CN211395982U - Inside additional strengthening of full bolted connection's square steel tubular column - Google Patents
Inside additional strengthening of full bolted connection's square steel tubular column Download PDFInfo
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- CN211395982U CN211395982U CN201922049065.6U CN201922049065U CN211395982U CN 211395982 U CN211395982 U CN 211395982U CN 201922049065 U CN201922049065 U CN 201922049065U CN 211395982 U CN211395982 U CN 211395982U
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Abstract
The utility model discloses an inside additional strengthening of full bolted connection's square steel tubular column, process two sets of bolt holes on square steel tubular column's connected node and inside reinforcement separately earlier, insert the anchor section of necking down bolt into sixth group bolt hole, adjust the depth of insertion, make the length of the necking down section that exposes be greater than the thickness of inside reinforcement, then push inside reinforcement to connected node along the axial of square steel tubular column, when the open long round hole of inside reinforcement reachs the necking down section, and after inserting the necking down section, the necking down section plays limiting displacement, fix a position inside reinforcement; screwing out the necking bolt, and clamping and fixing the internal reinforcing section through the anchoring section; and screwing the first group of high-strength bolts into the aligned first group of bolt holes and the fourth group of bolt holes to further fix the internal reinforcing member. And then simultaneously manufacturing a second group of bolt holes of the internal reinforcement and a fifth group of bolt holes of the steel pipe column, and arranging threads matched with the high-strength bolts in the holes.
Description
Technical Field
The utility model relates to a steel construction manufacturing field, concretely relates to inside additional strengthening of full bolted connection's square steel tubular column.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
In a steel structure, the closed section column has better mechanical properties than the open section column, such as large bending rigidity and torsional rigidity, no weak axis and the like. The threaded anchoring unilateral bolt can be installed and screwed from one side, and the bolted connection of the closed cross-section steel pipe column joint is realized. But since steel pipe column walls are typically thin, the nodal region is susceptible to failure due to column wall failure. Therefore, the steel pipe column without reinforcing measures cannot be directly connected by steel beam-steel column unilateral bolt end plates at the joints.
At present, the commonly used steel pipe column joint reinforcing method is to weld I-shaped steel or other internal reinforcing parts in the steel pipe column. Before welding, the steel pipe column is generally cut off, and after the welding of the internal reinforcement is completed, the steel pipe column is subjected to butt welding. However, the construction method has complex procedures and large welding amount; meanwhile, the welding position is in a beam-column joint area with complex stress, and the structural safety and the seismic energy consumption resistance are influenced.
Disclosure of Invention
In order to solve the technical problem existing in the prior art, the utility model aims at providing an inside additional strengthening of full bolted connection's square steel tubular column.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model provides an inside additional strengthening of full bolted connection's square steel tubular column, includes:
the inner reinforcing piece is sequentially provided with a first group of bolt holes, a second group of bolt holes and a third group of bolt holes from one end to the other end, the first group of bolt holes and the second group of bolt holes are both provided with internal threads, and the third group of bolt holes are all open long round holes;
the square steel pipe column is connected with the node and is sequentially provided with a fourth group of bolt holes, a fifth group of bolt holes and a sixth group of bolt holes along the axis direction, and internal threads are machined in the fifth group of bolt holes and the sixth group of bolt holes;
the number and the arrangement mode of the three groups of bolt holes of the square steel pipe column correspond to the three groups of bolt holes of the internal reinforcement in sequence;
the second group of bolt holes of the internal reinforcement and the fifth group of bolt holes of the square steel pipe column need to be manufactured after the internal reinforcement is installed and fixed.
The necking bolt is sequentially provided with a thread section, a necking section, an anchoring section and a nut. The diameters of the thread section, the anchoring section and the necking section are reduced in sequence; the number of the necking bolts is equal to that of the sixth group of bolt holes, the thread sections of the necking bolts are arranged in the sixth group of bolt holes in a matched mode, and the third group of bolt holes of the internal reinforcing piece are inserted into the necking sections and are fastened by the anchoring sections;
the first group of high-strength bolts penetrate through the fourth group of bolt holes from outside to inside and are matched with the first group of bolt holes, and the internal reinforcing piece is fixed on the square steel pipe column;
and the second group of high-strength bolts are sequentially matched with the fifth group of bolt holes and the second group of bolt holes from outside to inside and are used for connecting the steel beam to be connected and the end plate to the square steel pipe column.
The first group of bolt holes and the second group of bolt holes are processed with internal threads, can be matched with high-strength bolts, and can be installed on one side and screwed down on one side.
In an embodiment, the third and sixth groups of bolt holes are in the same position and number.
Further, the first group of bolt holes and the fourth group of bolt holes are identical in position and number.
When the internal reinforcement is installed, firstly, the anchoring end of the necking bolt is inserted into the sixth group of bolt holes, the anchoring is carried out on the threads in the sixth group of bolt holes, and the threads are screwed to a proper position, so that the length of the necking section exposed out of the inner wall of the square steel pipe is greater than the thickness of the internal reinforcement, then the internal reinforcement is pushed to the connecting node along the axial direction of the square steel pipe column, the necking section is reached by the open type long round hole of the internal reinforcement, and the necking section is inserted, the necking section plays a limiting role, and the internal reinforcement is positioned.
The necking bolt is provided with the anchoring section, the necking bolt can be screwed out after the internal reinforcing piece is positioned, and the internal reinforcing piece is clamped and fixed through the anchoring section.
And the second group of bolt holes and the fifth group of bolt holes are uniformly manufactured after the internal reinforcing part is fixed, and internal threads are machined in the holes. The high-strength bolt is matched and connected with the fifth group of bolt holes and the second group of bolt holes in sequence, so that the connection strength of the connection part can be improved, and the connecting piece can be firmly connected conveniently.
In some embodiments, the internal reinforcement is a planar member steel plate, or a solid member H-section steel or steel pipe.
A construction method of an internal reinforcing structure of a full-bolt-connected square steel pipe column comprises the following steps:
firstly, a fourth group of bolt holes and a sixth group of bolt holes are pre-processed at the joint of the square steel pipe column, wherein the fourth group of bolt holes are unthreaded, and the sixth group of bolt holes are internally provided with threads matched with necking bolts; the internal reinforcement is pre-machined with a first group of bolt holes having threads and a fourth group of bolt holes being open-type oblong holes. Screwing the anchoring sections of the necking bolts into the sixth group of bolt holes, adjusting the insertion depth to enable the length of the exposed necking sections to be larger than the thickness of the internal reinforcing piece, then pushing the internal reinforcing piece to the connecting node along the axial direction of the square steel pipe column, enabling the necking sections to play a limiting role after the open type long round holes of the internal reinforcing piece reach the necking sections and are inserted into the necking sections, and positioning the internal reinforcing piece;
screwing out the necking bolt, and clamping and fixing the internal reinforcing section through the anchoring section;
and screwing the first group of high-strength bolts into the aligned first group of bolt holes and the aligned fourth group of bolt holes, and further fixing the internal reinforcing piece to provide conditions for manufacturing the second group of bolt holes and the fifth group of bolt holes.
And then simultaneously manufacturing a fifth group of bolt holes of the steel pipe column and a second group of bolt holes of the reinforcing piece, wherein the holes are provided with threads. And in a construction site, the end plates of the steel beams are fixed in the fifth group of bolt holes of the steel pipe column and the second group of bolt holes of the reinforcement through the second group of high-strength bolts.
The utility model has the advantages that:
(1) the construction method is completely carried out through bolt connection, the traditional welding process is avoided, the machining precision is improved, and the machining quality is guaranteed. And the construction method is simple, the operability is strong, and the construction efficiency is improved.
(2) All components are prefabricated in a factory and do not need to be welded, and field assembly and welding are not needed, so that the fully-assembled machining process is realized. The construction process is green and environment-friendly, the component quality is guaranteed, the construction efficiency is improved, and the prefabrication level is greatly improved.
(3) The utility model discloses a reinforced structure, simple structure, the atress is reasonable. The unilateral connection can be realized by using a common high-strength bolt. The problem that ordinary steel-pipe column node is difficult to be connected with the bolt is solved, the anchoring depth of the bolt is increased through the internal reinforcing member, and the problem of applicability of the unilateral bolt in the steel structure node is solved. Meanwhile, the structural arrangement form is flexible, the form and the position of the reinforcing member can be selected according to actual needs, and the applicability of the node is strong.
(4) The internal reinforcing part is also a reinforcing component for the column wall, the rigidity and the bending resistance of the column wall in the node area are obviously enhanced, and the occurrence of bad failure modes such as column wall buckling is avoided. When a three-dimensional internal reinforcement is used, the resistance of the nodal region can be further improved. The integral structure of the node accords with the anti-seismic design principle of a strong node, a weak member and a strong column and a weak beam, and the anti-seismic performance of the structure is improved.
(5) The steel pipe column structure adopts an internal reinforcing mode, and the external structure of the node is not influenced. Therefore, the utility model has beautiful appearance and fully utilizes the space.
(6) Due to the reinforcing effect of the reinforcing members on the node, the node area may not need to be additionally provided with stiffening ribs. Meanwhile, the node uses the thread to anchor the unilateral bolt, and a nut is not needed. Therefore, the node construction mode saves the material consumption and reduces the manufacturing cost.
(7) The utility model discloses a construction method can avoid the welding of prefabricated link in mill and site operation link to can simplify the processing step, improve the precision of processing. The reinforced steel pipe column structure can solve the problems of insufficient steel pipe strength and rigidity at the joint of the steel beam-steel pipe column end plate. In the reinforced steel pipe column structure, the node can be connected by using the screw thread anchoring unilateral bolt to realize full bolt connection, the anchoring depth of the node unilateral bolt can be increased, and the problem of applicability of the screw thread anchoring type unilateral bolt in actual engineering is solved.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a schematic view of a steel pipe column used in the steel pipe column structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of an internal reinforcement for a steel pipe column structure according to example 1 of the present invention;
FIG. 3 is a schematic view of a necked bolt in an embodiment of the present invention;
FIG. 4 is a schematic view of a steel pipe column structure connection construction method in embodiment 1 of the present invention;
fig. 5 is a front view of a node after the installation of the steel pipe column structure in embodiment 1 of the present invention is completed;
fig. 6 is a sectional view of the internal structure of the joint after the installation of the steel pipe column structure in embodiment 1 of the present invention;
fig. 7 is a schematic structural view of an internal reinforcement after the installation of the steel pipe column structure in embodiment 1 of the present invention is completed;
fig. 8 is a schematic view of a steel pipe column structure after the installation of the steel pipe column structure in embodiment 1 of the present invention is completed;
fig. 9 is a schematic view of an H-shaped steel type internal reinforcement for a steel pipe column structure according to embodiment 2 of the present invention.
The steel pipe column comprises 1, necking bolts, 11, nuts, 12, thread sections, 13, necking sections, 14, anchoring sections, 21, a first group of high-strength bolts, 22, a second group of high-strength bolts, 3, a square steel pipe column, 31, a sixth group of bolt holes, 32, a fourth group of bolt holes, 33, a fifth group of bolt holes, 4, an internal reinforcing member, 41, a second group of bolt holes, 42, a first group of bolt holes, 43, an open type long round hole, 5, an internal reinforcing member, 52, an internal reinforcing member second bolt hole, 53, a second open type long round hole, 6, an end plate, 7 and a steel beam.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1 to 8, the all-bolt connection internal reinforcement includes a necked bolt 1, a first group of high-strength bolts 21, a second group of high-strength bolts 22, a square steel pipe column 3, a steel plate type internal reinforcement 4, and the like.
As shown in fig. 3, the necked bolt 1 is a special single-sided bolt, and is a positioning device and an anchoring device for the internal reinforcement 4. The structure forms four parts through the change of the axial diameter: nut 11, screw thread section 12, necking down section 13, the anchor section 14 of afterbody. The diameter of the neck section 13 is smaller than the diameter of the threaded section 12 and the diameter of the anchoring section 14 at the tail, and is slightly smaller than the diameter of the end of the open oblong hole 43 of the internal reinforcement 4, and the length of the neck section 13 is greater than the thickness of the open oblong hole 43. The steel pipe column is provided with anchoring force through threads in the sixth group of bolt holes 31. Positioning the internal reinforcement 4 in contact with the neck section 13 through the bolt holes 43; after the contact positioning, the internal reinforcement 4 is preliminarily fixed by rotating the necking bolt 1 to make the internal reinforcement 4 and the anchoring section 14 at the tail of the bolt extrude and rub.
The first group of high-strength bolts 21 and the second group of high-strength bolts 22 have no special requirements on structures, and can adopt general large hexagon head high-strength bolts. The screw threads in the screw holes of the square steel pipe column 3 and the internal reinforcing piece 4 provide anchoring force for the first group and the second group of high-strength bolts, and a traditional nut is not needed, so that single-side connection at the node of the steel pipe column with the closed cross section is realized. The first group of high-strength bolts 21 are devices for fixing the internal reinforcing member 4, and do not play a role in transmission in the node; and the second set of high strength bolts 22 are the force transfer members in the respective steel pipe column joints.
Two bolt holes are pre-opened on the square steel pipe column 3: the first is a purpose-made bolt hole-a sixth group of bolt holes 31, the position corresponds to the position of the necking bolt 1 in the node, the hole is internally provided with threads, and the size of the threads corresponds to the threads of the thread sections 12 of the necking bolt 1; the second is a standard bolt hole-fourth group of bolt holes 32, which have no thread in the holes and have a diameter slightly larger than the diameter of the corresponding first group of high-strength bolts 21, so as to avoid the difficulty in screwing the bolts due to misalignment between the bolt holes of the sixth group of bolt holes 31 and the bolt holes of the first group of bolt holes 42 of the internal reinforcing member caused by machining errors.
Two bolt holes are pre-opened on the internal reinforcing part 4: an open oblong hole 43 and a threaded first set of bolt holes 42. The first group of bolt holes 42 are matched with the first group of high-strength bolts 21, threads are arranged in the holes, and the diameters and the threads of the bolt holes correspond to those of the high-strength bolts; the lower part is also provided with an open type long round hole 43 as a limiting hole, the diameter of the end part of the open type long round hole 43 is slightly larger than that of the necking section 13 of the necking bolt 1 and smaller than that of the tail anchoring section 14, and the open type long round hole 43 is contacted and clamped with the necking section 13 of the necking bolt 1 through the long round hole 43 to provide positioning for the internal reinforcement 4.
The specific processing method of the full-bolt connection internal reinforced steel pipe column and the corresponding end plate connecting node comprises the following steps: firstly, screwing a necking bolt 1 into a sixth group of bolt holes 31 on the square steel pipe column 3, connecting threads of an anchoring section 12 with threads in the sixth group of bolt holes 31, and anchoring the necking bolt 1; wherein the neck section 13 extends beyond the column wall for a length greater than the thickness of the open oblong hole 43. Then, the internal reinforcement 4 is placed into the square steel pipe column 3, the open type long round hole 43 is clamped into the threaded necking section 13, and the internal reinforcement 4 is preliminarily positioned; the necking bolt 1 can be rotated from the outside after positioning, and the position of the internal reinforcement 4 is finely adjusted through the axial displacement of the bolt, so that the internal reinforcement 4 is tightly attached to the square steel pipe column 3. The necking bolt 1 may be used in one or more numbers according to actual needs.
After the internal reinforcement 4 is positioned and installed, the high-strength bolt 21 is installed, the internal reinforcement 4 is further fixed, and the internal reinforcement 4 is reliably fixed to the square steel pipe column 3 through the necking bolt 1 and the high-strength bolt 21, so that conditions are provided for subsequent hole opening and tapping; the high-strength bolts 21 pass through the fourth group of bolt holes 32 of the steel pipe column without threads and the first group of bolt holes 42 of the internal reinforcing member in sequence, and the anchoring force of the high-strength bolts is provided by the internal threads of the first group of bolt holes 42 of the internal reinforcing member.
And then uniformly perforating and tapping the opposite steel pipe column 3 and the internal reinforcement 4, manufacturing a second group of bolt holes 41 of the internal reinforcement with threads and a fifth group of bolt holes 33 of the steel pipe column with threads, wherein the threads in the holes are matched with the threads of the high-strength bolt, and thus finishing manufacturing the internally reinforced steel pipe column.
And (3) transporting each part of prefabricated part to the site, connecting the end plates to the square steel pipe column 3 and the internal reinforcing piece 4 by using high-strength bolts, wherein the anchoring force of the high-strength bolts is provided by the second group of bolt holes 41 and the fifth group of bolt holes 33 together, and finishing the installation of the node.
The schematic diagram of the construction method process corresponding to the above embodiment is shown in fig. 4.
Example 2
As shown in fig. 1, 3 and 9, the second members required in the construction method of the all-bolt-joined internally reinforced steel pipe include the necked-down bolts 1, the first group of high-strength bolts 21, the second group of high-strength bolts 22, the square steel pipe column 3, the H-shaped steel type internal reinforcement 5, and the like.
In the construction method of the internally reinforced steel pipe column in example 2, the required necked bolts 1, the first group of high-strength bolts 21, the second group of high-strength bolts 22, and the square steel pipe column 3 are the same as those in example 1. The only difference is the form of the internal reinforcement: the internal reinforcement 5 in example 2 is H-shaped steel, and is a space member capable of further reinforcing a steel pipe column, as shown in fig. 9. Two bolt holes are also preset on the internal reinforcement 5: a second open oblong hole 53 and a threaded bolt hole 52. The bolt holes 52 matched with the high-strength bolts are arranged in advance on one side or two side flanges, and the diameters and the threads of the bolt holes correspond to those of the second group of high-strength bolts 22; the lower part of the second open type long round hole 53 is also used as a limiting hole, the diameter of the end part of the second open type long round hole 53 is slightly larger than the diameter of the necking section 13 of the necking bolt 1, but is smaller than the diameter of the tail anchoring section 14, and the long round hole 43 is in contact with the necking section 13 of the necking bolt 1 to provide positioning for the internal reinforcement 5.
The specific processing method of the internal reinforced steel pipe column and the corresponding end plate connecting node comprises the following steps: firstly, screwing a necking bolt 1 into a sixth group of bolt holes 31 on the square steel pipe column 3, connecting threads of an anchoring section 12 with threads in the sixth group of bolt holes 31, and anchoring the necking bolt 1; wherein the length of the neck section 13 extending beyond the column wall is greater than the thickness of the second open oblong hole 53. Then the internal reinforcement 5 is placed in such a way that the second open oblong hole 53 is snapped into the threaded necking section 13, and the internal reinforcement 5 is initially positioned; the necking bolt 1 can be rotated from the outside after positioning, and the position of the internal reinforcement 5 is finely adjusted through the axial displacement of the bolt, so that the internal reinforcement 5 is tightly attached to the square steel pipe column 3. The necking bolt 1 may be used in one or more numbers according to actual needs.
After the internal reinforcement 5 is positioned and installed, installing a first group of high-strength bolts 21 and further fixing the internal reinforcement 5, so that the square steel pipe column 3 and the internal reinforcement 5 form a reliable integral component, and conditions are provided for subsequent hole opening and tapping; the first group of high-strength bolts 21 sequentially penetrate through the fourth group of bolt holes 32 of the steel pipe column without threads and the second bolt holes 52 of the internal reinforcing piece, and the anchoring force of the high-strength bolts is provided by the second bolt holes 52 of the internal reinforcing piece.
And then, uniformly perforating and tapping two side column walls of the steel pipe column 3 and two side flanges of the internal reinforcement 5, manufacturing a first bolt hole 51 of the internal reinforcement with threads and a fifth bolt hole 33 of the steel pipe column with threads, wherein the threads are matched with the threads of the high-strength bolt, and thus, manufacturing the internally reinforced steel pipe column.
And (3) transporting each part of prefabricated part to the site, connecting the end plate to the square steel pipe column 3 and the internal reinforcing piece 4 by using high-strength bolts, wherein the anchoring force of the high-strength bolts is provided by the bolt holes 51 and the fifth group of bolt holes 33 together, and finishing the node installation.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides an inside additional strengthening of full bolted connection's square steel tubular column which characterized in that: the method comprises the following steps:
the inner reinforcing piece is sequentially provided with a first group of bolt holes, a second group of bolt holes and a third group of bolt holes from one end to the other end, the first group of bolt holes and the second group of bolt holes are both provided with internal threads, and the third group of bolt holes are all open long round holes;
the square steel pipe column is connected with the node and is sequentially provided with a fourth group of bolt holes, a fifth group of bolt holes and a sixth group of bolt holes along the axis direction, and internal threads are machined in the fifth group of bolt holes and the sixth group of bolt holes;
the number and the arrangement mode of the three groups of bolt holes of the square steel pipe column correspond to the three groups of bolt holes of the internal reinforcement in sequence;
the necking bolt is sequentially provided with a nut, a threaded section, a necking section and an anchoring section, and the diameters of the threaded section, the anchoring section and the necking section are sequentially reduced; the number of the necking bolts is equal to that of the sixth group of bolt holes, the thread sections of the necking bolts are arranged in the sixth group of bolt holes in a matched mode, and the third group of bolt holes of the internal reinforcing piece are inserted into the necking sections and are fastened by the anchoring sections;
the first group of high-strength bolts penetrate through the fourth group of bolt holes from outside to inside and are matched with the first group of bolt holes, and the internal reinforcing piece is fixed on the square steel pipe column;
and the second group of high-strength bolts are sequentially matched with the fifth group of bolt holes and the second group of bolt holes from outside to inside and are used for connecting the to-be-connected piece to the square steel pipe column.
2. The inside reinforcing structure of an all-bolt-connected square steel pipe column according to claim 1, characterized in that: the third group of bolt holes and the sixth group of bolt holes are identical in position and number.
3. The inside reinforcing structure of an all-bolt-connected square steel pipe column according to claim 1, characterized in that: the first group of bolt holes and the fourth group of bolt holes are equal in position and number.
4. The inside reinforcing structure of an all-bolt-connected square steel pipe column according to claim 1, characterized in that: and internal threads are processed in the first group of bolt holes, the second group of bolt holes, the fifth group of bolt holes and the sixth group of bolt holes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922049065.6U CN211395982U (en) | 2019-11-22 | 2019-11-22 | Inside additional strengthening of full bolted connection's square steel tubular column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922049065.6U CN211395982U (en) | 2019-11-22 | 2019-11-22 | Inside additional strengthening of full bolted connection's square steel tubular column |
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| CN211395982U true CN211395982U (en) | 2020-09-01 |
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| CN201922049065.6U Expired - Fee Related CN211395982U (en) | 2019-11-22 | 2019-11-22 | Inside additional strengthening of full bolted connection's square steel tubular column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761406A (en) * | 2019-11-22 | 2020-02-07 | 山东大学 | Full-bolt-connected square steel pipe column internal reinforcing structure and construction method thereof |
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2019
- 2019-11-22 CN CN201922049065.6U patent/CN211395982U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761406A (en) * | 2019-11-22 | 2020-02-07 | 山东大学 | Full-bolt-connected square steel pipe column internal reinforcing structure and construction method thereof |
| CN110761406B (en) * | 2019-11-22 | 2024-05-10 | 山东大学 | Full-bolt-connection square steel pipe column inner reinforcing structure and construction method thereof |
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Granted publication date: 20200901 Termination date: 20211122 |