Glulam frame support-steel frame hybrid lateral force resisting system and its construction method

Abstract

The present invention relates to the field of construction engineering, and in particular to a glulam frame support-steel frame hybrid lateral force resistance system, comprising a fire-resistant coated steel frame, glulam frame units, steel truss floor decking and wooden floor slabs. The steel frame is located in the middle of the entire system and divides the glulam frame units into multiple independent parts. The glulam frame units of each part are horizontally fixedly connected by the steel frame. The steel truss floor decking is laid in each layer of steel frame, and the wooden floor slabs are densely laid in each layer of glulam frame units. Compared with the prior art, the present invention horizontally mixes steel frame and glulam frame units to form a lateral force resistance system. The steel frame located in the middle of the structure significantly improves the rigidity of the structure and acts as a fire isolation zone, greatly increasing the fire safety of the wooden structure and making the wooden structure more suitable for multi-story buildings.

Description

Technical Field

[0001] The present invention relates to the field of construction engineering, and in particular to a glued wood frame support-steel frame hybrid lateral force resistance system. Background Art

[0002] Wood structures offer advantages such as resource recycling, environmental friendliness, thermal insulation, lightweight aesthetics, and factory-based production and on-site assembly, making them suitable for prefabricated construction. The scientific and rational application of wood structures maximizes the value of wood as a renewable resource and is crucial for achieving global carbon peak and carbon neutrality, as well as net-zero carbon emissions.

[0003] Currently, a number of representative modern timber-framed buildings have been completed in China, but most are multi-story, one- to three-story structures or feature large-span timber roofs. Due to my country's large population, there is an urgent need to adopt timber structures in taller buildings, which is also a major development direction for the future. However, the application of timber structures in high-rise buildings presents many challenges, notably its lateral and fire resistance. In particular, timber structural components are inherently flammable. Once a fire occurs, it can spread rapidly, often eliminating escape routes within a short period of time. The fire can even spread to surrounding buildings, causing a chain reaction. Meanwhile, steel structures offer high strength, excellent seismic resistance, and are factory-produced and assembled on-site, making them suitable for hybrid structures with timber. Furthermore, mature fireproofing technology for steel structures allows steel frame beams and columns to withstand fires for 2-3 hours after application of fire-retardant coating, far exceeding the 1-hour fire resistance of timber beams and columns.

[0004] Therefore, based on the market demand for the application of wooden structures in multi-story buildings, in order to overcome the problems of weak lateral resistance and fire resistance of wooden structures, combined with the characteristics and advantages of steel structures, the present invention proposes a glued timber frame support-steel frame hybrid lateral force resistance system. Summary of the Invention

[0005] To address the weak lateral and fire resistance of timber structures, this paper proposes a hybrid lateral force-resistance system combining a glulam frame support and a steel frame. This system not only improves structural rigidity and lateral resistance, but also allows the steel and glulam frame units to synergistically withstand loads. Furthermore, the steel frame separates the glulam frame units into multiple independent sections, with the steel structure acting as a fire barrier between the timber sections. This prevents widespread spread of fire in timber structures, provides space and time for fire evacuation in multi-story timber structures, and significantly enhances the fire safety of timber structures, making them more suitable for multi-story buildings.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A glulam frame support-steel frame hybrid lateral force resisting system is provided, comprising a fire-retardantly coated steel frame, glulam frame units, steel truss floor decking and wooden floor slabs. The steel frame is located in the middle of the entire system and divides the glulam frame units into multiple independent parts. The glulam frame units of each part are horizontally fixedly connected by the steel frame. The steel truss floor decking is laid in each layer of the steel frame, and the wooden floor slabs are densely laid in each layer of the glulam frame units.

[0008] In a preferred embodiment provided by the present invention, the steel frame is arranged in a plane in any one of the shapes of a straight line, a cross, a swastika, a Feng, and a well, according to the building shape and fire protection zoning requirements.

[0009] In a preferred embodiment provided by the present invention, the support form of the glued wood frame unit is any one of single diagonal rod support, herringbone support, V-shaped support, or a combination thereof.

[0010] In a preferred embodiment provided by the present invention, the glulam frame unit is connected to the steel frame through a connecting component 1, and the connecting component 1 includes an integrated steel insert plate and bolts. One end of the steel insert plate is welded and fixed to the steel column of the steel frame, and the other end is inserted into the reserved groove of the glulam beam and the glulam support end of the glulam frame unit and fixed by bolts.

[0011] In a preferred embodiment provided by the present invention, the wooden floor is connected to the steel truss floor slab through a second connection component, and the second connection component includes an edge sealing grille, anchor bolts, bolts and a floor slab connector. The edge sealing grille is fixedly connected to the steel truss floor slab and the steel beam of the steel frame through anchor bolts and bolts respectively, and the wooden floor is laid on the installation area surrounded by the edge sealing grille through the floor slab connector.

[0012] In a preferred embodiment provided by the present invention, the wooden floor is a wooden grid floor and / or a CLT floor.

[0013] In a preferred embodiment provided by the present invention, the floor connecting member includes a U-shaped connecting member and an L-shaped connecting member, the wooden grille floor is fixedly connected to the edge grille by the U-shaped connecting member and screws, and the CLT floor is fixedly connected to the edge grille by the L-shaped connecting member and screws.

[0014] In a preferred embodiment provided by the present invention, corner braces are further provided between two adjacent steel beams of the steel frame, between two adjacent glulam beams of the glulam frame unit, and between a glulam beam and its adjacent steel beam.

[0015] In a preferred embodiment provided by the present invention, the corner brace is connected to the vertical stiffening rib offset by 45 degrees and arranged on the side of the steel beam by bolts, and is connected to the "ト"-shaped connector arranged on the side of the glued laminated timber beam by bolts.

[0016] The present invention further provides a construction method of the glulam frame support-steel frame hybrid lateral force resisting system in any of the above-mentioned embodiments, comprising the following steps:

[0017] Step 1: Complete the site’s foundation and infrastructure construction;

[0018] Step 2: Build the middle steel frame, and reserve a steel plug plate for connecting component 1 on the steel column where the steel frame connects to the glued wood frame unit;

[0019] Step 3: Install the corner braces in the steel frame in a timely manner;

[0020] Step 4: Lay the steel truss floor decking in the steel frame layer by layer, and embed anchor bolts of the connection component 2 for connecting with the wooden floor slabs on the steel truss floor decking;

[0021] Step 5: Complete the construction of the glulam frame units separated by the steel frame symmetrically layer by layer, and use the connection component 1 to fix the horizontal connection with the steel frame for each layer;

[0022] Step 6: Install the corner braces in the glulam frame units promptly;

[0023] Step 7: Lay the wooden floor slabs in the glued timber frame unit layer by layer, and connect the wooden floor slabs to the steel truss floor decking via the second connection component.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] (1) The present invention combines steel frame and glulam frame units horizontally, and the two are synergistically stressed. Compared with multi-story pure wood structures, the structural rigidity is significantly improved, and the lateral resistance performance is significantly enhanced;

[0026] (2) After simple fireproof coating, the fire resistance limit of steel frame is much higher than that of wood structure. The use of steel frame to separate the glulam frame unit into multiple independent parts can prevent the large-scale spread of fire in wood structure, provide space and time for fire evacuation of multi-story wood structure, and greatly increase the fire safety of wood structure;

[0027] (3) The present invention uses a large number of glued wood components and steel structure components, which are factory-produced and assembled on-site. The construction speed is fast and the quality of the components is easy to ensure, thereby improving the quality of the project;

[0028] (4) Wood is renewable and steel is reusable, so the present invention complies with the national sustainable development strategy and is low-carbon, green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0030] Figure 1 A schematic structural diagram of the glulam frame support-steel frame hybrid lateral force resisting system provided by the present invention;

[0031] Figure 2 for Figure 1 A typical side view of the structural system provided;

[0032] Figures 3 to 7 Schematic diagram of the planar layout of five different structures a, b, c, d, and e of the glued-laminated timber frame support-steel frame hybrid lateral force resisting system provided by the present invention;

[0033] Figure 8 A schematic diagram of the connection between the glulam frame unit and the steel frame provided by the present invention;

[0034] Figure 9 A schematic diagram of the connection between the wooden grille floor and the steel truss floor deck provided by the present invention;

[0035] Figure 10 A schematic diagram of the connection between the CLT floor slab and the steel truss floor slab provided by the present invention;

[0036] Figure 11 This is a schematic diagram of the corner brace connection provided by the present invention.

[0037] In the figure: 1. Steel frame, 2. Glulam frame unit, 3. Steel truss floor deck, 4. Wood floor, 5. Corner brace, 11. Steel column, 12. Steel beam, 21. Glulam beam, 22. Glulam support, 41. Wood grille floor, 42. CLT floor, 101. Steel insert, 102. Bolt, 103. Edge grille, 104. Anchor bolt, 105. U-shaped connector, 106. L-shaped connector, 107. Vertical stiffener, 108. "To"-shaped connector. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1

[0040] The present invention provides a glued wood frame support-steel frame hybrid lateral force resistance system, which combines a fire-resistant painted steel frame with a glued wood frame unit. The completed structural system is as shown in the attached figure. Figure 1 Its typical side view is shown in the attached Figure 2 shown.

[0041] like Figure 1 、 Figure 2 As shown, the system is a multi-story structure, which is arranged on a foundation and includes a fire-retardant coated steel frame 1, a glued timber frame unit 2, a steel truss floor slab 3 and a wooden floor slab 4. The steel frame 1 is located in the middle of the entire system and divides the glued timber frame unit 2 into multiple independent parts. The glued timber frame units 2 of each part are horizontally fixedly connected by the steel frame 1, so that the steel frame 1 and the glued timber frame units 2 of each part are synergistically stressed in the horizontal direction. The steel truss floor slab 3 is laid in the steel frame 1 of each layer, and the wooden floor slab 4 is densely laid in the glued timber frame unit of each layer.

[0042] Preferably, the fireproof painted steel frame 1 in this embodiment is arranged in a cross shape, as shown in the attached Figure 1 and attached Figure 4 As shown in FIG. 1 , the steel frame divides the glued wood frame unit 2 into four parts. In other embodiments, according to the building shape and fire protection zone requirements, the plane layout of the steel frame 1 can be arranged in a cross shape in addition to the cross shape used in this embodiment, as shown in FIG. Figure 3 The one-line type shown in the attached Figure 5 The swastika shown in the attached Figure 6 The Feng character shown in the attached Figure 7 The cross-shaped structure shown. In the above arrangement, the steel frame 1 and the glued timber frame unit 2 are horizontally connected together to bear the force together. Preferably, the support form of the glued timber frame unit 2 of this embodiment can be any one of a single diagonal rod support, a herringbone support, a V-shaped support, or a combination thereof. The lateral resistance of the hybrid structure adopted in this embodiment is significantly enhanced, and the steel structure with fire-retardant coating acts as a fire isolation zone between the various parts of the wooden structure, which can prevent the wooden structure from spreading over a large area in the event of a fire, provide space and time for fire evacuation for multi-story wooden structures, and greatly increase the fire safety of the wooden structure.

[0043] Preferably, as attached Figure 8As shown, the glued timber frame unit 2 of this embodiment is connected to the steel frame 1 through a connecting component 1, and the connecting component 1 includes an integrated steel insert plate 101 and a bolt 102. One end of the steel insert plate 101 is welded and fixed to the steel column 11 of the steel frame 1, and the other end is inserted into the reserved grooves at the ends of the glued timber beam 21 and the glued timber support 22 of the glued timber frame unit 2, and fixed by the bolt 102.

[0044] Preferably, as attached Figure 9 and attached Figure 10 As shown, the second connection component of the wooden floor 4 of this embodiment is connected to the steel truss floor slab 3, and the second connection component includes an edge grille 103, an anchor bolt 104, a bolt 102 and a floor connector. The edge grille 103 is fixedly connected to the steel truss floor 3 and the steel beam 12 of the steel frame 1 through the anchor bolt 104 and the bolt 102 respectively, and the wooden floor 4 is laid on the installation area surrounded by the edge grille (103) through the floor connector. Preferably, the wooden floor 4 of this embodiment adopts a wooden grille floor slab 41 and / or a CLT floor slab 42. Specifically, the wooden grille floor slab 41 is connected to the steel truss floor slab 3, as shown in the attached figure. Figure 9 As shown, the wooden grille floor 41 is fixedly connected to the edge grille 103 by floor connectors and screws. At this time, the floor connectors are U-shaped connectors 105; the CLT floor 42 is connected to the steel truss floor deck 3, as shown in the attached figure. Figure 10 As shown, the CLT floor 42 is fixedly connected to the edge grid 103 through floor connectors and screws. In this case, the floor connectors are L-shaped connectors 106 .

[0045] Example 2

[0046] Based on the first embodiment, as shown in the attached Figure 1 and attached Figure 11 As shown, in this embodiment, corner braces 5 are provided between adjacent steel beams 12 of the steel frame 1, between adjacent glulam beams 21 of the glulam frame unit 2, and between the glulam beams 21 and their adjacent steel beams 12. In this embodiment, corner braces 5 are provided within the plane of the hybrid floor composed of the steel truss deck 3 and the wooden floor slab 4 to enhance the integrity of the system. Specifically, as shown in the attached figure, Figure 11 As shown, the corner brace 5 is connected to a vertical stiffening rib 107 offset by 45 degrees and arranged on the side of the steel beam 12 by bolts 102, and is connected to a "T"-shaped connector 108 arranged on the side of the glued laminated timber beam 21 by bolts 102.

[0047] Example 3

[0048] Based on the first or second embodiment, this embodiment provides a construction method of a glued-laminated timber frame support-steel frame hybrid lateral force resisting system, comprising the following steps:

[0049] Step 1: Complete the site’s foundation and infrastructure construction;

[0050] Step 2: Build the middle steel frame 1, and reserve a steel plug plate 101 of the connection component 1 on the steel column 11 at the connection between the steel frame 1 and the glued wood frame unit 2;

[0051] Step 3: Install the corner brace 5 in the steel frame 1 in a timely manner;

[0052] Step 4: Lay the steel truss floor deck 3 in the steel frame 1 layer by layer, and embed the anchor bolts 104 of the second connection assembly for connecting with the wooden floor slab 4 in the steel truss floor deck 3;

[0053] Step 5: Complete the construction of the glulam frame units 2 separated by the steel frame 1 symmetrically layer by layer, and use the connection component 1 to horizontally fix the connection to the steel frame 1 for each layer;

[0054] Step 6: Install the corner brace 5 in the glulam frame unit 2 in a timely manner;

[0055] Step 7: Lay the wooden floor slabs 4 in the glued timber frame unit 2 layer by layer. The wooden floor slabs 4 are connected to the steel truss floor deck 3 via the second connection assembly.

[0056] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A glued-laminated timber frame support-steel frame hybrid lateral force resisting system, characterized in that: The system comprises a fireproof coated steel frame (1), a glulam frame unit (2), a steel truss floor slab (3) and a wooden floor slab (4), wherein the steel frame (1) is located in the middle of the entire system and divides the glulam frame unit (2) into a plurality of independent parts, wherein the glulam frame units (2) of each part are horizontally fixedly connected by the steel frame (1), the steel truss floor slab (3) is laid in each layer of the steel frame (1), and the wooden floor slab (4) is densely laid in each layer of the glulam frame unit; The wooden floor (4) is connected to the steel truss floor slab (3) via a second connection assembly, wherein the second connection assembly comprises an edge sealing grid (103), anchor bolts (104), bolts (102) and a floor slab connector. The edge sealing grid (103) is fixedly connected to the steel truss floor (3) and the steel beam (12) of the steel frame (1) via the anchor bolts (104) and the bolts (102), respectively. The wooden floor (4) is laid on the installation area surrounded by the edge sealing grid (103) via the floor slab connector.

2. The glulam frame support-steel frame hybrid lateral force resisting system according to claim 1 is characterized in that: The steel frame (1) is arranged in a plane in any one of the following shapes: a straight line, a cross, a swastika, a Feng-shaped shape, and a well-shaped shape according to the building shape and fire protection zoning requirements.

3. The glulam frame support-steel frame hybrid lateral force resisting system according to claim 1 is characterized in that: The support form of the glued wood frame unit (2) is any one of single diagonal rod support, herringbone support, and V-shaped support, or a combination thereof.

4. The glulam frame support-steel frame hybrid lateral force resisting system according to claim 1 is characterized in that: The glulam frame unit (2) is connected to the steel frame (1) via a connecting assembly (1), wherein the connecting assembly (1) comprises an integrated steel insert plate (101) and a bolt (102), wherein one end of the steel insert plate (101) is welded and fixed to a steel column (11) of the steel frame (1), and the other end is inserted into a reserved groove at the end of the glulam beam (21) and the glulam support (22) of the glulam frame unit (2) and fixed via the bolt (102).

5. The glulam frame support-steel frame hybrid lateral force resisting system according to claim 1 is characterized in that: The wooden floor (4) is a wooden grid floor (41) or / and a CLT floor (42).

6. The glulam frame support-steel frame hybrid lateral force resisting system according to claim 5 is characterized in that: The floor slab connector comprises a U-shaped connector (105) and an L-shaped connector (106); the wood grille floor slab (41) is fixedly connected to the edge grille (103) via the U-shaped connector (105) and screws; and the CLT floor slab (42) is fixedly connected to the edge grille (103) via the L-shaped connector (106) and screws.

7. The glulam frame support-steel frame hybrid lateral force resisting system according to any one of claims 1 to 6, characterized in that: Corner braces (5) are further provided between two adjacent steel beams (12) of the steel frame (1), between two adjacent glulam beams (21) of the glulam frame unit (2), and between a glulam beam (21) and its adjacent steel beam (12).

8. The glulam frame support-steel frame hybrid lateral force resisting system according to claim 7 is characterized in that: The corner brace (5) is connected to a vertical stiffening rib (107) offset by 45 degrees and arranged on the side of the steel beam (12) by means of bolts (102), and is also connected to a "ト"-shaped connector (108) arranged on the side of the glued laminated timber beam (21) by means of bolts (102).

9. A construction method of a glued-laminated timber frame support-steel frame hybrid lateral force resisting system as claimed in claim 8, characterized in that: The following steps are involved: Step 1: Complete the site’s foundation and infrastructure construction; Step 2: constructing the middle steel frame (1), and reserving a steel plug plate (101) of the connection component 1 on the steel column (11) at the connection between the steel frame (1) and the glued wood frame unit (2); Step 3: Install the corner brace (5) in the steel frame (1) in a timely manner; Step 4: Laying the steel truss floor deck (3) in the steel frame (1) layer by layer, with anchor bolts (104) of the second connection component pre-embedded on the steel truss floor deck (3) for connection with the wooden floor slab (4); Step 5: Complete the construction of the glulam frame units (2) separated by the steel frame (1) symmetrically layer by layer, and use a connecting component 1 to horizontally fix the connection with the steel frame (1) for each layer; Step 6: Install the corner braces (5) in the glulam frame unit (2) in a timely manner; Step 7: Laying of the wooden floor slabs (4) in the glued timber frame unit (2) is completed layer by layer, and the wooden floor slabs (4) are connected to the steel truss floor slabs (3) via the second connection component.

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