Large slope roof anti-sliding support based on steel bar truss floor support plate and construction method

Abstract

The present application relates to the technical field of steel structure slope roof construction, and discloses a large slope roof anti-skid support based on a steel bar truss floor support plate and a construction method, a large slope roof anti-skid support based on a steel bar truss floor support plate, which comprises an I-shaped steel and a floor support plate, the I-shaped steel is fixedly connected in a steel frame main structure of a slope roof, and further comprises a support plate, the support plate is fixedly connected at the top of the I-shaped steel, and the floor support plate is laid on the top of the support plate; a horizontal steel bar cage is welded and fixed in the support plate, and the horizontal steel bar cage is used for limiting and fixing the floor support plate laid on the support plate; the present application precisely weakens the lateral stiffness of the large slope roof through the flexible connection structure cooperating with the sectional structure joint structure, utilizes the flexible cooperation of the limiting column and the horizontal bearing rib, allows the structure to produce a slight displacement to release the temperature and shrinkage stress, eliminates the node stress concentration hidden danger, and greatly improves the crack resistance and durability of the roof panel.

Description

Technical Field

[0001] This invention relates to the field of steel structure sloping roof construction technology, specifically to an anti-slip support and construction method for a high-slope sloping roof based on a steel truss floor slab. Background Technology

[0002] With the increasing diversification of building forms, steeply pitched roofs have been widely used in various public buildings, sports venues, and distinctive residences due to their excellent drainage performance and unique architectural aesthetics.

[0003] However, steeply sloping roofs face a series of technical challenges in structural design and construction: First, the traditional structural design of steeply sloping roofs is usually based on shear walls, where the roof panels are used as rigid lateral force resisting components to participate in the overall structural stress. This shear wall design results in excessive stiffness of the roof layer, causing a sudden change in stiffness between the roof and the underlying main structure, creating an unfavorable "top-heavy" stress state, which is prone to structural stiffness imbalance under earthquake or wind loads. Second, on roofs with a large slope, the sliding force component generated by the self-weight of concrete along the slope direction increases significantly, and traditional support systems and floor decking cannot provide sufficient anti-slip capacity, reducing the overall stability of steeply sloping roofs. Summary of the Invention

[0004] This invention provides an anti-slip support and construction method for steeply sloping roofs based on steel truss floor slabs. By flexibly connecting and structural joints to weaken stiffness and release stress, it improves crack resistance. By utilizing the steel cage and truss system to form an integral force-bearing structure, it achieves "replacing walls with slabs," effectively resisting the gravity sliding component and significantly improving the overall stability of steeply sloping roofs. This solves the problem mentioned in the background art that traditional shear wall designs for steeply sloping roofs lead to stiffness imbalance and insufficient anti-slip capacity, making it difficult to resist the sliding force of concrete and reducing the overall structural stability.

[0005] This invention provides the following technical solution:

[0006] An anti-slip support for a high-slope roof based on a steel truss floor deck includes an I-beam and a floor deck. The I-beam is fixedly connected to the main steel frame structure of the sloping roof. The support also includes: a support plate fixedly connected to the top of the I-beam, with the floor deck laid flat on top of the support plate; a transverse steel cage welded and fixed inside the support plate, used to limit and fix the floor deck laid on the support plate; and a flexible connection structure positioned between the floor deck and the main steel frame structure to balance the loads on both.

[0007] As a preferred technical solution of the present invention, multiple sets of supports are installed on the top of the floor deck along the slope direction, and multiple longitudinal bearing bars distributed along the slope direction are inserted between the multiple sets of supports in the same longitudinal direction. The multiple longitudinal bearing bars, the multiple sets of supports, and the floor deck together form a steel truss system.

[0008] As a preferred embodiment of the present invention, the flexible connection structure includes limiting columns, which are fixedly connected to the main steel frame structure. Multiple sets of limiting columns are distributed along the slope direction of the main steel frame structure. Transverse bearing bars are installed between the limiting columns located on both sides of the floor slab and aligned with each other. The transverse bearing bars are distributed perpendicularly to the longitudinal bearing bars and pass perpendicularly through the steel truss system, forming a steel support system in cooperation with the steel truss system.

[0009] A construction method for a steeply sloping roof based on a reinforced truss floor slab includes the following steps:

[0010] Step 1: Slope identification and unit division;

[0011] Step 2: Arrangement of anti-slip bearings;

[0012] Step 3: Laying the steel truss support system;

[0013] Step 4: Construction of structural joints;

[0014] Step 5: Segmented assembly line operation and concrete pouring.

[0015] As a preferred technical solution of the present invention, the slope identification and unit division are specifically as follows: based on the actual slope data of the roof, the roof is divided into a high slope area and a low slope area, and the roof is divided into multiple independent floor slab units along the slope direction, and a segmented structural joint is set between two adjacent sets of independent floor slab units.

[0016] As a preferred technical solution of the present invention, the anti-slip support arrangement is as follows: an anti-slip support is provided between each independent floor slab unit and the main steel frame structure, and the anti-slip support and the main steel frame structure are rigidly fixed by bolt welding.

[0017] As a preferred embodiment of the present invention, the steel truss support system is laid out as follows:

[0018] Floor decking is laid above two adjacent sets of anti-slip bearings, and corresponding supports and longitudinal bearing bars are installed on the floor decking to form a steel truss system.

[0019] A transverse steel reinforcement cage is laid and welded inside the anti-slip bearing;

[0020] The steel truss system and the transverse steel cage are connected and welded together by stirrups to form an integrated load-bearing system consisting of the steel truss system, the transverse steel cage and the anti-slip support.

[0021] As a preferred technical solution of the present invention, a flexible connection structure is adopted between the steel truss system and the main steel frame structure to balance the load and improve the uniformity of the overall stress system.

[0022] As a preferred technical solution of the present invention, the structural joint is constructed as follows: the width of the segmented structural joint is 20mm, a water-swellable waterstop strip is embedded in the joint, and a water-blocking structure is set above the waterstop strip to achieve waterproofing and stress release.

[0023] As a preferred embodiment of the present invention, the water-blocking structure is a metal water-blocking plate or a concrete water-blocking sill installed above the water-stop strip to prevent rainwater from seeping into the interior of the structure along the structural joints.

[0024] Compared with the prior art, the present invention provides an anti-slip support for a steeply sloping roof based on a steel truss floor slab and a construction method thereof, which has the following beneficial effects:

[0025] 1. This anti-slip support for steeply sloping roofs based on steel truss floor slabs precisely weakens the lateral stiffness of steeply sloping roofs through a flexible connection structure and segmented structural joint construction. By utilizing the flexible cooperation between the limiting columns and the transverse bearing reinforcement, the structure is allowed to produce small displacements to release temperature and shrinkage stresses. This not only eliminates the hidden danger of stress concentration at nodes, but also significantly improves the crack resistance and durability of the roof panels.

[0026] 2. This anti-slip support for steeply sloping roofs based on steel truss floor decks forms a spatially stable overall force-bearing system by connecting the transverse steel cage within the support to the steel truss system on the floor deck with stirrups and welding. This not only endows the floor deck with extremely high in-plane stiffness and load-bearing capacity, achieving structural optimization of "replacing walls with slabs", but also provides extremely strong gripping force and shear resistance by utilizing a dense steel mesh, effectively resisting the gravity sliding component of steeply sloping roofs during concrete pouring and use, and effectively improving the overall stability of steeply sloping roofs. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0028] Figure 1 This is a first-view perspective stereoscopic diagram of the present invention;

[0029] Figure 2 For the present invention Figure 1 Enlarged structural diagram of region A in the middle;

[0030] Figure 3 This is a second-view perspective stereoscopic diagram of the present invention;

[0031] Figure 4 This is a side-view perspective view of the present invention;

[0032] Figure 5 This is a side view cross-sectional structural diagram of the present invention;

[0033] Figure 6 For the present invention Figure 5 Enlarged structural diagram of region B in the middle;

[0034] Figure 7 This is a flowchart of the construction method steps of the present invention.

[0035] In the diagram: 1. I-beam; 2. Floor deck; 21. Support; 22. Longitudinal reinforcing bar; 3. Support plate; 4. Transverse reinforcing cage; 5. Limiting column; 51. Transverse reinforcing bar. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] Reference Figures 1-6 A high-slope roof anti-slip support based on a steel truss floor deck includes an I-beam 1 and a floor deck 2. The I-beam 1 is fixedly connected to the main steel frame structure of the sloping roof. The support plate 3 is fixedly connected to the top of the I-beam 1, and the floor deck 2 is laid flat on top of the support plate 3. A transverse steel cage 4 is welded and fixed inside the support plate 3, and is used to limit and fix the floor deck 2 laid on the support plate 3. A flexible connection structure is set between the floor deck 2 and the main steel frame structure to balance the loads on the floor deck and the main steel frame structure.

[0039] Reference Figures 1-6Multiple sets of supports 21 are installed on the top of the floor deck 2 along the slope direction. Multiple longitudinal bearing bars 22, distributed along the slope direction, are inserted between the multiple sets of supports 21 in the same longitudinal direction. These longitudinal bearing bars 22, together with the multiple sets of supports 21 and the floor deck 2, form a steel truss system. The steel truss system is connected to the transverse steel cage 4 within the anti-slip support by stirrups and welded together, forming a spatially stable overall force-bearing system. This gives the floor deck 2 itself extremely high in-plane stiffness and load-bearing capacity, thus completely avoiding the need for the roof slab to be designed as a "shear wall" in traditional designs. The "truss force of the floor deck 2 itself" replaces the "rigidity" of the shear wall. The "lateral resistance" design solves the structural stiffness imbalance problem caused by excessive roof stiffness. In addition, the truss structure formed by the insertion of the pier 21 and the longitudinal bearing reinforcement 22 is deeply embedded in the concrete, providing extremely strong bond strength and shear resistance. It effectively resists the sliding force during concrete pouring and the gravity component during the service stage, preventing the floor slab from sliding along the slope and ensuring construction safety and structural stability. Furthermore, the steel truss system is evenly distributed on the top of the floor slab 2, forming a dense steel mesh. By utilizing the ductility of steel to absorb and disperse stress, it prevents the generation and propagation of cracks, greatly enhancing the crack resistance of the roof panel and improving the durability and waterproofing of the roof.

[0040] Reference Figures 1-6 The flexible connection structure includes limiting columns 5, which are fixedly connected to the main steel frame structure. Multiple sets of limiting columns 5 are distributed along the slope of the main steel frame structure. Transverse bearing reinforcement 51 is installed between the mutually aligned limiting columns 5 located on both sides of the floor slab 2. The transverse bearing reinforcement 51 is perpendicular to the longitudinal bearing reinforcement 22 and passes perpendicularly through the steel truss system, forming a steel reinforcement support system in conjunction with the steel truss system. This structure, through the cooperation of the limiting columns 5 and the transverse bearing reinforcement 51, allows for a small displacement space between the floor slab 2 and the steel frame, replacing the rigid lateral resistance of the shear wall with flexible force bearing. This effectively weakens the lateral stiffness of the roof layer, avoiding the "top-heavy" or sudden stiffness changes caused by excessive roof stiffness, thus preventing overall structural stiffness imbalance and making the building more rationally stressed under earthquakes or wind loads. In addition, the limiting column 5 is fixed to the steel frame, providing vertical stability, and the transverse bearing reinforcement 51 passes through the steel truss system, providing horizontal restraint. First, it effectively prevents the floor slab 2 from slipping before concrete pouring or during use. Second, it effectively transfers the load on the floor slab 2 to the steel frame through the transverse bearing reinforcement 51, balancing the stress at the nodes and improving the overall structural stability.

[0041] Example 2:

[0042] Reference Figures 1-7 Based on Example 1, a construction method for a high-slope pitched roof based on a steel truss floor slab is proposed, including the following steps:

[0043] Step 1: Slope identification and unit division;

[0044] Step 2: Arrangement of anti-slip bearings;

[0045] Step 3: Laying the steel truss support system;

[0046] Step 4: Construction of structural joints;

[0047] Step 5: Segmented assembly line operation and concrete pouring.

[0048] Slope identification and unit division are as follows: Based on the actual slope data of the roof, the roof is divided into high slope area and low slope area, and the roof is divided into multiple independent floor slab units along the slope direction. A segmented structural joint is set between two adjacent sets of independent floor slab units. The length of each independent floor slab unit does not exceed 3m.

[0049] The anti-slip support arrangement is as follows: Anti-slip supports are set between each independent floor slab unit and the main steel frame structure, and the anti-slip supports are rigidly fixed to the main steel frame structure by bolts and welding.

[0050] The steel truss support system is laid out as follows:

[0051] Floor deck 2 is laid above two adjacent sets of anti-slip bearings, and corresponding supports 21 and longitudinal bearing bars 22 are installed on the floor deck 2 to form a steel truss system.

[0052] A transverse steel reinforcement cage 4 is laid and welded inside the anti-slip support;

[0053] The steel truss system and the transverse steel cage 4 are connected and welded together by stirrups to form an integral load-bearing system consisting of the steel truss system, the transverse steel cage 4 and the anti-slip support.

[0054] A flexible connection structure is used between the steel truss system and the main steel frame structure to balance the load and improve the uniformity of the overall stress system.

[0055] The structural joint is constructed as follows: the width of the segmented structural joint is 20mm, a water-swellable sealing strip is embedded in the joint, and a water-blocking structure is set above the sealing strip to achieve waterproofing and stress release.

[0056] The water-blocking structure is a metal water-blocking plate or a concrete water-blocking sill set above the water-stop strip. In this embodiment, a metal water-blocking plate is preferred to prevent rainwater from seeping into the interior of the structure along the structural joints.

[0057] In this invention, during use, the roof is first divided into high-slope and low-slope areas based on the actual slope data. The roof is then further divided into multiple independent floor slab units along the slope direction. A segmented structural joint, 20mm wide, is installed between adjacent sets of independent floor slab units. A water-swellable sealing strip is embedded within the joint, and a water-blocking structure is installed above the sealing strip to achieve waterproofing and stress release. Next, an anti-slip support is installed between each independent floor slab unit and the main steel frame structure. The anti-slip support is bolted and welded to the main steel frame structure for rigid connection. The system is fixed in place; then, floor decking 2 is laid above the two adjacent sets of anti-slip supports, and corresponding supports 21 and longitudinal bearing bars 22 are installed on the floor decking 2 to form a steel truss system. A transverse steel cage 4 is laid and welded and fixed inside the anti-slip support. The steel truss system and the transverse steel cage 4 are connected and welded together by stirrups, thus forming an overall load-bearing system composed of the steel truss system, the transverse steel cage 4 and the anti-slip support. The steel truss system and the main steel frame structure adopt a flexible connection structure to balance the load and improve the uniformity of the load on the overall load-bearing system.

[0058] In this invention, by setting anti-slip supports between the main steel frame structure and the floor slab 2, and introducing a flexible connection structure between the anti-slip supports and the main structure, and by setting segmented structural joints every 3m along the slope to divide the floor slab into independent units, the cracking problem is effectively solved while greatly reducing the lateral stiffness of the structure. The load on the roof layer is first transferred from the roof slab to the steel truss system (support 21 and longitudinal bearing reinforcement 22), then transferred to the flexible connection structure through the transverse steel cage 4 and the anti-slip supports, and finally evenly diffused to the main steel frame structure by the limiting column 5 and the transverse bearing reinforcement 51. This solves the problems of excessive stiffness concentration and shape conflict, precisely weakens the stiffness of the roof layer, avoids overall stiffness imbalance, and improves the crack resistance of the entire roof structure.

[0059] Components not described in detail in this article are existing technologies.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-slope roof anti-slip support based on a steel truss floor deck, comprising an I-beam (1) and a floor deck (2), wherein the I-beam (1) is fixedly connected within the steel frame main structure of the sloping roof, characterized in that, Also includes: Support plate (3), the support plate (3) is fixedly connected to the top of the I-beam (1), and the floor deck (2) is laid flat on the top of the support plate (3); A transverse steel cage (4) is welded and fixed inside a support plate (3). The transverse steel cage (4) is used to limit and fix the floor deck (2) laid on the support plate (3). A flexible connection structure is provided between the floor deck (2) and the main steel frame structure to balance the load on the floor deck (2) and the main steel frame structure. The top of the floor deck (2) is equipped with multiple sets of supports (21) along the slope direction. Multiple longitudinal bearing bars (22) distributed along the slope direction are inserted between the multiple sets of supports (21) in the same longitudinal direction. The multiple longitudinal bearing bars (22), the multiple sets of supports (21) and the floor deck (2) together form a steel truss system. The flexible connection structure includes a limiting column (5), which is fixedly connected to the main steel frame structure. Multiple sets of the limiting columns (5) are distributed along the slope direction of the main steel frame structure. A transverse bearing reinforcement (51) is installed between the limiting columns (5) located on both sides of the floor slab (2) and aligned with each other. The transverse bearing reinforcement (51) is perpendicular to the longitudinal bearing reinforcement (22) and passes perpendicularly through the steel truss system, and cooperates with the steel truss system to form a steel support system.

2. A construction method for a steeply sloping roof based on a reinforced truss floor slab, employing the anti-slip support for a steeply sloping roof based on a reinforced truss floor slab as described in claim 1, characterized in that... Includes the following steps: Step 1: Slope identification and unit division; Step 2: Arrangement of anti-slip bearings; Step 3: Laying the steel truss support system; Step 4: Construction of structural joints; Step 5: Segmented assembly line operation and concrete pouring.

3. The construction method for a high-slope pitched roof based on a reinforced truss floor slab according to claim 2, characterized in that, The slope identification and unit division are as follows: Based on the actual slope data of the roof, the roof is divided into high slope area and low slope area, and the roof is divided into multiple independent floor slab units along the slope direction, with a segmented structural joint set between two adjacent sets of independent floor slab units.

4. The construction method for a high-slope roof based on a reinforced truss floor slab according to claim 2, characterized in that, The anti-slip bearings are arranged as follows: Anti-slip supports are installed between each independent floor slab unit and the main steel frame structure, and the anti-slip supports are rigidly fixed to the main steel frame structure by bolts and welding.

5. A method for constructing a high-slope roof based on a reinforced truss floor slab according to claim 2, characterized in that, The steel truss support system is laid out as follows: Floor decking (2) is laid above two adjacent sets of anti-slip bearings, and corresponding supports (21) and longitudinal bearing bars (22) are installed on the floor decking (2) to form a steel truss system; A transverse steel cage (4) is laid and welded inside the anti-slip support. The steel truss system is connected to the transverse steel cage (4) by stirrups and welded together.

6. The construction method for a high-slope pitched roof based on a reinforced truss floor slab according to claim 5, characterized in that, A flexible connection structure is used between the steel truss system and the main steel frame structure.

7. A method for constructing a high-slope roof based on a reinforced truss floor slab according to claim 3, characterized in that, The structural seam is constructed as follows: The joint width of the segmented structure is 20mm. A water-swellable sealing strip is embedded in the joint, and a water-blocking structure is set above the sealing strip.

8. A method for constructing a high-slope roof based on a reinforced truss floor slab according to claim 7, characterized in that, The water-blocking structure is a metal water-blocking plate or a concrete water-blocking sill installed above the water-stop strip.

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