An assembled staggered column light steel truss structure and construction method

Abstract

The present invention discloses an assembled staggered column light steel truss structure and a construction method. The steel truss structure includes a load-bearing structure and a non-load-bearing structure, wherein the corner columns arranged at the corners of the structure body are continuous integral columns, the load-bearing structure is arranged in the form of interlayer disconnection, each layer in the load-bearing structure adopts the form of one column and one beam, the top of each load-bearing column in the load-bearing structure is equipped with a crossbeam, and the non-load-bearing columns in the non-load-bearing structure are arranged in a staggered form. The construction method is as follows: step 1, pre-embed bolts on the foundation of the steel truss structure part; step 2, arrange the load-bearing columns at the load-bearing part according to the set spacing; step 3, set the node connection mechanism in the non-load-bearing structure. Beneficial effects: strong stability, high toughness, good seismic performance, greatly simplifying the construction and speeding up the construction speed.

Description

Technical Field

[0001] The invention relates to a truss structure and a construction method, and in particular to an assembled staggered column row light steel truss structure and a construction method. Background Art

[0002] At present, in order to meet the requirements of areas with higher seismic fortification intensity, the research on low-rise cold-bent thin-walled steel structures is reflected in the staggered arrangement between adjacent columns. The main components that bear vertical loads are disconnected between layers. Ordinary bolt connections will produce slippage and the horizontal bearing capacity is difficult to meet the requirements. The general low-rise cold-bent thin-walled steel structure uses C-shaped steel in the cross-section of the corner column, which is not enough to meet the requirements in areas with higher seismic fortification intensity.

[0003] Cold-bent thin-walled steel is the main material of the light steel structure system. It has the advantages of high strength and good toughness, but its cost is relatively high and its construction and installation are relatively cumbersome. For existing welding connections or sleeve grouting connections, its cost is high and the construction speed is slow.

[0004] In summary, how to strengthen the node connections of staggered column rows, design the structural form of corner columns and simplify the construction method of low-rise cold-bent thin-walled steel structure systems are issues that urgently need to be solved by technical personnel in this field. Summary of the invention

[0005] The purpose of the present invention is to strengthen the node connection of staggered columns, design the corner column structure and simplify the construction method of low-rise cold-bent thin-walled steel structure system, and to provide an assembled staggered column light steel truss structure and construction method.

[0006] The assembled staggered column row light steel truss structure provided by the present invention includes a load-bearing structure and a non-load-bearing structure, wherein the corner columns arranged at the corners of the structure body are continuous one-piece columns, the load-bearing structure is arranged in the form of interlayer disconnection, each layer in the load-bearing structure adopts the form of one column and one beam, and the top of each load-bearing column in the load-bearing structure is equipped with a cross beam, and the non-load-bearing columns in the non-load-bearing structure are arranged in a staggered form, with short non-load-bearing columns connected above the long non-load-bearing columns, and long non-load-bearing columns are connected above the short non-load-bearing columns in adjacent column rows, and the non-load-bearing columns in adjacent rows are arranged as staggered column rows.

[0007] The corner columns are three-piece cold-bent thin-walled one-piece steel columns.

[0008] The bottoms of the lowest load-bearing columns and non-load-bearing columns of the load-bearing structure and the non-load-bearing structure and the bottoms of the corner columns are all fixedly connected to the bottom rails. The bottom rails are U-shaped and are fixed to the foundation by bolts and nuts.

[0009] Interlayer guide rails are installed between the load-bearing columns and beams of each layer in the load-bearing structure, and tie rods are installed between the interlayer guide rails at the top and bottom of the beam for connection.

[0010] Several rows of continuous trusses are evenly distributed between several rows of load-bearing columns in the load-bearing structure at set intervals, and each of the continuous trusses is composed of several short trusses.

[0011] The non-load-bearing structure is equipped with several rows of continuous trusses at set intervals. Each row of continuous trusses is composed of several short trusses. The non-load-bearing columns in the non-load-bearing structure are installed between adjacent rows of trusses. Several layers of prefabricated fences are sandwiched between the remaining adjacent trusses, and windows are reserved between the upper and lower layers of prefabricated fences.

[0012] The nodes between the long non-load-bearing columns and the short non-load-bearing columns in the non-load-bearing structure are connected by a connecting mechanism, which includes a sleeve, a reinforced C-shaped steel and a prestressed steel bar, wherein the reinforced C-shaped steel is fixedly connected at the intersection of the long non-load-bearing column and the short non-load-bearing column by self-tapping screws, the sleeve is sleeved around the reinforced C-shaped steel, the prestressed steel bar is wrapped around the sleeve, cement concrete is poured in the sleeve, and the prestressed steel bar is tensioned and anchored after the cement concrete in the sleeve reaches the set strength, and cover plates are provided at both ends of the sleeve for sealing after the cement concrete in the sleeve reaches the set strength.

[0013] The construction method of the assembled staggered column light steel truss structure provided by the present invention comprises the following steps:

[0014] Step 1: Embed bolts on the foundation of the steel truss structure where it is needed, drill holes at the corresponding positions of the U-shaped bottom rail, and fix it to the foundation with nuts; install corner columns at the ends of the bottom rails, the corner columns are in the form of three-piece cold-bent thin-walled steel columns, and install non-load-bearing columns of staggered columns on the bottom rails of non-load-bearing parts. The staggered columns are short non-load-bearing columns and long non-load-bearing columns from left to right, and a set spacing is reserved. Prefabricated trusses are installed at both ends along the height direction between the set spacings, and several layers of prefabricated fences are installed along the height direction between two adjacent rows of trusses, and windows are reserved between the upper and lower adjacent layers of prefabricated fences;

[0015] Step 2: Arrange the load-bearing columns at the load-bearing parts according to the set spacing, reserve the set spacing between several rows of load-bearing columns, and then install the assembled trusses between the set spacings. Install the interlayer guide rails with downward openings above the load-bearing columns to connect with the load-bearing columns. Then, stand the crossbeams on their sides on the interlayer guide rails. The arrangement of the crossbeams is consistent with that of the columns, forming a one-column-one-beam type. Tie rods are inserted between the two interlayer guide rails at the top and bottom of the crossbeams for connection. Place the interlayer guide rails with upward openings above the crossbeams to fix the load-bearing columns on the upper layer of the crossbeams. Repeat this process to assemble several layers of cold-bent thin-walled steel structure systems.

[0016] Step three, setting up a node connection mechanism between the long non-load-bearing column and the short non-load-bearing column in the non-load-bearing structure, the connection mechanism includes a sleeve, a reinforced C-shaped steel and a prestressed steel bar, wherein the reinforced C-shaped steel is fixed at the intersection of the long non-load-bearing column and the short non-load-bearing column by self-tapping screws, the sleeve is sleeved around the reinforced C-shaped steel, the prestressed steel bar is wrapped around the sleeve, cement concrete is poured in the sleeve, and the prestressed steel bar is tensioned and anchored after the cement concrete in the sleeve reaches the set strength, and the two ends of the sleeve are covered with cover plates for sealing after the cement concrete in the sleeve reaches the set strength.

[0017] Beneficial effects of the present invention:

[0018] The assembled staggered column light steel truss structure and construction method provided by the present invention have strong stability, high toughness and good earthquake resistance. The installation of assembled trusses and assembled fences greatly simplifies the construction and speeds up the construction. It also ensures the integrity of the structural system. The staggered column arrangement has a stress performance that is not much different from that of continuous columns, but greatly facilitates transportation and reduces the material transportation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the overall structure of the staggered column row light steel truss structure described in the present invention.

[0020] Figure 2 Schematic diagram of the load-bearing structure described in the present invention.

[0021] Figure 3 Schematic diagram of the non-load-bearing structure of the present invention.

[0022] Figure 4 Schematic diagram of the interlayer connection of the load-bearing structure according to the present invention.

[0023] Figure 5 Schematic diagram of the short truss structure of the present invention.

[0024] Figure 6 A schematic diagram of the assembled fence structure of the present invention.

[0025] Figure 7 A schematic diagram of the connection structure between the foundation and the bottom rail according to the present invention.

[0026] Figure 8 A schematic diagram of the connection of the intersection node of the long non-load-bearing column and the short non-load-bearing column described in the present invention.

[0027] Fig. 9 Schematic diagram of the connection structure between the long non-load-bearing column and the short non-load-bearing column according to the present invention.

[0028] Fig.10 A schematic cross-sectional view of a node where a long non-load-bearing column and a short non-load-bearing column according to the present invention intersect.

[0029] The annotations in the above figure are as follows:

[0030] 1. Corner column 2. Load-bearing column 3. Crossbeam 4. Non-load-bearing column 5. Bottom rail

[0031] 6. Interlayer guide rails 7. Tie rods 8. Trusses 9. Short trusses 10. Assembled fences

[0032] 11. Window 12. Sleeve 13. Reinforced C-shaped steel 14. Prestressed steel bar

[0033] 15. Cover plate. DETAILED DESCRIPTION

[0034] See also Figures 1 to 10 As shown:

[0035] The assembled staggered column row light steel truss structure provided by the present invention includes a load-bearing structure and a non-load-bearing structure, wherein the corner column 1 arranged at the corner of the structure body is a continuous one-piece column, the load-bearing structure is arranged in the form of interlayer disconnection, each layer in the load-bearing structure adopts the form of one column and one beam, and the top of each load-bearing column 2 in the load-bearing structure is equipped with a cross beam 3, and the non-load-bearing columns 4 in the non-load-bearing structure are arranged in a staggered form, and short non-load-bearing columns 4 are connected above the long non-load-bearing columns 4, and long non-load-bearing columns 4 are connected above the short non-load-bearing columns 4 in adjacent column rows, and the non-load-bearing columns 4 in adjacent rows are arranged as staggered column rows.

[0036] The corner column 1 is a three-piece cold-bent thin-walled one-piece steel column.

[0037] The bottoms of the lowest load-bearing columns 2 and non-load-bearing columns 4 of the load-bearing structure and the non-load-bearing structure and the bottom of the corner column 1 are all fixedly connected to the bottom rail 5. The bottom rail 5 is U-shaped and is fixed to the foundation by bolts and nuts.

[0038] An interlayer guide rail 6 is installed between the load-bearing columns 2 and the cross beams 3 of each layer in the load-bearing structure, and a tie rod 7 is installed between the interlayer guide rails 6 at the top and bottom of the cross beam 3 for connection.

[0039] Several rows of continuous trusses 8 are evenly distributed between several rows of load-bearing columns 2 in the load-bearing structure at set intervals, and each of the continuous trusses 8 is composed of several short trusses 9.

[0040] The non-load-bearing structure is equipped with several rows of continuous trusses 8 at set intervals. Each row of continuous trusses 8 is composed of several short trusses 9. The non-load-bearing columns 4 in the non-load-bearing structure are installed between adjacent rows of trusses 8. Several layers of prefabricated fences 10 are sandwiched between the remaining adjacent trusses 8, and windows 11 are reserved between the upper and lower layers of prefabricated fences 10.

[0041] The node between the long non-load-bearing column 4 and the short non-load-bearing column 4 in the non-load-bearing structure is connected by a connecting mechanism, which includes a sleeve 12, a reinforced C-shaped steel 13 and a prestressed steel bar 14, wherein the reinforced C-shaped steel 13 is fixedly connected at the intersection of the long non-load-bearing column 4 and the short non-load-bearing column 4 by self-tapping screws, the sleeve 12 is sleeved around the reinforcing C-shaped steel 13, the prestressed steel bar 14 is wrapped around the sleeve 12, and cement concrete is poured in the sleeve 12. After the cement concrete in the sleeve 12 reaches the set strength, the prestressed steel bar 14 is tensioned and anchored. After the cement concrete in the sleeve 12 reaches the set strength, cover plates 15 are provided at both ends of the sleeve 12 for sealing.

[0042] The construction method of the assembled staggered column light steel truss structure provided by the present invention comprises the following steps:

[0043] Step 1: embed bolts on the foundation of the steel truss structure, drill holes at the corresponding positions of the U-shaped bottom rail 5, and fix it to the foundation with nuts; install corner columns 1 at the ends of the bottom rail 5, the corner columns 1 are in the form of three cold-bent thin-walled steel columns, and install non-load-bearing columns 4 of staggered columns on the bottom rail 5 of the non-load-bearing part. The staggered columns are short non-load-bearing columns 4 and long non-load-bearing columns 4 from left to right, and a set spacing is reserved. Prefabricated trusses 8 are installed at both ends along the height direction between the set spacings, and several layers of prefabricated fences 10 are installed along the height direction between two adjacent rows of trusses 8, and windows 11 are reserved between the upper and lower adjacent layers of prefabricated fences 10;

[0044] Step 2: Arrange the load-bearing columns 2 at the load-bearing parts according to the set spacing, reserve the set spacing between the rows of load-bearing columns 2, and then install the assembled trusses 8 between the set spacings. Install the interlayer guide rails 6 with downward openings above the load-bearing columns 2 to connect with the load-bearing columns 2, and then stand the crossbeams 3 on their sides on the interlayer guide rails 6. The arrangement of the crossbeams 3 is consistent with that of the columns, forming a one-column-one-beam type, and pass the tie rods 7 between the two interlayer guide rails 6 at the top and bottom of the crossbeams 3 for connection. Place the interlayer guide rails 6 with upward openings above the crossbeams 3 to fix the load-bearing columns 2 on the upper layer of the crossbeams 3. Repeat this process to assemble several layers of cold-bent thin-walled steel structure systems.

[0045] Step three, setting up a node connection mechanism between the long non-load-bearing column 4 and the short non-load-bearing column 4 in the non-load-bearing structure, the connection mechanism includes a sleeve 12, a reinforced C-shaped steel 13 and a prestressed steel bar 14, wherein the reinforced C-shaped steel 13 is fixedly connected at the intersection of the long non-load-bearing column 4 and the short non-load-bearing column 4 by self-tapping screws, the sleeve 12 is sleeved around the reinforced C-shaped steel 13, the prestressed steel bar 14 is wrapped around the sleeve 12, cement concrete is poured in the sleeve 12, and the prestressed steel bar 14 is tensioned and anchored after the cement concrete in the sleeve 12 reaches the set strength, and the two ends of the sleeve 12 are covered with cover plates 15 for sealing.

Claims

1. An assembled staggered column light steel truss structure, including a load-bearing structure and a non-load-bearing structure, wherein the corner columns arranged at the corners of the structure body are continuous integral columns, the load-bearing structure is arranged in the form of interlayer disconnection, each layer in the load-bearing structure adopts the form of one column and one beam, and the top of each load-bearing column in the load-bearing structure is equipped with a crossbeam, the non-load-bearing columns in the non-load-bearing structure are arranged in a staggered form, short non-load-bearing columns are connected above the long non-load-bearing columns, and long non-load-bearing columns are connected above the short non-load-bearing columns in adjacent column rows, and the non-load-bearing columns of adjacent columns are arranged in staggered column rows, characterized in that: The bottom of the load-bearing column at the bottom of the load-bearing structure and the non-load-bearing structure and the bottom of the corner column are all fixedly connected to the bottom rail, the bottom rail is U-shaped, and the bottom rail is fixed to the foundation by bolts and nuts; the non-load-bearing structure is equipped with several rows of continuous trusses at set intervals, each row of continuous trusses is composed of several short trusses, the non-load-bearing columns in the non-load-bearing structure are installed between adjacent rows of trusses, and several layers of assembled fences are sandwiched between the remaining adjacent trusses, and windows are reserved between the upper and lower assembled fences; the non-load-bearing structure is long and narrow, and the non-load-bearing columns are arranged between the adjacent trusses. The node between the long non-load-bearing column and the short non-load-bearing column is connected by a connecting mechanism, which includes a sleeve, a reinforced C-shaped steel and a prestressed steel bar, wherein the reinforced C-shaped steel is fixedly connected at the intersection of the long non-load-bearing column and the short non-load-bearing column by self-tapping screws, the sleeve is sleeved around the reinforced C-shaped steel, the prestressed steel bar is wrapped around the sleeve, cement concrete is poured in the sleeve, and the prestressed steel bar is tensioned and anchored after the cement concrete in the sleeve reaches the set strength, and cover plates are provided at both ends of the sleeve for sealing.

2. The assembled staggered column light steel truss structure according to claim 1, characterized in that: The corner column is a three-piece cold-bent thin-walled one-piece steel column.

3. The assembled staggered column light steel truss structure according to claim 1 is characterized by: In the load-bearing structure, interlayer guide rails are installed between the load-bearing columns and the cross beams of each layer, and tie rods are installed between the interlayer guide rails at the top and bottom of the cross beams for connection.

4. The assembled staggered column light steel truss structure according to claim 1, characterized in that: In the load-bearing structure, several rows of continuous trusses are evenly distributed between several rows of load-bearing columns at set intervals, and each of the continuous trusses is composed of several short trusses.

5. The assembled staggered column light steel truss structure according to claim 1, characterized in that: The construction method of the assembled staggered column light steel truss structure includes the following steps: Step 1: Embed bolts on the foundation of the steel truss structure where it is needed, drill holes at the corresponding positions of the U-shaped bottom rail, and fix it to the foundation with nuts; install corner columns at the ends of the bottom rails, the corner columns are in the form of three-piece cold-bent thin-walled steel columns, and install non-load-bearing columns of staggered columns on the bottom rails of non-load-bearing parts. The staggered columns are short non-load-bearing columns and long non-load-bearing columns from left to right, and a set spacing is reserved. Prefabricated trusses are installed at both ends along the height direction between the set spacings, and several layers of prefabricated fences are installed along the height direction between two adjacent rows of trusses, and windows are reserved between the upper and lower adjacent layers of prefabricated fences; Step 2: Arrange the load-bearing columns at the load-bearing parts according to the set spacing, reserve the set spacing between several rows of load-bearing columns, and then install the assembled trusses between the set spacings. Install the interlayer guide rails with downward openings above the load-bearing columns to connect with the load-bearing columns. Then, stand the crossbeams on their sides on the interlayer guide rails. The arrangement of the crossbeams is consistent with that of the columns, forming a one-column-one-beam type. Tie rods are inserted between the two interlayer guide rails at the top and bottom of the crossbeams for connection. Place the interlayer guide rails with upward openings above the crossbeams to fix the load-bearing columns on the upper layer of the crossbeams. Repeat this process to assemble several layers of cold-bent thin-walled steel structure systems. Step three, setting up a node connection mechanism between the long non-load-bearing column and the short non-load-bearing column in the non-load-bearing structure, the connection mechanism includes a sleeve, a reinforced C-shaped steel and a prestressed steel bar, wherein the reinforced C-shaped steel is fixed at the intersection of the long non-load-bearing column and the short non-load-bearing column by self-tapping screws, the sleeve is sleeved around the reinforced C-shaped steel, the prestressed steel bar is wrapped around the sleeve, cement concrete is poured in the sleeve, and the prestressed steel bar is tensioned and anchored after the cement concrete in the sleeve reaches the set strength, and the two ends of the sleeve are covered with cover plates for sealing after the cement concrete in the sleeve reaches the set strength.

Images