertical dowel bar connection for inserting the octagonal steel-pipe column and connect, no longer need the work progress of post-cast strip, strengthened the intensity and the rigidity of junction simultaneously, the U-shaped reinforcing bar is inserted more easily in the cross-section of octagon, relies on each other with the flat straight section of U-shaped reinforcing bar more easily, and the level and smooth construction that more is favorable to the truss junction of surface.
(2) The shock resistance and the energy consumption capability of the shear wall are greatly improved. The octagonal steel pipe column, the transverse H-shaped steel beam and the oblique angle steel pull rods are reliably connected to form a steel truss, the steel truss can effectively bear horizontal earthquake action and vertical earthquake action, the two oblique angle steel pull rods arranged in an X shape can effectively improve the energy dissipation capacity of the shear wall, and the stiffening L-shaped connecting plate is arranged to increase the size and rigidity of the steel truss connecting node.
(3) And a template-free construction mode is realized. Because the inserted octagonal steel pipe columns are adopted to connect adjacent walls, the construction process of binding steel bar nodes and supporting templates by post-cast strips is not needed any more, the cast-in-place concrete construction can be completed completely by taking the precast concrete slabs as templates, the joints of the precast concrete slabs are provided with the seaming joints, and the joints are provided with the sealing water stop strips and the anti-corrosion strips so as to realize a template-free construction mode.
(4) The material performance of the recycled concrete is fully utilized. The concrete with better mechanical property is used on the outer side of the wall body, and meanwhile, the octagonal steel pipe column also forms a steel pipe recycled concrete member, so that the recycled concrete can be used in a large amount.
(5) And the integrity of the assembled shear wall is enhanced. The prefabricated concrete plate and the cast-in-place concrete core form a whole through the tie bar connection, the concrete and the steel truss form reliable connection through the angle steel diagonal draw bar and the H-shaped steel beam, the plurality of communicating holes are formed in the surface of the octagonal steel pipe column to communicate the concrete inside and outside the steel pipe, the steel bar connection, the steel connection and the inserting octagonal steel pipe column connection are formed between the fabricated shear wall and the adjacent wall body, and therefore the fabricated steel truss-recycled concrete combined shear wall with good integrity is formed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic perspective view of a formwork-free fabricated steel truss-recycled concrete composite shear wall according to the present invention;
FIG. 2 is a schematic perspective view of the steel truss;
fig. 3 shows three possible distributions of said precast concrete panels;
FIG. 4 shows three possible alternative section steel columns of the octagonal steel pipe column;
FIG. 5 is a schematic plan view of a portion of an assembled steel truss-recycled concrete composite shear wall without joints;
FIG. 6 is a schematic plan view of a portion of an assembled steel truss-recycled concrete composite shear wall connected in a line;
FIG. 7 is a schematic plan view of a portion of a fabricated steel truss-recycled concrete composite shear wall in a "T" connection;
FIG. 8 is a schematic partial plan view of a cross-shaped connected fabricated steel truss-recycled concrete composite shear wall;
description of the figure code: 1-octagonal steel pipe columns; 2-H-section steel beams; 3-angle steel diagonal draw bar; 4-stiffening L-shaped connecting plates; 5-transverse steel bars; 6-vertical steel bars; 7-tying reinforcing steel bars; 8-U-shaped steel bars; 9-precast concrete panel; 10-cast-in-place concrete core.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
the first embodiment is as follows: this embodiment is described with reference to fig. 1 to 8. The template-free assembly type steel truss-recycled concrete combined shear wall comprises two parts, namely a steel truss and a reinforced recycled concrete shear wall, wherein the steel truss comprises two octagonal steel pipe columns 1, two H-shaped steel beams 2, two angle steel diagonal draw bars 3 and four stiffening L-shaped connecting plates 4; the steel bar recycled concrete shear wall comprises a plurality of transverse steel bars 5, a plurality of vertical steel bars 6, a plurality of tie steel bars 7, a plurality of U-shaped steel bars 8, a two-side precast concrete plate 9 and a cast-in-place concrete core 10,
two octagonal steel pipe columns 1 and two H-shaped steel beams 2 are alternately and vertically welded to form an outer frame, stiffening L-shaped connecting plates 4 are arranged at four corners of the outer frame, two angle steel diagonal draw bars 3 are positioned in the outer frame in an X shape and are fixed with the steel truss through the stiffening L-shaped connecting plates 4,
the planar both sides of steel truss transversely vertically have horizontal reinforcing bar 5 and vertical reinforcing bar 6 of ligature respectively to fix in order to form steel skeleton through drawknot reinforcing bar 7, angle steel diagonal draw bar 3 and the welding of drawknot reinforcing bar 7, U-shaped reinforcing bar 8 is made to horizontal reinforcing bar 5 end, and octagonal steel-pipe column 1 passes and lies in the steel skeleton both sides behind the U-shaped reinforcing bar 8, horizontal reinforcing bar 5 and vertical reinforcing bar 6 position have precast concrete board 9, it has cast in situ concrete core 10 to press from both sides in the precast concrete board 9.
The steel strength of the octagonal steel pipe column 1, the H-shaped steel beam 2, the angle steel diagonal draw bar 3 and the stiffening L-shaped connecting plate 4 is not lower than Q345, and the thickness is not lower than 5 mm.
The octagonal steel pipe column 1 can be replaced by a round steel pipe, a round-corner square steel pipe or section steel, the distance between opposite sides of the octagonal steel pipe column 1 is not more than the distance between inner edges of U-shaped steel bars 8, and a plurality of communicating holes are formed in the surface of the octagonal steel pipe column 1.
The width of the angle steel diagonal draw bar 3 is not less than 30mm, and the angle steel diagonal draw bar is welded with a plurality of tie bars 7 to be fixed in position.
The width of the stiffening L-shaped connecting plate 4 is 10mm wider than the two sides of the side length of the octagonal steel pipe column 1, and the height is not less than 100 mm.
The thickness of the edge of the precast concrete plate 9 is based on the condition that the U-shaped steel bars 8 are not prevented from being overlapped in a crossed manner; and an occlusion joint opening is arranged at the joint of the precast concrete plate 9, and a sealing water stop strip and an anti-corrosion belt are arranged at the joint.
The U-shaped reinforcing steel bars 8 are the tail ends of the transverse reinforcing steel bars 5 and extend out of the edge of the wallboard.
The precast concrete plate 9 is made of common concrete or recycled concrete with the recycled aggregate substitution rate lower than 30%, the cast-in-place concrete core 10 is made of recycled concrete, and the strength grade is not lower than C30.
The vertical steel bars 6 are connected with the vertical steel bars of the adjacent wall bodies through grouting sleeves, spiral stirrup slurry anchor lap joints or corrugated pipe slurry anchors, and the octagonal steel pipe columns 1 and the H-shaped steel beams 2 are connected with the steel pipe columns and the H-shaped steel beams of the adjacent wall bodies through welding or other connection.
The width of the H-shaped steel beam 2 is not more than 80 mm.
The precast concrete plate 9 is made of common concrete or recycled concrete, the cast-in-place concrete core 10 is made of recycled concrete, and the strength grade is not lower than C30.
The transverse steel bars 5, the vertical steel bars 6 and the tie steel bars 7 are designed according to the concrete structure design Specification (GB 50010-2010).
The invention aims to design a template-free assembled steel truss-recycled concrete combined shear wall, which comprises two parts, namely a steel truss and a shear wall, wherein the traditional vertical joint bar connection is improved into the octagonal steel pipe column connection, the transverse steel bar connection mode of the assembled concrete shear wall is improved, the shock resistance and the energy consumption capability of the shear wall are greatly improved by arranging the steel truss, the seaming joint is arranged at the seam of a precast concrete slab, the template-free construction mode is realized, the material performance of recycled concrete is fully utilized, and the assembled steel truss-recycled concrete combined shear wall with good integrity is formed.
The construction method of the template-free assembly type steel truss-recycled concrete combined shear wall comprises two parts of factory prefabrication and field assembly.
Prefabrication in a factory: firstly, welding stiffening L-shaped connecting plates 4 at two ends of an angle steel diagonal draw bar 3, then binding transverse steel bars 5, vertical steel bars 6 and tie steel bars 7 to form a steel bar framework, meanwhile, welding the angle steel diagonal draw bar 3 on the tie steel bars 7 to fix the correct position, and making the tail ends of the transverse steel bars 5 into U-shaped steel bars 8, wherein the subsequent processes of the U-shaped steel bars 8 need to be overlapped in a crossed manner with adjacent walls, the reasonable height position of the U-shaped steel bars is determined, and after the steel bar framework is finished, formwork erecting and pouring work of precast concrete slabs 9 are carried out, because the steel bar framework is manufactured in a factory, the accurate position of the steel bars is ensured as far as possible, the connection is reliable, the concrete shape is regular, the thickness of the precast concrete slabs 9 at the position of the U-shaped steel bars 8 does not influence the overlapping in a crossed manner of the U-shaped steel bars 8, and finally, the standard maintenance is carried out to the designed strength.
Assembling on site: after the prefabricated parts are transported to a construction site, the position of each fabricated shear wall is determined at first, fabricated shear wall boards without connection at one ends are fixed at first, then, the fabricated shear wall boards are overlapped with U-shaped steel bars 8 of adjacent fabricated shear wall boards in a crossed mode, the octagonal steel pipe column 1 penetrates through the U-shaped steel bars 8 of the adjacent fabricated shear wall boards in the crossed mode to complete assembly connection of the shear wall boards, joints of prefabricated concrete plates 9 are spliced in an occluded mode, sealing water stop strips and corrosion prevention belts are arranged at the joints, the shear wall boards are fixed through supporting in all directions, then, two sides of a stiffening L-shaped connecting plate 4 are respectively and reliably welded with the octagonal steel pipe column 1 and the H-shaped steel beam 2, the octagonal steel pipe column 1 is reliably welded with the H-shaped steel beam 2, and finally, dense pouring of the cast-in-place concrete core 10 is completed.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and that the reasonable combination of the features described in the above-mentioned embodiments can be made, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
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Cited By (2)
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| CN115726496A (en) * | 2022-11-15 | 2023-03-03 | 海南大学 | Anti-seismic superposed shear wall structure and construction method thereof |
| CN118517094A (en) * | 2024-07-22 | 2024-08-20 | 华侨大学 | Concrete shear wall with prefabricated reinforcement cage and templates and construction method |
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