An explosion-resistant hollow steel tube-concrete composite structural column and its auxiliary support system

Abstract

The present invention discloses an explosion-resistant hollow steel pipe-concrete composite structure column and its auxiliary support system, which relates to the technical field of hollow support structures; it includes: a hollow steel pipe, an energy-absorbing material layer is arranged on the outer side of the hollow steel pipe, and the energy-absorbing material layer adopts a circular-section foam aluminum structure; an octagonal steel reinforcement cage, the octagonal steel reinforcement cage includes second longitudinal steel bars and second stirrups, the second stirrups are fixed on the outer sides of the respective second longitudinal steel bars, and the octagonal steel reinforcement cage is located on the outer side of the energy-absorbing material layer. Through the characteristics of the large stiffness of the polyvinyl alcohol-basalt hybrid fiber cement-based composite material and the energy-absorbing characteristics of the circular-section foam aluminum, the composite material layer and the energy-absorbing material layer are in surface contact with each other, increasing the overall interaction between the two materials; if an explosion occurs, the structure can well absorb the energy of the explosion impact load, reduce the explosion damage, maximize the explosion-resistant performance of the composite structure column, and improve its bearing capacity.

Description

Technical Field

[0001] The invention relates to the technical field of hollow support structures, and in particular to an explosion-proof hollow steel tube-concrete composite structural column and an auxiliary support system thereof. Background Art

[0002] Steel-concrete composite structural columns have the characteristics of both steel structures and concrete structures, and are mostly used in high-rise and super-high-rise building structural columns; however, for built-in steel tube-concrete composite structural columns, since concrete is a brittle material, its explosion resistance is obviously insufficient under the action of explosion loads. Once the built-in steel tube-concrete composite structural columns are damaged by explosions, they lose their bearing capacity and cause partial continuous collapse of the structure, which will cause huge casualties and economic losses; therefore, the explosion-proof design of built-in steel tube-concrete composite structural columns is very necessary.

[0003] After searching, the Chinese patent application number CN202210720763.8 discloses a hollow sandwich steel tube concrete support system and a construction method thereof, wherein the hollow sandwich steel tube concrete support system includes a hollow sandwich steel tube concrete support assembly, a fixed end and a movable end, wherein the fixed end is connected to one end of the hollow sandwich steel tube concrete support assembly; the movable end includes a sand barrel portion, a push body portion, a sand body and an adjusting bolt, one end of the sand barrel portion is connected to the other end of the hollow sandwich steel tube concrete support assembly, the interior of the sand barrel portion has an accommodating cavity, the push body portion is inserted into the accommodating cavity and is slidably arranged on the interior of the sand barrel portion, the push body portion is in the accommodating cavity and the inner wall of the sand barrel portion and the end of the sand barrel portion close to the hollow sandwich steel tube concrete support assembly are surrounded by a sand storage space, the sand barrel portion is also provided with a sand filling hole and a first switch member, the sand body is filled in the sand storage space, and the adjusting bolt is adjustably penetrated on the sand barrel portion; by adjusting the length of the adjusting bolt inserted into the sand storage space, the sand storage space is filled and compressed. The support system in the above patent has the following deficiencies: although it can meet certain support requirements, its explosion resistance is still insufficient and needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an explosion-proof hollow steel tube-concrete composite structural column and its auxiliary support system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An explosion-proof hollow steel tube-concrete composite structural column, comprising:

[0007] A hollow steel pipe, wherein an energy absorbing material layer is arranged on the outer side of the hollow steel pipe, and the energy absorbing material layer adopts a foam aluminum structure with a circular cross-section;

[0008] An octagonal steel cage, the octagonal steel cage comprising second longitudinal steel bars and second stirrups, the second stirrups being fixed to the outside of each second longitudinal steel bar, and the octagonal steel cage being located on the outside of the energy absorbing material layer;

[0009] The composite material layer is arranged outside the energy absorbing material layer, the octagonal steel cage is arranged inside the composite material layer, the composite material layer presents an octagonal structure adapted to the octagonal steel cage, and the composite material layer adopts polyvinyl alcohol-basalt hybrid fiber cement-based material;

[0010] A four-corner steel cage, the four-corner steel cage comprising first longitudinal steel bars and first stirrups, wherein the first stirrups are fixed to the outer sides of each first longitudinal steel bar;

[0011] A concrete protective layer is arranged outside the four-corner steel cages, and a concrete layer is arranged between the concrete protective layer and the composite material layer.

[0012] Preferably: the auxiliary support system of the explosion-proof hollow steel tube-concrete composite structural column comprises:

[0013] A support platform is fixed to the top side of the concrete protective layer. The support platform is a tripod frame structure. Four support platforms are arranged in a circumferential distribution about the concrete protective layer.

[0014] A vertical support assembly, which is arranged below the support platform and is used to support the support platform;

[0015] The horizontal support assembly is installed between the support platforms of two concrete protective layers to enhance the structural firmness.

[0016] Further: the vertical support assembly includes:

[0017] A support column, wherein a positioning cylinder is arranged on the support platform, and the top end of the support column is installed in the positioning cylinder;

[0018] The base, the support column is installed on the top inner wall of the base through threads;

[0019] The support column is fixed to the side surface of the concrete protective layer through an auxiliary fixing piece.

[0020] Further preferably: the auxiliary fixing member comprises:

[0021] A side bracket, one end of which is fixed in the concrete protective layer, and the other end of which is in a U-shaped structure adapted to the support column;

[0022] The fixed bracket is in a U-shaped structure that matches the support column. The fixed bracket is fixed to the side bracket through a screw. The side bracket and the fixed bracket cooperate to form a hoop-type fixing structure for the support column.

[0023] As a preferred embodiment of the present invention: the outer walls on both sides of the top of the support platform are provided with connecting ears, and the same connecting frame is installed on the connecting ears of two adjacent support platforms.

[0024] As a further preferred embodiment of the present invention: a first connecting seat is fixed to the outer wall of the bottom of the support platform, a second connecting seat is rotatably mounted on the first connecting seat, an annular threaded seat is mounted on one side of the second connecting seat, and the horizontal support assembly is mounted between the two annular threaded seats;

[0025] The horizontal support assembly includes a transverse support tube and a transverse support rod. One end of the two transverse support tubes is respectively connected to two annular threaded seats through threads, and the two ends of the transverse support rod are slidably connected to the inner walls of the two transverse support tubes.

[0026] A first fixing knob is threadedly connected to an inner wall of one side of the second connecting seat, and the first fixing knob is used to fix the second connecting seat on the first connecting seat.

[0027] As a further solution of the present invention: a plurality of annular convex discs are arranged on the transverse support tube, a hanging rod is fixed between two annular convex discs, and the hanging rods are arranged in a circumferential distribution with respect to the transverse support tube;

[0028] The horizontal support assembly is also used in conjunction with a protective net, a connecting hook is fixed to the edge of the protective net, and the protective net is hung on the hanging rod of the horizontal support tube through the connecting hook.

[0029] On the basis of the above scheme: the auxiliary support system further includes a protective net support assembly, and the protective net support assembly includes:

[0030] A support frame, wherein a connecting hook is fixed on the outer circumferential wall of the top of the support frame;

[0031] A support arm, the support arm is installed at the end of the connecting hook, and the support arm is an L-shaped structure;

[0032] A connecting tube is installed on the top of the supporting arm, and a supporting plate is arranged on the top of the connecting tube.

[0033] Preferably, based on the above solution: one end of the support arm is slidably connected to the inner wall of the connecting hook, and the outer wall of one side of the connecting hook is threadedly connected with a second fixing knob for fixing the support arm;

[0034] The other end of the support arm is slidably connected to the inner wall of the bottom of the connecting tube, and the inner wall of one side of the connecting tube is threadedly connected with a third fixing knob for fixing the support arm.

[0035] Based on the above scheme, it is further preferred that: a card slot is opened on the outer wall of the top of the support plate, the protective net is in a cross-staggered structure, and the card slot is in a cross-shaped structure that matches the protective net.

[0036] The beneficial effects of the present invention are:

[0037] 1. The present invention utilizes the high rigidity of the polyvinyl alcohol-basalt hybrid fiber cement-based composite material and the energy absorption property of the circular cross-section foam aluminum, and the composite material layer and the energy absorption material layer are in surface contact with each other, thereby increasing the overall effect between the two materials; if an explosion occurs, the structure can well absorb the energy of the explosion impact load, reduce the explosion damage, maximize the explosion resistance of the composite structure column, and improve its bearing capacity.

[0038] 2. The present invention increases the bending and shearing resistance of the composite structural column by combining a structure with a built-in polyvinyl alcohol-basalt hybrid fiber cement-based composite material layer and a circular cross-section foam aluminum energy-absorbing material layer, effectively improves the overall bending deformation of the composite structural column, and further improves the vertical residual bearing capacity of the composite structural column under the action of explosion load, thereby avoiding the occurrence of partial collapse or even overall collapse of the building structure, so as to avoid casualties.

[0039] 3. The present invention can strengthen the connection between the vertical support assembly and the combined structural column by providing auxiliary fixing parts, thereby further improving the structural firmness; and by providing a connecting frame, the stability between the structures can be improved to a certain extent, thereby improving the reliability.

[0040] 4. The present invention provides a horizontal support assembly, which can be used to connect and fix the support platforms on different combined structural columns, thereby forming a support system and improving practicality; by providing structures such as protective nets, the protective effect of the support system can be further improved, thereby improving practicality.

[0041] 5. The present invention provides auxiliary support for the middle part of the protective net and other positions by setting a protective net support assembly, thereby preventing the protective net from falling and deforming, and improving reliability; by setting a second fixed knob, a third fixed knob and other structures, the position of the support arm and the support plate can be adjusted according to actual conditions, thereby changing the support position of the protective net, thereby improving practicality and flexibility of use.

[0042] 6. The present invention provides a card slot, which can lock the protection net in the card slot to prevent the protection net from sliding on the top surface of the support plate, thereby further ensuring the reliability of the support for the protection net. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic structural diagram of an explosion-proof hollow steel tube-concrete composite structural column and its auxiliary support system proposed by the present invention;

[0044] Figure 2 This is a partial structural schematic diagram of an explosion-proof hollow steel tube-concrete composite structural column and its auxiliary support system proposed by the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of an explosion-proof hollow steel tube-concrete composite structural column and its auxiliary support system with the protective net removed from the hanging rod;

[0046] Figure 4 This is a partial structural schematic diagram of an explosion-proof hollow steel tube-concrete composite structural column and a protective net support component of its auxiliary support system proposed by the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of an explosion-proof hollow steel tube-concrete composite structural column and its auxiliary support system connected by hooks hung on a hanging rod;

[0048] Figure 6 This is a schematic diagram of the structure of an explosion-proof hollow steel tube-concrete composite structural column and its auxiliary support system, wherein the second connecting seat, annular threaded seat, and transverse support tube are separated;

[0049] Figure 7 This is a schematic structural diagram of an explosion-proof hollow steel tube-concrete composite structural column and its auxiliary support system side bracket and fixed bracket split according to the present invention;

[0050] Figure 8 This is a schematic diagram of the structure of an explosion-proof hollow steel tube-concrete composite structural column proposed by the present invention;

[0051] Fig. 9 This is a stability comparison chart of the experimental test of the present invention.

[0052] In the figure: 1 concrete protective layer, 2 base, 3 support frame, 4 support column, 5 protection net, 6 support platform, 7 horizontal support tube, 8 connecting frame, 9 horizontal support rod, 10 side bracket, 11 support arm, 12 connecting hook, 13 third fixing knob, 14 slot, 15 second fixing knob, 16 support plate, 17 connecting tube, 18 hanging rod, 19 fixing bracket, 20 annular threaded seat, 21 first connecting seat, 22 second connecting seat, 23 positioning tube, 24 threaded member, 25 first fixing knob, 26 connecting ear, 27 hollow steel pipe, 28 energy absorbing material layer, 29 composite material layer, 30 first stirrup, 31 first longitudinal steel bar, 32 second longitudinal steel bar, 33 second stirrup. DETAILED DESCRIPTION

[0053] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0054] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0055] Embodiment 1:

[0056] An explosion-proof hollow steel tube-concrete composite structural column, such as Figure 1-8 As shown, including:

[0057] A hollow steel tube 27, wherein an energy absorbing material layer 28 is disposed on the outer side of the hollow steel tube 27, and the energy absorbing material layer 28 adopts a foam aluminum structure with a circular cross-section;

[0058] An octagonal steel cage, the octagonal steel cage includes second longitudinal steel bars 32 and second stirrups 33, the second stirrups 33 are fixed to the outside of each second longitudinal steel bar 32, and the octagonal steel cage is located outside the energy absorbing material layer 28;

[0059] A composite material layer 29, the composite material layer 29 is arranged outside the energy absorbing material layer 28, the octagonal steel cage is arranged inside the composite material layer 29, the composite material layer 29 is an octagonal structure adapted to the octagonal steel cage, and the composite material layer 29 is made of polyvinyl alcohol-basalt hybrid fiber cement-based material;

[0060] A four-corner steel cage, the four-corner steel cage comprising first longitudinal steel bars 31 and first stirrups 30, the first stirrups 30 being fixed to the outer sides of each first longitudinal steel bar 31;

[0061] Concrete protective layer 1, the concrete protective layer 1 is arranged outside the four-corner steel cage, and a concrete layer is arranged between the concrete protective layer 1 and the composite material layer 29;

[0062] By taking advantage of the high rigidity of the polyvinyl alcohol-basalt hybrid fiber cement-based composite material and the energy absorption property of the circular cross-section foam aluminum, the composite material layer 29 and the energy absorption material layer 28 are in surface contact with each other, thereby increasing the overall effect between the two materials. If an explosion occurs, the structure can well absorb the energy of the explosion impact load, reduce explosion damage, maximize the explosion resistance of the composite structural column, and improve its bearing capacity.

[0063] By combining a structure with a built-in polyvinyl alcohol-basalt hybrid fiber cement-based composite material layer 29 and a circular cross-section foam aluminum energy-absorbing material layer 28, the bending and shearing resistance of the composite structural column is increased, the overall bending deformation of the composite structural column is effectively improved, and the vertical residual bearing capacity of the composite structural column under the action of explosion load is further improved, avoiding the occurrence of partial collapse or even overall collapse of the building structure, so as to avoid casualties.

[0064] In order to provide better support effect; Figure 6 , Figure 7 As shown, the auxiliary support system of the explosion-proof hollow steel tube-concrete composite structural column includes:

[0065] A support platform 6, the support platform 6 is fixed to the top side of the concrete protective layer 1, the support platform 6 is a tripod frame structure, and four support platforms 6 are arranged in a circumferential distribution about the concrete protective layer 1;

[0066] A vertical support assembly, the vertical support assembly is arranged below the support platform 6 and is used to support the support platform 6;

[0067] A horizontal support assembly is installed between the support platforms 6 of two concrete protective layers 1 to enhance the structural firmness.

[0068] In order to ensure the firmness of the support; Figure 6 , Figure 7 As shown, the vertical support assembly includes:

[0069] The support column 4 is provided with a positioning cylinder 23 in an integrated manner on the support platform 6, and the top end of the support column 4 is installed in the positioning cylinder 23;

[0070] The base 2, the support column 4 is installed on the top inner wall of the base 2 through threads;

[0071] The support column 4 is fixed to the side surface of the concrete protective layer 1 through an auxiliary fixing piece.

[0072] In order to better assist in fixing the support column 4; Figure 7 As shown, the auxiliary fixing member includes:

[0073] A side bracket 10, one end of which is fixed in the concrete protective layer 1, and the other end of which is in a U-shaped structure adapted to the support column 4;

[0074] A fixed bracket 19, the fixed bracket 19 is a U-shaped structure adapted to the support column 4, the fixed bracket 19 is fixed to the side bracket 10 by a screw member 24, and the side bracket 10 and the fixed bracket 19 cooperate to form a hoop-type fixing structure for the support column 4;

[0075] By providing auxiliary fixings, the connection between the vertical support assembly and the combined structural column can be strengthened, further improving the structural firmness.

[0076] In order to improve the structural strength; Figure 7 As shown, the outer walls on both sides of the top of the support platform 6 are integrally provided with connecting ears 26, and the same connecting frame 8 is installed on the connecting ears 26 of two adjacent support platforms 6;

[0077] By providing the connecting frame 8, the stability between the structures can be improved to a certain extent, thereby improving the reliability.

[0078] In order to further improve the structural strength; Figure 5-7 As shown, a first connecting seat 21 is fixed to the outer wall of the bottom of the support platform 6, a second connecting seat 22 is rotatably mounted on the first connecting seat 21, an annular threaded seat 20 is mounted on one side of the second connecting seat 22, and the horizontal support assembly is installed between the two annular threaded seats 20;

[0079] The horizontal support assembly includes a transverse support tube 7 and a transverse support rod 9. One end of the two transverse support tubes 7 is respectively connected to two annular threaded seats 20 through threads, and the two ends of the transverse support rod 9 are slidably connected to the inner walls of the two transverse support tubes 7.

[0080] A first fixing knob 25 is connected to an inner wall of one side of the second connecting seat 22 through a thread, and the first fixing knob 25 is used to fix the second connecting seat 22 on the first connecting seat 21;

[0081] By providing a horizontal support assembly, the support platforms 6 on different combined structural columns can be connected and fixed using the horizontal support assembly, thereby forming a support system, thereby improving practicality.

[0082] To improve practicality; Figure 3 , Figure 5 As shown, the transverse support tube 7 is provided with a plurality of annular convex discs, and a hanging rod 18 is fixed between two annular convex discs, and the hanging rod 18 is arranged in a circumferential distribution with respect to the transverse support tube 7;

[0083] The horizontal support assembly is also used in conjunction with a protective net 5, a connecting hook 12 is fixed to the edge of the protective net 5, and the protective net 5 is hung on the hanging rod 18 of the horizontal support tube 7 through the connecting hook 12;

[0084] By providing structures such as the protective net 5, the protective effect of the support system can be further improved, thereby enhancing its practicality.

[0085] Embodiment 2:

[0086] An explosion-proof hollow steel tube-concrete composite structural column, such as Figure 1 As shown, in order to facilitate the support of the protective net 5; this embodiment makes the following improvements on the basis of embodiment 1: the auxiliary support system also includes a protective net support component, and the protective net support component includes:

[0087] A support frame 3, a connecting hook 12 is fixed to the outer circumferential wall of the top of the support frame 3;

[0088] A support arm 11, the support arm 11 is installed at the end of the connecting hook 12, and the support arm 11 is an L-shaped structure;

[0089] A connecting tube 17, which is mounted on the top of the support arm 11, and a supporting plate 16 is integrally provided on the top of the connecting tube 17;

[0090] By setting up the protective net support assembly, auxiliary support can be provided to the middle part of the protective net and other positions to prevent the protective net from falling and deforming, thereby improving reliability.

[0091] In order to facilitate the adjustment of the support position; Figure 4 As shown, one end of the support arm 11 is slidably connected to the inner wall of the connecting hook 12, and the outer wall of one side of the connecting hook 12 is threadedly connected with a second fixing knob 15 for fixing the support arm 11;

[0092] The other end of the support arm 11 is slidably connected to the inner wall of the bottom of the connecting tube 17, and a third fixing knob 13 for fixing the support arm 11 is threadedly connected to the inner wall of one side of the connecting tube 17;

[0093] By providing structures such as the second fixing knob 15 and the third fixing knob 13, the positions of the support arm 11 and the support plate 16 can be adjusted according to actual conditions, thereby changing the supporting position of the protection net 5, thereby improving practicality and flexibility of use.

[0094] In order to improve the support effect; Figure 4 As shown, a slot 14 is provided on the top outer wall of the support plate 16, and the protection net 5 is in a cross-staggered structure, and the slot 14 is in a cross-shaped structure adapted to the protection net 5;

[0095] By providing the card slot 14 , the protection net 5 can be stuck in the card slot 14 to prevent the protection net 5 from sliding on the top surface of the support plate 16 , thereby further ensuring the reliability of the support for the protection net 5 .

[0096] experiment:

[0097] In order to ensure the effect of the protective net support assembly, the length L1 and width D1 of the protective net 5 are set, the spacing of the vertically distributed support plates 16 is L2, and the spacing of the horizontally distributed support plates 16 is D2; L1 / L2=D1 / D2=K, where K is a multiple. The multiple is changed and the support capacity after the change is evaluated, and the following conclusions are obtained:

[0098] K＝3 K＝4 K＝5 K＝6 Stability of protective net 92.1 91.4 90.8 85.2 Stability of protective net support components 87.6 90.5 93.9 94.2

[0099] From the above, it can be seen that considering the stability of the comprehensive protection net 5 and the protection net supporting components, the solution of K=5 should be selected.

[0100] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An explosion-proof hollow steel tube-concrete composite structural column, It is characterized in that include: A hollow steel pipe (27), wherein an energy absorbing material layer (28) is arranged on the outer side of the hollow steel pipe (27), and the energy absorbing material layer (28) adopts a foamed aluminum structure with a circular ring cross section; An octagonal steel cage, the octagonal steel cage comprising second longitudinal steel bars (32) and second stirrups (33), the second stirrups (33) being fixed to the outside of each second longitudinal steel bar (32), and the octagonal steel cage being located outside the energy absorbing material layer (28); A composite material layer (29), the composite material layer (29) is arranged outside the energy absorbing material layer (28), the octagonal steel cage is arranged inside the composite material layer (29), the composite material layer (29) is in an octagonal structure matching the octagonal steel cage, and the composite material layer (29) is made of polyvinyl alcohol-basalt hybrid fiber cement-based material; A four-corner steel cage, the four-corner steel cage comprising first longitudinal steel bars (31) and first stirrups (30), wherein the first stirrups (30) are fixed to the outer sides of each first longitudinal steel bar (31); A concrete protective layer (1) is arranged outside the four-corner steel cage, and a concrete layer is arranged between the concrete protective layer (1) and the composite material layer (29); and an auxiliary support system of an explosion-proof hollow steel tube-concrete composite structural column is also included, specifically including: A support platform (6), the support platform (6) is fixed to the top side of the concrete protective layer (1), the support platform (6) is a tripod frame structure, and four support platforms (6) are arranged in a circumferential distribution with respect to the concrete protective layer (1); A vertical support assembly, the vertical support assembly is arranged below the support platform (6) and is used to support the support platform (6); A horizontal support assembly, which is installed between the support platforms (6) of the two concrete protective layers (1) to enhance the structural strength; And the protective net support assembly, the protective net support assembly includes: A support frame (3), wherein a connecting hook (12) is fixed on the outer circumferential wall of the top of the support frame (3); A support arm (11), the support arm (11) is mounted on the end of the connecting hook (12), and the support arm (11) is an L-shaped structure; A connecting tube (17), the connecting tube (17) is mounted on the top of the support arm (11), and a supporting plate (16) is arranged on the top of the connecting tube (17); one end of the support arm (11) is slidably connected to the inner wall of the connecting hook (12), and a second fixing knob (15) for fixing the support arm (11) is connected to the outer wall of one side of the connecting hook (12) through a thread; The other end of the support arm (11) is slidably connected to the inner wall of the bottom of the connecting tube (17), and a third fixing knob (13) for fixing the support arm (11) is threadedly connected to the inner wall of one side of the connecting tube (17).

2. The explosion-proof hollow steel tube-concrete composite structural column according to claim 1, It is characterized in that The vertical support assembly comprises: A support column (4), wherein a positioning cylinder (23) is arranged on the support platform (6), and the top end of the support column (4) is installed in the positioning cylinder (23); The base (2) and the support column (4) are installed on the top inner wall of the base (2) through threads; The support column (4) is fixed to the side surface of the concrete protective layer (1) via an auxiliary fixing piece.

3. The explosion-proof hollow steel tube-concrete composite structural column according to claim 2, It is characterized in that The auxiliary fixing member comprises: A side bracket (10), one end of the side bracket (10) is fixed in the concrete protective layer (1), and the other end of the side bracket (10) is in a U-shaped structure adapted to the support column (4); The fixing bracket (19) is in a U-shaped structure adapted to the support column (4). The fixing bracket (19) is fixed to the side bracket (10) via a screw member (24). The side bracket (10) and the fixing bracket (19) cooperate to form a hoop-type fixing structure for the support column (4).

4. The explosion-proof hollow steel tube-concrete composite structural column according to claim 1, It is characterized in that The outer walls on both sides of the top of the support platform (6) are provided with connecting ears (26), and the same connecting frame (8) is installed on the connecting ears (26) of two adjacent support platforms (6).

5. The explosion-proof hollow steel tube-concrete composite structural column according to claim 1, It is characterized in that A first connecting seat (21) is fixed to the outer wall of the bottom of the support platform (6), a second connecting seat (22) is rotatably mounted on the first connecting seat (21), an annular threaded seat (20) is mounted on one side of the second connecting seat (22), and the horizontal support assembly is mounted between the two annular threaded seats (20); The horizontal support assembly comprises a transverse support tube (7) and a transverse support rod (9), one end of the two transverse support tubes (7) are respectively connected to two annular threaded seats (20) through threads, and the two ends of the transverse support rod (9) are slidably connected to the inner walls of the two transverse support tubes (7); A first fixing knob (25) is threadedly connected to an inner wall of one side of the second connecting seat (22), and the first fixing knob (25) is used to fix the second connecting seat (22) to the first connecting seat (21).

6. The explosion-proof hollow steel tube-concrete composite structural column according to claim 5, It is characterized in that The transverse support tube (7) is provided with a plurality of annular convex disks, a hanging rod (18) is fixed between two annular convex disks, and the hanging rod (18) is arranged in a circumferential distribution with respect to the transverse support tube (7); The horizontal support assembly is also used in conjunction with a protective net (5), a connecting hook (12) is fixed to the edge of the protective net (5), and the protective net (5) is hung on a hanging rod (18) of the horizontal support tube (7) through the connecting hook (12).

7. The explosion-proof hollow steel tube-concrete composite structural column according to claim 1, It is characterized in that The top outer wall of the support plate (16) is provided with a slot (14), the protection net (5) is in a cross-staggered structure, and the slot (14) is in a cross-shaped structure that matches the protection net (5).

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