Curtain wall combined stand column node system with external decoration strip and internal stand column jointly stressed and comprehensive utilization rate calculation method

Abstract

The invention discloses a curtain wall combined stand column node system with an external decoration strip and an internal stand column jointly stressed and a comprehensive utilization rate calculation method.The node system comprises the internal stand column, a connecting piece, an exposed frame base, a pressing plate and the external decoration strip, and the internal stand column is a rectangular hollow column; a concave sliding clamping groove is formed between the side wing strip and the surface of the inner stand column, the connecting piece and the exposed frame base slide into the sliding clamping groove of the inner stand column in a spaced mode, the other end of the connecting piece is inserted into the external decoration strip, and the pressing plate is as long as the exposed frame base and abuts against the exposed frame base. The internal stand column is effectively connected with the external decoration strip through the connecting piece, field milling operation is reduced, the problem that the lateral mechanical property of a conventional stand column with the decoration strip cannot meet the standard requirement is particularly solved, cooperative stress of the external decoration strip and the internal stand column is effectively utilized, the stress performance of the combined stand column is enhanced, the material utilization rate is increased, and the service life of the combined stand column is prolonged. The construction material cost is saved, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of building curtain walls, and in particular to a curtain wall combined column node system under common stress of an external decorative strip and an internal column and a comprehensive utilization rate calculation method. Background Art

[0002] With the rapid development of my country's construction industry, the shapes of main buildings are changing with each passing day, and the design of building exterior curtain walls is becoming more and more diverse. Although the component-type curtain wall system is a common form of exterior protection structure, its design and construction method is relatively simple, but due to the current diversified curtain wall shapes, traditional design technology is difficult to meet actual needs, especially in the connection structure between decorative strips and columns.

[0003] In conventional component-type curtain walls, external decorative strips are usually connected to the top and bottom bolts of internal columns. This method requires increasing the mechanical performance index of the column in the weak axis direction, which is difficult to meet the on-site construction cost requirements and standard force requirements, and the bearing capacity and stability of the connection are poor. Before the formal wall construction, the front end of the column needs to be milled to facilitate the placement of the external decorative strip connector.

[0004] In the existing structural curtain wall with decorative strips, the external decorative strips are usually bolted to the top and bottom bolts of the internal columns. Because the decorative strips are subject to lateral wind loads, it is necessary to increase the mechanical performance index of the internal columns in the weak axis direction, that is, to use columns with larger cross-sections to resist the external lateral wind loads to meet the force requirements, resulting in low material utilization and poor economic effects; and the front end of the column exposed frame base needs to be milled on site, the construction process is complicated, and the construction accuracy is difficult to meet the node bearing capacity and stability requirements. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a curtain wall combined column node system under common stress of external decorative strips and internal columns and a comprehensive utilization rate calculation method.

[0006] In order to solve the above technical problems, the present invention provides the following first technical solution:

[0007] The present invention relates to a curtain wall composite column node system in which an external decorative strip and an internal column are subjected to force together, comprising an internal column, a connecting piece, an exposed frame base, a pressing plate and an external decorative strip, wherein the internal column is a rectangular hollow column, and both sides of one end surface are provided with side wing strips arranged in mirror image opposite to each other, a concave sliding groove is formed between the side wing strip and the surface of the internal column, the connecting piece and the exposed frame base are spaced and slide into the sliding groove of the internal column, the other end of the connecting piece is inserted into the external decorative strip, and the pressing plate has the same length as the exposed frame base and abuts against it;

[0008] A No. 1 bolt group is fixedly connected between the internal column and the connecting piece, a No. 2 bolt group is fixedly connected between the internal column and the exposed frame base, a No. 3 bolt group is fixedly connected between the exposed frame base and the pressure plate, and a No. 4 bolt group is fixedly connected between the connecting piece and the external decorative strip.

[0009] As a preferred technical solution of the present invention, the connecting part includes a first back panel and a first vertical panel, the first back panel and the first vertical panel are connected as a whole in a T-shaped structure, both ends of the first back panel are folded inward, the interior of the first vertical panel is a hollow structure, and a screw limiting groove is provided at the outer end of the first vertical panel, and the first back panel is slidably embedded in the sliding groove.

[0010] As a preferred technical solution of the present invention, the arrangement spacing of the connecting parts is 500mm-600mm.

[0011] As a preferred technical solution of the present invention, the exposed frame base includes a second backboard and a second vertical board, the second backboard and the second vertical board are connected as a whole in a T-shaped structure, the interior of the second vertical board is a hollow structure, and the length of the second vertical board is greater than that of the first vertical board.

[0012] The present invention provides the following second technical solution:

[0013] A method for calculating the comprehensive utilization rate of a curtain wall composite column that is jointly stressed by an external decorative strip and an internal column, the specific steps are as follows:

[0014] Calculate the stiffness of the internal column and the external decorative strip, and then calculate the overall stiffness of the column after combining them;

[0015] The stress verification strength of the internal column, the stress verification strength of the external decorative strip column and the deformation verification deflection of the combined column are calculated respectively through the overall stiffness of the combined column. Among them, the stress verification strength of the internal column and the external decorative strip are calculated through the distribution coefficient, and finally the comprehensive utilization rate of the combined column is obtained;

[0016] In this process, the relevant calculation formula is:

[0017] Positive bending moment of column:

[0018] Column lateral bending moment:

[0019] Column positive overall stiffness: D ct_x =EI ax +EI bx ,

[0020] Column lateral overall stiffness: D ct_y =EI ay +EI by ,

[0021] Column positive stiffness distribution coefficient: k 2 =1-k 1 ,

[0022] Column lateral stiffness distribution coefficient: k 4 =1-k 3 ,

[0023] Column normal stress:

[0024] Normal stress of decorative strips:

[0025] Positive deflection of combined column:

[0026] Lateral deflection of combined column:

[0027] In the above formula, M x is the positive bending moment of the column (N*mm), q z is the design value of the column positive linear load (N*mm -1 ), H is the calculated span of the column (mm), M y is the lateral bending moment of the column (N*mm), q c is the design value of the lateral linear load of the column (N*mm -1 ), σ is the column normal stress (MPa), γ is the cross-section plastic development coefficient, which can be taken as 1.05, W ax is the net section resistance moment of the column in the direction of positive bending moment (mm 3 ), W ay is the net section resistance moment of the column in the direction of lateral bending moment (mm 3 ), d zf is the positive deflection of the column (mm), q zd is the standard value of the positive linear load of the column (N*mm -1 ), E is the elastic modulus of the column profile (mm 4 ), I ax is the gross section moment of inertia of the column in the direction of positive bending moment (mm 3 ), d cf is the lateral positive deflection of the column (mm), q cd is the standard value of the lateral linear load of the column (N*mm -1 ), I ay is the gross section moment of inertia of the column in the direction of lateral bending moment (mm 3 ), D ct_x is the overall positive stiffness of the column (N*mm 2 ), Dct_y is the lateral overall stiffness of the column (N*mm 2 ).

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1: The external decorative strips of the present invention are connected to the columns through special connectors and are evenly arranged, so that the external decorative strips are transformed from purely decorative components with poor safety into load-bearing components that resist external loads together with the internal columns. This design significantly enhances the load-bearing performance of the combined columns and increases the overall stability of the connection between the columns and the decorative strips; it effectively reduces the cross-sectional size of the internal columns, improves material utilization, and reduces the material cost of the curtain wall project.

[0030] 2: The calculation method provided by the present invention reasonably distributes the external load borne by the curtain wall to the internal columns and the external decorative strip combined columns through the stiffness distribution principle, and performs actual force simulation through finite element simulation. The finite element simulation calculation results are consistent with the calculation results of the standard method, which further verifies the feasibility and practicality of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0032] In the drawings, the same reference numerals all refer to the same components.

[0033] In addition, if a detailed description of a known technology is not necessary for illustrating the features of the present invention, it will be omitted. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0034] In the attached picture:

[0035] Figure 1 It is a schematic diagram of the overall structure of the node system of the present invention;

[0036] Figure 2 It is an exploded diagram of the overall structure of the node system of the present invention;

[0037] Figure 3 It is a top view of the overall structure of the node system of the present invention;

[0038] Figure 4 It is a schematic diagram of the internal column structure of the present invention;

[0039] Figure 5 yes Figure 4A schematic diagram of the structure enlargement in the middle;

[0040] Figure 6 It is a schematic diagram of the structure of the connector of the present invention;

[0041] Figure 7 It is a schematic diagram of the exposed frame base structure of the present invention;

[0042] Figure 8 is a flow chart of the calculation method of the present invention;

[0043] Fig. 9 is the cross-sectional property diagram of the internal column in Example 2;

[0044] Fig.10 is a cross-sectional property diagram of the external decorative strip in Example 2;

[0045] Fig.11 This is the keel modeling diagram in Example 2;

[0046] Fig.12 is the maximum positive bending moment cloud diagram in Example 2;

[0047] Fig.13 is the maximum lateral bending moment cloud diagram in Example 2;

[0048] Fig.14 is the positive deflection cloud diagram in Example 2;

[0049] Fig.15 is the lateral deflection cloud diagram in Example 2;

[0050] In the figure: 1. internal column; 2. connecting piece; 3. exposed frame base; 4. pressure plate; 5. external decorative strip; 6. bolt group No. 1; 7. bolt group No. 4; 8. bolt group No. 3; 9. bolt group No. 2; 11. side wing strip; 12. sliding slot; 21. first back panel; 22. first vertical panel; 23. screw limit slot; 31. second back panel; 32. second vertical panel. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] Example 1

[0053] like Figure 1-7As shown, the present invention provides a curtain wall composite column node system in which an external decorative strip and an internal column are jointly stressed, comprising an internal column 1, a connector 2, an exposed frame base 3, a pressing plate 4 and an external decorative strip 5, wherein the internal column 1 is a rectangular hollow column, and both sides of the surface of one end are provided with side wing strips 11 arranged in mirror image, and a concave sliding groove 12 is formed between the side wing strip 11 and the surface of the internal column 1, the connector 2 and the exposed frame base 3 are spaced and slide into the sliding groove 12 of the internal column 1, and the other end of the connector 2 is inserted into the external decorative strip 5, and the pressing plate 4 has the same length as the exposed frame base 3 and abuts against it;

[0054] A No. 1 bolt group 6 is fixedly connected between the internal column 1 and the connecting piece 2, a No. 2 bolt group 9 is fixedly connected between the internal column 1 and the exposed frame base 3, a No. 3 bolt group 8 is fixedly connected between the exposed frame base 3 and the pressure plate 4, and a No. 4 bolt group 7 is fixedly connected between the connecting piece 2 and the external decorative strip 5.

[0055] Furthermore, the connecting member 2 includes a first back panel 21 and a first vertical panel 22. The first back panel 21 and the first vertical panel 22 are connected as a whole in a T-shaped structure. Both ends of the first back panel 21 are folded inward. The interior of the first vertical panel 22 is a hollow structure. A screw limiting groove 23 is provided at the outer end of the first vertical panel 22. The first back panel 21 is slidably embedded in the sliding groove 12.

[0056] Furthermore, the connection members 2 are arranged at intervals of 500 mm to 600 mm.

[0057] Furthermore, the exposed frame base 3 includes a second back plate 31 and a second vertical plate 32 . The second back plate 31 and the second vertical plate 32 are connected as a whole in a T-shaped structure. The interior of the second vertical plate 32 is a hollow structure. The length of the second vertical plate 32 is greater than that of the first vertical plate 22 .

[0058] Specifically, during construction, the second back plate 31 of the exposed frame base 3 is aligned with the sliding slot 12 and slid in. After the connection with the internal column 1 is achieved, the second bolt group 9 is driven in to lock it. Then, the first back plate 21 of the connector 2 is aligned with the sliding slot 12 and slid in. After the connection with the internal column 1 is achieved, the first bolt group 6 is driven in to lock it. This process can be repeated later. In this case, the arrangement spacing of the connector 2 is 500mm, that is, the length of the exposed frame base 3 is 500mm. Then, the pressing plate 4 is pressed against the outside of the exposed frame base 3 and fixed with the third bolt group 8. Finally, one end of the bolt of the fourth bolt group 7 is slid into the screw limit groove 23. The special connector inside the external decorative strip 5 for connecting with the internal column 1 is customized in the factory. During on-site construction, after orderly installation, it is docked with the connector 2 and the nut at the other end of the fourth bolt group 7 is locked, thereby greatly improving the construction efficiency. In addition, the edges of both sides of the opposite surfaces of the side wing strip 11 and the pressure plate 4 are provided with embedding grooves for inserting the exterior decoration plate.

[0059] It can be seen from this that the external decorative strips of the present invention are connected to the columns through special connecting parts and are evenly arranged, so that the external decorative strips are transformed from purely decorative components with poor safety into load-bearing components that resist external loads together with internal columns. This design significantly enhances the load-bearing performance of the combined columns, while increasing the overall stability of the connection between the columns and the decorative strips; it effectively reduces the cross-sectional dimensions of the internal columns, improves material utilization, and reduces the material cost of the curtain wall project.

[0060] Example 2

[0061] like Figure 8-15 As shown, the present invention provides a method for calculating the comprehensive utilization rate of a curtain wall composite column that is jointly stressed by an external decorative strip and an internal column, and the specific steps are as follows:

[0062] Calculate the stiffness of the internal column and the external decorative strip, and then calculate the overall stiffness of the column after combining them;

[0063] The stress verification strength of the internal column, the stress verification strength of the external decorative strip column and the deformation verification deflection of the combined column are calculated respectively through the overall stiffness of the combined column. Among them, the stress verification strength of the internal column and the external decorative strip are calculated through the distribution coefficient, and finally the comprehensive utilization rate of the combined column is obtained;

[0064] In this process, the relevant calculation formula is:

[0065] Positive bending moment of column:

[0066] Column lateral bending moment:

[0067] Column positive overall stiffness: D ct_x =EI ax +EI bx ,

[0068] Column lateral overall stiffness: D ct_y =EI ay +EI by ,

[0069] Column positive stiffness distribution coefficient: k 2 =1-k 1 ,

[0070] Column lateral stiffness distribution coefficient: k 4 =1-k 3 ,

[0071] Column positive stress (basis for strength verification):

[0072] Normal stress of decorative strips (basis for strength verification):

[0073] Positive deflection of combined column (basis for positive deflection verification):

[0074] Lateral deflection of combined columns (basis for lateral deflection verification):

[0075] In the above formula, M x is the positive bending moment of the column (N*mm), q z is the design value of the column positive linear load (N*mm -1 ), H is the calculated span of the column (mm), M y is the lateral bending moment of the column (N*mm), q c is the design value of the lateral linear load of the column (N*mm -1 ), σ is the column normal stress (MPa), γ is the cross-section plastic development coefficient, which can be taken as 1.05, W ax is the net section resistance moment of the column in the direction of positive bending moment (mm 3 ), W ay is the net section resistance moment of the column in the direction of lateral bending moment (mm 3 ), d zf is the positive deflection of the column (mm), q zd is the standard value of the positive linear load of the column (N*mm -1 ), E is the elastic modulus of the column profile (mm 4 ), I ax is the gross section moment of inertia of the column in the direction of positive bending moment (mm 3 ), d cf is the lateral positive deflection of the column (mm), q cd is the standard value of the lateral linear load of the column (N*mm -1 ), I ay is the gross section moment of inertia of the column in the direction of lateral bending moment (mm 3 ), D ct_x is the overall positive stiffness of the column (N*mm 2 ), D ct_y is the lateral overall stiffness of the column (N*mm 2 ).

[0076] Specifically, calculate the comprehensive utilization rate of the curtain wall composite columns that bear the force of the external decorative strips and the internal columns:

[0077] 1. Obtain basic information (calculation conditions)

[0078] Calculation elevation: Z: = 100m,

[0079] Calculate the partition width: B1: = 1800mm B2: = 1800mm,

[0080] B: = (B1 + B2) * 0.5 = 1.8m,

[0081] Calculated span of column: H: =4300mm,

[0082] Panel thickness: t_1: = 24mm,

[0083] Panel material: Mal_0 = "Glass",

[0084] Self-weight magnification: γ0: = 1 + 20%,

[0085] Decorative strip length: Bc: = 224mm,

[0086] Decorative strip cross-sectional area: Ac: = 1583mm 2，

[0087] Decorative strip material: Mal_1 = "aluminum alloy",

[0088] Decorative strip body coefficient: μ s2 :=-2.0,

[0089] 1) Internal column cross-section properties such as Fig. 9 As shown in:

[0090] Cross-sectional area: Aa: = 1332mm 2 ,

[0091] Sectional moment of inertia: Iax: = 2557706mm 4 Iay:=1118059mm 4 ,

[0092] Section bending moment: Wax: = 40231mm 3 Way:=31944mm 3 ,

[0093] 2) The cross-sectional properties of the external decorative strip are as follows: Fig.10 As shown in:

[0094] Cross-sectional area: Ab: = 1583 mm 2 ,

[0095] Sectional moment of inertia: Ibx: = 6765617mm 4 Iby:=1295447mm 4 ,

[0096] Section bending moment: Wbx: = 57510mm 3 Wby:=37012mm3 ,

[0097] 2. Load calculation

[0098] 1) Wind load calculation (ground roughness = "Class C")

[0099] Basic wind pressure: Wo = 0.35.kPa W = "GB 50009-2012 Table E.5",

[0100] Wind pressure height variation coefficient: μz = 1.5β = "GB50009-2012 Table 8.6.1",

[0101] Calculation location: R j = "Wall area" μ = "GB50009-2012 Table 8.2.1",

[0102] Body shape coefficient: μ out =1 μ in =-0.2,

[0103] μ s_25 :=0.8μ out =0.8,

[0104] Subordinate area: A: = BH: = 7.74m 2 ,

[0105] Body shape factor:

[0106]

[0107] μ s =1.07,

[0109] Gust coefficient: βgz=1.69,

[0110] Terrain correction factor: K1 = 1,

[0111] Wind direction influence coefficient: K2=1,

[0112] Standard value for standard calculation: W k1 :=β gz ·|μ s |·μ z ·K 1 ·K 2 ·w o =0.95·kPa,

[0113] Minimum wind pressure standard value: Wk2: = 1.0kPa,

[0114] Standard value of wind load: Wk: = max (Wk1, Wk2) Wk = 1.kPa,

[0115] Standard value of lateral wind load: W kc :=max(β gz ·|μ s2 |·μ z ·w o , W k2 )=1.776·kPa,

[0116] 2) Calculation of panel deadweight

[0117] Panel thickness: t_1 = 24 mm,

[0118] Panel material: Mal_0 = "Glass",

[0119] Panel gravity density: γ(Mal_0)=25.6﹒ kN﹒ m- 3 ,

[0120] Panel surface load:

[0121] 3) Calculation of horizontal earthquake load (KZ) = "6 degrees 0.05",

[0122] Maximum value of horizontal earthquake influence coefficient: αmax=0.04,

[0123] Power amplification factor: βE=5,

[0124] Standard value of horizontal earthquake action: qEk: = βE﹒ αmax﹒ Gcw qEk = 0.15kPa,

[0125] 4) Load combination calculation combination coefficient partial coefficient

[0126] Self-weight load: γG=1.3

[0127] Wind load: ψW=1.0 γG=1.5

[0128] Earthquake load: ψW=0.5 γG=1.4

[0129] Load combination: qcom:=ψW﹒ γW﹒ +Wk+ψE﹒ γE﹒ qEk=1.61KP

[0130] 3. Column load calculation

[0131] Internal column material: Mal_1 = "aluminum alloy",

[0132] Profile density: γde=γ(Mal_1)=28﹒ kN﹒ m -3 ,

[0133] Elastic model: Emo = (Mal_1) = 7 × 10 4 ﹒ MPa,

[0134] Poisson's ratio: νpo: = ν(Mal_1) = 0.33,

[0135] Profile type: Gra_1 = "6063-T6",

[0136] Profile shear strength: fs_mal(Gra_1)=85﹒MPa,

[0137] Profile tensile strength: ft_mal(Gra_1)=150﹒MPa,

[0138] Profile compressive strength: fbr_mal(Gra_1)=240﹒MPa,

[0139] External decorative strip material: Mal_2 = "aluminum alloy",

[0140] Profile density: γde_x=γ(Mal_2)=28﹒ kN﹒ m -3 ,

[0141] Elastic model: Emo_x = (Mal_2) = 7 × 10 4 ﹒ MPa,

[0142] Poisson's ratio: νpo_x: = ν(Mal_2) = 0.33,

[0143] Profile type: Gra_2 = "6063-T6",

[0144] Profile shear strength: fs_mal(Gra_2)=85﹒MPa,

[0145] Profile tensile strength: ft_mal(Gra_2)=150﹒MPa,

[0146] Profile compressive strength: fbr_mal(Gra_2)=240﹒MPa,

[0147] 1) Calculation of keel strength

[0148] Standard value of column line load: qzd: = B﹒ Wk qzd = 1.8﹒ kN﹒ m -1

[0149] qcd:=B﹒ Wkc qcd=0.4﹒ kN﹒ m -1 ,

[0150] Design value of column line load: qz: = B﹒ qcom qz = 2.89﹒ kN﹒ m -1

[0151] qc:=γW﹒ qcd qc=0.6﹒ kN﹒ m -1 ,

[0152] Overall stiffness of column: Dct_x: = Iax﹒ Emo+Ibx﹒ Emo_x Dct_x = 652.63﹒ kNm 2

[0153] Dct_y:=Iax﹒ Emo+Iby﹒ Emo_x Dct_y=168.95﹒ kNm 2 ,

[0154] Stiffness distribution coefficient: k2=1-k1=0.73

[0155] k4=1-k3=0.54,

[0156] Maximum bending moment of column: Mx=6.68﹒ kN﹒ m

[0157] My=1.38﹒ kN﹒ m,

[0158] Plastic development coefficient (aluminum keel): γ = 1.0,

[0159] Maximum stress of main frame:

[0160] ft_mal(Gra_1)=150﹒MPa, verification results (meeting the specification requirements),

[0161] Maximum stress of secondary frame:

[0162] ft_mal(Gra_2)=150﹒MPa, verification results (Meet the specification requirements).

[0163] 2) Calculation of keel deflection

[0164] Deformation coefficient: μbx1=180,

[0165] Allowable deflection:

[0166] Deflection calculation:

[0167] Deflection utilization: Verification results (≤1, meeting the specification requirements),

[0168] Deflection calculation:

[0169] Deflection utilization: Verification results (≤1, meeting specification requirements).

[0170] Afterwards, the finite element method was used to calculate the combined forces of the combined columns under the same conditions and parameters, and the results are as follows:

[0171] 1) Calculation of keel strength

[0172] Standard value of column line load: qzd: = B﹒ Wk qzd = 1.8﹒ kN﹒ m -1

[0173] qcd:=B﹒ Wkc qcd=0.4﹒ kN﹒ m -1 ,

[0174] Design value of column line load: qz: = B﹒ qcom qz = 2.89﹒ kN﹒ m -1

[0175] qc:=γW﹒ qcd qc=0.6﹒ kN﹒ m -1 ,

[0176] Use SAP2000 to model, such as Fig.11 As shown;

[0177] The connections between the internal columns and external decorative strips use WELD elements for node coupling plane degrees of freedom (@600mm).

[0178] The maximum positive bending moment, such as Fig.12 As shown, it can be concluded that:

[0179] Maximum positive bending moment of internal column: Mxn: =1.86kN﹒m,

[0180] Maximum positive bending moment of external decorative strip: Mxw: = 4.82kN﹒ m,

[0181] The maximum lateral bending moment, such as Fig.13 As shown, it can be concluded that:

[0182] Maximum lateral bending moment of internal column: Myn: = 0.65kN﹒ m,

[0183] Maximum lateral bending moment of external decorative strip: Myw: = 0.74 kN﹒ m,

[0184] Plastic development coefficient (aluminum keel): γ = 1.0,

[0185] Maximum stress of main frame:

[0186] ft_mal(Gra_1)=150﹒MPa, verification results (meeting the specification requirements),

[0187] Maximum stress of secondary frame:

[0188] ft_mal(Gra_2)=150﹒MPa, verification results (Meet the specification requirements).

[0189] 2) Calculation of keel deflection

[0190] Deformation coefficient: μbx1=180,

[0191] Allowable deflection:

[0192] Positive deflection, such as Fig.14 As shown, it can be concluded that:

[0193] Maximum positive deflection of internal column: dyn = 12.41 mm,

[0194] Maximum positive deflection of external decorative strip: dyw = 12.41 mm,

[0195] The calculation results show that the internal pillars and external decorative strips deform in a positive coordinated manner.

[0196] Positive deflection of combined column: dzf = 12.41mm,

[0197] Deflection utilization, verification results (≤1, meeting specification requirements).

[0198] Lateral deflection, such as Fig.15 As shown, it can be concluded that:

[0199] Maximum lateral deflection of internal columns: dyn = 10.61 mm,

[0200] Maximum lateral deflection of external decorative strip: dyw = 10.61 mm,

[0201] The calculation results show that the internal pillars and external decorative strips deform laterally in coordination.

[0202] Lateral deflection of combined column: dzf = 10.61 mm,

[0203] Deflection utilization, verification results (≤1, meeting specification requirements).

[0204] It can be seen that the calculation method provided by the present invention reasonably distributes the external load borne by the curtain wall to the internal columns and the external decorative strip combined columns through the stiffness distribution principle, and performs actual force simulation through finite element simulation. The finite element simulation calculation is consistent with the calculation results of the standard method, which further verifies the feasibility and practicality of the present invention.

[0205] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A curtain wall composite column node system in which an external decorative strip and an internal column bear force together, characterized in that: The invention comprises an internal column (1), a connecting piece (2), an exposed frame base (3), a pressing plate (4) and an external decorative strip (5); the internal column (1) is a rectangular hollow column, and the two sides of one end surface are provided with side wing strips (11) arranged in mirror image, and a concave sliding groove (12) is formed between the side wing strip (11) and the surface of the internal column (1); the connecting piece (2) and the exposed frame base (3) are spaced and slide into the sliding groove (12) of the internal column (1); the other end of the connecting piece (2) is inserted into the external decorative strip (5); the length of the pressing plate (4) is the same as that of the exposed frame base (3) and is against the exposed frame base (3); A No. 1 bolt group (6) is fixedly connected between the internal column (1) and the connecting member (2), a No. 2 bolt group (9) is fixedly connected between the internal column (1) and the exposed frame base (3), a No. 3 bolt group (8) is fixedly connected between the exposed frame base (3) and the pressure plate (4), and a No. 4 bolt group (7) is fixedly connected between the connecting member (2) and the external decorative strip (5).

2. A curtain wall composite column node system in which an external decorative strip and an internal column bear force together according to claim 1, characterized in that: The connecting member (2) comprises a first back plate (21) and a first vertical plate (22); the first back plate (21) and the first vertical plate (22) are connected as a whole in a T-shaped structure; both ends of the first back plate (21) are retracted and folded inward; the interior of the first vertical plate (22) is a hollow structure; a screw limiting groove (23) is provided at the outer end of the first vertical plate (22); and the first back plate (21) is slidably embedded in the sliding groove (12).

3. A curtain wall composite column node system in which an external decorative strip and an internal column are jointly stressed according to claim 2, characterized in that: The connection members (2) are arranged at a spacing of 500 mm to 600 mm.

4. A curtain wall composite column node system in which an external decorative strip and an internal column are jointly stressed according to claim 3, characterized in that: The exposed frame base (3) comprises a second back plate (31) and a second vertical plate (32); the second back plate (31) and the second vertical plate (32) are connected as a whole in a T-shaped structure; the interior of the second vertical plate (32) is a hollow structure; and the length of the second vertical plate (32) is greater than that of the first vertical plate (22).

5. A method for calculating the comprehensive utilization rate of a curtain wall composite column that is jointly stressed by an external decorative strip and an internal column, characterized in that: The specific steps are as follows: Calculate the stiffness of the internal column and the external decorative strip, and then calculate the overall stiffness of the column after combining them; The stress verification strength of the internal column, the stress verification strength of the external decorative strip column and the deformation verification deflection of the combined column are calculated respectively through the overall stiffness of the combined column. Among them, the stress verification strength of the internal column and the external decorative strip are calculated through the distribution coefficient, and finally the comprehensive utilization rate of the combined column is obtained; In this process, the relevant calculation formula is: Positive bending moment of column: Column lateral bending moment: Column positive overall stiffness: D ct_x =EI ax +EI bx , Column lateral overall stiffness: D ct_y =EI ay +EI by , Column positive stiffness distribution coefficient: k2=1-k1, Column lateral stiffness distribution coefficient: k4=1-k3, Column normal stress: Normal stress of decorative strips: Positive deflection of combined column: Lateral deflection of combined column: In the above formula, M x is the positive bending moment of the column (N*mm), q z is the design value of the column positive linear load (N*mm -1 ), H is the calculated span of the column (mm), M y is the lateral bending moment of the column (N*mm), q c is the design value of the lateral linear load of the column (N*mm -1 ), σ is the column normal stress (MPa), γ is the section plastic development coefficient, W ax is the net section resistance moment of the column in the direction of positive bending moment (mm 3 ), W ay is the net section resistance moment of the column in the direction of lateral bending moment (mm 3 ), d zf is the positive deflection of the column (mm), q zd is the standard value of the positive linear load of the column (N*mm -1 ), E is the elastic modulus of the column profile (mm 4 ), I ax is the gross section moment of inertia of the column in the direction of positive bending moment (mm 3 ), d cf is the lateral positive deflection of the column (mm), q cd is the standard value of the lateral linear load of the column (N*mm -1 ), I ay is the gross section moment of inertia of the column in the direction of lateral bending moment (mm 3 ), D ct_x is the overall positive stiffness of the column (N*mm 2 ), D ct_y is the overall lateral stiffness of the column (N*mm 2 ).

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