Anti-seismic building system for modular integrated house and control method of anti-seismic building system

Abstract

The invention discloses an anti-seismic building system for a modular integrated house and a control method thereof.The anti-seismic building system comprises a modular structure system, an anti-side-damping energy dissipation system and a control system, and the modular structure system is of a frame structure assembled by module nodes, steel beams and steel columns; the connection position of the steel beam and the steel column is connected with a connection node, the lateral damping energy dissipation resisting system comprises a steel strand and a magnetorheological hydraulic oil cylinder, the cylinder barrel end of the magnetorheological hydraulic oil cylinder is connected with the connection node located on the lower portion, and the two ends of the steel strand are connected with the telescopic end of the magnetorheological hydraulic oil cylinder and the connection node located on the upper opposite angle through supporting anchorage devices respectively; a coil arranged on a cylinder barrel of the magneto-rheological hydraulic oil cylinder is connected with a numerical control power source, the numerical control power source adjusts coil current to change magnetic field intensity, and magneto-rheological hydraulic oil has different rigidity and damping under different magnetic field intensity. Through displacement prediction and current control, the rigidity and damping of the integrated building are changed, and the shock resistance is improved.

Description

Technical Field

[0001] This invention relates to modular integrated housing, and more specifically to an earthquake-resistant building system and control method for modular integrated housing. Background Technology

[0002] Currently, modular integrated housing is widely used in low-rise and multi-story buildings, such as community hospitals, villas, apartments, and hotels. However, these building structures suffer from low lateral deformation stiffness and poor seismic resistance, which greatly limits their promotion and application in areas with high seismic fortification requirements. Summary of the Invention

[0003] Purpose of the invention: The first purpose of this invention is to provide an earthquake-resistant building system for modular integrated houses with high lateral deformation stiffness and good seismic resistance; the second purpose of this invention is to provide a control method for the earthquake-resistant building system.

[0004] Technical Solution: The present invention provides an earthquake-resistant building system for modular integrated housing, comprising a modular structural system and a lateral damping energy dissipation system. The modular structural system is a frame structure assembled from modular nodes, steel beams, and steel columns. The lateral damping energy dissipation system includes steel strands and magnetorheological hydraulic cylinders. Connection nodes are provided at the joints of the steel beams and steel columns. The cylinder end of the magnetorheological hydraulic cylinder is connected to the lower connection node. The telescopic end of the magnetorheological hydraulic cylinder is connected to one end of the steel strand through a lower support anchor, and the other end of the steel strand is connected to the upper diagonal connection node through an upper support anchor. A coil is provided on the cylinder of the magnetorheological hydraulic cylinder, which is connected to a digital control power supply. The digital control power supply adjusts the coil current to change the magnetic field strength. Under different magnetic field strengths, the magnetorheological hydraulic oil has different stiffness and damping.

[0005] Furthermore, a first thick plate is welded to the end of the steel beam, and a second thick plate is welded to the end of the steel column. The thick plates are connected to the module nodes by bolts.

[0006] Furthermore, a first stiffening rib is welded between the steel column base and the second thick plate.

[0007] Furthermore, the connection node includes a Π-shaped steel, a first steel plate, and a second steel plate. The Π-shaped steel and the second steel plate are fixed in pairs to both sides of the steel beam or steel column by tie bolts, wherein the Π-shaped steel is located on the inner side. A Π-shaped steel is connected to each end of the first steel plate. An ear plate is provided at the bottom of the cylinder end, and the ear plate is connected to the first steel plate of the lower connection node by a pin.

[0008] Furthermore, a second stiffening rib is welded onto the first steel plate.

[0009] Furthermore, the telescopic end of the magnetorheological hydraulic cylinder has a threaded end, and the lower support anchor includes a fifth steel plate and a pair of fourth steel plates. The fourth steel plates are fixedly connected to the fifth steel plate through a third steel plate. The threaded end is fixed to the fifth steel plate by nuts and washers. Anchor plates are fixed to the bottom of the two fourth steel plates, and the ends of the steel strands are fixed to the anchor plates by clamp anchors.

[0010] Furthermore, a pressure sensor is provided between the anchor plate and the fourth steel plate to detect the tension of the steel strand.

[0011] Furthermore, the upper support anchor has a similar structure to the lower support anchor. The fifth steel plate of the upper support anchor is welded with an ear plate and is connected to the first steel plate of the upper connection node by a pin.

[0012] Furthermore, the earthquake-resistant building system also includes a control system, which includes a cross-shaped laser emitter, a camera, and a ruler. A cross-shaped laser emitter and a camera are installed on the top slab of each floor, and a ruler is installed at the corresponding position on the bottom slab of each floor. The cross-shaped laser emitter emits a cross-shaped laser beam that hits the ruler. The image captured by the camera is transmitted to a computer via an Ethernet wireless network, and the reading on the ruler is obtained through an image recognition algorithm. Each magnetorheological hydraulic cylinder is connected to a digitally controlled power supply, which is controlled by the computer via an Ethernet wireless network.

[0013] The control method for the earthquake-resistant building system of the present invention includes:

[0014] Record The scale readings for each floor at any given time are used as initial values;

[0015] Assumption At that moment, the computer received the data sent by the seismic network. Seismic signals at any time ,Will Subtract the scale reading at time from the initial value to obtain... Inter-story displacement matrix at time 1 ;

[0016] Will The overall stiffness matrix of the building at any time And the overall damping ratio matrix of the building Input the sequence generation module in the computer to generate a stiffness matrix sequence and a damping ratio matrix sequence with derived random distribution; the stiffness of each floor of the building is the building's own stiffness plus the stiffness of the lateral damping energy dissipation system; the damping ratio of each floor of the building is the building's own damping ratio plus the damping ratio of the lateral damping energy dissipation system.

[0017] Will Seismic signals at any time , Inter-story displacement matrix at time 1 , The overall stiffness matrix of the building at any time And the overall damping ratio matrix of the building The stiffness matrix sequence and damping ratio matrix sequence are input into the analysis and prediction module of the computer to generate... The predicted inter-layer displacement matrix sequence at time points; the analysis and prediction module is a multi-layer feedforward neural network;

[0018] By selecting the stiffness and damping ratio corresponding to the matrix with the minimum modulus in the predicted inter-story displacement matrix sequence as the optimal solution, the corresponding current is used to control the magnetorheological hydraulic cylinders of each floor.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0020] (1) A flexible support system is adopted, which occupies less building space;

[0021] (2) The support system is a modular structure, which is easy to install and does not damage the beams and columns themselves. It can be used as a component of this system or as a reinforcement and renovation component system for other existing frame-type building structures.

[0022] (3) By combining magnetorheological hydraulic cylinders with displacement prediction, rapid and active control can be achieved in response to earthquakes, thereby changing the stiffness and damping of integrated buildings, realizing optimal seismic control, improving the seismic resistance of such buildings, and ensuring structural safety. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the modular earthquake-resistant building system in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the beam-column connection node structure in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the lower support node structure of the modular earthquake-resistant building system in an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 Section 1-1;

[0027] Figure 5 This is a schematic diagram of the lower support anchor in an embodiment of the present invention;

[0028] Figure 6 yes Figure 5 Section 2-2;

[0029] Figure 7 yes Figure 5 Section 3-3;

[0030] Figure 8 yes Figure 5 Section 4-4;

[0031] Figure 9 This is a schematic diagram of the upper support node structure of the modular earthquake-resistant building system in an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the upper support anchor in an embodiment of the present invention;

[0033] Figure 11 yes Figure 10 Section 5-5;

[0034] Figure 12 yes Figure 10 Section 6-6;

[0035] Figure 13 This is a schematic diagram of the structure of the magnetorheological hydraulic cylinder in an embodiment of the present invention;

[0036] Figure 14 This is a cross-sectional view of the magnetorheological hydraulic cylinder in an embodiment of the present invention;

[0037] Figure 15 This is a schematic diagram of the control system in an embodiment of the present invention;

[0038] Figure 16 This is a schematic diagram of the displacement monitoring device of the control system in an embodiment of the present invention;

[0039] Figure 17 This is an image of a cross laser beam striking a scale as observed by the camera in an embodiment of the present invention;

[0040] Figure 18 This is a flowchart of the control method for the earthquake-resistant building system in an embodiment of the present invention. Detailed Implementation

[0041] The invention will now be further described with reference to the accompanying drawings.

[0042] Appendix Figures 1 to 18 The accompanying figure labels are as follows:

[0043] 1. Module node; 2. First thick plate; 3. Steel beam; 4. Steel column; 5. Π-shaped steel; 6. First steel plate; 7. Ear plate; 8. Pin shaft; 9. Steel strand; 10. Lower support anchor; 11. Magnetorheological hydraulic cylinder; 12. Second thick plate; 13. Bolt; 14. First stiffening rib; 15. Second steel plate; 16. Tie bolt; 17. Second stiffening rib; 18. Cylinder end; 19. Electrical wire; 20. Wedge anchor; 21. 22. Pressure sensor; 23. First nut; 24. Washer; 25. Threaded end; 26. Third steel plate; 27. Fourth steel plate; 28. Fifth steel plate; 29. ​​Second nut; 30. Upper oil valve; 31. Lower oil valve; 32. CNC power supply; 33. Magnetorheological hydraulic oil; 34. Piston; 35. Computer; 36. Scale; 37. Cross laser emitter; 38. Camera; 39. Ethernet wireless network; 30. Cross laser.

[0044] like Figure 1 and Figure 15 As shown, this embodiment of the invention provides an earthquake-resistant building system for modular integrated housing, including a modular structural system, a lateral damping energy dissipation system, and a control system.

[0045] Combination Figure 2 The modular structure system is a frame structure, including module node 1, steel beam 3 and steel column 4. The end of the steel beam 3 is welded with a first thick plate 2. Bolt holes are reserved on the first thick plate 2. The first thick plate 2 is installed on the module node 1 by bolts 13.

[0046] A second thick plate 12 is welded to the end of the steel column 4. Bolt holes are pre-drilled on the second thick plate 12, and the second thick plate 12 is installed on the module node 1 by bolts 13. A first stiffening rib 14 is welded between the column base of the steel column 4 and the second thick plate 12.

[0047] The anti-lateral damping energy dissipation system includes steel strands 9 and magnetorheological hydraulic cylinders 11, and a connection node is provided at the joint position of the steel beam 3 and the steel column 4.

[0048] Combination Figure 3 , Figure 4 and Figure 9 The connecting node includes a Π-shaped steel bar 5, a first steel plate 6, and a second steel plate 15. The Π-shaped steel bar 5 and the second steel plate 15 are fixed in pairs to both sides of the steel beam 3 or the steel column 4 by tie bolts 16, with the Π-shaped steel bar 5 located on the inner side. The two ends of the first steel plate 6 are welded and fixed to the two Π-shaped steel bars 5. A second stiffening rib 17 is welded onto the first steel plate 6.

[0049] The cylinder end 18 of the magnetorheological hydraulic cylinder 11 is connected to the lower connection node. Specifically, a lug 7 is welded to the bottom of the cylinder end 18, and the lug 7 is connected to the first steel plate 6 of the lower connection node by a pin 8.

[0050] The telescopic end of the magnetorheological hydraulic cylinder 11 is connected to one end of the steel strand 9 via the lower support anchor 10. Specifically, in conjunction with... Figures 5 to 8 The lower support anchor 10 includes a fifth steel plate 27 and a pair of fourth steel plates 26, which are welded to the fifth steel plate 27 via a third steel plate 25. Bolt holes are provided on the fifth steel plate 27. The telescopic end of the magnetorheological hydraulic cylinder 11 has a threaded end 24, which passes upward through the bolt holes and is secured by a first nut 22, a second nut 28, and a washer 23. Anchor plates are fixed to the bottom of the two fourth steel plates 26, and a steel strand 9 passes downward between the two fourth steel plates 26. The end of the steel strand 9 is fixed to the anchor plate via a clamp anchor 20. Furthermore, a pressure sensor 21 is installed between the anchor plate and the fourth steel plates 26 to detect the tension of the steel strand 9.

[0051] The other end of the steel strand 9 is connected to the upper diagonal connection node via an upper support anchor. Specifically, combined with Figures 9 to 12 The upper support anchor is similar in structure to the lower support anchor 10, except that the fifth steel plate 27 of the upper support anchor is welded with an ear plate 7, and the ear plate 7 is connected to the first steel plate 6 of the upper connection node by a pin 8.

[0052] like Figure 13 and Figure 14 As shown, the magnetorheological hydraulic cylinder 11 has an upper oil valve 29, a lower oil valve 30, and a piston 33. The movement of the piston 33 is controlled by the upper oil valve 29 and the lower oil valve 30, which in turn controls the movement of the telescopic end to tighten the steel strand 9. The tension of the steel strand 9 is measured by the pressure sensor 21. Once the preset tension is reached, the tensioning stops, and the upper oil valve 29 and the lower oil valve 30 are closed, so that the magnetorheological hydraulic cylinder 11 maintains the current length.

[0053] The magnetorheological hydraulic cylinder 11 is connected to the CNC power supply 31 via a wire 19, which is wound around the cylinder barrel to form a coil. The CNC power supply 31 adjusts the coil current. Thus, the magnetic field strength can be controlled. Adjustment of different magnetic field strengths Under different conditions, the stiffness and damping of the magnetorheological hydraulic oil 32 will affect the stiffness of the entire support system. and damping The current can be adjusted by the CNC power supply 31. To control.

[0054] The control system includes a cross-shaped laser emitter 36, a camera 37, and a scale 35. Figure 15 The exhibit showcases a four-story modular building structure, with cross-shaped laser emitters 36 and cameras 37 installed on the roof of each floor, and rulers 35 installed at corresponding positions on the floor's base. Combined with... Figure 16 and Figure 17A cross laser emitter 36 emits a cross laser 39 which hits a scale 35. The image captured by the camera 37 is transmitted to the computer 34 via an Ethernet wireless network 38. The reading on the scale 35 is obtained through an image recognition algorithm (existing technology). Each magnetorheological hydraulic cylinder 11 is connected to a digital control power supply 31, which is controlled by the computer 34 via the Ethernet wireless network 38.

[0055] like Figure 18 As shown, this embodiment of the invention also provides a control method for the earthquake-resistant building system described in this embodiment, comprising:

[0056] Record The initial values ​​are the scale readings at 35 degrees on each floor, and are denoted as M1, M2, M3, and M4 respectively.

[0057] Assumption At that moment, the computer received the data sent by the seismic network. Seismic signals at any time Because the signal transmission speed is faster than the seismic wave propagation speed, the time difference is... ,therefore Seismic waves only act on buildings at specific times.

[0058] Will The difference between the scale reading at time 35 and the initial value is obtained. Inter-story displacement matrix at time 1 :

[0059]

[0060] Due to the supporting effect of the magnetorheological hydraulic cylinder 11 and the steel strand 9, the stiffness of each floor of the building is equal to the stiffness of the building itself. Adding the stiffness of the lateral damping energy dissipation system ,so The overall building stiffness matrix at time t is:

[0061]

[0062] Due to the supporting effect of the magnetorheological hydraulic cylinder 11 and the steel strand 9, the damping ratio of each floor of the building is equal to the building's own damping ratio. Adding the damping ratio of the lateral damping energy dissipation system ,so The overall building damping ratio matrix at time t is:

[0063]

[0064] Will The overall stiffness matrix of the building at any time And the overall damping ratio matrix of the building The sequence generation module in computer 34 is based on a computational module combining Bi-LSTM and genetic algorithms (existing technology). It can be programmed using MATLAB-API software modules to generate sequences. A sequence of continuously varying stiffness matrices and A sequence of continuously varying damping ratio matrices , The dimension number is the number of floors, where and From 1 to Natural numbers between.

[0065] For example, the minimum adjustable stiffness of the overall building is:

[0066]

[0067] The minimum adjustable damping ratio for each floor is:

[0068]

[0069] The maximum adjustable stiffness of the building's overall stiffness is:

[0070]

[0071] The maximum adjustable damping ratio for each floor is:

[0072]

[0073] but:

[0074]

[0075]

[0076]

[0077]

[0078] For any and :

[0079]

[0080]

[0081] Let K = { ,…, , }, ={ ,…, , }.Will Seismic signals at any time , Inter-story displacement matrix at time 1 , The overall stiffness matrix of the building at any time Damping ratio matrix And K and The data is input into the analysis and prediction module of computer 34.

[0082] The analysis and prediction module is a multi-layer feedforward neural network (FNN) with 3 layers and the number of neurons in each layer is [number missing]. Based on the finite element model of the building, the input is an artificial wave Ag generated by inverse Fourier transform based on the design response spectrum of the construction site. The analysis result is used as the training target data Tg. The FNN is trained using {Ag, Tg} as the training dataset, and the adaptive algorithm is used for further learning and correction based on the measured vibration data of the building.

[0083] The analysis and prediction module can output indivual The sequence of predicted inter-story displacement matrices at time points:

[0084]

[0085] Predicting inter-story displacement matrix The model is In D={ ,…, , } found The sequence with the smallest value [ ], then the corresponding { } is the optimal solution.

[0086] The computer 34 transmits the data of the current corresponding to the stiffness and damping ratio of the optimal solution to the CNC power supply 31. The CNC power supply 31 transmits the current corresponding to the stiffness and damping ratio of the optimal solution to each floor through the wire 19. The magnetic field of the magnetorheological hydraulic cylinder 11 is changed by the current, so that the magnetorheological hydraulic oil 32 reaches the stiffness and damping ratio of the optimal solution under the change of the magnetic field, thereby improving the seismic performance of the integrated building.

Claims

1. A seismic-resistant building system for modular integrated housing, characterized in that, The system includes a modular structure system and a lateral damping energy dissipation system. The modular structure system is a frame structure assembled from modular nodes (1), steel beams (3) and steel columns (4). The lateral damping energy dissipation system includes steel strands (9) and magnetorheological hydraulic cylinders (11). A connection node is provided at the joint position of the steel beams (3) and the steel columns (4). The cylinder end (18) of the magnetorheological hydraulic cylinder (11) is connected to the lower connection node. The telescopic end of the magnetorheological hydraulic cylinder (11) is connected to one end of the steel strands (9) through the lower support anchor (10). The other end of the steel strands (9) is connected to the upper diagonal connection node through the upper support anchor. A coil is provided on the cylinder of the magnetorheological hydraulic cylinder (11). The coil is connected to a digital control power supply (31). The digital control power supply (31) adjusts the coil current and thus changes the magnetic field strength. Under different magnetic field strengths, the magnetorheological hydraulic oil (32) has different stiffness and damping.

2. The earthquake-resistant building system according to claim 1, characterized in that, The first thick plate (2) is welded to the end of the steel beam (3), and the second thick plate (12) is welded to the end of the steel column (4). The thick plates are connected to the module node (1) by bolts (13).

3. The earthquake-resistant building system according to claim 2, characterized in that, The steel column (4) has a first stiffening rib (14) welded between the column base and the second thick plate (12).

4. The earthquake-resistant building system according to claim 1, characterized in that, The connection node includes a Π-shaped steel (5), a first steel plate (6), and a second steel plate (15). The Π-shaped steel (5) and the second steel plate (15) are fixed in pairs to both sides of the steel beam (3) or the steel column (4) by tie bolts (16), wherein the Π-shaped steel (5) is located on the inner side; a Π-shaped steel (5) is connected to each end of the first steel plate (6); an ear plate (7) is provided at the bottom of the cylinder end (18), and the ear plate (7) is connected to the first steel plate (6) of the lower connection node by a pin (8).

5. The earthquake-resistant building system according to claim 4, characterized in that, A second stiffening rib (17) is welded onto the first steel plate (6).

6. The earthquake-resistant building system according to claim 4, characterized in that, The telescopic end of the magnetorheological hydraulic cylinder (11) has a threaded end (24). The lower support anchor (10) includes a fifth steel plate (27) and a pair of fourth steel plates (26). The fourth steel plate (26) is fixedly connected to the fifth steel plate (27) through a third steel plate (25). The threaded end (24) is fixed to the fifth steel plate (27) through a nut and a washer (23). Anchor plates are fixed at the bottom of the two fourth steel plates (26). The ends of the steel strands (9) are fixed to the anchor plates through a clamp anchor (20).

7. The earthquake-resistant building system according to claim 6, characterized in that, A pressure sensor (21) is provided between the anchor plate and the fourth steel plate (26) to detect the tension of the steel strand (9).

8. The earthquake-resistant building system according to claim 7, characterized in that, The upper support anchor is similar in structure to the lower support anchor (10). The fifth steel plate (27) of the upper support anchor is welded with an ear plate (7) and connected to the first steel plate (6) of the upper connection node by a pin (8).

9. The earthquake-resistant building system according to any one of claims 1 to 8, characterized in that, It also includes a control system, which includes a cross laser emitter (36), a camera (37) and a scale (35). The cross laser emitter (36) and the camera (37) are installed on the top plate of each floor of the building, and the scale (35) is installed at the corresponding position on the bottom plate of each floor. The cross laser emitter (36) emits a cross laser (39) and hits the scale (35). The image captured by the camera (37) is transmitted to the computer (34) via Ethernet wireless network (38). The reading on the scale (35) is obtained through the image recognition algorithm. Each magnetorheological hydraulic cylinder (11) of each floor is connected to a digital control power supply (31), which is controlled by the computer (34) via Ethernet wireless network (38).

10. A control method for the earthquake-resistant building system according to claim 9, characterized in that, include: Record The scale reading (35) of each floor at any given time is used as the initial value; Assumption At that moment, the computer (34) received the data sent by the seismic network. Seismic signals at any time ,Will The difference between the reading on the scale (35) at time and the initial value is obtained. Inter-story displacement matrix at time 1 ; Will The overall building stiffness matrix at any time And the overall damping ratio matrix of the building Input the sequence generation module in the computer (34) to generate a stiffness matrix sequence and a damping ratio matrix sequence with a derived random distribution; the stiffness of each floor of the building is the building's own stiffness plus the stiffness of the lateral damping energy dissipation system; the damping ratio of each floor of the building is the building's own damping ratio plus the damping ratio of the lateral damping energy dissipation system. Will Seismic signals at any time , Inter-story displacement matrix at time 1 , The overall building stiffness matrix at any time And the overall damping ratio matrix of the building The stiffness matrix sequence and damping ratio matrix sequence are input into the analysis and prediction module in the computer (34) to generate... The predicted inter-layer displacement matrix sequence at time points; the analysis and prediction module is a multi-layer feedforward neural network; By selecting the stiffness and damping ratio corresponding to the matrix with the minimum modulus in the predicted inter-story displacement matrix sequence as the optimal solution, the corresponding current is used to control the magnetorheological hydraulic cylinders of each floor (11).

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