CN114878191A - Test loading device and method for simulating complex load of large-span open-hole roof structure - Google Patents
Test loading device and method for simulating complex load of large-span open-hole roof structure Download PDFInfo
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- CN114878191A CN114878191A CN202111571487.5A CN202111571487A CN114878191A CN 114878191 A CN114878191 A CN 114878191A CN 202111571487 A CN202111571487 A CN 202111571487A CN 114878191 A CN114878191 A CN 114878191A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a test loading device and a method for simulating complex load of a large-span open hole roof structure, wherein the test loading device comprises the following steps: the roof structure comprises a roof structure and a rigid loading disc, the roof structure is placed on the first support, the rain and snow load loading unit comprises first weights, the first weights are hung on the lower surface of the roof structure, the wind load loading unit is movably installed on one side of the first support and comprises a guide structure, a second weight unit and a first connecting line, the second weight unit does free-fall movement and transmits impact force to the rigid loading disc through the first connecting line, the guide structure converts vertical impact force of the second weight unit into impact force in other directions, and the first displacement monitoring device and the second displacement monitoring device are used for monitoring vertical displacement of the roof structure and the rigid loading disc.
Description
Technical Field
The invention relates to the field of test devices, in particular to a test loading device and method for simulating complex load of a large-span open-pore roof structure.
Background
With the rapid development of domestic economic technology and the improvement of large-span spatial structure technology, the construction number of large-span structural buildings is rapidly increased in China. The large-span open structure building occupies a place in the large-span structure building due to the advantages of novel structure, graceful appearance, strong modern sense and the like, and the large-span open structure building is built in a plurality of cities to become landmark buildings of the cities. Due to the unique structural characteristics of the large-span open structure building, the structural response under the load action is different from the stress response of other closed structures. In addition, the wind load is one of the most main loads borne by the building, and under the wind load action of the large-span open structure building, the structural response research needs to be carried out after the wind load is jointly received from the inside and the outside, the upper part and the lower part of the structure, so that the stress research under the wind load action of the large-span open structure building is relatively complex.
The existing test loading device can not simulate the complex load of a large-span open structure under the combined action of rain and snow loads in different positions and sizes and wind loads in different directions and sizes.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a test loading device and a method for simulating complex loads of a large-span open roof structure, which can solve the problem that the conventional test loading device cannot simulate complex loads of a large-span open structure under the combined action of rain and snow loads at different positions and sizes and wind loads in different directions and sizes.
According to the embodiment of the first aspect of the invention, the test loading device for simulating the complex load of the large-span perforated roof structure comprises: a first bracket; the roof model comprises a roof structure and a rigid loading disc, the roof structure is placed on the first support, the roof structure is provided with an opening, the rigid loading disc is the same as the opening in shape, and the rigid loading disc is installed on the opening; the rain and snow load loading unit comprises first weights with adjustable positions, quantities and weights, and the first weights are hung on the lower surface of the roof structure to simulate rain and snow loads of different positions and sizes on the roof; the wind load loading unit is movably mounted on one side of the first support and comprises a guide structure, a second weight unit and a first connecting wire, one end of the first connecting wire is connected with the second weight unit, the other end of the first connecting wire is connected with the rigid loading disc, the second weight unit does free-falling body movement and transmits impact force to the rigid loading disc through the first connecting wire, the first connecting wire converts vertical impact force of the second weight unit into impact force in other directions through the guide structure, the number, weight and free-falling height difference of the second weight unit can be adjusted to simulate wind loads of different sizes borne by the roof, and the position of the guide structure can be adjusted to simulate wind loads of different directions borne by the roof; the first displacement monitoring device is used for monitoring the vertical displacement of the rigid loading disc under the action of rain and snow loads and wind loads; and the second displacement monitoring device is used for monitoring the vertical displacement of the roof structure under the action of rain and snow loads and wind loads.
The test loading device for simulating the complex load of the large-span open hole roof structure provided by the embodiment of the first aspect of the invention at least has the following technical effects: the embodiment of the invention simulates the roof to be subjected to rain and snow loads with different positions and sizes by installing the first weights with different quantities and weights at different positions on the lower surface of the roof structure, adjusting the position of the guide structure to ensure that a certain angle is formed between the first connecting wire and the rigid loading disc, simulating the roof to be subjected to wind loads with different directions, adjusting the quantity, weight and free falling height difference of the second weight units, simulating the wind loads with different sizes, which are received by the roof, wherein the first displacement monitoring device can monitor the vertical displacement of the rigid loading disc under the action of the rain and snow loads and the wind loads, the second displacement monitoring device can monitor the vertical displacement of the roof structure under the action of the rain and snow loads and the wind loads, can simulate the complex loads of the large-span open structure under the combined action of the rain and snow loads with different positions and sizes and the wind loads with different directions and sizes, and can be used for the verification test of the rationality of the design of the large-span open structure, the reasonability of stress response of the structure is rapidly verified, and reasonable data reference is provided for adjustment, optimization and the like of the large-span open structure design.
According to some embodiments of the invention, the guide structure comprises a second bracket, a fixed bracket, a first fixed pulley and a second fixed pulley, wherein one end of the bottom of the second bracket is provided with a roller, the other end of the bottom of the second bracket is arranged on the first bracket through a bolt, one side of the second bracket is provided with a vertical sliding groove, the fixed bracket is slidably arranged on the sliding groove, the first fixed pulley is arranged at the inner top of the second bracket, the second fixed pulley is arranged on the fixed bracket, one end of the first connecting wire is connected with the second weight unit, and the other end of the first connecting wire is connected with the rigid loading disc through the first fixed pulley and the second fixed pulley.
According to some embodiments of the invention, the second support is provided with a baffle capable of opening and closing and a control device, the second weight unit is placed on the baffle, and the control device is used for controlling the opening and closing of the baffle.
According to some embodiments of the present invention, the second weight unit includes a second weight and a tray, a through hole is formed in a center position of the second weight, and the first connecting line passes through the through hole and is connected to the tray.
According to some embodiments of the invention, the first weight is suspended on the lower surface of the roof structure by a second connecting line, the third fixed pulley is mounted on the first bracket, and the second connecting line is connected with the first weight by the third fixed pulley for adjusting the horizontal position of the first weight.
According to some embodiments of the invention, the edge of the opening is surrounded by a ring of mounting slots in which the rigid load plate is mounted.
According to some embodiments of the invention, the first support is a steel truss.
According to some embodiments of the invention, the first displacement monitoring device is a laser displacement meter mounted on the second support, the laser displacement meter being aligned with the centroid of the rigid load disk.
According to some embodiments of the present invention, the second displacement monitoring device is a light curtain displacement meter, the third support and the fourth support are respectively mounted on two sides of the first support, the transmitting end and the receiving end of the light curtain displacement meter are respectively mounted on the third support and the fourth support, a channel is arranged on the roof structure, and the radiation emitted from the transmitting end of the light curtain displacement meter reaches the receiving end of the light curtain displacement meter through the channel.
According to the embodiment of the second aspect of the invention, the test loading method for simulating the complex load of the large-span open pore roof structure by applying the test loading device for simulating the complex load of the large-span open pore roof structure comprises the following steps:
s100, manufacturing a roof structure according to the actual situation of the roof, manufacturing a rigid loading disc with the same shape as that of an opening on the roof, fixing the rigid loading disc on the opening of the roof structure, and placing the roof structure on a first support;
s200, determining the number, weight and mounting position of first weights according to the loading requirement in advance in the test, and hanging the first weights on the lower surface of the roof structure;
s300, adjusting the position of a second displacement monitoring device;
s400, fixing a guide structure on a first support;
s500, connecting one end of a first connecting wire with a rigid loading disc, connecting the other end of the first connecting wire with a second weight unit, adjusting the number, the weight and the free falling height difference of the second weight unit, and adjusting a guide structure to enable an included angle between the first connecting wire and the rigid loading disc to be an angle required by a test;
s600, mounting a first displacement monitoring device, wherein the first displacement monitoring device is aligned to the centroid of the rigid loading disc;
s700, enabling the second weight unit to freely fall to form impact force, and completing loading.
The method for applying the test loading device for simulating the complex load of the large-span open roof structure according to the embodiment of the second aspect of the invention has at least the following technical effects: the embodiment of the invention simulates the roof to be subjected to rain and snow loads with different positions and sizes by installing the first weights with different quantities and weights at different positions on the lower surface of the roof structure, adjusting the position of the guide structure to ensure that a certain angle is formed between the first connecting wire and the rigid loading disc, simulating the roof to be subjected to wind loads with different directions, adjusting the quantity, weight and free falling height difference of the second weight units, simulating the wind loads with different sizes, which are received by the roof, wherein the first displacement monitoring device can monitor the vertical displacement of the rigid loading disc under the action of the rain and snow loads and the wind loads, the second displacement monitoring device can monitor the vertical displacement of the roof structure under the action of the rain and snow loads and the wind loads, can simulate the complex loads of the large-span open structure under the combined action of the rain and snow loads with different positions and sizes and the wind loads with different directions and sizes, and can be used for the verification test of the rationality of the design of the large-span open structure, the reasonability of stress response of the structure is rapidly verified, and reasonable data reference is provided for adjustment, optimization and the like of the large-span open structure design.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural diagram b of the present invention;
fig. 3 is a partially enlarged view of fig. 1.
Reference numerals are as follows:
a first bracket 100,
A first weight 300, a second connecting line 310, a third fixed pulley 320,
A guiding structure 400, a second weight 410, a tray 420, a first connecting line 430, a second bracket 440, a fixed frame 450, a first fixed pulley 460, a second fixed pulley 470, a baffle 480, a control device 490,
A first displacement monitoring device 500, a second displacement monitoring device 510,
A third bracket 600, a fourth bracket 610.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the present number, and larger, smaller, inner, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
A test loading device for simulating complex loads of a large-span open-pore roof structure according to an embodiment of the first aspect of the invention is described below with reference to fig. 1 to 3.
As shown in fig. 1, the test loading device for simulating the complex load of the large-span open-pore roof structure according to the embodiment of the first aspect of the invention comprises: the roof structure comprises a first support 100, a roof model, a rain and snow load loading unit, a wind load loading unit, a first displacement monitoring device 500 and a second displacement monitoring device 510, wherein the roof model comprises a roof structure 200 and a rigid loading disc 210, a bearing plate is installed at the outer top of the first support 100, the roof structure 200 is placed on the bearing plate of the first support 100, the first support 100 is a steel truss, holes are formed in the roof structure 200, a circle of mounting groove is formed in the edge of each hole in a surrounding mode, the rigid loading disc 210 is installed in the mounting groove, the rigid loading disc 210 is identical to the holes in shape, and when a load is applied, the actual stress condition of the roof can be better simulated.
As shown in fig. 1, the rain and snow load loading unit includes first weights 300 with adjustable positions, quantities and weights, the first weights 300 are suspended on the lower surface of the roof structure 200, the simulated roof receives rain and snow loads of different positions and sizes, the wind load loading unit is movably mounted on one side of the first support 100, the wind load loading unit includes a guide structure 400, a second weight unit and a first connection line 430, one end of the first connection line 430 is connected with the second weight unit, the other end of the first connection line 430 is connected with the rigid loading disc 210, the second weight unit does free-fall movement and transmits impact force to the rigid loading disc 210 through the first connection line 430, and the guide structure 400 can convert the vertical impact force of the second weight unit into impact force in other directions.
As shown in fig. 1, the first displacement monitoring device 500 can monitor the vertical displacement of the rigid loading disc 210 under the action of rain, snow and wind loads, the second displacement monitoring device 510 can monitor the vertical displacement of the roof structure 200 under the action of rain, snow and wind loads, different quantities and the first weight 300 of weight are installed to the different positions of lower surface at roof structure 200, the simulation roof receives the sleet load of different positions and size, the position of adjustment guide structure 400, it is certain angle to make to be between first connecting line 430 and the rigidity loading dish 210, can simulate the roof and receive the wind load of equidirectional, the quantity of adjustment second weight unit, weight and the difference in height that freely falls, can simulate the wind load of equidimension not that the roof received, can simulate large-span open structure and receive different positions, the sleet load of size and different directions, the complicated load of wind load under the combined action of size.
As shown in fig. 1 and 3, the guide structure 400 includes a second bracket 440, a fixed bracket 450, a first fixed pulley 460, and a second fixed pulley 470, a roller is installed at one end of the bottom of the second bracket 440, the other end of the bottom of the second bracket 440 is installed on the first bracket 100 through a bolt, the installation position of the second bracket 440 on the first bracket 100 is adjusted, the second bracket 440 rotates around the bolt through the roller and can change the horizontal angle between the first connection line 430 and the rigid loading tray 210, a vertical sliding groove is formed at one side of the second bracket 440, the fixed bracket 450 is slidably installed on the sliding groove, the first fixed pulley 460 is installed at the inner top of the second bracket 440, the second fixed pulley 470 is installed on the fixed bracket 450, one end of the first connection line 430 is connected to the second weight unit, the other end of the first connection line 430 is connected to the rigid loading tray 210 through the first fixed pulley 460 and the second fixed pulley 470, the fixing bracket 450 slides up and down in the sliding groove, and can change the vertical angle between the first connecting line 430 and the rigid loading plate 210.
As shown in fig. 3, the second bracket 440 is provided with a shutter 480 and a control device 490, the control device 490 is a control valve, the second weight unit is placed on the shutter 480, the control valve controls the opening and closing of the shutter 480, the control valve is rotated, the shutter 480 is opened, and the second weight unit performs free-fall movement.
As shown in fig. 1, the second weight unit includes a second weight 410 and a tray 420, a through hole is formed in the center of the second weight 410, one end of a first connecting line 430 passes through the through hole and is connected to the tray 420, a first stud is installed on the rigid loading tray 210, the other end of the first connecting line 430 is connected to the rigid loading tray 210 through the first stud, the second weight 410 performs free-fall motion to impact the tray 420, the tray 420 holds the second weight 410 and transmits an impact force to the rigid loading tray 210, and the distance between the tray 420 and the bottom surface of the second weight 410 is adjusted to adjust the height difference of the free-fall motion of the second weight 410, thereby changing the size of the impact force.
As shown in fig. 1, a second stud is installed on the lower surface of the roof structure 200, the first weight 300 is connected to the second stud through a second connecting line 310, and is suspended on the lower surface of the roof structure 200, a third fixed pulley 320 is installed on the first support 100, the second connecting line 310 moves the first weight 300 to a position close to the bottom surface and the side surface of the first support 100 through the third fixed pulley 320, so as to prevent the first weight 300 from colliding with the first support 100, and when the roof structure 200 is damaged, the first weight 300 can safely land.
As shown in fig. 3, the first displacement monitoring device 500 is a laser displacement meter, the laser displacement meter is mounted on the second bracket 440, the laser displacement meter is aligned with the centroid of the rigid loading disc 210 and can measure the vertical displacement value of the rigid loading disc 210, and when the vertical displacement value of the rigid loading disc 210 exceeds a preset threshold value, the laser displacement meter gives an alarm.
As shown in fig. 1 to 2, the second displacement monitoring device 510 is a light curtain displacement meter, the third support 600 and the fourth support 610 are respectively installed on two sides of the first support 100, the transmitting end and the receiving end of the light curtain displacement meter are respectively installed on the third support 600 and the fourth support 610, the installation positions of the light curtain displacement meter on the third support 600 and the fourth support 610 are adjusted according to a preset threshold, a channel is arranged on the roof structure 200, the radiation emitted from the transmitting end of the light curtain displacement meter reaches the receiving end of the light curtain displacement meter through the channel, when the vertical displacement of the roof structure 200 exceeds the preset threshold, the edge of the roof structure 200 blocks the radiation emitted from the transmitting end of the light curtain displacement meter, and the receiving end of the light curtain displacement meter does not receive the radiation and gives an alarm.
The following describes a test loading method for simulating the complex load of the large-span open-pore roof structure, which applies the test loading device for simulating the complex load of the large-span open-pore roof structure according to the second aspect of the invention.
A test loading method for simulating the complex load of the large-span open pore roof structure by applying the test loading device for simulating the complex load of the large-span open pore roof structure comprises the following steps:
s100, manufacturing a roof structure 200 according to the actual situation of a roof, manufacturing a rigid loading disc 210 with the same shape as that of an opening on the roof, fixing the rigid loading disc 210 on an installation groove with the opening of the roof structure 200, and placing the roof structure 200 on the first support 100;
s200, mounting second bolts at different positions of the lower surface of the roof structure 200 according to loading requirements of a test, hanging a certain number and weight of first weights 300 on the second bolts, and moving the first weights 300 to positions close to the bottom surface and the side surfaces of the first support 100 through a first connecting line 310 and a third fixed pulley 320;
s300, adjusting the position of the light curtain displacement meter according to a preset threshold value;
s400, fixing the guide structure 400 on the first support 100;
s500, placing the second weight 410 on the baffle 480, connecting one end of the first connecting line 430 with the rigid loading disc 210, connecting the other end of the first connecting line 430 with the tray 420 through a through hole at the center of the second weight 410, adjusting the number, weight and distance between the bottom surface of the second weight 410 and the tray 420 according to the loading requirement of the test, adjusting the position of the guide structure 400 to make the horizontal direction angle between the first connecting line 430 and the rigid loading disc 210 30 degrees, adjusting the height of the fixing frame 450 to make the vertical direction angle between the first connecting line 430 and the rigid loading disc 210 45 degrees, making the horizontal direction and vertical direction angle between the first connecting line 430 and the rigid loading disc 210 be other angles, when simulating the uniform wind load in the horizontal direction perpendicular to a certain side of the roof, further adjusting the connecting position of the first connecting line 430 on the rigid loading disc 210, passing an extension of the first connecting line 430 through the centroid of the rigid load plate 210;
s600, mounting a laser displacement meter, wherein the laser displacement meter is aligned to the centroid of the rigid loading disc 210;
s700, rotating the control valve, and enabling the second weight unit to freely fall to form impact force to finish loading.
In summary, the test loading device and method for simulating complex load of large-span open-pore roof structure provided by the invention are characterized in that the first weights 300 with different quantities and weights are arranged at different positions on the lower surface of the roof structure 200, rain and snow loads with different positions and sizes on the roof are simulated, the position of the guide structure 400 is adjusted, so that a certain angle is formed between the first connecting line 430 and the rigid loading disc 210, wind loads with different directions on the roof are simulated, the difference between the quantity, weight and free falling height of the second weight units is adjusted, wind loads with different sizes on the roof are simulated, the first displacement monitoring device 500 can monitor vertical displacement of the roof structure 200 under the action of rain and snow loads and wind loads, the second displacement monitoring device 510 can monitor vertical displacement of the rigid loading disc 210 under the action of rain and snow loads and wind loads, and can simulate vertical displacement of a large-span open-pore roof structure under the action of different positions, The rain and snow load of the size and the complex load under the combined action of the wind loads in different directions and the size can be used for the verification test of the rationality of the design of the large-span open structure, the rationality of the stress response of the structure can be quickly verified, and reasonable data reference is provided for adjustment, optimization and the like of the design of the large-span open structure.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides a simulation large-span trompil roof structure complex load's experimental loading device which characterized in that includes:
a first bracket (100);
the roof model comprises a roof structure (200) and a rigid loading disc (210), wherein the roof structure (200) is placed on the first support (100), the roof structure (200) is provided with an opening, the rigid loading disc (210) is the same as the opening in shape, and the rigid loading disc (210) is installed on the opening;
the rain and snow load loading unit comprises first weights (300) with adjustable positions, quantities and weights, and the first weights (300) are hung on the lower surface of the roof structure (200) to simulate rain and snow loads of different positions and sizes on the roof;
the wind load loading unit is movably mounted on one side of the first support (100) and comprises a guide structure (400), a second weight unit and a first connecting line (430), one end of the first connecting line (430) is connected with the second weight unit, the other end of the first connecting line (430) is connected with the rigid loading disc (210), the second weight unit performs free-falling body movement and transmits impact force to the rigid loading disc (210) through the first connecting line (430), the first connecting line (430) converts vertical impact force of the second weight unit into impact force in other directions through the guide structure (400), and the number, weight and free-falling height difference of the second weight unit are adjustable to simulate wind loads of different sizes borne by a roof cover, the position of the guide structure (400) is adjustable so as to simulate the roof to be subjected to wind loads in different directions;
the first displacement monitoring device (500) is used for monitoring the vertical displacement of the rigid loading disc (210) under the action of rain and snow loads and wind loads;
and the second displacement monitoring device (510) is used for monitoring the vertical displacement of the roof structure (200) under the action of rain and snow loads and wind loads.
2. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 1, characterized in that: the guide structure (400) comprises a second bracket (440), a fixed frame (450), a first fixed pulley (460) and a second fixed pulley (470), one end of the bottom of the second bracket (440) is provided with a roller, the other end of the bottom of the second bracket (440) is arranged on the first bracket (100) through a bolt, one side of the second bracket (440) is provided with a vertical sliding groove, the fixed frame (450) is slidably arranged on the sliding groove, the first fixed pulley (460) is installed at the inner top of the second bracket (440), the second fixed pulley (470) is installed on the fixed frame (450), one end of the first connecting line (430) is connected with the second weight unit, the other end of the first connecting line (430) is connected with the rigid loading disc (210) through the first fixed pulley (460) and the second fixed pulley (470).
3. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 1, characterized in that: the second support (440) is provided with a baffle (480) capable of being opened and closed and a control device (490), the second weight unit is placed on the baffle (480), and the control device (490) is used for controlling the opening and closing of the baffle (480).
4. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 1, characterized in that: the second weight unit comprises a second weight (410) and a tray (420), a through hole is formed in the center of the second weight (410), and the first connecting line (430) penetrates through the through hole and is connected with the tray (420).
5. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 1, characterized in that: the first weight (300) is hung on the lower surface of the roof structure (200) through a second connecting line (310), a third fixed pulley (320) is installed on the first support (100), and the second connecting line (310) is connected with the first weight (300) through the third fixed pulley (320) and used for adjusting the horizontal position of the first weight (300).
6. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 1, characterized in that: the edge of the opening is surrounded by a circle of mounting groove, and the rigid loading disc (210) is mounted in the mounting groove.
7. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 1, characterized in that: the first support (100) is a steel truss.
8. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 2, is characterized in that: the first displacement monitoring device (500) is a laser displacement meter mounted on the second support (440) and aligned with the centroid of the rigid load plate (210).
9. The test loading device for simulating the complex load of the large-span open-pore roof structure according to claim 1, characterized in that: the light curtain displacement meter is characterized in that the second displacement monitoring device (510) is a light curtain displacement meter, a third support (600) and a fourth support (610) are respectively installed on two sides of the first support (100), a transmitting end and a receiving end of the light curtain displacement meter are respectively installed on the third support (600) and the fourth support (610), a channel is arranged on the roof structure (200), and rays sent by the transmitting end of the light curtain displacement meter pass through the channel to reach the receiving end of the light curtain displacement meter.
10. A test loading method for simulating a complex load of a large-span open pore roof structure by applying the test loading device for simulating a complex load of a large-span open pore roof structure according to any one of the claims 1 to 9, which is characterized by comprising the following steps:
s100, manufacturing a roof structure (200) according to the actual situation of the roof, manufacturing a rigid loading disc (210) with the same shape as that of an opening on the roof, fixing the rigid loading disc (210) on the opening of the roof structure (200), and placing the roof structure (200) on a first support (100);
s200, determining the number, the weight and the mounting position of the first weights (300) according to the loading requirement in advance in the test, and suspending the first weights (300) on the lower surface of the roof structure (200);
s300, adjusting the position of a second displacement monitoring device (510);
s400, fixing the guide structure (400) on the first support (100);
s500, connecting one end of a first connecting line (430) with a rigid loading disc (210), connecting the other end of the first connecting line (430) with a second weight unit, adjusting the number, the weight and the free falling height difference of the second weight unit, and adjusting a guide structure (400) to enable an included angle between the first connecting line (430) and the rigid loading disc (210) to be an angle required by a test;
s600, mounting a first displacement monitoring device (500), wherein the first displacement monitoring device (500) is aligned to the centroid of the rigid loading disc (210);
s700, enabling the second weight unit to freely fall to form impact force, and completing loading.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111571487.5A CN114878191A (en) | 2021-12-21 | 2021-12-21 | Test loading device and method for simulating complex load of large-span open-hole roof structure |
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| CN202111571487.5A CN114878191A (en) | 2021-12-21 | 2021-12-21 | Test loading device and method for simulating complex load of large-span open-hole roof structure |
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| CN114878191A true CN114878191A (en) | 2022-08-09 |
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| CN202111571487.5A Pending CN114878191A (en) | 2021-12-21 | 2021-12-21 | Test loading device and method for simulating complex load of large-span open-hole roof structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117969008A (en) * | 2024-03-29 | 2024-05-03 | 中铁建设集团有限公司 | Wind tunnel test method and model for pushing construction of large-span roof crossing existing line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117969008A (en) * | 2024-03-29 | 2024-05-03 | 中铁建设集团有限公司 | Wind tunnel test method and model for pushing construction of large-span roof crossing existing line |
| CN117969008B (en) * | 2024-03-29 | 2024-06-11 | 中铁建设集团有限公司 | Wind tunnel test method and model for pushing construction of large-span roof crossing existing line |
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