Space truss tie piece and concrete sandwich wallboard
By combining spatial truss tie rods and EPS foam insulation layers, the problems of insufficient shear force transfer and shear bearing capacity of precast concrete sandwich wall panels are solved, achieving efficient multi-directional shear force transfer and elimination of thermal bridge effect, thus improving the safety and thermal insulation performance of the building.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ZHONGHONG LOW CARBON BUILDING TECH CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-21
AI Technical Summary
Existing precast concrete sandwich wall panels have shortcomings in shear force transfer capacity and shear bearing capacity, especially in high-rise buildings or buildings in high-intensity seismic zones. They also have thermal bridging effects that lead to a decrease in thermal insulation performance.
The space truss tie members, including tie zones with a square pyramidal structure, are composed of horizontal and inclined chords to enhance shear force transfer capacity. They are made of fiber-reinforced resin composite materials and combined with EPS foam insulation layers and geopolymer concrete blades to form multi-directional shear force transfer and reinforced connections.
It improves the shear bearing capacity of the wall panels, solves the thermal bridging effect, enhances the safety and reliability of the structure, and reduces carbon emissions while making full use of industrial by-products.
Smart Images
Figure CN224148986U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of construction, specifically a space truss tie rod and a concrete sandwich wall panel. Background Technology
[0002] Traditional building wall panels and floor slabs are typically made of solid reinforced concrete slabs. However, due to their poor thermal insulation performance, buildings using solid reinforced concrete slabs often suffer from significant energy losses. To improve the thermal insulation effect of buildings, precast concrete sandwich wall panels have emerged. Precast concrete sandwich wall panels mainly consist of concrete leaf slabs on both sides, a thermal insulation layer in the middle, and tie rods connecting the two concrete leaf slabs. In precast concrete sandwich wall panels, the tie rods, as key components connecting the two concrete leaf slabs, have a significant impact on the overall performance of the precast concrete sandwich wall panel due to their shear force transfer capacity.
[0003] Currently, conventional precast concrete sandwich wall panels typically use concrete blocks or reinforcing bars as tie rods. While these panels achieve high overall performance, they also exhibit significant thermal bridging, reducing their insulation properties. To address the impact of thermal bridging, fiber-reinforced resin composite materials have been used to create rod-shaped tie rods during panel manufacturing. However, these tie rods have weak shear capacity, making them unsuitable for high-rise buildings or those in high-seismic-intensity areas where shear strength is critical. Therefore, a solution is urgently needed. Utility Model Content
[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a space truss tie member and a concrete sandwich wall panel. This utility model solves the impact of thermal bridging while significantly improving the shear bearing capacity of the wall panel.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A spatial truss tie member includes two sets of tie zones with a regular square pyramidal structure, the tips of the two tie zones being opposite each other and thus arranged symmetrically from top to bottom; the axis of the spatial truss tie member is arranged along the direction perpendicular to the wall panel surface.
[0007] As a further embodiment of this utility model: the tie zone consists of four sets of horizontal chords and four sets of inclined chords to form a regular square pyramidal frame structure, wherein the horizontal chords and inclined chords are all cylindrical rods with the same diameter.
[0008] As a further improvement of this utility model, the diameter of the horizontal chord and the inclined chord is 6mm to 10mm.
[0009] As a further improvement of this utility model, the included angle between the inclined chord and the axis of the space truss tie member is 30° to 60°.
[0010] A concrete sandwich wall panel includes an insulation layer and concrete outer leaf panels and concrete inner leaf panels located on both sides of the insulation layer. The space truss tie member penetrates the insulation layer and connects and positions the concrete outer leaf panels and the concrete inner leaf panels.
[0011] As a further improvement of this utility model: along the direction perpendicular to the wall panel surface, the total height of the space truss tie member is 80mm to 160mm.
[0012] As a further embodiment of this utility model: the space truss tie members are arranged in a rectangular array within the wall panel, and the spacing between adjacent space truss tie members is 300mm to 600mm.
[0013] As a further embodiment of this utility model: the thickness of the outer concrete leaf plate and the inner concrete leaf plate is 50mm to 100mm, and the thickness of the insulation layer is 30mm to 100mm.
[0014] As a further improvement of this utility model: both the outer concrete leaf plate and the inner concrete leaf plate are provided with steel mesh, and the insulation layer is EPS foam insulation board.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. This utility model uses a space truss tie member made of composite materials. Compared with traditional tie members, it can more effectively transfer the shear force between concrete blades, improve the overall stress performance of the wall panel, avoid the unidirectional force transmission of the tie member, realize multi-directional shear force transmission, solve the impact of thermal bridge effect, and greatly improve the shear bearing capacity of the wall panel.
[0017] 2. The space truss tie rod of this utility model adopts a unique end anchoring method, which further enhances the connection between the tie rod and the wall panel and improves the safety and reliability of the structure.
[0018] 3. This utility model reduces carbon emissions and fully utilizes industrial by-products by using geopolymer concrete to make the inner and outer concrete blades. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model.
[0020] Figure 2 This is a structural schematic diagram of the space truss tie member in this utility model.
[0021] Figure 3This is a comparison chart of the ultimate flexural bearing capacity obtained by software analysis and the ultimate flexural bearing capacity calculated by this utility model.
[0022] In the diagram: 1. Outer concrete leaf slab; 2. Insulation layer; 3. Inner concrete leaf slab; 4. Reinforcing mesh;
[0023] 5. Spatial truss tie members; 51. Tie zone; 511. Horizontal chord; 512. Inclined chord. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figures 1-3 In this embodiment of the utility model, a space truss tie member and a concrete sandwich wall panel are provided. The specific structure of the sandwich wall panel includes an insulation layer 2 and concrete outer leaf plates 1 and concrete inner leaf plates 3 located on both sides of the insulation layer 2. The concrete outer leaf plates 1 and concrete inner leaf plates 3 are made of polymer concrete, and steel mesh 4 is provided inside both the concrete outer leaf plates 1 and concrete inner leaf plates 3. The insulation layer 2 is an EPS foam insulation board 2, and a space truss tie member 5 is integrally fixed on the insulation layer 2, which is tied and positioned to the concrete outer leaf plates 1 and concrete inner leaf plates 3. The space truss tie member 5 is made of fiber reinforced resin composite material.
[0026] The space truss tie member 5 includes two sets of frame-type tie zones 51. Each tie zone 51 is shaped like a regular pyramid, with its apexes fixed opposite each other and arranged symmetrically. The axis of the space truss tie member 5 is perpendicular to the body of the insulation layer 2, and its frame has a hollow structure. A portion of each tie zone 51 is located within the outer concrete leaf slab 1 and the inner concrete leaf slab 3, respectively.
[0027] Each tie section 51 of the space truss tie member 5 consists of four sets of horizontal chords 511 and four sets of inclined chords 512. The four sets of horizontal chords 511 form a regular quadrilateral frame platform. Each corner of the frame platform is fixed with a set of inclined chords 512. The other ends of all inclined chords 512 converge at a point and are then fixed, thus forming an overall regular square pyramid structure. Each chord is a cylindrical member with an equal diameter of 6mm to 10mm. The angle between the inclined chords 512 and the axis of the space truss tie member 5 is 30° to 60°.
[0028] Along the direction perpendicular to the wall panel surface, the total height of the spatial truss tie members 5 is 80mm to 160mm. The spatial truss tie members 5 are arranged in a rectangular array within the wall panel, with a spacing of 300mm to 600mm between adjacent spatial truss tie members 5. The thickness of the outer concrete leaf plate 1 and the inner concrete leaf plate 3 is 50mm to 100mm, and the thickness of the insulation layer is 30mm to 100mm.
[0029] In this embodiment, when the wall panel is used as a building curtain wall, the thickness of the outer concrete leaf 1 is set to 60mm, the thickness of the insulation layer 2 is set to 30mm, and the thickness of the inner concrete leaf 3 is set to 200mm.
[0030] The manufacturing process of sandwich wall panels includes the following steps:
[0031] S1. EPS particles are heated by steam in a pre-foaming machine to form pre-foamed particles. The steam heating temperature is set to 90℃~110℃. After the pre-foamed particles are left to stand and mature, they are filled into the insulation layer mold. The maturation operation is carried out in a ventilated environment for 12~24 hours.
[0032] S2. Design and fabricate space truss tie member 5, and calculate whether the ultimate shear bearing capacity of space truss tie member 5 after being added to the rear wall panel meets the design requirements.
[0033]
[0034] Where V is the ultimate shear bearing capacity of the wall panel;
[0035] k1 is the fitting coefficient;
[0036] D is the diameter of the chord of the space truss tie member 5;
[0037] H is the height of the space truss tie member 5;
[0038] L represents the depth at which the tie zone 51 is anchored in the concrete blade.
[0039] θ is the angle between the inclined chord 512 and the axis of the space truss tie member 5.
[0040] Once the design requirements are met, each space truss tie member 5 is fixed in the insulation layer mold in an array, so that the center of symmetry of the space truss tie member 5 is at the same height as the center of the insulation layer mold; if the requirements are not met, its dimensions are redesigned.
[0041] S3. Steam is introduced into the insulation layer mold, causing the pre-foamed particles to soften upon heating and fuse with each space truss tie member 5 to form the insulation layer 2. At this point, the space truss tie members 5 and the insulation layer 2 form an integrated structure. In this step, grooves need to be cut into the insulation layer mold to make the insulation layer mold a multi-segment structure, and the space truss tie members 5 are clamped and fixed through the insulation layer mold.
[0042] In addition to this fixing method, the insulation layer 2 can be formed in the mold first, and then grooves can be made on the insulation layer 2. The space truss tie member 5 is designed as a split structure, inserted into the corresponding groove in the insulation layer 2, and then bonded and fixed.
[0043] S4. After cutting and drying the insulation layer 2, place it in the concrete casting mold, install the steel mesh in the concrete casting mold, pour concrete in the concrete casting mold, and form the outer concrete leaf plate 1 and the inner concrete leaf plate 3 on both sides of the insulation layer 2. After curing and demolding, the wall panel manufacturing is completed.
[0044] During the actual pouring process, the lower layer of steel mesh is tied together with the spacer blocks and placed into the concrete pouring mold. The inner leaf plate 3 of the concrete is poured. Before it solidifies, the insulation layer 2 and the space truss tie rod 5 are placed in. Then, the upper layer of steel mesh is tied together with the spacer blocks and placed in the insulation layer 2. The outer leaf plate 1 of the concrete is poured. After the concrete has cured, it can be used in actual projects.
[0045] To verify the calculation of the ultimate flexural bearing capacity of the sandwich wall panel in this embodiment, a three-dimensional model of the sandwich wall panel was established using ABAQUS software. The concrete was modeled using a three-dimensional solid model, and the space truss tie member 5 was modeled using beam elements. The concrete strength was 40 MPa, the elastic modulus was 26 GPa, the elastic modulus of the space truss tie member 5 was 35 GPa, and the concrete leaf plate had a cross-sectional width of 300 mm, a height of 300 mm, and a thickness of 70 mm.
[0046] The parameters considered mainly include the diameter of a single chord of the space truss tie member 5 (6mm, 8mm, 10mm), the height of the space truss tie member 5 (80mm, 100mm, 120mm, 140mm), the depth of the tie zone 51 anchored in the concrete blade (20mm, 30mm, 40mm, 50mm), and the angle between the inclined chord member 512 and the axis of the space truss tie member 5 (30°, 45°, 60°).
[0047] The numerical model of the ultimate flexural bearing capacity obtained from the analysis is shown in Table 1 below.
[0048] Table 1
[0049]
[0050]
[0051] Among them, V m V represents the ultimate shear capacity calculated by finite element software (unit: kN); V is the ultimate shear capacity calculated in this embodiment. m Comparison with the value of V, for example Figure 3 As shown, the calculation in this embodiment has high accuracy and can predict the ultimate shear bearing capacity of the sandwich wall panel well.
[0052] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.
[0053] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.
Claims
1. A space truss tie, characterized by, The space truss tie member (5) includes two sets of tie zones (51) with a regular square pyramidal structure. The two tie zones (51) are arranged symmetrically with their apexes facing each other. The axis of the space truss tie member (5) is arranged along the direction perpendicular to the wall panel.
2. A space truss tie according to claim 1, wherein, The tie section (51) consists of four sets of horizontal chords (511) and four sets of inclined chords (512) to form a regular square pyramidal frame structure. The horizontal chords (511) and the inclined chords (512) are all cylindrical rods with the same diameter.
3. A space truss tie according to claim 2, wherein, The diameters of the horizontal chord (511) and the inclined chord (512) are 6mm to 10mm.
4. A space truss tie rod according to claim 2, characterized in that, The angle between the inclined chord (512) and the axis of the space truss tie member (5) is 30° to 60°.
5. A concrete sandwich wall panel characterised in that, The space truss tie member (5) as described in any one of claims 1 to 4 penetrates the insulation layer (2) and then ties and positions the concrete outer leaf plate (1) and the concrete inner leaf plate (3).
6. A concrete sandwich wall panel according to claim 5, characterised in that Along the direction perpendicular to the wall panel, the total height of the space truss tie member (5) is 80mm to 160mm.
7. A concrete sandwich wall panel according to claim 5, wherein The space truss tie members (5) are arranged in a rectangular array within the wall panel, with a spacing of 300mm to 600mm between adjacent space truss tie members (5).
8. A concrete sandwich wall panel according to claim 5, wherein The thickness of the outer concrete leaf plate (1) and the inner concrete leaf plate (3) is 50mm to 100mm, and the thickness of the insulation layer (2) is 30mm to 100mm.
9. A concrete sandwich wall panel according to claim 5, characterized in that, Both the outer concrete leaf plate (1) and the inner concrete leaf plate (3) are equipped with steel mesh (4), and the insulation layer (2) is EPS foam insulation board.