Reinforced restrained rectangular steel tube concrete column and construction method
By using L-shaped steel plates, restraining rods, locking rods and inner support rods in rectangular steel pipe concrete columns, the restraining effect of internal concrete is enhanced, and the problem of insufficient bearing capacity of rectangular steel pipe concrete columns is solved, and higher resistance is achieved. Pressure strength and stability.
Patent Information
- Application Number
- CN202110239206.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-03-04
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2041-03-04
AI Technical Summary
The concrete column of rectangular steel pipe has weak constraints on the internal concrete, resulting in a small bearing capacity and is unable to effectively exert the advantages of steel pipes and concrete.
The steel components such as L-shaped steel plates, restraint rods, locking rods and inner support rods are used to form rectangular steel pipes through fillet welds, and before the internal concrete is filled, pre-tension force is applied through the inner support rods to enhance the function of the restraint rods and improve the concrete. compressive strength and overall stability.
The bearing capacity and stability of the rectangular steel pipe concrete column is significantly improved, ensuring that the restraining rod plays a role in the early stage of load, enhancing the compressive strength of the internal concrete, and avoiding the risk of L-shaped steel plates being separated from the concrete.
Smart Images
Figure CN112832459B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of combined structures in building structures. Background Art
[0002] Steel tube concrete columns have the advantages of high bearing capacity and good seismic performance, and can give full play to the advantages of steel tubes and concrete. The node structure of rectangular steel tube concrete columns is simple and the construction is convenient, but the rectangular steel tube has weak constraints on the internal concrete. The midpoint of the long side has the weakest constraint and cannot play a good constraint role. The impact on the internal concrete compressive strength is small. Compared with circular steel tube concrete columns with the same steel content, its bearing capacity is smaller. In order to improve the bearing capacity of rectangular steel tube concrete columns, it is necessary to strengthen the constraint effect of the steel tube on the internal concrete. Summary of the invention
[0003] In order to solve the problem that the rectangular steel tube concrete column has weak constraint on the internal concrete and small bearing capacity, the present invention discloses a reinforced constraint rectangular steel tube concrete column and a construction method, which has the advantages of simple structure, high bearing capacity and convenient construction.
[0004] The technical scheme of the reinforced restrained rectangular steel tube concrete column of the present invention is: composed of L-shaped steel plates, restraining rods, locking rods, inner support rods and concrete; the restraining rods, locking rods and inner support rods are all steel components; two L-shaped steel plates are spliced to form a rectangular steel tube, and the splicing positions are connected by fillet welds; the restraining rods are welded to the two inner side surfaces of the L-shaped steel plates, and the restraining rods are evenly arranged along the height direction of the L-shaped steel plates. The heights of the restraining rods on the two inner side surfaces of the L-shaped steel plates are different, and the number of restraining rods at the same height is determined according to the limb length of the L-shaped steel plates and design requirements The minimum number of restraint rods is 1, and the vertical spacing of restraint rods is determined according to the design; the heights of the restraint rods on the two L-shaped steel plates are different, and the restraint rods do not collide with each other. When the two L-shaped steel plates are spliced into a rectangular steel tube, a circular channel is formed between the two groups of restraint rods with the same horizontal position; the locking rod is located in the circular channel formed by the restraint rod, and the outer diameter of the locking rod is smaller than the inner diameter of the circular channel; the inner support rod is located in the channel of the locking rod, and the inner support rod supports the locking rod to apply pre-tension to the restraint rod; the rectangular steel tube formed by the two L-shaped steel plates is filled with concrete.
[0005] The restraint rod is U-shaped, consisting of a straight section and a semicircular arc. The restraint rod welded on the long limb of the L-shaped steel plate has a straight section length equal to half the length of the short limb of the L-shaped steel plate. The restraint rod welded on the short limb of the L-shaped steel plate has a straight section length equal to half the length of the long limb of the L-shaped steel plate. The restraint rod can be made of round steel or flat steel.
[0006] The locking rod is composed of two identical parts, each of which has a semicircular cross-section with an arc-shaped groove in the middle. When the two parts of the locking rod are buckled together, the cross-section is circular, and a non-circular channel is formed inside. The length of the locking rod is equal to the height of the L-shaped steel plate.
[0007] The cross section of the inner support rod is circular, one end of the inner support rod is a straight thread head, and the length of the inner support rod is equal to the height of the L-shaped steel plate.
[0008] The outer diameter of the locking rod is smaller than the inner diameter of the circular channel formed by the constraint rod, so that the locking rod can be easily inserted into the circular channel formed by the constraint rod. The locking rod is opened by the inner support rod, and the circular channel formed by the constraint rod is expanded in one direction, so that the two groups of constraint rods belonging to the two L-shaped steel plates generate tension and tighten the two L-shaped steel plates. Under the action of vertical load, the L-shaped steel plate will produce lateral deformation and tend to bulge outward. Under the restraint of the constraint rod, the locking rod and the inner support rod, the L-shaped steel plate is not easy to bulge out, which can not only restrain the internal concrete and improve its compressive strength, but also prevent the L-shaped steel plate from being separated from the internal concrete to ensure integrity. At the same time, the constraint rod and the internal concrete also become the lateral support of the L-shaped steel plate, improving its stable bearing capacity. The number of constraint rods at the same height can be determined according to the limb length of the L-shaped steel plate, that is, according to the inner side length of the L-shaped steel plate. If the length is large, more constraint rods can be set, which can enhance the restraint effect on the internal concrete. Applying pre-tension to the constraint rod can make the constraint rod play a role at the initial stage of loading.
[0009] The construction method of the reinforced restrained rectangular steel tube concrete column of the present invention is as follows: bending a steel plate into an L-shaped steel plate, bending a round steel or a flat steel into a U-shaped restraining rod, and welding the restraining rod on the L-shaped steel plate; assembling two L-shaped steel plates into a rectangle, and welding a fillet weld at the joint; assembling two parts of a locking rod into a circular cross-section, making the horizontal joint seam of the locking rod perpendicular to the straight section of the restraining rod, and inserting the locking rod into the circular channel formed by the restraining rod; threading one end of an inner support rod into a straight thread head, screwing a traction rod onto the straight thread head of the inner support rod, passing the traction rod into the channel of the locking rod, and passing it out from the other end, fixing the locking rod and pulling the traction rod, so that the inner support rod passes into the channel of the locking rod, the inner support rod opens the locking rod to apply pre-tensioning force to the restraining rod, and then unscrewing the traction rod; pouring concrete in the rectangular steel tube formed by the two L-shaped steel plates.
[0010] The traction rod is composed of a round rod and a connector, the round rod and the connector are welded, one end of the connector is truncated cone, and smoothly transitions with the round rod, and the other end of the connector has a cylindrical hole inside, and the hole has an internal thread. The diameter of the internal thread is equal to the diameter of the straight thread on the inner support rod. The diameter of the round rod is smaller than the minimum size of the non-circular hole inside the locking rod, and the round rod can be easily inserted into the locking rod.
[0011] The reinforced constrained rectangular steel tube concrete column of the present invention strengthens the connection between the two L-shaped steel plates and between the L-shaped steel plate and the internal concrete through the restraining rod, the locking rod and the inner support rod, so that the L-shaped steel plate and the internal concrete can work together better, and the restraining effect of the L-shaped steel plate on the internal concrete is enhanced, the compressive strength of the internal concrete is improved, and at the same time, the L-shaped steel plate has lateral support, which limits the outward bulging of the L-shaped steel plate and improves the stable bearing capacity. The construction method can realize the application of pre-tensioning force in the restraining rod, ensuring that the restraining rod can play a role in the initial stage of loading, and ensuring the force-bearing performance of the column. The reinforced constrained rectangular steel tube concrete column of the present invention has the advantages of good force-bearing performance, high bearing capacity and convenient construction, and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention is further described below in conjunction with the accompanying drawings.
[0013] Figure 1 It is a cross-sectional view of the reinforced restrained rectangular steel tube concrete column of the present invention.
[0014] Figure 2 It is a perspective axonometric drawing of the reinforced restrained rectangular steel tube concrete column of the present invention.
[0015] Figure 3 is a top view of the restraining rod of the present invention.
[0016] Figure 4 It is a cross-sectional view of the locking lever of the present invention.
[0017] Figure 5 It is a side view of the inner support rod of the present invention.
[0018] Figure 6 It is a combined cross-sectional view of the locking rod and the inner support rod of the present invention.
[0019] Figure 7 It is a construction process diagram of the reinforced constrained rectangular steel tube concrete column of the present invention.
[0020] Figure 8 is a side view of a drawbar according to the present invention.
[0021] In the figure: 1—L-shaped steel plate, 2—restraint rod, 3—locking rod, 4—inner support rod, 5—concrete, 6—corner weld, 7—traction rod, 21—straight section, 22—semicircle arc, 41—straight thread head, 71—round rod, 72—connecting head. DETAILED DESCRIPTION
[0022] like Figure 1 , Figure 2As shown, a reinforced restrained rectangular steel tube concrete column is composed of an L-shaped steel plate (1), a restraining rod (2), a locking rod (3), an inner support rod (4) and concrete (5); the restraining rod (2), the locking rod (3) and the inner support rod (4) are all steel components; two L-shaped steel plates (1) are spliced to form a rectangular steel tube, and the splicing position is connected by a fillet weld (6); the restraining rod (2) is welded to the two inner side surfaces of the L-shaped steel plate (1), and the restraining rod (2) is evenly arranged along the height direction of the L-shaped steel plate (1); the heights of the restraining rods (2) on the two inner side surfaces of the L-shaped steel plate (1) are different, and the number of restraining rods (2) at the same height is determined according to the length of the limbs of the L-shaped steel plate (1) and the design requirements, and is at least one, and the same number of restraining rods (2) on the long limb of the L-shaped steel plate (1) is 1. There are two restraining rods (2) at one height, and one restraining rod (2) at the same height on the short limb, and the vertical spacing of the restraining rods (2) is determined according to the design; the restraining rods (2) on the two L-shaped steel plates (1) have different heights, and the restraining rods (2) do not collide with each other. When the two L-shaped steel plates (1) are spliced into a rectangular steel pipe, a circular channel is formed between two groups of restraining rods (2) at the same horizontal position; the locking rod (3) is located in the circular channel formed by the restraining rods (2), and the outer diameter of the locking rod (3) is smaller than the inner diameter of the circular channel; the inner support rod (4) is located in the channel of the locking rod (3), and the inner support rod (4) supports the locking rod (3) to apply a pre-tensioning force to the restraining rod (2); and the rectangular steel pipe formed by the two L-shaped steel plates (1) is filled with concrete (5).
[0023] like Figure 3 As shown, the restraining rod (2) is U-shaped and consists of a straight section (21) and a semicircular arc (22).
[0024] like Figure 4 As shown, the locking rod (3) is composed of two identical parts, each of which has a semicircular cross section with an arc-shaped groove in the middle. When the two parts of the locking rod (3) are buckled together, the cross section is circular, and a non-circular channel is formed inside.
[0025] like Figure 5 As shown, the cross section of the inner support rod (4) is circular, and one end has a straight thread head (41).
[0026] like Figure 6 As shown, the inner support rod (4) is located in the hole inside the locking rod (3), and the inner support rod (4) opens the locking rod (3), so that the two parts of the locking rod (3) are separated by a distance, and the locking rod (3) is expanded in one direction.
[0027] like Figure 7 As shown in the figure, the construction process of the reinforced restrained rectangular steel tube concrete column is: Figure 7 As shown in (a), a steel plate is bent into an L-shaped steel plate (1), a round steel or a flat steel is bent into a U-shaped restraining rod (2), and the restraining rod (2) is welded on the L-shaped steel plate (1); Figure 7As shown in (b), two L-shaped steel plates (1) are assembled into a rectangle, and a fillet weld (6) is welded at the joint; Figure 7 As shown in (c), the two parts of the locking rod (3) are assembled into a circular cross section, so that the horizontal joint of the locking rod (3) is perpendicular to the straight section (21) of the restraining rod (2), and the locking rod (3) is inserted into the circular channel formed by the restraining rod (2); Figure 7 As shown in (d), one end of the inner support rod (4) is threaded into a straight thread head (41), the traction rod (7) is screwed onto the straight thread head of the inner support rod (4), the traction rod (7) is inserted into the hole of the locking rod (3), and then passed out from the other end, the locking rod (3) is fixed and the traction rod (7) is pulled, so that the inner support rod (4) passes into the hole of the locking rod (3), the inner support rod (4) opens the locking rod (3) to apply a pre-tensioning force to the restraining rod (2), and the traction rod (7) is unscrewed; Figure 7 As shown in (e), concrete (5) is poured into the rectangular steel tube formed by two L-shaped steel plates (1).
[0028] like Figure 8 As shown, the traction rod (7) is composed of a round rod (71) and a connecting head (72), the round rod (71) and the connecting head (72) are welded, one end of the connecting head (72) is truncated cone-shaped, and smoothly transitions with the round rod (71), and the other end of the connecting head (72) has a cylindrical hole inside, and the hole has an internal thread, and the diameter of the internal thread is equal to the diameter of the straight thread on the inner support rod.
Claims
1. A reinforced restrained rectangular steel tube concrete column, consisting of an L-shaped steel plate, a restraining rod, a locking rod, an inner support rod and concrete, characterized in that: Two L-shaped steel plates are spliced to form a rectangular steel tube, and the splicing position is connected by fillet welds; the restraint rods are welded on the two inner sides of the L-shaped steel plate, and the restraint rods are evenly arranged along the height direction of the L-shaped steel plate. The restraint rods are U-shaped and consist of straight sections and semicircular arcs. The restraint rods welded on the long limbs of the L-shaped steel plate have a straight section length equal to half the length of the short limbs of the L-shaped steel plate, and the restraint rods welded on the short limbs of the L-shaped steel plate have a straight section length equal to half the length of the long limbs of the L-shaped steel plate; when two L-shaped steel plates are spliced into a rectangular steel tube, The restraining rods on the four inner sides have different heights, and two groups of semicircular arcs with the same horizontal projection position form a circular channel; the locking rod is located in the circular channel formed by the restraining rod, and the outer diameter of the locking rod is smaller than the inner diameter of the circular channel; the inner support rod is located in the channel inside the locking rod, and the inner support rod opens the locking rod, so that the two parts of the locking rod are separated by a distance, and the locking rod is expanded in one direction, thereby applying pre-tension to the restraining rod; the length of the locking rod is equal to the height of the L-shaped steel plate; the rectangular steel tube formed by the two L-shaped steel plates is filled with concrete.
2. The reinforced restrained rectangular steel tube concrete column according to claim 1 is characterized in that: The locking rod is composed of two identical parts, each of which has a semicircular cross section with an arc-shaped groove in the middle. When the two parts of the locking rod are buckled together, the cross section is circular, and a non-circular channel is formed inside.
3. A construction method for realizing the reinforced restrained rectangular steel tube concrete column according to claim 2, characterized in that: Bend the steel plate into an L-shaped steel plate, bend the round steel or flat steel into a U-shaped constraint rod, and weld the constraint rod on the L-shaped steel plate; assemble two L-shaped steel plates into a rectangle, and weld a fillet weld at the joint; assemble the two parts of the locking rod into a circular section, make the horizontal joint seam of the locking rod perpendicular to the straight section of the constraint rod, and insert the locking rod into the circular channel formed by the constraint rod; thread one end of the inner support rod into a straight thread head, screw the traction rod onto the straight thread head of the inner support rod, pass the traction rod into the channel of the locking rod, and pass it out from the other end, fix the locking rod and pull the traction rod to make the inner support rod pass into the channel of the locking rod, the inner support rod opens the locking rod to apply pre-tension to the constraint rod, and unscrew the traction rod; pour concrete in the rectangular steel pipe formed by the two L-shaped steel plates.