CN103114670A - Single and double-layer spherical reticulated shell with piezoelectric ceramic bar structure and bar internal force monitoring device - Google Patents
Single and double-layer spherical reticulated shell with piezoelectric ceramic bar structure and bar internal force monitoring device Download PDFInfo
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- CN103114670A CN103114670A CN2013100577033A CN201310057703A CN103114670A CN 103114670 A CN103114670 A CN 103114670A CN 2013100577033 A CN2013100577033 A CN 2013100577033A CN 201310057703 A CN201310057703 A CN 201310057703A CN 103114670 A CN103114670 A CN 103114670A
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Abstract
Disclosed are a single and double-layer spherical reticulated shell with a piezoelectric ceramic bar structure and a bar internal force monitoring device. The spherical reticulated shell comprises a plurality of upper chords, a plurality of lower chords, a plurality of diagonal web members, a plurality of ceramic bar connectors, a plurality of bolt-sphere joints, a plurality of sliding hinge supports and a plurality of fixed hinge supports. The monitoring device comprises wireless sensors, a data receiving base station, a data analyzer and conducting wires. The single and double-layer spherical reticulated shell with the piezoelectric ceramic bar structure and the bar internal force monitoring device have the advantages that the single and double-layer spherical reticulated shell is good in seismic performance and convenient to construct, the bar internal force monitoring device is high in result accuracy, is not affected by environmental factors, is high in ageing resistance, can be used for long-term monitoring, is free of constraints of positions of bars and is high in safety, ultra-long data lines are omitted, experiments can be developed conveniently, and the like.
Description
Technical field
The invention belongs to the building structure technology field, particularly relate to the single double Layer Reticulated Dome of a kind of piezoelectric ceramics bar structure and rod member Internal Force Monitoring device.
Background technology
Along with the development of large-span space structure, latticed shell structure is widely applied, and as buildings such as airport building, conference and exhibition center, charge station, arenas, the application example of latticed shell structure all occurred.Space truss structure reasonable stress, rigidity are large, lightweight, can give full play to the tensile and compressive property of material, reduce bending and shearing to the adverse effect of material, and moulding is changeable, and can adjust size of mesh opening according to the building instructions for use, architectural appearance is penetrating, attractive in appearance, can effectively utilize natural lighting, reduce building energy consumption.But the span of latticed shell structure is subject to the control of local stability and monolithic stability, so range of application also is subject to certain restrictions.In addition, latticed shell structure is the main steel that use at present, there is not yet the research report that other materials is applied to latticed shell structure.
Piezoelectric ceramics is a kind of new material of being found by the insulation researcher of research room of Massachusetts Institute Technology nineteen forty-six.Under the mechanical external force effect, relative displacement will occur and cause polarization in the positive and negative charge center of this material internal, thereby cause material two end surfaces the bound charge of opposite in sign to occur.Yet existing piezoceramic material is mainly used in the fields such as buzzer, loudspeaker, sound pick-up, transformer, igniter, has no it and is applied to the research report that building engineering field especially is applied to latticed shell structure.
In addition, the rod member Internal Force Monitoring is the failure mechanism of research network shell structure and carries out the important content that collapsing procedure is analyzed.Existing monitoring method mainly contains: paste foil gauge or strain transducer inverse internal force and utilize vibrating sensor to gather rod member vibration signal inverse internal force.Yet foil gauge or strain transducer are shorter application life, and affected by the factors such as temperature and drift, and the accuracy of long term monitoring rod member internal force result is relatively poor; The vibration signals collecting rule is subjected to influence of ambient vibration, and the rod member vibration signal that vibrating sensor collects need to be processed through filtering, and the situation of distortion appears in result unavoidably in filtering.Therefore, force measuring device in the rod member of research and development latticed shell structure, the accuracy of raising measurement result will promote latticed shell structure theoretical research and further developing that design is used.
In a word, how this new material of piezoelectric ceramics is applied to shell structure, make it as the stressed member of space structures by rational design of node, and utilize the characteristic of piezoelectric ceramics, stressed according to rod member magnitude of voltage inverse rod member, so that the real-time dynamic monitoring rod member is stressed, the proof theory analysis result, has become and promoted the major issue that the shell structure development was used and advanced to piezoelectric ceramics.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide that a kind of anti-seismic performance is good, the single double Layer Reticulated Dome of the piezoelectric ceramics bar structure of constructability.
Another object of the present invention is to provide a kind of measurement result accurate, the safe single double Layer Reticulated Dome upper lever of above-mentioned piezoelectric ceramics bar structure Internal Force Monitoring device.
In order to achieve the above object, the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention comprises many upper chords, many lower chords, many diagonal web members, a plurality of ceramic bar connector, a plurality of bolted spherical node, several sliding hinge bearings and several fixed-hinged supports; Wherein upper chord, lower chord and diagonal web member are the piezoelectric ceramics bar, and the two ends of every upper chord, lower chord and diagonal web member are separately installed with a ceramic bar connector; Utilize a plurality of bolted spherical nodes to connect into traditionally shaped single double Layer Reticulated Dome main body with many upper chords of ceramic bar connector, many lower chords and Duo Gen diagonal web member; Described ceramic bar connector comprises a plurality of pre-embedded bolts, end plate, conehead and a plurality of nut; Wherein a plurality of pre-embedded bolts are arranged on the edge, outer end of upper chord, lower chord or diagonal web member; Be formed with a plurality of circular holes corresponding with the pre-embedded bolt position on end plate, utilize nut to be fixed on the outer face of upper chord, lower chord or diagonal web member; Conehead is the hollow round table structure, and its upper bottom surface middle part is formed with a circular hole, and bottom surface is opening-like, and the bottom surface edge is connected on the outer end edges of end plate; Each bolted spherical node comprises a plurality of high-strength bolts, a plurality of shrouding, a plurality of sleeve, a plurality of pin and a steel ball; Wherein the screw rod on high-strength bolt runs through in the circular hole that is arranged on conehead, and bolt head is positioned at the inside of conehead, radially is formed with a blind hole on the middle part outer circumference surface of screw rod simultaneously; Shrouding is arranged on the upper bottom surface outside of conehead, and the centre is formed with a screw hole; Jacket casing is being positioned on high-strength bolt on the screw rod in the shrouding outside, and runs through on the periphery of sleeve and be formed with a pin hole; The front end of pin passes in the blind hole that is inserted in after pin hole on sleeve on high-strength bolt; Be formed with a plurality of circular holes on steel ball, be used for inserting the front end of screw rod on a plurality of high-strength bolts; The upper end standoff distance of several fixed-hinged supports is arranged on the bolted spherical node that winds up of net shell main body one side, and the lower end is fixed on the structural column top; The upper end standoff distance of several sliding hinge bearings is arranged on all the other bolted spherical nodes that wind up of net shell main body, and the lower end is arranged on the structural column top in a movable manner.
Described upper chord, lower chord and diagonal web member are hollow piezoelectric ceramics round bar.
On described each bolted spherical node, the quantity of pre-embedded bolt and nut is 5-7.
The external surface of described pre-embedded bolt and end plate is coated with insulating coating.
The single double Layer Reticulated Dome upper lever of piezoelectric ceramics bar structure provided by the invention Internal Force Monitoring device comprises wireless senser, data receiver base station, data-analyzing machine and wire; Wherein be separately installed with a wireless senser on every upper chord, lower chord and diagonal web member, preset two wires on every upper chord, lower chord and diagonal web member simultaneously, one end of every wire is connected to an end of upper chord, lower chord and diagonal web member, and the other end and wireless senser join; Wireless senser be arranged on ground data receiver base station radio and be connected; Data receiver base station and data-analyzing machine join by data wire.
The single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention has following advantage: 1) anti-seismic performance is good: find the single member stress of the single double Layer Reticulated Dome of piezoelectric ceramics bar structure and structural entity is quiet, dynamic deformation all can satisfy instructions for use after the common finite element analysis software ANSYS is calculated.2) constructability: the density of piezoelectric ceramics bar is utilized existing construction means and equipment can complete structure and is installed less than steel.
The single double Layer Reticulated Dome upper lever of piezoelectric ceramics bar structure provided by the invention Internal Force Monitoring device has following advantage: 1) according to the mutual conductance formula between pressure and voltage, can accurately measure the rod member stressing conditions, result precision is high.2) be not subjected to such environmental effects, ageing resistance strong, can be used for long term monitoring.3) utilize wireless senser to gather magnitude of voltage, not restricted by the rod member position, do not need to arrange the data wire of overlength, be convenient to carry out experiment.4) safe: as can to calculate in real time rod member by the voltage at dynamic monitoring piezoelectric ceramics bar two ends stressed, can improve the safety in the structure use procedure.
Description of drawings
Fig. 1 is the single double Layer Reticulated Dome plan view of piezoelectric ceramics bar structure provided by the invention.
Fig. 2 be in Fig. 1 A-A to sectional view.
Fig. 3 is the ceramic bar connecting-piece structure schematic diagram that is connected to upper chord, lower chord or diagonal web member end in the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention.
Fig. 4 is bolted spherical node portion structure schematic diagram in the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention.
Fig. 5 is the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention and steel work list double Layer Reticulated Dome natural frequency curve map.
Fig. 6 is the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention and steel work list double Layer Reticulated Dome vertical displacement curve map.
Fig. 7 is the single double Layer Reticulated Dome upper lever of piezoelectric ceramics bar structure provided by the invention Internal Force Monitoring installation composition block diagram.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention and rod member Internal Force Monitoring device are elaborated.
As Figure 1-Figure 4, the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention comprises many upper chords 1, many lower chords 2, many diagonal web members 3, a plurality of ceramic bar connector 4, a plurality of bolted spherical node 5, several sliding hinge bearings 6 and several fixed-hinged supports 7; Wherein upper chord 1, lower chord 2 and diagonal web member 3 are the piezoelectric ceramics bar, and the two ends of every upper chord 1, lower chord 2 and diagonal web member 3 are separately installed with a ceramic bar connector 4; Utilize a plurality of bolted spherical nodes 5 to connect into traditionally shaped single double Layer Reticulated Dome main body with the many upper chords 1 of ceramic bar connector 4, many lower chords 2 and Duo Gen diagonal web member 3; Described ceramic bar connector 4 comprises a plurality of pre-embedded bolts 8, end plate 9, conehead 10 and a plurality of nut 11; Wherein a plurality of pre-embedded bolts 8 are arranged on the edge, outer end of upper chord 1, lower chord 2 or diagonal web member 3; Be formed with a plurality of circular holes corresponding with pre-embedded bolt 8 positions on end plate 9, utilize nut 11 to be fixed on the outer face of upper chord 1, lower chord 2 or diagonal web member 3; Conehead 10 is the hollow round table structure, and its upper bottom surface middle part is formed with a circular hole 12, and bottom surface is opening-like, and the bottom surface edge is connected on the outer end edges of end plate 9; Each bolted spherical node 5 comprises a plurality of high-strength bolts 13, a plurality of shrouding 14, a plurality of sleeve 15, a plurality of pin 16 and a steel ball 17; Wherein the screw rod on high-strength bolt 13 runs through in the circular hole 12 that is arranged on conehead 10, and bolt head is positioned at the inside of conehead 10, radially is formed with a blind hole on the middle part outer circumference surface of screw rod simultaneously; Shrouding 14 is arranged on the upper bottom surface outside of conehead 10, and the centre is formed with a screw hole; Sleeve 15 is enclosed within on the screw rod that is positioned at shrouding 14 outsides on high-strength bolt 13, and runs through on the periphery of sleeve 15 and be formed with a pin hole; The front end of pin 16 passes in the blind hole that is inserted in after pin hole on sleeve 15 on high-strength bolt 13; Be formed with a plurality of circular holes on steel ball 17, be used for inserting the front end of screw rod on a plurality of high-strength bolts 13; The upper end standoff distance of several fixed-hinged supports 7 is arranged on the bolted spherical node that winds up of net shell main body one side, and the lower end is fixed on the structural column top; The upper end standoff distance of several sliding hinge bearings 6 is arranged on all the other bolted spherical nodes that wind up of net shell main body, and the lower end is arranged on the structural column top in a movable manner.
Described upper chord 1, lower chord 2 and diagonal web member 3 are hollow piezoelectric ceramics round bar, not only can alleviate like this overall weight of total, and can reduce costs.
On described each bolted spherical node 5, the quantity of pre-embedded bolt 8 and nut 11 is 5-7.
The external surface of described pre-embedded bolt 8 and end plate 9 is coated with insulating coating.
The single double Layer Reticulated Dome assembling process of piezoelectric ceramics bar structure provided by the invention is as follows:
1) designing requirement of double Layer Reticulated Dome single according to piezoelectric ceramics bar structure, determine the physical dimension of upper chord 1, lower chord 2 and diagonal web member 3, and in two edge, outer end, a plurality of pre-embedded bolts 8 are set in the process of processing upper chord 1, lower chord 2 and diagonal web member 3;
2) utilize a plurality of nuts 11 end plate 9 to be fixed on an outer face of every upper chord 1, lower chord 2 or diagonal web member 3;
3) screw rod on high-strength bolt 13 is run through in the circular hole 12 that is arranged on conehead 10, and bolt head is positioned at the inside of conehead 10;
4) high-strength bolts 13 in the conehead 10 at the upper chord 1 of a plurality of different spaces angles, lower chord 2 or diagonal web member 3 two ends are connected on a bolted spherical node 5, make thus traditionally shaped single double Layer Reticulated Dome main body;
5) the upper end standoff distance with a plurality of fixed-hinged supports 7 is arranged on the bolted spherical node 5 that winds up of net shell main body one side, and the lower end is fixed on the structural column top; The upper end standoff distance of a plurality of sliding hinge bearings 6 is arranged on all the other bolted spherical nodes 5 that wind up of net shell main body, and the lower end is arranged on the structural column top in a movable manner, forms thus the single double Layer Reticulated Dome of described piezoelectric ceramics bar structure.
In order to analyze the anti-seismic performance of the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention, the applicant compared the front 8 rank natural frequency of the single double Layer Reticulated Dome of piezoelectric ceramics bar structure of same apparent size and section area and steel work list double Layer Reticulated Dome with finite element software ANSYS and under horizontal earthquake EL-Centro (1940) ripple effect the vertical displacement situation of change in 8 seconds, the results are shown in Figure 5, Fig. 6.As seen from Figure 5, both front 3 rank natural frequency values are more approaching, illustrate that the dynamic characteristics of the single double Layer Reticulated Dome of piezoelectric ceramics bar structure and steel work list double Layer Reticulated Dome approaches.As seen from Figure 6, the change in displacement amplitude of the single double Layer Reticulated Dome of piezoelectric ceramics bar structure under geological process is slightly less than steel work list double Layer Reticulated Dome, this is gently caused by the structure own wt, means that the single double Layer Reticulated Dome of geological process lower piezoelectric ceramic bar structure has good anti-seismic performance.By above-mentioned analytic method as seen, the single double Layer Reticulated Dome of piezoelectric ceramics bar structure provided by the invention is safe and reliable.
As shown in Figure 7, the single double Layer Reticulated Dome upper lever of piezoelectric ceramics bar structure provided by the invention Internal Force Monitoring device comprises wireless senser 18, data receiver base station 19, data-analyzing machine 20 and wire 21; Wherein be separately installed with a wireless senser 18 on every upper chord 1, lower chord 2 and diagonal web member 3, preset two wires 21 on every upper chord 1, lower chord 2 and diagonal web member 3 simultaneously, one end of every wire 21 is connected to an end of upper chord 1, lower chord 2 and diagonal web member 3, and the other end and wireless senser 18 join; Wireless senser 18 be arranged on base station 19 wireless connections of ground data receiver; Data receiver base station 19 and data-analyzing machine 20 join by data wire.
Now the single double Layer Reticulated Dome upper lever of piezoelectric ceramics bar structure provided by the invention Internal Force Monitoring device operating principle is described below: in the single double Layer Reticulated Dome use procedure of above-mentioned piezoelectric ceramics bar structure, wireless senser 18 is poor with the Voltage force at Real-time Collection upper chord 1, lower chord 2 and diagonal web member 3 two ends, and this detected value is radioed to data receiver base station 19; Data receiver base station 19 is transferred to data-analyzing machine 20 again with the data that a plurality of wireless sensers 18 gather, data-analyzing machine 20 is realized the dynamic monitoring to the single double Layer Reticulated Dome upper lever of piezoelectric ceramics bar structure internal force thus according to the internal force value of rod member under the calculation of design parameters dynamic loading of above-mentioned detected value and every upper chord 1, lower chord 2 and diagonal web member 3.
Claims (5)
1. the single double Layer Reticulated Dome of a piezoelectric ceramics bar structure, it is characterized in that: the single double Layer Reticulated Dome of described piezoelectric ceramics bar structure comprises many upper chords (1), many lower chords (2), many diagonal web members (3), a plurality of ceramic bar connector (4), a plurality of bolted spherical node (5), several sliding hinge bearings (6) and several fixed-hinged supports (7); Wherein upper chord (1), lower chord (2) and diagonal web member (3) are the piezoelectric ceramics bar, and the two ends of every upper chord (1), lower chord (2) and diagonal web member (3) are separately installed with a ceramic bar connector (4); Many upper chords (1), many lower chords (2) and many diagonal web members (3) with ceramic bar connector (4) utilize a plurality of bolted spherical nodes (5) to connect into traditionally shaped single double Layer Reticulated Dome main body; Described ceramic bar connector (4) comprises a plurality of pre-embedded bolts (8), end plate (9), conehead (10) and a plurality of nut (11); Wherein a plurality of pre-embedded bolts (8) are arranged on the edge, outer end of upper chord (1), lower chord (2) or diagonal web member (3); Be formed with a plurality of circular holes corresponding with pre-embedded bolt (8) position on end plate (9), utilize nut (11) to be fixed on the outer face of upper chord (1), lower chord (2) or diagonal web member (3); Conehead (10) is the hollow round table structure, and its upper bottom surface middle part is formed with a circular hole (12), and bottom surface is opening-like, and the bottom surface edge is connected on the outer end edges of end plate (9); Each bolted spherical node (5) comprises a plurality of high-strength bolts (13), a plurality of shrouding (14), a plurality of sleeve (15), a plurality of pin (16) and a steel ball (17); Wherein the screw rod on high-strength bolt (13) runs through in the circular hole (12) that is arranged on conehead (10), and bolt head is positioned at the inside of conehead (10), radially is formed with a blind hole on the middle part outer circumference surface of screw rod simultaneously; Shrouding (14) is arranged on the upper bottom surface outside of conehead (10), and the centre is formed with a screw hole; Sleeve (15) is enclosed within on the screw rod that is positioned at shrouding (14) outside on high-strength bolt (13), and runs through on the periphery of sleeve (15) and be formed with a pin hole; The front end of pin (16) passes in the blind hole that is inserted in after pin hole on sleeve (15) on high-strength bolt (13); Steel ball is formed with a plurality of circular holes on (17), is used for inserting the front end of the upper screw rod of a plurality of high-strength bolts (13); The upper end standoff distance of several fixed-hinged supports (7) is arranged on the bolted spherical node that winds up of net shell main body one side, and the lower end is fixed on the structural column top; The upper end standoff distance of several sliding hinge bearings (6) is arranged on all the other bolted spherical nodes that wind up of net shell main body, and the lower end is arranged on the structural column top in a movable manner.
2. the single double Layer Reticulated Dome of piezoelectric ceramics bar structure according to claim 1, it is characterized in that: described upper chord (1), lower chord (2) and diagonal web member (3) are hollow piezoelectric ceramics round bar.
3. the single double Layer Reticulated Dome of piezoelectric ceramics bar structure according to claim 1, it is characterized in that: the quantity of the upper pre-embedded bolt (8) of described each bolted spherical node (5) and nut (11) is 5-7.
4. the single double Layer Reticulated Dome of piezoelectric ceramics bar structure according to claim 1, it is characterized in that: the external surface of described pre-embedded bolt (8) and end plate (9) is coated with insulating coating.
5. the single double Layer Reticulated Dome upper lever of piezoelectric ceramics bar structure as claimed in claim 1 Internal Force Monitoring device, it is characterized in that: described rod member Internal Force Monitoring device comprises wireless senser (18), data receiver base station (19), data-analyzing machine (20) and wire (21); Wherein be separately installed with a wireless senser (18) on every upper chord (1), lower chord (2) and diagonal web member (3), preset two wires (21) on every upper chord (1), lower chord (2) and diagonal web member (3) simultaneously, one end of every wire (21) is connected to an end of upper chord (1), lower chord (2) and diagonal web member (3), and the other end and wireless senser (18) join; Wireless senser (18) be arranged on ground data receiver base station (19) wireless connections; Data receiver base station (19) and data-analyzing machine (20) join by data wire.
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| CN104499576A (en) * | 2014-12-19 | 2015-04-08 | 苏州工业园区设计研究院股份有限公司 | Veneer hinged joint of grid of roof |
| CN105806572A (en) * | 2016-03-14 | 2016-07-27 | 浙江大学 | Single-layer latticed shell structure node semi-rigid measuring method |
| CN106592761A (en) * | 2017-01-25 | 2017-04-26 | 哈尔滨工业大学 | Bolt-sphere aluminum alloy assembling type joint structure with rectangular-section rod pieces |
| CN106930590A (en) * | 2016-09-21 | 2017-07-07 | 中国地震局工程力学研究所 | New spatial network ball node device with damping function |
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| CN106592761A (en) * | 2017-01-25 | 2017-04-26 | 哈尔滨工业大学 | Bolt-sphere aluminum alloy assembling type joint structure with rectangular-section rod pieces |
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| CN111305380A (en) * | 2020-03-27 | 2020-06-19 | 山东建筑大学 | Aluminum alloy rectangular pipe latticed shell joint based on linear friction welding and connecting method thereof |
| CN111305380B (en) * | 2020-03-27 | 2021-06-22 | 山东建筑大学 | Aluminum alloy rectangular pipe latticed shell joint based on linear friction welding and connecting method thereof |
| CN113374072A (en) * | 2021-05-21 | 2021-09-10 | 徐州腾鲁重工科技有限公司 | Novel steel structure for connecting net racks |
| CN113374072B (en) * | 2021-05-21 | 2022-09-16 | 徐州腾鲁重工科技有限公司 | Steel structure for connecting net racks |
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