Multi-section zigzag-form column structure for connecting high and low roofs and construction method of multi-section zigzag-form column structure
By optimizing the vertical support components through a multi-segment folded column structure, the problem of wasted space at the connection between high and low roofs is solved, and the integrity and functionality of the building space are improved, adapting to the optimization of complex structures and visual effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-04-07
AI Technical Summary
At the junction of high and low roofs, vertical components affect the integrity and transparency of the space. Especially in buildings with high ceilings, traditional connection methods lead to wasted space and poor visual effects.
The structure employs a multi-segment folded column structure, including a high-span roof, a low-span roof, lower folded columns, and upper folded columns. Through the design of prestressed bending arms and cantilever arms, the vertical support members are offset to the outside, optimizing the vertical support members from bottom to top. The elastic restoring force of steel is used to counteract downward deflection, forming a positive spatial release element.
It significantly improves the efficiency and functionality of building space, reduces space waste, ensures structural safety, optimizes the stress distribution of vertical support components, adapts to complex intersections and avoids obstacles, and forms a more rhythmic spatial layout.
Smart Images
Figure CN121802991A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of building construction, in particular to a multi-section folded column structure for connecting high-low roof and a construction method thereof. BACKGROUND
[0002] The demarcation point of the high roof and the low roof in modern buildings is often the high-low floor as the demarcation point, and the vertical wall or vertical load-bearing structure is extended from the bottom to the top. Therefore, the vertical component will affect the integrity of the lower space to some extent, the lower space is cut, wasted, and cannot be used completely, and the visual effect may be poor. Especially in high-rise buildings such as airports, which have high requirements for transparency, more attention is paid to the integrity of the space. SUMMARY
[0003] In order to overcome the defects of the prior art, a multi-section folded column structure for connecting high-low roof and a construction method thereof are provided to solve the problem that the high-low span roof cover uses floor demarcation and vertical components support on buildings with high requirements for transparency, which affects the integrity of the space.
[0004] To achieve the above-mentioned purpose, a multi-section folded column structure for connecting high-low roof is provided, comprising: A high-span roof cover is erected on a floor support plate. A low-span roof cover is arranged outside the high-span roof cover, and the low-span roof cover is arranged vertically above the high-span roof cover. A lower folded column comprises a lower vertical column section vertically arranged on the floor support plate and a prestressed bending arm connected to the upper end of the lower vertical column section, and the prestressed bending arm is supported on the low-span roof cover. An upper folded column comprises an upper vertical column section connected to the high-span roof cover and a cantilever arm connected to the upper vertical column section, and the end of the cantilever arm away from the upper vertical column section is hinged to the prestressed bending arm.
[0005] Further, the prestressed bending arm is arranged obliquely upward towards the inner side of the high-span roof cover.
[0006] Further, the upper end of the upper vertical column section is connected to the ring beam of the high-span roof cover.
[0007] Further, the lower vertical column section and the prestressed bending arm are welded, and before welding, a reverse deformation load is applied to the connection area of the lower vertical column section and the prestressed bending arm, so that the prestressed bending arm utilizes the elastic recovery force of the steel material of the prestressed bending arm to offset the deflection when bearing.
[0008] The present application provides a construction method of a multi-section folded column structure for connecting high-low roof, comprising the following steps: mounting a high-span roof on a floor support plate; mounting a lower folded column on the floor support plate, so that the lower folded column is arranged outside the high-span roof; laying a low-span roof on the prestressed bending arm of the lower folded column, so that the low-span roof is arranged vertically staggered with the high-span roof; hoisting and arranging an upper folded column between the high-span roof and the low-span roof; connecting the upper vertical column section of the upper folded column to the high-span roof, and hinging the end of the cantilever arm of the upper folded column away from the upper vertical column section to the prestressed bending arm.
[0009] The multi-section folded column structure for connecting high-low roofs of the present application has the beneficial effect of optimizing the vertical support members from bottom to top through the geometric shape and structural scheme of the folded column, offsetting the vertical support members of the low-span roof to the outside, reducing the problem of space affected by the support structure, transforming the roof connecting member traditionally regarded as a structural obstacle into an "active element" that actively releases, shapes and activates valuable building space, expanding the space layout under the roof, ensuring the integrity of the space under the low roof, significantly improving the space efficiency and functionality of the building under the premise of ensuring the safety of the structure, and the core value lies in solving the problem of space waste caused by traditional connection methods. BRIEF DESCRIPTION OF DRAWINGS
[0010] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 is a structural schematic diagram of the upper vertical column section and the high-span roof.
[0011] Figure 2 is a left view of the multi-section folded column structure for connecting high-low roofs of the present application.
[0012] Figure 3 is a structural schematic diagram of the connection node of the cantilever arm and the prestressed bending arm.
[0013] Figure 4 is a sectional view of H-H in Figure 3
[0014] Figure 5 is a sectional view of I-I in Figure 3
[0015] Figure 6 is a structural schematic diagram of the connection node of the cantilever arm and the prestressed bending arm.
[0016] Figure 7 A plan view of a connecting joint of a cantilever arm and a prestressed bending-resistant arm of an embodiment of the present application.
[0017] Reference signs: high-span roof 1, ring beam 11, web member 12, chord member 13; low-span roof 2; lower folded column 3, lower vertical column section 31, prestressed bending-resistant arm 32; upper folded column 4, upper vertical column section 41, cantilever arm 42; floor slab 5. DETAILED DESCRIPTION
[0018] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended for explaining the related application, and are not intended to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description.
[0019] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.
[0020] Reference Figures 1 to 7 As shown in the drawings, the present application provides a multi-section folded column structure for connecting high-low roofs, comprising: a high-span roof 1, a low-span roof 2, a lower folded column 3, and an upper folded column 4.
[0021] The high-span roof 1 is arranged on the floor slab 5. The low-span roof 2 is arranged below the high-span roof, and the low-span roof 2 is arranged on the outer side of the high-span roof 1. The low-span roof 2 is arranged vertically offset from the high-span roof 1.
[0022] The lower folded column 3 comprises a lower vertical column section 31 and a prestressed bending-resistant arm 32. The lower vertical column section 31 is arranged vertically on the floor slab 5. The prestressed bending-resistant arm 32 is connected to the upper end of the lower vertical column section 31. The prestressed bending-resistant arm 32 is supported on the low-span roof 2.
[0023] The upper folded column 4 comprises an upper vertical column section 41 and a cantilever arm 42. The upper vertical column section 41 is connected to the high-span roof 1. The cantilever arm 42 is connected to the upper vertical column section 41. The end of the cantilever arm 42 away from the upper vertical column section 41 is hinged to the prestressed bending-resistant arm 32.
[0024] In this embodiment, the upper folded column 4 is L-shaped, and the upper vertical column section 41 and the cantilever arm 42 are arranged at a right angle. The lower vertical column section 31 and the prestressed bending-resistant arm 32 are arranged at an obtuse angle. The prestressed bending-resistant arm 32 is arranged obliquely upward toward the inner side of the high-span roof 1.
[0025] As a preferable embodiment, the upper end of the upper vertical column section 41 is connected to the ring beam 11 of the high-span roof 1. In addition, the upper end of the upper vertical column section 41 is connected to the web member 12 and the chord member 13 of the high-span roof 1.
[0026] As a preferable embodiment, the lower vertical column section 31 is connected to the prestressed bending-resistant arm 32 by welding. Before welding, a reverse deformation load is applied to the connection area of the lower vertical column section 31 and the prestressed bending-resistant arm 32, so that the prestressed bending-resistant arm 32 can offset the downward deflection by using the elastic recovery force of the steel material of the prestressed bending-resistant arm 32 when bearing the load.
[0027] The multi-section folded column structure for connecting high-low roof surfaces of the present application realizes the optimization of the vertical member extending from the bottom to the top in a large-span building structure, and ensures the integrity of the lower space.
[0028] The multi-section folded column structure for connecting high-low roof surfaces of the present application optimizes the vertical support member extending from the bottom to the top by the geometric shape and structural scheme of the folded column, offsets the vertical support member of the low-span roof to the outside, reduces the problem of the influence of the support structure on the lower space, transforms the roof connecting member which is traditionally regarded as a structural obstacle into an "active element" that actively releases, shapes and activates the valuable building space, expands the space layout under the roof, ensures the integrity of the lower space of the low roof, significantly improves the space efficiency and functionality of the building under the premise of ensuring the safety of the structure, and the core value lies in solving the problem of space waste caused by the traditional connection method.
[0029] The multi-section folded column structure for connecting high-low roof surfaces of the present application uses a segmented folded design, optimizes the design of the optimal stress point at the folding point position, makes the column body more reasonable in bending moment and shear force distribution when bearing the roof load (self weight, wind, snow, earthquake), reduces the stress concentration of the key section, more flexibly adapts to the complex high-low span roof intersection or avoids multiple obstacles below, and at the same time forms a more rhythmic space division.
[0030] The multi-section folded column structure for connecting high-low roof surfaces of the present application strengthens each weak node, increases the cable at the high roof, designs the built-in reinforcing rib plate at the folding point, and thickens the steel plate node to improve the bending and torsional resistance.
[0031] The multi-section folded column structure for connecting high-low roof surfaces of the application strengthens the upper high-span roof cover by pulling together, supports the lower part, and strengthens the middle node, expands the lower space, and innovatively uses a multi-section folded column, wherein the upper folded column is a right-angle-shaped steel structure column, the vertical angle makes the bending moment naturally decomposed into two orthogonal forces at the turning point, the right-angle design enables the two limbs of the column to bear force cooperatively, and the redundant cross-section force transmission path is clear and simple. For the span of the super-wide span roof surface, a large-angle connecting point is added through the lower folded column, and the roof slope drainage angle is combined.
[0032] The upper folded column and high-span roof cover connecting node is the most important stress part, the upper vertical column section of the upper folded column is connected with the chord and web of the high-span roof cover and the upper box-shaped ring beam through profiled steel, and is reinforced in multiple ways to ensure the stability of the whole. The uppermost part of the upper vertical column section is fixed through interpenetrating welding with the chord / web of the roof cover grid, and an internal partition is additionally arranged inside the upper vertical column section to strengthen the stability, and the lower part is welded and fixed with the box-shaped ring beam through the same interpenetrating welding. On this basis, a steel pull rod is additionally arranged at the intersection of the adjacent vertical straight web (curtain wall column) and the upper chord, and is pulled together with the intersection of the lower folded column and the bottom roof surface, forming an in-plane cable support system, and further strengthening the stability of the whole.
[0033] The folding point position of the upper folded column makes the bending moment and shear force distribution more reasonable when the column bears the roof load (self weight, wind, snow, earthquake), and reduces the stress concentration of the key section. Due to the position, the structure may maintain this state for a long time due to its own gravity, which may cause the inner folding at the right-angle position, therefore, the upper folded column and the lower folded column are hinged to offset this part of the rigid inner folding.
[0034] The multi-section folded column structure for connecting high-low roof surfaces of the application adopts the connection mode of the multi-section folded column, ensures to meet the structure optimization arrangement, considers the roof slope drainage angle, facilitates the rainwater flow, and meets the architectural modeling requirements at the same time.
[0035] The obtuse-angle node structure of the lower folded column includes an obtuse-angle turning section. The turning area of the lower folded column is pre-set with a reverse arch pre-deformation curve, and the pre-deformation amount δ satisfies: δ=L / 400~L / 600 (L is the span of the low-span roof cover). Before welding, a reverse deformation load is pre-applied to the obtuse-angle area, so that the structure utilizes the elastic recovery force of the steel to offset the sagging when bearing.
[0036] Meanwhile, the lower vertical column section of the lower folded column and the prestressed bending arm are connected in a rigid welding manner, a gradient heat input welding method is adopted, and variable parameter welding is adopted: the heat input of the outer weld is 0.8-1.2 kJ / mm, and the main purpose is to control thermal deformation; the heat input of the inner corner root is 1.8-2.2 kJ / mm, and the purpose is to enhance the shear capacity of the melting depth.
[0037] The lower folded column is pre-designed by elastic buckling, a reverse deformation load is pre-applied to the obtuse angle area before welding, so that the lower folded column utilizes the elastic recovery force of the steel to offset the deflection when bearing. The obtuse angle turning area of the lower folded column is pre-set with a reverse arch curve (deflection pre-compensation value = span / 500), and a prestressed bending system is formed after welding, which converts the traditional bending member into a truss mode dominated by axial force, which can minimize the possible middle deflection of the super-wide span.
[0038] The application provides a construction method for connecting a multi-section folded column structure of high-low roof, comprising the following steps: S1, installing a high-span roof 1 on a floor slab 5.
[0039] S2, installing a lower folded column 3 on the floor slab 5, so that the lower folded column 3 is arranged on the outer side of the high-span roof 1.
[0040] S3, laying a low-span roof 2 on the prestressed bending arm 32 of the lower folded column 3, so that the low-span roof 2 is arranged in a staggered manner with the high-span roof 1.
[0041] S4, hoisting and arranging an upper folded column 4 between the high-span roof 1 and the low-span roof 2.
[0042] S5, connecting the upper vertical column section 41 of the upper folded column 4 to the high-span roof 1, and hingedly connecting the end of the cantilever arm 42 of the upper folded column 4 away from the upper vertical column section 41 to the prestressed bending arm 32.
[0043] The multi-section folded column structure for connecting high-low roof of the application is suitable for buildings with high height and high permeability requirements such as airports, and can optimize the vertical member extending from the bottom to the top in a large span, and ensure the integrity of the lower space.
[0044] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. Those skilled in the art should understand that the application range involved in the application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or equivalent features without departing from the inventive concept. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the application (but not limited to) having similar functions.
Claims
1. A multi-segment folded column structure for connecting roofs of different heights, characterized in that, include: A high-span roof, supported on a floor slab; A low-span roof is disposed outside the high-span roof, and the low-span roof and the high-span roof are offset vertically. The folded column includes a lower vertical column section erected on the floor slab and a prestressed bending arm connected to the upper end of the lower vertical column section, the prestressed bending arm being supported by the low-span roof. The upper folded column includes an upper vertical column section connected to the high-span roof and a cantilever arm connected to the upper vertical column section, wherein the end of the cantilever arm away from the upper vertical column section is hinged to the prestressed bending arm.
2. The multi-segment folded column structure for connecting roofs of different heights according to claim 1, characterized in that, The prestressed bending arm is set obliquely upward toward the inside of the high-span roof.
3. The multi-segment folded column structure for connecting roofs of different heights according to claim 1, characterized in that, The upper end of the vertical column section is connected to the ring beam of the high-span roof.
4. The multi-segment folded column structure for connecting roofs of different heights according to claim 1, characterized in that, The lower vertical column section is welded to the prestressed bending arm. Before welding, a reverse deformation load is applied to the connection area between the lower vertical column section and the prestressed bending arm, so that the prestressed bending arm can use the elastic restoring force of the steel to offset the deflection when bearing load.
5. A construction method for a multi-segment folded column structure for connecting roofs of different heights, as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Install a high-span roof on the floor deck; Install downward-folding columns on the floor deck, such that the downward-folding columns are located on the outer side of the high-span roof; The low-span roof is laid on the prestressed bending arm of the lower folded column, so that the low-span roof and the high-span roof are staggered vertically. The folded column is hoisted and installed between the high-span roof and the low-span roof; The upper vertical column section of the upper folded column is connected to the high-span roof, and the end of the cantilever arm of the upper folded column away from the upper vertical column section is hinged to the prestressed bending arm.