CN112982816A - Shear connector distribution method in sandwich structure, connector device and application - Google Patents
Shear connector distribution method in sandwich structure, connector device and application Download PDFInfo
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- CN112982816A CN112982816A CN202110201917.8A CN202110201917A CN112982816A CN 112982816 A CN112982816 A CN 112982816A CN 202110201917 A CN202110201917 A CN 202110201917A CN 112982816 A CN112982816 A CN 112982816A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000009826 distribution Methods 0.000 title claims abstract description 22
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000010008 shearing Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 30
- 239000002131 composite material Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 25
- 230000004044 response Effects 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 4
- 239000011229 interlayer Substances 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000001976 improved effect Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000013524 data verification Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
-
- 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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
Abstract
The invention belongs to the technical field of distribution of interlayer shear connectors, and discloses a distribution method of shear connectors in a sandwich structure, a connector device and application thereof, wherein longitudinal steel bars and transverse steel bars are bound, and shear connectors are fixed at two positions which are one quarter of the length of a structure away from the end part; after binding is finished, installing a template, pouring concrete, and curing the concrete under the conditions of certain temperature and humidity; after the concrete reaches a certain strength, the two concrete layers are connected at the end part of the structure through a rigid shearing connector, and a heat insulation layer is added between the concrete layers. The invention can better control the slippage and optimize the connector according to the characteristics of slippage distribution; the optimized design improves the structural response by reducing the thermal bridge and obtains better heat insulation performance; the distribution of the shear connectors in the sandwich structure may improve the deformation and stress conditions of the sandwich structure under service loads, i.e. reduce the maximum deflection and stress at mid-span locations.
Description
Technical Field
The invention belongs to the technical field of distribution of interlayer shear connectors, and particularly relates to a distribution method and application of a shear connector in a sandwich structure.
Background
Sandwich structures are usually composed of two concrete layers and one insulating layer. The insulation layer is sandwiched between two concrete layers interconnected by a shear connector. The sandwich structure is widely used mainly because of its insulating properties. Their structural properties may vary greatly in different arrangements, for example, the size of the sandwich structure, the thickness of the insulating layer and the stiffness of the connector. This requires analysis and optimization of the sandwich structure. To meet this requirement, the present invention makes the optimal configuration of the shear connector from a slip perspective.
In the building industry of sandwich structures, the sandwich structure is generally divided into, according to the level of structural recombination: non-composite, partially composite and fully composite. Among other things, connectors are the key to providing composite behavior. For sandwich structures, the interaction between the connectors and the concrete layer can result in slippage, which in turn reduces its composite action and stiffness. The slip can also be expressed as a strain incompatibility between the bottom of the top concrete layer and the top of the bottom concrete layer. In other words, the partial composite sandwich structure has greater deflection and greater stress than the full composite sandwich structure due to the presence of slippage. Although slippage is not evenly distributed along the span of the sandwich structure, in current engineering, shear connectors are typically evenly arranged along the length of the structure to provide shear resistance and limit slippage. Connectors are specially manufactured in most projects, depending on the structural features and design requirements.
Some documents may provide references in adjusting the layout of the connector. Lameiras et al studied the layout of the connectors by changing the pitch of the uniform connectors and concluded that: discrete connector layouts have advantages over continuous connector layouts. In addition, according to the mechanism of the composite structure, it is more effective to place the connectors at the ends of the structure than to place the connectors evenly. Similarly, connector arrangements for steel-concrete composite beams have been investigated. Another important aspect of the sandwich design is the control of the deflection under conditions of use, e.g. under lateral loads, large lateral deformations and avoidance of thermal bending effects. However, there is relatively little literature on the arrangement of connectors. Since the sandwich structure is normally subjected to longitudinal loads, by using the connector layout of the invention, the lateral deflection of the sandwich structure is reduced, thereby reducing the influence of the second order P- δ effect (see fig. 2), and the thermal bowing phenomenon.
Through the above analysis, the problems and defects of the prior art are as follows: this results in lateral deformation of the structure due to the sandwich structure often being subjected to lateral loads, such as wind loads and the like. In addition, the sandwich structure is used as a heat-insulating wall and bears different temperature differences and longitudinal load effects, so that the sandwich structure is subjected to thermal bending and further subjected to transverse deformation due to a P-delta second-order effect.
The difficulty in solving the above problems and defects is: compared with the prior sandwich structure construction process, the construction process of the invention is more complex. At present, for the problem, no theoretical and experimental research on the layout of the connector exists, and the experimental data verification effect is lacked.
The significance of solving the problems and the defects is as follows: by changing the layout of the connector, the function of the connector is exerted with higher efficiency, the transverse deformation of the sandwich structure is reduced, and the use requirement is further met.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for distributing shear connectors in a sandwich structure and application thereof.
The invention is realized in such a way that the shear connector device in the sandwich structure is characterized in that a rigid connector is arranged at the end part of the sandwich structure, and the shear connectors are added near two positions which are one quarter of the length of the structure away from the end part.
It is another object of the present invention to provide a method of distributing shear connectors in a sandwich structure that improves the deformation and stress conditions under service loads by adjusting the distribution of the shear connectors in the sandwich structure.
Further, the allocation method comprises:
binding longitudinal steel bars and transverse steel bars, and adding shearing connectors near two positions which are one quarter of the length of the structure at the end part.
After binding is finished, installing a template, pouring concrete, and curing the concrete under the conditions of certain temperature and humidity;
after the concrete reaches a certain strength, the two concrete layers are connected at the tail end of the structure through a shearing connector, and a heat insulation layer is added between the concrete layers.
Further, the selection of style and material of the shear connector is not limited. Several common shear connector styles are shown in figure 2.
Further, the distribution method of the shear connectors in the sandwich structure analyzes the layout effects of different connectors through a numerical method. The improved effect of placing a shear connector at the end is analyzed in figure 6; the improved effect of adding additional connectors was analyzed on the basis of the end-mounted rigid shear connector, see fig. 11. The invention also provides a sandwich-type prefabricated heat-insulation outer wall structure, which uses the shear connector distribution method in the sandwich structure.
Another object of the present invention is to provide a steel-concrete sandwich immersed tube structure using the shear connector distribution method in the sandwich structure.
The invention also aims to provide a sandwich thermal insulation wallboard, which uses the shear connector distribution method in the sandwich structure.
Another object of the present invention is to provide a sandwich rock wool sandwich panel using the method for distributing shear connectors in a sandwich structure.
The invention also provides a sandwich thermal-insulation external wall panel, which uses the shear connector distribution method in the sandwich structure.
Another object of the present invention is to provide a steel-concrete composite beam using the method for distributing shear connectors in a sandwich structure.
By combining all the technical schemes, the invention has the advantages and positive effects that: the present invention provides a new perspective to better control slippage and to set the connector layout according to the characteristics of the slippage profile. The distribution of the shear connector of the present invention in a sandwich configuration can improve the deformation and stress conditions under service loads (see fig. 11), i.e., reduce the maximum deflection and floor stress at mid-span locations. The invention can be used as a heat insulation structure, reduces heat bridges to improve the structural response and simultaneously obtains better heat insulation performance. In addition, sandwich structures are often used as load-bearing walls, bearing longitudinal loads, which reduce the effect of the P- δ second order effect due to the reduced deflection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a flow chart of a method for distributing shear connectors in a sandwich structure according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a second order P- δ effect according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of several shear connectors provided by embodiments of the present invention.
FIG. 4 is a layout of a sandwich structure according to an embodiment of the present invention; in fig. 4: (a) layout A (B + C); (b) b layout (both ends are rigid); (c) c layout (uniform distribution).
Fig. 5 is a B layout and a cross-sectional view provided by an embodiment of the present invention.
FIG. 6 is a first schematic diagram illustrating the structural response of a sandwich structure according to an embodiment of the present invention; in fig. 6: (a) slipping; (b) stress at the bottom of the bottom concrete; (c) deflection.
FIG. 7 is a second schematic diagram illustrating a structural response provided by an embodiment of the present invention; in fig. 7: (a) slipping; (b) stress at the bottom of the bottom concrete; (c) deflection.
FIG. 8 is a third schematic diagram of a structural response provided by an embodiment of the present invention; in fig. 8: (a) slipping; (b) stress of the bottom concrete; (c) deflection.
Fig. 9 is a layout and cross-sectional view provided by an embodiment of the present invention.
FIG. 10 is a block diagram of an embodiment of the present invention that provides for the use of three different levels of KmaxAddition to the. + -. l/4 position, KmaxA value analysis chart; in fig. 9: (a) slipping; (b) concrete stress at the bottom; (c) deflection.
FIG. 11 is a graph of the effect of contrast in structural response of an embodiment of the present invention providing that the shear stiffness of the add-on connector is the same as the total stiffness of the connectors uniformly arranged along the length of the A layout; in fig. 10: (a) slipping; (b) concrete stress at the bottom; (c) deflection.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the present invention provides a method for distributing shear connectors in a sandwich structure and the application thereof, and the following describes the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1, the method for distributing shear connectors in a sandwich structure provided by the present invention comprises the following steps:
s101: binding longitudinal steel bars and transverse steel bars, and adding shearing connectors near two positions which are one quarter of the length of the end part;
s102: after binding is finished, installing a template, pouring concrete, and curing the concrete under the conditions of certain temperature and humidity;
s103: after the concrete reaches a certain strength, the two concrete layers are connected at the end part of the structure through a rigid connector, and a heat insulation layer is added between the concrete layers.
One skilled in the art can also use other steps to implement the method for distributing shear connectors in a sandwich structure provided by the present invention, and the method for distributing shear connectors in a sandwich structure provided by the present invention in fig. 1 is only one specific example. Fig. 2 is a few specific connector styles, and the actual choice is not limited thereto.
The technical solution of the present invention is further described below with reference to the accompanying drawings.
In the invention, the input basic parameters analyze the layout effect of different connectors by a numerical method, and the meaning of the input parameters is as follows: a. the1Representing the cross-sectional area of the top concrete; a. the2Representing the cross-sectional area of the underlying concrete; b represents a cross-sectional width; c represents the linear expansion coefficient of the structure; d1Representing the distance of the center of mass of the top concrete to the upper edge of the sandwich structure; d2Representing the distance of the center of mass of the underlying concrete to the lower edge of the sandwich structure; e represents the distance of the centroid of the top concrete to the centroid of the bottom concrete; e1Representing the modulus of elasticity of the top concrete; e2The modulus of elasticity of the underlying concrete is expressed; f. ofc ’Represents the tensile strength of the concrete; h represents a cross-sectional height; i is1Representing the moment of inertia of the top concrete layer; i is2Representing the moment of inertia of the underlying concrete layer; k is a radical offRepresenting the shear stiffness of the connector; k represents the overall shear stiffness of the connector; kmaxRepresents the maximum shear stiffness of the connector; ku＝Kmax/nl represents the span length of the structure; n represents the number of connectors; q represents the external uniform load of unit length; t is1Representing the temperature of the top concrete layer; t is2The temperature of the underlying concrete layer is indicated.
The invention provides a shear connector distribution method in a sandwich structure, which comprises the following steps:
the first step, the construction process. Binding longitudinal steel bars and transverse steel bars, and fixing a shearing connector at the +/-l/4 position (length is l) of the structure. And after the binding is finished, installing a template and pouring concrete. And curing the concrete under the conditions of certain temperature and humidity. After the concrete reaches a certain strength, the two concrete layers are connected at the structure end through the rigid shearing connector, and a heat insulation layer is added between the concrete layers.
And the second step, action and significance. The present invention is directed to optimizing the distribution of shear connectors in a sandwich structure to improve deformation and stress conditions under service loads. Unlike the conventional uniform shear connector configurations, the present invention proposes and analyzes two shear connector configurations, and through further analysis of the slip profile, designs a novel control device, and adds an additional shear connector at the ± l/4 position, which can significantly reduce stress and deflection. The conclusion is that optimizing the shear connector will reduce stress and deflection.
And thirdly, acting and effect. According to the invention, the influence of different connector layouts on the sandwich structure is considered through a numerical analysis method, the uniformly distributed load ql borne by the sandwich structure is designed, and the midspan position is set as the original point of structural analysis. Since both the structure and the load are symmetrical, half span of the structure was taken for analysis.
Optimizing the layout of the connector: under the action of service load, setting basic parameters: e1＝36.61GPa,E2＝36.61GPa,I1＝3.9134×10-4m4,I2＝3.9134×10-4m4,d1＝38mm,d2＝38mm,A1＝6.1788×10- 2m2,A2＝6.1788×10-2m2,b＝813mm,h＝229mm,e＝153mm,l＝3.048m,q＝4.2032kN/m,KC＝114276790N/m2,KB＝571383950N/m2.
Considering the effect of temperature, the applied load q is equal to zero and the temperature difference is equal to 46.5 ℃. Further, the concrete had an expansion coefficient of 6.45X 10-6/℃。KCEqual to 114276790N/m2，KBEqual to 571383950N/m2. The corresponding structural response and corresponding effect is shown in fig. 8.
The layout of the connector is further optimized: the connector is arranged at the support position, the improvement effect on the structural response is better, and the support position slippage is not further limited to zero through a special construction process. The basic parameters are similar to those described above, except for the external load and the connector stiffness. The external load q was 8.4064 kN/m. The sandwich structure is shown in its layout and cross-section in figure 9.
In order to observe the influence of different shear rigidity Ks on a sandwich structure, the invention uses three Ks with different levelsmaxAddition to the. + -. l/4 position, different KmaxThe value correspondence effect is shown in fig. 10.
The response of the sandwich structure with the B layout is obtained through theoretical analysis, and the rest data are obtained through a shooting numerical method. The three layouts of the connector have different effects on the structure. "l/8", "l/4", "initial maximum slip position" and "3 l/8" in FIG. 10 respectively refer to positions where additional connectors are added on the basis of the B layout. Wherein the shear stiffness of the additional connector is the same as the total stiffness of the connectors arranged uniformly along the length along the a layout. The corresponding effect is shown in fig. 11.
And fourthly, innovation points. In engineering practice, the connectors of the sandwich structure are mostly uniformly distributed, but do not play the most role of the connector. In the invention, the end part of the structure is provided with rigid constraint, and an additional shear connector is added at the +/-l/4 position, so that the function of the connector is exerted to the maximum efficiency on the basis of meeting the engineering application, and the feasibility of the invention is verified on the basis of theory.
According to the invention, a structural response comparison effect graph of different sandwich structures under uniformly distributed loads is obtained through a numerical analysis method. FIG. 4 is a sandwich structure diagram of three connector layouts. FIG. 5 is a sandwich structure and cross-sectional view of the B layout. In fig. 6 to 8, comparing the structural response effect of the B layout and the C layout under the connector with the same total shear rigidity, it is found that the higher the shear rigidity of the connector is under the external load, the better the improvement effect of the B layout relative to the C layout is, but the improvement effect is not very obvious in terms of temperature. FIG. 9 is a sandwich structure and cross-sectional view of the present invention. In fig. 10, it is found that the influence of different magnitudes of the shear stiffness of the extra connector on the structure is not linear, and therefore, selecting a more appropriate extra connector has an important influence on the improvement effect and the economy of the structure. In fig. 11, comparing the sandwich structures of different connector layouts, it is found that the a layout has the best optimization effect compared with the B, C layout, but the construction is also the most troublesome. The improvement effect of adding the extra connector at the initial maximum sliding position on the basis of the layout B is the best and even better than that of the layout A. Because the effect of adding the extra connector at the +/-l/4 position and the effect of adding the extra connector at the initial maximum sliding position on the basis of the B layout are not very different, the +/-l/4 position is a good choice for facilitating construction.
As for the above effect, it can be seen from fig. 4 to 11 that the sandwich structure of the present invention has a significantly improved structural response under the action of external load and is more economical due to the smaller number of connectors, compared to the conventional sandwich structure.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A shear connector device in a sandwich structure is characterized in that a rigid shear connector is arranged near the end position of the structure in the sandwich structure, and shear connectors are added near two positions which are one quarter of the length of the structure away from the end.
2. A distribution method of shear connectors in a sandwich structure is characterized in that the distribution method improves deformation and stress states under use load by adjusting distribution of the shear connectors in the sandwich structure.
3. The method of dispensing a shear connector in a sandwich structure of claim 2, wherein the method of dispensing comprises:
binding longitudinal steel bars and transverse steel bars, and fixing a shearing connector at the +/-l/4 position of the structure;
after binding is finished, installing a template, pouring concrete, and curing the concrete under the conditions of certain temperature and humidity;
after the concrete reaches a certain strength, the two concrete layers are connected at the tail end of the structure through a shearing connector, and a heat insulation layer is added between the concrete layers.
4. The method of dispensing shear connectors in a sandwich construction of claim 1, wherein the selection of the style and material of the shear connectors is not limited.
5. The method of dispensing shear connectors in a sandwich construction of claim 2, wherein the selection of the style and material of the shear connectors is not limited.
6. The method of claim 1, wherein the method analyzes the layout effects of the different connectors by a numerical method.
7. A sandwich thermal insulation wallboard, characterized in that the sandwich thermal insulation wallboard uses the shear connector distribution method in the sandwich structure of any one of claims 1-4.
8. A sandwich rock wool sandwich panel, characterized in that the sandwich rock wool sandwich panel uses the method for distributing shear connectors in a sandwich structure according to any one of claims 1 to 4.
9. The sandwich thermal insulation external wall panel is characterized in that the sandwich thermal insulation external wall panel structure uses the distribution method of the shear connectors in the sandwich structure according to any one of claims 1 to 4.
10. A steel-concrete composite beam, characterized in that the steel-concrete composite beam uses the method for distributing shear connectors in a sandwich structure according to any one of claims 1 to 4.
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| CN202110201917.8A CN112982816A (en) | 2021-02-23 | 2021-02-23 | Shear connector distribution method in sandwich structure, connector device and application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110201917.8A CN112982816A (en) | 2021-02-23 | 2021-02-23 | Shear connector distribution method in sandwich structure, connector device and application |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH607710A5 (en) * | 1975-05-14 | 1978-10-13 | Ind Profilati Somaglia Spa S I | |
| CN101230602A (en) * | 2007-09-06 | 2008-07-30 | 同济大学 | Profiled bar concrete combination shearing wall and construction method thereof |
| CN106168058A (en) * | 2016-08-01 | 2016-11-30 | 中国十七冶集团有限公司 | A kind of prefabricated sandwich style Sandwich insulation wallboard and manufacture method |
| CN108301553A (en) * | 2017-12-11 | 2018-07-20 | 新疆苏中建设工程有限公司 | A kind of precast concrete board wall and preparation method thereof |
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2021
- 2021-02-23 CN CN202110201917.8A patent/CN112982816A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH607710A5 (en) * | 1975-05-14 | 1978-10-13 | Ind Profilati Somaglia Spa S I | |
| CN101230602A (en) * | 2007-09-06 | 2008-07-30 | 同济大学 | Profiled bar concrete combination shearing wall and construction method thereof |
| CN106168058A (en) * | 2016-08-01 | 2016-11-30 | 中国十七冶集团有限公司 | A kind of prefabricated sandwich style Sandwich insulation wallboard and manufacture method |
| CN108301553A (en) * | 2017-12-11 | 2018-07-20 | 新疆苏中建设工程有限公司 | A kind of precast concrete board wall and preparation method thereof |
| CN110241945A (en) * | 2019-06-18 | 2019-09-17 | 清华大学 | Novel precast concrete sandwich heat preserving wall body connector system and its design method |
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| Title |
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| 蒋丽忠等: "均布荷载作用下钢-混凝土组合梁滑移及变形的理论计算", 《工程力学》 * |
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