CN206601297U - Assembled special-shaped column structure loading device - Google Patents

Abstract

The utility model relates to an assembled special-shaped column structure loading device, comprising: a left door frame, a right door frame, a pressure beam, a column support, a lateral support, an actuator loading head, a rolling friction support, and a special-shaped collection Displacement gauge for column displacement and beam end fixing device for special-shaped columns; the left door frame is parallel to the right door frame; the door frame includes door frame beams and door frame columns; both ends of the pressure beam are connected to the door frame by bolts The beams are connected; one end of the actuator loading head is connected to the actuator and the other end is connected to the special-shaped column; the displacement gauge is fixed on the vertical column connected to the pedestal; the gantry beam is fixed on the pedestal; the column support is fixed on the pedestal. The loading device of the assembled special-shaped column structure of the utility model is easy to operate and easy to install, and can carry out loading tests on L-shaped, T-shaped and cross-shaped assembled special-shaped columns with different cross-sections; the test data is accurate and the measurement precision is high.

Description

Assembled special-shaped column structure loading device

technical field

The utility model relates to a loading test of an assembled steel pipe concrete special-shaped column, in particular to a loading device for an assembled special-shaped column structure.

Background technique

In the prefabricated concrete-filled steel tube special-shaped column structure, the mechanical performance of the joints and column joints directly determines the overall performance of the structure. Therefore, joints and joints with reasonable stress and convenient construction are the key to the design of prefabricated concrete structures and determine the structural form. An important factor affecting the promotion and application. The prefabricated special-shaped column structure refers to the structural form in which the special-shaped column is prefabricated in a factory and transported to the construction site for assembly. The prefabrication rate of this structural system is high, but the connection structure of the joints is relatively complicated and the construction is difficult. It is difficult to ensure that it is completely equivalent to the cast-in-place special-shaped column structure. More structural seismic tests are needed to verify the reliability of its structure. Therefore, in order to better carry out the seismic performance test of prefabricated CFST special-shaped column joints, a simple, convenient and effective special-shaped column test loading device is needed.

Utility model content

Aiming at the deficiencies in the above-mentioned prior art, the utility model provides an assembled special-shaped column structure loading device that ensures the smooth progress of the test of the concrete-filled steel tube special-shaped column, has a simple structure and is convenient to install.

The technical scheme that the utility model takes is:

An assembled special-shaped column structure loading device, including: a left door frame, a right door frame, a pressure beam, a column support, a lateral support, an actuator loading head, a rolling friction support, and a device for collecting the displacement of the special-shaped column Beam end fixtures for displacement gauges and special-shaped columns;

The left mast is parallel to the right mast;

The gantry includes a gantry beam and a gantry column;

Both ends of the pressure beam are connected with the mast beam by bolts;

The upper surface of both ends of the pressure beam is in contact with the lower surface of the mast beam;

The pressure beam is perpendicular to the left mast and the right mast;

The pressure beam is located in the middle of the left mast beam and the right mast beam;

There is a rolling friction support under the pressure beam;

One end of the actuator loading head is connected to the actuator and the other end is connected to the special-shaped cylinder; the displacement gauge is fixed on the column connected to the pedestal;

The lower end of the column of the special-shaped column is arranged on the column support; the column support includes a column shoe and a column support bottom plate connected with the column shoe;

A jack is arranged under the rolling friction support;

The base of the jack is in contact with the top of the column of the heterosexual column;

The top of the jack is in contact with the lower surface of the rolling friction bearing;

The gantry beam is fixed on the pedestal; the column support is fixed on the pedestal.

The two ends of the column are fixed, the upper end of the column is connected with the pressure beam, and the lower end of the column is connected with the pedestal; three displacement meters are arranged to collect the displacements at the top, center and foot of the column of the opposite sex respectively.

The beam end fixing device of the special-shaped column includes a beam support base, tension and pressure sensors, upper and lower connecting joints, upper and lower fastening screws, and two connecting plates;

The beam support base is connected to the lower connector through the hinge shaft I;

The beam ends are clamped with upper and lower connecting plates and four screws;

The upper connecting head is connected with the lower connecting plate through the hinge shaft I;

The tension and pressure sensor is connected with the upper and lower connectors through the upper and lower connecting fastening screws;

The upper and lower connecting fastening screws are provided with positive and negative buckles to better adjust the tightness of the tension and compression sensors and avoid the force on the beam end before loading;

The rolling friction bearing includes a cylindrical roller, a sliding plate and a fixed plate;

The fixed plate is connected with the pressure beam through the screw;

The sliding plate is suspended on the fixed plate through the bearing II;

Cylindrical rollers are arranged between the sliding plate and the fixed plate.

The square steel pipe in the lateral support is welded to the oblique support, and the oblique support is fixed on the left door frame and the right door frame by screws;

The rolling bearing supporting the front end laterally abuts on the side of the special-shaped cylinder;

The lateral supports include lateral adjustment components, lateral reinforcement plates, square steel pipes and diagonal supports.

The lateral reinforcement plates are two 15mm thick iron plates, which are used to strengthen the strength and rigidity of the lateral support, provide sufficient lateral support for the special-shaped column, and prevent the special-shaped column from tilting.

The lateral adjustment assembly of the lateral support is composed of a bearing positioning plate, reinforcing steel bars, and bearings. The bearing II is fixed through the bearing positioning plate. The bearing positioning plate is connected with the long adjustment plate. Two adjustment holes are set on the long adjustment plate. The lateral adjustment assembly Sliding freely on the fixed long board, adjust the stretching amount by adjusting the expansion and contraction of the components laterally, so as to adapt to various sizes of special-shaped columns.

The actuator loading head is composed of front steel plate, rear steel plate, connecting plate, stiffener I, stiffener II and 4 screws;

The thickness of the steel plate is 30mm, and the diameter of the screw rod is 42mm.

The front steel plate and the rear steel plate are welded and connected through stiffeners, the front steel plate is connected to the actuator, and the rear steel plate is connected to the connecting plate through a screw, which clamps the special-shaped column to apply horizontal thrust and pull through the actuator.

The gantry column is spliced by two welded panels in the middle of the channel steel, and the hole in the middle of the channel steel is used to connect the gantry beam;

The base of the mast is welded by steel plates, with symmetrical openings on both sides of the base, and is fixed on the pedestal by bolts;

The gantry beam is welded by steel plates, and the two ends of the beam are opened and connected to the gantry column with bolts.

An assembled special-shaped column test method of a prefabricated special-shaped column structure loading device, comprising the following steps:

a. According to the design height of the special-shaped column, adjust the position of the actuator so that the actuator and the loading end of the special-shaped column are at the same level; assemble the left door frame, right door frame and pressure beam, and adjust the position of the pressure beam so that the special-shaped The column is directly below the pressure beam; install the rolling friction support to fix the rolling friction support and the pressure beam, and adjust the position of the rolling friction support so that the centroid of the rolling friction support and the special-shaped cylinder is coaxial;

b. According to the design size of the special-shaped column, adjust the position of the column and the column support base plate and the beam support base. The column support base plate and the beam support base are fixed on the pedestal with screws; Adjust the adjusting nut to make the special-shaped column reach the designated position, and tighten the adjusting nut to fix the special-shaped column; install the beam end fixing device of the special-shaped column, and after the special-shaped column is fastened, connect the tension and pressure sensor and the beam support base using the hinge shaft and Fasten the screw connection, adjust the upper and lower fastening screws, so that the beam end is in a state of small tensile stress, so as to ensure the stability of the special-shaped column;

c. Fix the lateral support, adjust the adjustment assembly so that the rolling bearing bears against the side of the special-shaped column floor; assemble the special-shaped column and the actuator connecting plate, and tighten the screw so that the actuator and the special-shaped column are tightly connected to provide horizontal load; installation The jack at the top of the special-shaped column makes the axis of the jack at the centroid of the special-shaped column to provide the axial force of the special-shaped column; fix the displacement gauge to support the column, and adjust the positions of the three displacement gauges to measure the top of the special-shaped column , Displacement values at the center of the column and at the foot of the column.

d. During the loading process, the axial force is first applied through the jack to simulate the self-weight of the superstructure; the horizontal thrust and tension are applied through the actuator, and the relative displacement between the top and bottom of the special-shaped column is measured by the displacement meter to obtain the force-displacement of the top of the column Curve to draw the hysteretic curve and skeleton curve of the special-shaped column to reflect the seismic and energy dissipation performance of the special-shaped column; through the displacement values of the column top, column center and column foot, the interstory displacement angle of the special-shaped column can be obtained , and calculate the ductility coefficient of the special-shaped cylinder to evaluate the ductility of the special-shaped cylinder.

The utility model has the beneficial effects relative to the prior art:

The utility model has an assembled special-shaped column structure loading device, which is easy to operate and easy to install, and can carry out loading tests on L-shaped, T-shaped and cross-shaped special-shaped columns with different cross-sections; the test data is accurate and the measurement precision is high.

Description of drawings

Fig. 1 is the front view of the loading device of the assembled special-shaped column structure of the utility model;

Fig. 2 is a side view of the loading device of the assembled special-shaped column structure of the utility model;

Fig. 3 is a top view of the loading device of the assembled special-shaped column structure of the utility model;

Fig. 4 is the front view of the column support of the utility model assembly type special-shaped column structure loading device;

Fig. 5 is a side view of the column support of the utility model assembly type special-shaped column structure loading device;

Fig. 6 is a front view of the beam support of the utility model assembly type special-shaped column structure loading device;

Fig. 7 is a side view of the beam support of the utility model assembly type special-shaped column structure loading device;

Fig. 8 is a schematic diagram of the rolling friction support device of the assembly type special-shaped column structure loading device of the utility model;

Fig. 9 is a structural schematic diagram of the lateral support of the assembly-type special-shaped column structure loading device of the present invention;

Fig. 10 is a schematic cross-sectional view of 1-1 in Fig. 9;

Fig. 11 is a structural schematic diagram of the actuator loading head of the assembly-type special-shaped column structure loading device of the present invention.

Explanation of symbols of main components in the accompanying drawings:

1. Left door frame 2, right door frame 3, pressure beam 4, column shoe 5, column support base plate 6, beam support base 7, hinge shaft I 8, tension and pressure sensor 9, actuator loading head 10, hinge Axis II 11, rolling friction support 12, lateral support 13, actuator 14, jack 15, special-shaped cylinder 16, reaction wall 17, pedestal 18, lower connection head 19, lower connection fastening screw 20, upper connection Tightening screw 21, upper connecting head 22, lower connecting plate 23, upper connecting plate 24, adjusting nut 25, column 26, displacement gauge 27, square steel pipe 28, lateral reinforcing plate 29, adjusting assembly 30, cylindrical roller 31, Sliding plate 32, fixed plate 33, bearing I, 34, bearing 35, bearing positioning plate 36, fixed long plate 37, adjustment hole 38, oblique support 39, reinforced steel bar 40, adjustable long plate 41, front steel plate 42, rear steel plate 43 , connecting plate 44, stiffener Ⅰ 45, stiffener Ⅱ

46, screw rod.

detailed description

The utility model is described in detail below with reference to accompanying drawing and embodiment:

As can be seen from accompanying drawings 1-11, an assembled special-shaped column structure loading device,

Including: left gantry 1, right gantry 2, pressure beam 3, column support, lateral support 12, actuator loading head 9, rolling friction support 11, displacement gauge 26 for collecting the displacement of special-shaped column 15 and beam end fixtures for special-shaped columns;

The left door frame 1 is parallel to the right door frame 2;

The door frame includes a door frame beam and a door frame column; the door frame is in the shape of a door;

The two ends of the pressure beam 3 are connected with the portal beam by bolts;

The upper surfaces of the two ends of the pressure beam 3 are attached to the lower surface of the gantry beam;

The pressure beam 3 is perpendicular to the left mast 1 and the right mast 2; the pressure beam 3 is perpendicular to the left mast beam and the right mast beam;

The pressure beam 3 is located in the middle of the left mast beam and the right mast beam;

A rolling friction support 11 is arranged under the pressure beam 3;

The rolling friction support 11 is connected with the pressure beam 3 through bolts, and the position of the rolling friction support 11 on the pressure beam is adjustable;

One end of the actuator loading head 9 is connected to the actuator 13 and the other end is connected to the special-shaped column body 15; thus, the loading on the structural member of the special-shaped column is realized.

Displacement gauge 26 is fixed on the column 25 that links to each other with pedestal 17;

The lower end of the column of the special-shaped column 15 is arranged on the column support; the column support includes a column shoe 4 and a column support bottom plate 5 connected with the column shoe 4;

A jack 14 is arranged under the rolling friction support 11;

The base of the jack 14 is in contact with the top of the column 25 of the heterosexual column 15;

The top of the jack 14 is in contact with the lower surface of the rolling friction bearing.

The gantry beam is fixed on the pedestal 17; the column support is fixed on the pedestal 17.

The two ends of the column 25 are fixed, the upper end of the column is connected with the pressure beam, and the lower end of the column is connected with the pedestal; three displacement meters 26 are arranged to collect displacements at the column top, the center of the column and the column foot of the special-shaped column 15 respectively.

As shown in Figure 1, Figure 2, Figure 6 and Figure 7,

The beam end fixing device of special-shaped column comprises beam support base 6, tension and pressure sensor 8, lower connector 18, upper connector 21, lower connection fastening screw 19, upper connection fastening screw 20, and upper connecting plate 23 and lower connecting plate 22;

The beam support base 6 is connected to the lower connector 18 through the hinge shaft I7;

The beam end is clamped with upper connecting plate 23, lower connecting plate 22 and four screw rods;

The upper connecting head 21 is connected with the lower connecting plate 22 through the hinge shaft I7;

The tension and pressure sensor 8 is connected to the lower connector 18 and the upper connector 21 through the lower connecting fastening screw 19 and the upper connecting fastening screw 20;

Both the lower connection fastening screw 19 and the upper connection fastening screw 20 are provided with positive and negative buckles to better adjust the tightness of the tension and compression sensors and avoid loading the beam end before loading;

As shown in Figure 1, Figure 8 and Figure 10,

The rolling friction support 11 includes a roller 30, a sliding plate 31 and a fixed plate 32;

The fixed plate 32 is connected with the pressure beam 3 through a screw;

The sliding plate 31 is suspended on the fixed plate 32 through the bearing I33;

A cylindrical roller 30 is arranged between the sliding plate 31 and the fixing plate 32, and the sliding plate 31 can slide along with the special-shaped cylinder 15 during loading.

The lateral supports are fixed symmetrically to the mast columns. Lateral support 12 utilizes screw rod to be fixed on the door frame.

Square steel pipe 27 in described lateral support 12 is welded with oblique support 38, and oblique support 38 utilizes screw rod to be fixed on the left door frame 1 and the right side door frame 2;

The rolling bearing 34 supporting the front end laterally abuts on the side of the special-shaped cylinder 15;

The lateral support 12 includes a lateral adjustment assembly 29 , a lateral reinforcing plate 28 , a square steel pipe 27 and an oblique support 38 .

Lateral reinforcing plate 28 is two 15mm thick iron plates, and its effect is to strengthen the strength and rigidity of lateral support 12, provides enough large lateral support force for special-shaped column 15, prevents the roll of special-shaped column 15.

The lateral adjustment assembly 29 of the lateral support 12 is made up of a bearing positioning plate 35, a reinforcing steel bar 39, and a bearing 34, and the bearing 34 is fixed by the bearing positioning plate 35, and the bearing positioning plate 35 is connected with the adjusting long plate 40, and the adjusting long plate 40 With two adjustment holes 37, the entire set of adjustment components 29 can slide freely on the fixed long plate 36, and through the expansion and contraction of the lateral adjustment components 29, the extension can be adjusted to adapt to special-shaped cylinders of various sizes.

As shown in Figure 1, Figure 2, Figure 3 and Figure 11,

The actuator loading head 9 is composed of a front steel plate 41, a rear steel plate 42, a connecting plate 43, a stiffening rib I44, a stiffening rib II45 and four screw rods 46;

The thickness of the steel plate is 30mm, the diameter of the screw is 42mm,

The front steel plate 41 and the rear steel plate 42 are connected by welding through stiffeners 44, 45, the front steel plate 41 is connected with the actuator 13, and the rear steel plate 42 is connected with the connecting plate 43 through a screw rod 46, clamping the special-shaped cylinder 15, and Horizontal push and pull forces are applied by actuators 13 .

An assembled special-shaped column test method of a prefabricated special-shaped column structure loading device, comprising the following steps:

a. According to the design height of the special-shaped column 15, adjust the position of the actuator 13 so that the actuator 13 and the loading end of the special-shaped column 15 are at the same level; assemble the left door frame 1, the right door frame 2 and the pressure beam 3, and Adjust the position of the pressure beam 3 so that the special-shaped column 15 is directly below the pressure beam 3 to avoid bias; install the rolling friction support 11 to fix the rolling friction support 11 and the pressure beam 3, and adjust the rolling friction support 11 position, so that the centroids of the rolling friction bearing 11 and the special-shaped cylinder 13 are coaxial;

b. According to the design size of the special-shaped column 15, adjust the position of the compressed column and the column support base plate 5 and the beam support base 6. The column support base plate 5 and the beam support base 6 are fixed on the pedestal with screws; the column shoe 4 is installed and hoisted Special-shaped cylinder 15, adjust the adjustment nut 24 on the column shoe, make the special-shaped cylinder reach the designated position, and tighten the adjustment nut 24 to fix the special-shaped cylinder; install the beam end fixing device of the special-shaped cylinder, and tighten the special-shaped cylinder The tension and pressure sensor 8 is connected to the beam support base 6 by the hinge shaft 7 and the fastening screw 19, and the fastening screws 19, 20 are adjusted so that the beam end is in a state of less tensile stress, so as to ensure the stability of the special-shaped column;

c. Fix the lateral support 12, adjust the adjustment assembly so that the rolling bearing withstands the side of the special-shaped cylinder floor; assemble the special-shaped cylinder and the actuator connecting plate 43, and tighten the bolts so that the actuator 13 and the special-shaped cylinder 15 are tightly connected to provide Horizontal load; the jack 14 on the top of the special-shaped column is installed so that the axis of the jack 14 is at the position of the special-shaped column 15 to provide the axial force of the special-shaped column 15; position, to measure the displacement value at the column top, column center and column foot of special-shaped column 15.

d. During the loading process, the axial force is first applied through the jack 14 to simulate the self-weight of the superstructure; the horizontal thrust and pull are applied through the actuator 13, and the relative displacement between the top and the bottom of the special-shaped column 15 is measured through the displacement meter 26 to obtain the top of the column. The force-displacement curve of the special-shaped column is used to draw the hysteretic curve and skeleton curve of the special-shaped column to reflect the seismic and energy dissipation performance of the special-shaped column; through the displacement values of the column top, column center, and column foot, the special-shaped column can be obtained. Calculate the ductility coefficient of the special-shaped column to evaluate the ductility of the special-shaped column.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the structure of the present utility model in any form. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model all belong to the scope of the technical solutions of the present utility model.

Claims (9)

1. A prefabricated special-shaped column structure loading device, characterized in that, Including: left mast (1), right mast (2), pressure beam (3), column support, lateral support (12), actuator loading head (9), rolling friction support (11 ), collecting the displacement meter (26) of the displacement of the special-shaped cylinder (15) and the beam end fixture of the special-shaped cylinder; The left door frame (1) is parallel to the right door frame (2); The gantry includes a gantry beam and a gantry column; Both ends of the pressure beam (3) are connected with the portal beam by bolts; The upper surfaces of the two ends of the pressure beam (3) are attached to the lower surface of the gantry beam; The pressure beam (3) is perpendicular to the left door frame and the right door frame; The pressure beam (3) is located in the middle of the left mast beam and the right mast beam; A rolling friction support (11) is arranged under the pressure beam; One end of the actuator loading head (9) is connected to the actuator (13) and the other end is connected to the special-shaped cylinder (15); the displacement gauge (26) is fixed on the column (25) connected to the pedestal (17); The lower end of the column of the special-shaped column (15) is fixed on the column support; the column support includes a column shoe (4) and a column support bottom plate (5) connected with the column shoe (4); A jack (14) is arranged below the rolling friction support (11); The base of the jack (14) contacts the column top of the special-shaped cylinder (15); The top of the jack (14) is in contact with the lower surface of the rolling friction bearing (11). 2. The prefabricated special-shaped column structure loading device according to claim 1, characterized in that: the door frame is fixed on the pedestal (17); the column support is fixed on the pedestal (17). 3. The prefabricated special-shaped column structure loading device according to claim 1, characterized in that: the two ends of the column (25) are fixed, the upper end of the column is connected with the pressure beam (3), and the lower end of the column is connected with the pedestal (17) Three displacement gauges (26) are set to collect the displacements at the column top, column center and column foot of the heterosexual column (15) respectively. 4. The prefabricated special-shaped column structure loading device according to claim 1, characterized in that: the beam end fixing device of the special-shaped column comprises a beam support base (6), tension and pressure sensors (8), upper and lower connecting joints (18, 21 ), upper and lower fastening screws (19,20), and upper and lower connecting plates (23,22); The beam support base (6) is connected to the lower connector (18) through the hinge shaft I (7); The beam ends are clamped with upper and lower connecting plates (23, 22) and four screw rods; The upper connecting head (21) is connected with the lower connecting plate (22) through the hinge shaft I (7); The tension and pressure sensor (8) is connected to the upper and lower connectors (18, 21) through upper and lower connecting fastening screws (19, 20); The upper and lower connecting fastening screw rods (19, 20) are all provided with positive and negative buckles. 5. The prefabricated special-shaped column structure loading device according to claim 1, characterized in that: The rolling friction support (11) includes a roller (30), a sliding plate (31) and a fixed plate (32); Fixed plate (32) is connected with pressure beam (3) by screw rod; The sliding plate (31) is suspended on the fixed plate (32) through the bearing I (33); Cylindrical rollers (30) are arranged between the slide plate (31) and the fixed plate (32). 6. The prefabricated special-shaped column structure loading device according to claim 1, characterized in that: the square steel pipe (27) in the lateral support (12) is welded to the diagonal support (38), and the diagonal support (38) Utilize the screw rod to be fixed on the left door frame (1) and the right door frame (2); The rolling bearing of the lateral support front end abuts on the side of the special-shaped cylinder (15); The lateral support (12) includes a lateral adjustment assembly (29), a lateral reinforcement plate (28), a square steel pipe (27) and an oblique support (38). 7. The prefabricated special-shaped column structure loading device according to claim 6, characterized in that: The lateral adjustment component (29) of the lateral support (12) is composed of a bearing positioning plate (35), a reinforcing steel bar (39), and a bearing (34). The bearing (34) is fixed by the bearing positioning plate (35), and the bearing positioning plate (35) is connected with the adjustment long plate (40), and two adjustment holes (37) are set on the adjustment long plate (40). The lateral adjustment component (29) slides freely on the fixed long plate (36). The expansion and contraction of component (29) adjusts the stretching amount, to adapt to the special-shaped cylinders of various sizes. 8. The prefabricated special-shaped column structure loading device according to claim 1, characterized in that: Actuator loading head (9) is composed of front steel plate (41), rear steel plate (42), connecting plate (43), stiffener I (44), stiffener II (45) and 4 screws (46); The front steel plate (41) and the rear steel plate (42) are welded and connected through stiffeners (44, 45), the front steel plate (41) is connected to the actuator (13), the rear steel plate (42) is connected to the connecting plate (43) It is connected by a screw rod (46), clamping the special-shaped cylinder (15), so as to apply horizontal thrust and pull force through the actuator (13). 9. The prefabricated special-shaped column structure loading device according to claim 1, characterized in that: The gantry column is spliced by two welded panels in the middle of the channel steel, and the hole in the middle of the channel steel is used to connect the gantry beam; The base of the mast is welded by steel plates, with symmetrical openings on both sides of the base, and is fixed on the pedestal by bolts; The gantry beam is welded by steel plates, and the two ends of the beam are opened and connected to the gantry column with bolts.