Supporting variable cross-section channel-shaped composite member

Abstract

The utility model relates to the technical field of building construction, concretely relates to a support variable cross section channel shape composite component, including panel and two strip shape, two the strip shape fixed in the position of the two sides bottom of the panel along the length direction, the strip shape includes side plate section and two eaves beam sections, two the eaves beam section is fixed in the both ends of side plate section, and the thickness of eaves beam section is greater than the thickness of side plate section. The utility model forms eaves beam section through thickening the vertical edge both ends position of panel, makes its eaves beam section have certain thickness, can bear enough pressure under the bending moment, to enhance the support carrying capacity, and the thickness of side plate section is less than the thickness of eaves beam section, reduces material cost and structure deadweight, and the hoisting operation is convenient, solves the technical problem that the edge structure of the existing channel shape component cannot satisfy the lightness of deadweight of eaves beam and the integrity structure requirement of beam simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a support variable cross-section groove-shaped composite component. Background Technology

[0002] If the vertical edges of existing channel-shaped members adopt edge beam structures, the edge beams need to meet the structural integrity requirements of beams, thus forming rigid edge constraints. This results in the edge beam section thickness being too large due to structural limitations, a significant increase in material costs, and a marked increase in the structural self-weight. If the vertical edges adopt side plates, the side plates can only be calculated as simply supported for strength, and cannot form effective fixed-end constraints. This may cause the deflection of the channel-shaped members to exceed the allowable limits in the code, and it cannot solve the problem of forming a continuous plate span when two channel-shaped members are spliced. This makes it difficult to achieve continuous stress at the splice, and there are misalignments at the joints between adjacent members. Differential deformation occurs under live loads, and the bending moment cannot be effectively transferred.

[0003] Therefore, there is an urgent need for a channel-shaped component that can meet the structural integrity requirements of beams while reducing the thickness and self-weight of side beams to solve the above-mentioned technical problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a support variable cross-section groove-shaped composite component, which aims to solve the technical problem that the edge structure of the existing groove-shaped component cannot simultaneously meet the structural requirements of being lighter than the side beam and having the integrity of a beam.

[0005] To achieve the above objectives, this utility model proposes a support variable cross-section groove-shaped composite component, including a panel and two strip members. The two strip members are fixed at the bottom positions of both sides of the panel along the length direction. Each strip member includes a side plate segment and two edge beam segments. The two edge beam segments are fixed at both ends of the side plate segment, and the thickness of the edge beam segment is greater than the thickness of the side plate segment.

[0006] The further improvement of the support variable cross-section groove-shaped composite component of this utility model is that an arc-shaped transition section is provided between the side plate section and the edge beam section.

[0007] The further improvement of the support variable cross-section groove-shaped composite component of this utility model is that a right-angle transition section is provided between the side plate section and the edge beam section.

[0008] The variable cross-section groove-shaped composite member of the present invention is further improved in that a sloping transition section is provided between the side plate section and the side beam section, and the included angle between the sloping side and the length side of the side beam is less than 90°.

[0009] The present invention further improves the support variable cross section groove composite member in that the panel is provided with a mid-span bottom reinforcement and a side-span bottom reinforcement, the mid-span bottom reinforcement corresponds to the position of the side plate segment, and the side-span bottom reinforcement corresponds to the position of the side beam segment.

[0010] The further improvement of the variable cross-section groove-shaped composite member of this utility model lies in the cross-sectional area of ​​the bottom reinforcement at mid-span. The expression is as follows: ; In the formula, The support bending moment; This is a coefficient representing the concrete strength grade. This is the design value for the axial compressive strength of concrete. Calculate the width of the compression zone flange at the vertical edge of the support; The height of the compression zone of the cross section when the lower part of the vertical edge is under compression; The effective height of the cross-section; This is the distance from the resultant point of the longitudinal reinforcement in the compression zone to the edge of the compression zone; This is the design value for the tensile strength of the reinforcing steel.

[0011] The variable cross-section groove-shaped composite member of the present invention is further improved in that the side beam segment is provided with bottom beam reinforcement, top beam reinforcement and side beam stirrups, and the side beam stirrups are fixed to the bottom beam reinforcement, top beam reinforcement and bottom reinforcement of the span.

[0012] The present invention further improves the support variable cross-section groove composite member in that the side plate segment includes a side plate bottom reinforcement, a side plate top reinforcement, a side plate middle reinforcement and a side plate stirrup, and the side plate stirrup is fixed to the side plate bottom reinforcement, the side plate top reinforcement, the side plate middle reinforcement and the mid-span bottom reinforcement.

[0013] The further improvement of the support variable cross-section groove composite member of this utility model is that the stirrups of the side plate are in the shape of a figure 9.

[0014] The further improvement of the variable cross-section groove-shaped composite member of this utility model lies in the short-term stiffness of the reinforced concrete flexural member of the variable cross-section groove-shaped composite member. The expression is as follows: ; In the formula, The elastic modulus of the steel reinforcement. This represents the cross-sectional area of ​​the longitudinal ordinary reinforcing bars in the tension zone. The effective height of the cross section, This is the coefficient of variation of strain in longitudinal tensile ordinary steel reinforcement between cracks. This is the lever arm coefficient. The influence coefficient of strain in longitudinally tensioned ordinary steel-reinforced channel members. This is the ratio of the elastic modulus of the steel reinforcement to the elastic modulus of the concrete. This refers to the longitudinal tensile reinforcement ratio. To determine the section modulus of the average strain of the concrete at the compression edge, This represents the influence coefficient of the concrete trough-shaped component in the compression zone.

[0015] The technical solution of this utility model has the following beneficial effects: This utility model discloses a variable cross-section trough-shaped composite support component. By thickening the two ends of the vertical edge of the panel to form side beam segments, the side beam segments have a certain thickness and can withstand sufficient pressure under bending moment to enhance the bearing capacity of the support. The thickness of the side plate segments is less than that of the side beam segments, which reduces material costs and structural self-weight, and facilitates hoisting operations. It solves the technical problem that the edge structure of existing trough-shaped components cannot simultaneously meet the requirements of being lighter than the side beam while maintaining the integrity of a beam. At the same time, it solves the problem of weak bearing capacity of trough-shaped plate supports, reduces the deflection deformation of the trough-shaped plate, increases the stiffness of the trough-shaped plate, reduces the height of the vertical edge of the trough-shaped plate, and increases the structural clearance height. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a plan view of the variable cross-section groove-shaped composite component of the present invention. Figure 2 yes Figure 1 Sectional view of line AA in the middle; Figure 3 yes Figure 1 A cross-sectional view along the BB line.

[0018] Explanation of icon numbers: 1. Panel; 2. Edge beam segment; 3. Side plate segment; 4. Sloping transition segment; 5. Side plate stirrups; 6. Side plate bottom reinforcement; 7. Side plate top reinforcement; 8. Side plate middle reinforcement; 9. Mid-span bottom reinforcement; 10. Span edge bottom reinforcement; 11. Beam bottom reinforcement; 12. Beam top reinforcement; 13. Edge beam stirrups Detailed Implementation

[0019] 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.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] like Figures 1-3 As shown, the present invention proposes a support variable cross-section groove-shaped composite component, including a panel 1 and two strips. The two strips are fixed to the bottom positions of both sides of the panel 1 along the length direction. Each strip includes a side plate segment 3 and two side beam segments 2. The two side beam segments 2 are fixed to both ends of the side plate segment 3. The thickness of the side beam segment 2 is greater than the thickness of the side plate segment 3.

[0025] Furthermore, the height of the edge beam segment 2 is higher than the height of the side plate segment 3, thereby increasing the structural clearance height while reducing material costs and structural weight. The sides of the edge beam segment 2 and the side plate segment 3 can be perpendicular to the panel 1, or they can be inclined on one side or both sides as needed.

[0026] In Example 1, an arc-shaped transition section is provided between the side plate segment 3 and the edge beam segment 2.

[0027] In Example 2, a right-angle transition section is provided between the side plate section 3 and the edge beam section 2.

[0028] In embodiment three, a sloping transition section 4 is provided between the side plate segment 3 and the edge beam segment 2, and the angle between the sloping side and the length side of the edge beam is less than 90°. Which of the above embodiments must be adopted to meet the design and construction requirements of the beam?

[0029] Preferred, such as Figure 2 and Figure 3 As shown, the panel 1 is provided with a mid-span bottom reinforcement 9 and a side-span bottom reinforcement 10. The mid-span bottom reinforcement 9 corresponds to the position of the side plate segment 3, and the side-span bottom reinforcement 10 corresponds to the position of the side beam segment 2.

[0030] Preferably, when calculating the mid-span bottom reinforcement 9, only the side plate segment 3 should be considered. The composite floor slab becomes the compression flange of the side plate segment 3, which can be divided into two cases: one is that the entire compression zone of the section is located within the compression flange, and the other is that the compression zone of the section includes the entire compression flange and part of the side plate segment 3. Through structural modeling and calculation, the mid-span bending moment M can be obtained. Based on the mid-span bending moment M, the cross-sectional area of ​​the mid-span bottom reinforcement 9 can be obtained by calculating it according to the following formula. The expression is as follows: ; In the formula, The support bending moment; This is a coefficient representing the concrete strength grade. This is the design value for the axial compressive strength of concrete. Calculate the width of the compression zone flange at the vertical edge of the support; The height of the compression zone of the cross section when the lower part of the vertical edge is under compression; The effective height of the cross-section; This is the distance from the resultant point of the longitudinal reinforcement in the compression zone to the edge of the compression zone; This is the design value for the tensile strength of the reinforcing steel.

[0031] Preferred, such as Figure 2 As shown, the side beam segment 2 is provided with bottom reinforcement 11, top reinforcement 12, and side beam stirrups 13. The side beam stirrups 13 are fixed to the bottom reinforcement 11, top reinforcement 12, and bottom reinforcement 10 of the span. The side beam stirrups 13 protrude from the panel 1 to be connected with the subsequent cast-in-place concrete.

[0032] Preferred, such as Figure 3 As shown, the side plate segment includes a bottom reinforcement bar 6, a top reinforcement bar 7, a middle reinforcement bar 8, and a stirrup bar 5. The stirrup bar 5 is fixed to the bottom reinforcement bar 6, the top reinforcement bar 7, the middle reinforcement bar 8, and the bottom reinforcement bar 9 at the mid-span. The stirrup bar 5 protrudes from the panel 1 to connect with the subsequent cast-in-place concrete.

[0033] The connection method between the variable cross-section channel-shaped composite member and the support of the present invention is as follows: the bottom reinforcement bars of two adjacent channel-shaped composite members can be straight or bent and anchored into the support below; the negative reinforcement bars of the support are directly connected to the inside of the side beam segment 2 through the steel bars protruding from the bottom plate. The cross-sectional area of ​​the negative reinforcement bars of the support can be calculated through structural modeling to obtain the support bending moment. According to the support bending moment The cross-sectional area of ​​the negative reinforcement at the support can be obtained by calculating using the following formula. Its expression is as follows: ; In the formula, The support bending moment; This is a coefficient related to the concrete strength grade; This is the design value for the axial compressive strength of concrete. The width of the vertical edge of the support; The height of the compression zone of the cross section when the lower part of the vertical edge is under compression; The effective height of the cross-section; This is the distance from the resultant point of the longitudinal reinforcement in the compression zone to the edge of the compression zone; This is the design value for the tensile strength of the reinforcing steel.

[0034] Preferably, the side plate stirrup 5 is in the shape of a figure 9. The side plate stirrup 5 can be integrally formed with the bottom reinforcement 9 at the mid-span, that is, it can be obtained by bending a single steel bar, or the side plate stirrup 5 and the bottom reinforcement 9 at the mid-span can be connected by binding them together.

[0035] Preferably, the stiffness calculation of channel-shaped members differs from that of rectangular, T-shaped, inverted T-shaped, and I-shaped sections. When the member is subjected to bending, the long-term effect of the load will affect the short-term stiffness of the reinforced concrete bending member. Therefore, the stiffness of the channel-shaped composite member with variable cross-section at the support is determined by the short-term stiffness of the reinforced concrete bending member. The calculation yielded: ; In the formula, The elastic modulus of the steel reinforcement. This represents the cross-sectional area of ​​the longitudinal ordinary reinforcing bars in the tension zone. The effective height of the cross section, This is the coefficient of variation of strain in longitudinal tensile ordinary steel reinforcement between cracks. This is the lever arm coefficient. The influence coefficient of strain in longitudinally tensioned ordinary steel-reinforced channel members. This is the ratio of the elastic modulus of the steel reinforcement to the elastic modulus of the concrete. This refers to the longitudinal tensile reinforcement ratio. To determine the section modulus of the average strain of the concrete at the compression edge, This represents the influence coefficient of the concrete trough-shaped component in the compression zone.

[0036] This utility model discloses a variable cross-section trough-shaped composite support component. By thickening the two ends of the vertical edge of the panel 1 to form the side beam segment 2, the side beam segment 2 has a certain thickness and can withstand sufficient pressure under bending moment to enhance the bearing capacity of the support. The thickness of the side plate segment 3 is less than the thickness of the side beam segment 2, which reduces material cost and structural self-weight, and facilitates hoisting operations. It solves the technical problem that the edge structure of existing trough-shaped components cannot simultaneously meet the requirements of being lighter than the side beam and having the integrity of a beam. At the same time, it solves the problem of weak bearing capacity of trough-shaped plate supports, reduces the deflection deformation of the trough-shaped plate, increases the stiffness of the trough-shaped plate, reduces the height of the vertical edge of the trough-shaped plate, and increases the structural clearance height.

[0037] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A variable cross-section groove-shaped composite member for supports, characterized in that, It includes a panel (1) and two strips. The two strips are fixed to the bottom of both sides of the panel (1) along the length direction. The strips include side plate sections (3) and two side beam sections (2). The two side beam sections (2) are fixed to both ends of the side plate section (3). The thickness of the side beam section (2) is greater than the thickness of the side plate section (3).

2. The variable cross-section groove-shaped composite member with support as described in claim 1, characterized in that, An arc-shaped transition section is provided between the side plate section (3) and the edge beam section (2).

3. The variable cross-section groove-shaped composite member with support as described in claim 1, characterized in that, A right-angle transition section is provided between the side plate section (3) and the edge beam section (2).

4. The variable cross-section groove-shaped composite member with support as described in claim 1, characterized in that, A sloping transition section (4) is provided between the side plate section (3) and the side beam section (2), and the angle between the sloping side and the length side of the side beam is less than 90°.

5. The variable cross-section groove-shaped composite member with support as described in claim 1, characterized in that, The panel (1) is provided with a mid-span bottom reinforcement (9) and a side-span bottom reinforcement (10). The mid-span bottom reinforcement (9) corresponds to the position of the side plate segment (3), and the side-span bottom reinforcement (10) corresponds to the position of the side beam segment (2).

6. The variable cross-section groove-shaped composite member with support as described in claim 5, characterized in that, The cross-sectional area of ​​the bottom reinforcement (9) at mid-span The expression is as follows: ； In the formula, The support bending moment; This is a coefficient representing the concrete strength grade. This is the design value for the axial compressive strength of concrete. Calculate the width of the compression zone flange at the vertical edge of the support; The height of the compression zone of the cross section when the lower part of the vertical edge is under compression; The effective height of the cross-section; This is the distance from the resultant point of the longitudinal reinforcement in the compression zone to the edge of the compression zone; This is the design value for the tensile strength of the reinforcing steel.

7. The variable cross-section groove-shaped composite member with support as described in claim 5, characterized in that, The side beam segment (2) is provided with bottom beam reinforcement (11), top beam reinforcement (12) and side beam stirrups (13), and the side beam stirrups (13) are fixed to the bottom beam reinforcement (11), the top beam reinforcement (12) and the bottom reinforcement (10) of the cross side.

8. The variable cross-section groove-shaped composite member with support as described in claim 5, characterized in that, The side plate segment includes a bottom reinforcement (6), a top reinforcement (7), a middle reinforcement (8), and a stirrup (5). The stirrup (5) is fixed to the bottom reinforcement (6), the top reinforcement (7), the middle reinforcement (8), and the bottom reinforcement (9).

9. The variable cross-section groove-shaped composite member with support as described in claim 8, characterized in that, The side plate stirrups (5) are in the shape of a figure 9.

10. The variable cross-section groove-shaped composite member with support as described in claim 1, characterized in that, Short-term stiffness of the reinforced concrete flexural member of the variable cross-section groove composite member with support The expression is as follows: ； In the formula, The elastic modulus of the steel reinforcement. This represents the cross-sectional area of ​​the longitudinal ordinary reinforcing bars in the tension zone. The effective height of the cross section, This is the coefficient of variation of strain in longitudinal tensile ordinary steel reinforcement between cracks. This is the lever arm coefficient. The influence coefficient of strain in longitudinally tensioned ordinary steel-reinforced channel members. This is the ratio of the elastic modulus of the steel reinforcement to the elastic modulus of the concrete. This refers to the longitudinal tensile reinforcement ratio. To determine the section modulus of the average strain of the concrete at the compression edge, This represents the influence coefficient of the concrete trough-shaped component in the compression zone.

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