Self-balanced lap joint column conversion structure of inclined web plate truss

Abstract

This invention discloses a self-balancing lapped column transfer structure with a diagonal web truss, belonging to the field of structural engineering technology. It solves the problems of abrupt changes in lateral stiffness caused by existing transfer structures and the narrow applicability of existing lapped column transfer structures. The self-balancing lapped column transfer structure of this invention includes an lapped upper column, an lapped lower column, an lapped block, connected vertical members, an upper chord, a lower chord, and diagonal web members. The upper chord, lower chord, and diagonal web members constitute a self-balancing truss. The upper chord, lower chord, and diagonal web members are all connected to the lapped block and surrounding vertical members. The introduction of the self-balancing truss can self-balance the axial forces of the floor slabs above and below the lapped block, thereby greatly reducing the shear force of the connected vertical members. It also reduces abrupt changes in lateral stiffness, improves the seismic performance of the transfer structure, and is particularly suitable for high-rise transfers. This invention can be used for various high-rise and super high-rise transfer structures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of structural engineering, and in particular to a self-balanced lap column conversion structure with inclined web member truss. BACKGROUND

[0002] As a key component of high-rise building structure with conversion layer, how to improve the form of conversion structure becomes a key problem and technical difficulty in the seismic design of building with conversion layer.

[0003] In the prior art, the lap column conversion structure, as shown in the figure, comprises a lap upper column 01, a lap lower column 02, a lap block 03, an upper chord 04 in the upper floor system, a lower chord 05 in the lower floor system, and a connected vertical member 06, the lap block 03 is located between the bottom end of the lap upper column 01 and the top end of the lap lower column 02, and the lap block 03 and the connected vertical member 06 are connected with the upper chord 04 and the lower chord 05. Figure 1 Under the action of the axial force N of the lap upper column 01 generated under the gravity load, the upper chord 04 and the lower chord 05 generate an axial force T, T≈N*C / h, C is the size of the lap block in the horizontal direction, and h is the size of the lap block in the height direction, and the shear force V≈T / 2 of the connected vertical member 06.

[0004] As can be seen from the above, the upper chord and the lower chord are subjected to a large tensile force and a large compressive force, and the connected vertical member is subjected to a large shear force and a large bending moment. The existing lap column conversion structure is only applicable to the special case of direct connection and anchoring to the cylinder, and when it is used for a frame structure, the axial tensile and compressive forces of the upper and lower floor system beams and slabs will cause the shear force of the connected vertical member frame column to suddenly increase, which may cause the shear capacity of the connected vertical member frame column to be insufficient, and the applicable range is narrow. SUMMARY

[0005] The embodiment of the present application provides a self-balanced lap column conversion structure with inclined web member truss, which retains the advantages of the lap column conversion structure, and balances the axial force of the upper and lower floor system beams and slabs generated by the lap column conversion through the setting of the inclined web member truss, greatly reduces the shear force and bending moment of the connected vertical member, ensures the safety reserve and seismic ductility of the connected vertical member, and has a wider range of application.

[0006] To achieve the above object, the embodiment of the present application adopts the following technical scheme:

[0007] The embodiment of the present application provides a self-balanced overlap column conversion structure of a diagonal web truss, which comprises: at least one upper chord; at least one lower chord arranged in parallel below the upper chord; a connected vertical component fixedly connected with the upper chord and the lower chord; an overlap block used for connecting an overlap upper column and an overlap lower column, arranged at one end of the upper chord and the lower chord and fixedly connected with the upper chord and the lower chord; the overlap upper column arranged at the top of the overlap block; the overlap lower column arranged at the bottom of the overlap block; and a web group arranged between the upper chord and the lower chord, used for reducing axial force generated by the upper chord and the lower chord.

[0008] Optionally, the web group comprises a diagonal web, which is connected with the overlap block, the upper chord, the connected vertical component and the lower chord.

[0009] Further, the diagonal web is hinged with the overlap block, the upper chord, the connected vertical component and the lower chord.

[0010] Optionally, the web group comprises a plurality of diagonal webs and a plurality of straight webs, the plurality of diagonal webs and the plurality of straight webs are sequentially connected in a head-to-tail mode, and both ends of the web group are diagonal webs; wherein the plurality of diagonal webs and the plurality of straight webs are connected with the upper chord and the lower chord, one of the two diagonal webs at both ends of the web group is connected with the overlap block and the lower chord, and the other is connected with the connected vertical component and the upper chord; or one of the two diagonal webs at both ends is connected with the overlap block and the upper chord, and the other is connected with the connected vertical component and the lower chord.

[0011] Optionally, the connected vertical component is at least one of a shear wall, a frame column and a corner column.

[0012] Optionally, in the horizontal direction, the overlap upper column is closer to the connected vertical component than the overlap lower column.

[0013] Optionally, in the horizontal direction, the overlap upper column is farther away from the connected vertical component than the overlap lower column.

[0014] The self-balanced overlap column conversion structure of the diagonal web truss provided by the embodiment of the present application has the advantages of less concrete consumption, low cost, small self-weight, fully utilized building space and small lateral rigidity mutation. In addition, the web group is arranged between the upper chord and the lower chord arranged in parallel below the upper chord, and the web group is used for reducing axial force generated by the upper chord and the lower chord, so that the shear force borne by the connected vertical component is correspondingly reduced, and the application range is wider. BRIEF DESCRIPTION OF DRAWINGS

[0015] 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 will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0016] Figure 1 A lap joint column conversion structure in the prior art;

[0017] Figure 2 A structural schematic diagram of a self-balanced lap joint column conversion structure of a diagonal web member truss provided by the present application;

[0018] Figure 3 A structural schematic diagram of another self-balanced lap joint column conversion structure of a diagonal web member truss provided by the present application;

[0019] Figure 4 A structural schematic diagram of a self-balanced lap joint column conversion structure of a diagonal web member truss provided by the present application has a diagonal web member and a straight web member;

[0020] Figure 5 A structural schematic diagram of a high-rise building provided by the present application.

[0021] Reference signs:

[0022] 01-lap joint upper column; 02-lap joint lower column; 03-lap joint block; 04-upper chord; 05-lower chord; 06-connected vertical member; 1-upper chord; 2-lower chord; 3-connected vertical member; 4-lap joint block; 5-lap joint upper column; 6-lap joint lower column; 7-diagonal web member; 8-straight web member. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0024] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] The terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified or limited.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0027] The embodiment of the present application provides a self-balancing lap column conversion structure of inclined web member truss, referring to Figure 2 and Figure 5 or referring to Figure 3 and Figure 5 , comprising: at least one upper chord 1; at least one lower chord 2 arranged in parallel below the upper chord 1; a connected vertical member 3 fixedly connected with the upper chord 1 and the lower chord 2; a lap block 4 for connecting a lap upper column 5 and a lap lower column 6, arranged at one end of the upper chord 1 and the lower chord 2, and fixedly connected with the upper chord 1 and the lower chord 2; the lap upper column 5 is arranged at the top of the lap block 4; the lap lower column 6 is arranged at the bottom of the lap block 4; a web member group is arranged between the upper chord 1 and the lower chord 2, and the web member group is used to reduce the axial force generated by the upper chord 1 and the lower chord 2.

[0028] The self-balancing lap column conversion structure of inclined web member truss provided by the embodiment of the present application, referring to Figure 2 and Figure 5 or referring to Figure 3 and Figure 5 , the amount of concrete is less, the cost is low, the self weight is small, the building space can be fully utilized, and the lateral stiffness mutation is small. In addition, the web member group is arranged between the upper chord 1 and the lower chord 2 located below the upper chord 1 and parallel to the upper chord 1, and the web member group is used to reduce the axial force generated by the upper chord 1 and the lower chord 2, so that the shear force borne by the connected vertical member 3 is correspondingly reduced, and the application range is wider.

[0029] Referring to Figure 2 and Figure 5 or referring to Figure 3 and Figure 5, the web member group comprises a diagonal web member 7 connected with the overlapping block 4, the upper chord 1, the connected vertical member 3 and the lower chord 2. In detail, referring to Figure 2 , one end of the diagonal web member 7 is connected with the overlapping block 4 and the lower chord 2, and the other end is connected with the connected vertical member 3 and the upper chord 1. Or, referring to Figure 3 , one end of the diagonal web member 7 is connected with the overlapping block 4 and the upper chord 1, and the other end is connected with the connected vertical member 3 and the lower chord 2. At this time, the upper chord 1 and the lower chord 2 parallel to the upper chord 1 are provided with the diagonal web member 7. In this way, under the action of the axial force N of the overlapping upper column 5 generated by the gravity load, the upper chord 1 and the lower chord 2 generate axial force T', and the diagonal web member 7 generates axial force T 斜 , T'≈N*C / h-T 斜 cosθ, N is the axial force of the overlapping upper column 5, C is the width of the overlapping block 4 in the length direction of the upper chord 1, h is the size of the overlapping block 4 in the height direction, T 斜 is the axial force of the diagonal web member 7, and θ is the acute angle formed by the diagonal web member 7 and the upper chord 1 or the lower chord 2. At this time, the shear force V'≈T' / 2 borne by the connected vertical member 3. As can be seen from the above, due to the introduction of the diagonal web member 7, the axial force generated by the upper chord 1 and the lower chord 2 is degraded from T≈N*C / h to T'≈N*C / h-T 斜 cosθ, which effectively reduces the axial force generated by the upper chord 1 and the lower chord 2, further degrades the shear force borne by the connected vertical member 3 from V≈T / 2 to V'≈T' / 2, and reduces the shear force borne by the connected vertical member 3. In addition, the diagonal web member truss self-balancing overlapping column conversion structure provided by the embodiment of the present application can change the size of the axial force T 斜 generated by the diagonal web member 7 by adjusting the rigidity of the diagonal web member 7, and further adjust the size of the shear force borne by the connected vertical member 3, so that the application range is wider.

[0030] It should be noted that the size of the rigidity of the diagonal web member 7 can be adjusted by controlling the size of the cross section of the diagonal web member 7. Specifically, the larger the size of the cross section of the diagonal web member 7, the greater the rigidity, and the greater the axial force T 斜 borne, so that the shear force borne by the connected vertical member 3 is smaller; on the contrary, the smaller the size of the cross section of the diagonal web member 7, the smaller the rigidity, and the smaller the axial force T 斜 borne, so that the shear force borne by the connected vertical member 3 is greater. Here, the upper chord 1 is usually a beam structure in the upper floor slab, and the lower chord 2 is usually a beam structure in the lower chord 2, which is not limited here.

[0031] In view of the above, the inclined web member 7 can reduce the axial force on the top chord 1 and the bottom chord 2, and reduce the shear force on the connected vertical member 3. Therefore, the connected vertical member 3 can be selected from a wider range. For example, the connected vertical member 3 can be at least one of a shear wall, a frame column, and a corner column. That is, the top chord 1 and the bottom chord 2 can be fixedly connected to one or more of the shear wall, the frame column, and the corner column. Here, according to the requirements of the design-related specifications of the different connected vertical members 3, the rigidity of the corresponding inclined web member 7 is adjusted to adjust the size of the shear force on the inclined web member 7, thereby ensuring the safety reserve and seismic ductility of the connected vertical member 3. Of course, the connected vertical member 3 can also be other, which is not limited here.

[0032] According to the formula of the axial force on the top chord 1 and the bottom chord 2, as shown in Figure 2 or Figure 3 The size of the acute angle θ in the included angle between the inclined web member 7 and the bottom chord 2 is positively correlated with the size of the axial force on the top chord 1 and the bottom chord 2, that is, the smaller the acute angle θ in the included angle between the inclined web member 7 and the bottom chord 2, the smaller the axial force on the top chord 1 and the bottom chord 2; the larger the acute angle θ in the included angle between the inclined web member 7 and the bottom chord 2, the larger the axial force on the top chord 1 and the bottom chord 2. Preferably, the size of the acute angle θ in the included angle between the inclined web member 7 and the bottom chord 2 is 30°-45°, the connection effect of the inclined web member 7 and the top chord 1 and the bottom chord 2 is good, the conversion efficiency of the axial force on the inclined web member 7 is high, which can effectively reduce the axial force on the top chord 1 and the bottom chord 2, greatly reduce the shear force and bending moment on the connected vertical member 3, and ensure the safety reserve and seismic ductility of the connected vertical member 3. It should be understood that, since the top chord 1 and the bottom chord 2 are arranged in parallel, the size of the acute angle θ in the included angle between the inclined web member 7 and the bottom chord 2 is consistent with the size of the acute angle θ in the included angle between the inclined web member 7 and the top chord 1, that is, the size of the acute angle θ in the included angle between the inclined web member 7 and the top chord 1 is also 30°-45°.

[0033] In order to better transfer the axial force of the above inclined web member 7, referring to Figure 2 or Figure 3, the diagonal web member 7 is hinged with the overlapping block 4, the upper chord 1, the connected vertical member 3 and the lower chord 2. In the case that one end of the diagonal web member 7 is connected with the overlapping block 4 and the lower chord 2 and the other end is connected with the connected vertical member 3 and the upper chord 1, one end of the diagonal web member 7 is hinged with the overlapping block 4 and the lower chord 2 and the other end is hinged with the connected vertical member 3 and the upper chord 1. In the case that one end of the diagonal web member 7 is connected with the overlapping block 4 and the upper chord 1 and the other end is connected with the connected vertical member 3 and the lower chord 2, one end of the diagonal web member 7 is hinged with the overlapping block 4 and the upper chord 1 and the other end is hinged with the connected vertical member 3 and the lower chord 2. At this time, the diagonal web member 7 is hinged with the overlapping block 4, the upper chord 1, the connected vertical member 3 and the lower chord 2, so that the end of the diagonal web member 7 can be slightly rotated, which is beneficial to release the bending moment and further can more effectively transfer the axial force, that is, under the same conditions, compared with the diagonal web member 7 directly hinged with the overlapping block 4, the upper chord 1, the connected vertical member 3 and the lower chord 2, the diagonal web member 7 hinged at both ends with the overlapping block 4, the upper chord 1, the connected vertical member 3 and the lower chord 2 respectively has a larger value of T 斜 , the axial force on the upper chord 1 and the lower chord 2 is smaller, the shear force and the bending moment on the connected vertical member 3 are greatly reduced, and the safety reserve and the seismic ductility of the connected vertical member 3 are ensured.

[0034] In other embodiments, with reference to Figure 2 , Figure 4 and Figure 5The web member assembly includes multiple diagonal web members 7 and multiple straight web members 8, which are connected end-to-end in sequence. Both ends of the web member assembly are diagonal web members 7. Each of the diagonal web members 7 and the straight web members 8 is connected to the upper chord 1 and the lower chord 2. One of the two diagonal web members 7 located at each end of the web member assembly is connected to the overlapping block 4 and the lower chord 2, while the other is connected to the connected vertical member 3 and the upper chord 1; or, one of the two diagonal web members 7 located at each end is connected to the overlapping block 4 and the upper chord 1, while the other is connected to the connected vertical member 3 and the lower chord 2. This arrangement significantly reduces the axial force on the upper chord 1 and the lower chord 2, and significantly reduces the shear force and bending moment on the connected vertical member 3. Here, the number of diagonal web members 7 and straight web members 8 can be determined based on the length of the upper chord 1 or the lower chord 2 and the angle between the diagonal web members 7 and the lower chord 2. Generally, the acute angle θ formed by the diagonal web members 7 and the lower chord 2 is 30° to 45°. Of course, the distribution of the multiple diagonal web members 7 along the extension direction of the upper chord 1 is not limited to a uniform distribution, and will not be listed here. Furthermore, this arrangement can reduce the axial force on the upper chord 1 and the lower chord 2, reduce the shear force and bending moment on the connected vertical members 3, and improve the structural safety. Here, the connections at both ends of the aforementioned multiple diagonal web members 7 and multiple straight web members 8 to other structures can also be hinged, and this is not limited here.

[0035] Depending on the application scenario, the relative positions of the upper overlapping column 5 and the lower overlapping column 6 on the overlapping block 4 are not unique. For example, refer to... Figure 2 and Figure 5 In the horizontal direction, the upper column 5 is closer to the connected vertical member 3 than the lower column 6; for example, referring to Figure 3 and Figure 5 In the horizontal direction, the upper column 5 is further away from the connected vertical member 3 than the lower column 6.

[0036] The following is combined Figure 2 and Figure 5 An embodiment in which the overlapping upper column 5 is closer to the connected vertical member 3 in the horizontal direction than the overlapping lower column 6 is described in detail.

[0037] Reference Figure 2 and Figure 5In the horizontal direction, the upper lapping column 5 of the diagonal web member truss self-balanced lapping column conversion structure provided by the embodiment of the present application is closer to the connected vertical member 3 than the lower lapping column 6. At this time, the connection position of the diagonal web member 7 and the upper chord 1 is farther away from the lapping block 4 than the connection position of the diagonal web member 7 and the lower chord 2. In this way, the force on the diagonal web member 7 is a pulling force, that is, the diagonal web member 7 functions as a pull rod, which is conducive to better transmission of the axial force by the diagonal web member 7. The rigidity of the diagonal web member 7 can be adjusted by adjusting the size of the cross section of the diagonal web member 7 to change the size of the axial force T 斜 generated by the diagonal web member 7, so as to make the shear force borne by the connected vertical member 3 meet the requirements of the relevant design specifications, thereby ensuring the safety reserve and seismic ductility of the connected vertical member 3. Of course, the connection position of the diagonal web member 7 and the upper chord 1 can also be farther away from the lapping block 4 than the connection position of the diagonal web member 7 and the lower chord 2, which is not limited herein.

[0038] The embodiment in which the upper lapping column 5 is farther away from the connected vertical member 3 than the lower lapping column 6 in the horizontal direction will be described in detail below. Figure 3 Figure 5 The embodiment in which the upper lapping column 5 is farther away from the connected vertical member 3 than the lower lapping column 6 in the horizontal direction will be described in detail below.

[0039] Referring to Figure 3 and Figure 5 , in the horizontal direction, the upper lapping column 5 of the diagonal web member truss self-balanced lapping column conversion structure provided by the embodiment of the present application is farther away from the connected vertical member 3 than the lower lapping column 6. At this time, the connection position of the diagonal web member 7 and the upper chord 1 is closer to the lapping block 4 than the connection position of the diagonal web member 7 and the lower chord 2. In this way, the force on the diagonal web member 7 is a pulling force, that is, the diagonal web member 7 functions as a pull rod, which is conducive to better transmission of the axial force by the diagonal web member 7. The rigidity of the diagonal web member 7 can be adjusted by adjusting the size of the cross section of the diagonal web member 7 to change the size of the axial force T 斜 generated by the diagonal web member 7, so as to make the shear force borne by the connected vertical member 3 meet the requirements of the relevant design specifications, thereby ensuring the safety reserve and seismic ductility of the connected vertical member 3. Of course, the connection position of the diagonal web member 7 and the upper chord 1 can also be farther away from the lapping block 4 than the connection position of the diagonal web member 7 and the lower chord 2, which is not limited herein.

[0040] When the diagonal web member truss self-balanced lapping column conversion structure is used for various high-rise and super high-rise conversion structures, and the building structure of the high-rise building is a reinforced concrete structure, the lapping block 4 can be a reinforced concrete structure integrated with the frame structure of the high-rise building, that is, the lapping block 4 belongs to part of the main frame structure of the high-rise building.

[0041] ​In the description of the above-mentioned embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A self-balanced webbed column transfer structure with diagonal web members truss, characterized by, The utility model relates to a kind of steel frame structures, including: At least one upper chord; At least one lower chord arranged in parallel directly below the upper chord; Connected vertical members, fixedly connected with the upper chord and the lower chord; Lap block, for connecting lap upper column and lap lower column, arranged in one end of the upper chord and the lower chord, and fixedly connected with the upper chord and the lower chord; Lap upper column, arranged at the top of the lap block; Lap lower column, arranged at the bottom of the lap block; Web group, arranged between the upper chord and the lower chord, the web group is used to reduce the axial force generated by the upper chord and the lower chord; The web group includes an inclined web, which is connected with the lap block, the upper chord, the connected vertical member and the lower chord; The inclined web is hinged with the lap block, the upper chord, the connected vertical member and the lower chord.

2. The diagonal web tube self-balanced diaphragm transfer structure of claim 1, wherein, The connected vertical member is at least one of shear wall, frame column, corner column.

3. The diagonal web tube self-balanced diaphragm transfer structure according to claim 1 or 2, characterized in that, In the horizontal direction, the lap upper column is closer to the connected vertical member than the lap lower column.

4. The diagonal web tube self-balanced diaphragm braced column transfer structure according to claim 1 or 2, characterized in that, In the horizontal direction, the lap upper column is farther away from the connected vertical member than the lap lower column.

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