CN103114670B - 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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- CN103114670B CN103114670B CN201310057703.3A CN201310057703A CN103114670B CN 103114670 B CN103114670 B CN 103114670B CN 201310057703 A CN201310057703 A CN 201310057703A CN 103114670 B CN103114670 B CN 103114670B
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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 building structure technology field, particularly relate to a kind of piezoelectric ceramics bar structure list double Layer Reticulated Dome 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, has all occurred the application example of latticed shell structure.Space truss structure reasonable stress, rigidity are large, lightweight, can give full play to the tensile and compressive property of material, reduce the adverse effect of bending and shearing to material, and moulding is changeable, and can adjust size of mesh opening according to 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, and therefore range of application is also subject to certain restrictions.In addition, latticed shell structure is the main steel that use at present, there is not yet other materials and be applied to the research report of 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 mechanical external force effect, generation relative displacement is caused polarization by the positive and negative charge center of this material internal, thereby cause material two end surfaces to occur the bound charge that symbol is contrary.But existing piezoceramic material is mainly used in the fields such as buzzer, loudspeaker, sound pick-up, transformer, igniter, have no it and be applied to building engineering field and be especially applied to the research report of latticed shell structure.
In addition, rod member Internal Force Monitoring is the failure mechanism of research network shell structure and an important content that carries out collapsing procedure analysis.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.But foil gauge or strain transducer are shorter application life, and affected by the factor such as temperature and drift, the accuracy of long term monitoring rod member internal force result is poor; Vibration signals collecting rule is subject to influence of ambient vibration, and the rod member vibration signal that vibrating sensor collects need to be processed after filtering, and in filtering, the situation of distortion appears in result unavoidably.Therefore, force measuring device in the rod member of research and development latticed shell structure, the accuracy of raising measurement result, will promote further developing of latticed shell structure theoretical research and design application.
In a word, how this piezoelectric ceramics new material is applied to shell structure, make its stressed member as 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 real-time dynamic monitoring rod member is stressed, proof theory analysis result, become a major issue promoting piezoelectric ceramics application and advance shell structure development.
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 piezoelectric ceramics bar structure list double Layer Reticulated Dome of constructability.
The above-mentioned piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever Internal Force Monitoring device that provides a kind of measurement result accurate, safe is provided another object of the present invention.
In order to achieve the above object, piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention comprises many upper chords, many lower chords, many diagonal web members, multiple ceramic bar connector, multiple bolted spherical node, several sliding hinge bearings and several fixed-hinged supports; Wherein upper chord, lower chord and diagonal web member are 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 multiple 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 multiple pre-embedded bolts, end plate, conehead and multiple nut; Wherein multiple pre-embedded bolts are arranged on the edge, outer end of upper chord, lower chord or diagonal web member; On end plate, be formed with multiple circular holes corresponding with pre-embedded bolt position, utilize nut to be fixed on the outer face of upper chord, lower chord or diagonal web member; Conehead is hollow round table structure, and its upper bottom surface middle part is formed with a circular hole, and bottom surface is opening-like, and bottom surface edge is connected in the outer end edges of end plate; Each bolted spherical node comprises multiple high-strength bolts, multiple shrouding, multiple sleeve, multiple pin and a steel ball; Wherein the screw rod on high-strength bolt runs through in the circular hole being arranged on conehead, and bolt head is positioned at the inside of conehead, is radially 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 centre is formed with a screw hole; Jacket casing is positioned on the screw rod in shrouding outside on high-strength bolt, and on the periphery of sleeve, runs through and be formed with a pin hole; The front end of pin is inserted in the blind hole on high-strength bolt after passing the pin hole on sleeve; On steel ball, be formed with multiple circular holes, for inserting the front end of screw rod on multiple high-strength bolts; The upper end standoff distance of several fixed-hinged supports is arranged on winding up on bolted spherical node of net shell main body one side, and lower end is fixed on structural column top; The upper end standoff distance of several sliding hinge bearings be arranged on net shell main body all the other wind up on bolted spherical node, lower end is arranged on structural column top in a movable manner.
Described upper chord, lower chord and diagonal web member is hollow piezoelectric ceramics round bar.
On described each bolted spherical node, the quantity of pre-embedded bolt and nut is 5-7.
Described pre-embedded bolt and the external surface of end plate are coated with insulating coating.
Piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever Internal Force Monitoring device provided by the invention comprises wireless senser, data receiver base station, data-analyzing machine and wire; Wherein on every upper chord, lower chord and diagonal web member, be separately installed with a wireless senser, on every upper chord, lower chord and diagonal web member, preset two wires simultaneously, one end of every wire is connected to one 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.
Piezoelectric ceramics bar structure list double Layer Reticulated Dome tool provided by the invention has the following advantages: 1) anti-seismic performance is good: after common finite element analysis software ANSYS is calculated, find the single member stress of piezoelectric ceramics bar structure list double Layer Reticulated Dome and structural entity is quiet, dynamic deformation all can meet instructions for use.2) constructability: the density of piezoelectric ceramics bar is less than steel, utilizes existing construction means and equipment can complete structure and installs.
Piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever Internal Force Monitoring device tool provided by the invention has the following advantages: 1) according to the mutual conductance formula between pressure and voltage, can accurately measure rod member stressing conditions, result precision is high.2) be not subject 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 rod member position, do not need to arrange the data wire of overlength, be convenient to carry out experiment.4) safe: 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 structure use procedure.
Brief description of the drawings
Fig. 1 is piezoelectric ceramics bar structure list double Layer Reticulated Dome plan view 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 piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention.
Fig. 4 is bolted spherical node portion structure schematic diagram in piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention.
Fig. 5 is piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention and steel work list double Layer Reticulated Dome natural frequency curve map.
Fig. 6 is piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention and steel work list double Layer Reticulated Dome vertical displacement curve map.
Fig. 7 is piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever Internal Force Monitoring installation composition block diagram provided by the invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention and rod member Internal Force Monitoring device are elaborated.
As Figure 1-Figure 4, piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention comprises many upper chords 1, many lower chords 2, many diagonal web members 3, multiple ceramic bar connector 4, multiple 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 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 multiple 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 multiple pre-embedded bolts 8, end plate 9, conehead 10 and multiple nut 11; Wherein multiple pre-embedded bolts 8 are arranged on the edge, outer end of upper chord 1, lower chord 2 or diagonal web member 3; On end plate 9, be formed with multiple circular holes corresponding with pre-embedded bolt 8 positions, 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 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 bottom surface edge is connected in the outer end edges of end plate 9; Each bolted spherical node 5 comprises multiple high-strength bolts 13, multiple shrouding 14, multiple sleeve 15, multiple pin 16 and a steel ball 17; Wherein the screw rod on high-strength bolt 13 runs through in the circular hole 12 being arranged on conehead 10, and bolt head is positioned at the inside of conehead 10, is radially 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 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 on the periphery of sleeve 15, runs through and be formed with a pin hole; The front end of pin 16 is inserted in the blind hole on high-strength bolt 13 after passing the pin hole on sleeve 15; On steel ball 17, be formed with multiple circular holes, for inserting the front end of screw rod on multiple high-strength bolts 13; The upper end standoff distance of several fixed-hinged supports 7 is arranged on winding up on bolted spherical node of net shell main body one side, and lower end is fixed on structural column top; The upper end standoff distance of several sliding hinge bearings 6 be arranged on net shell main body all the other wind up on bolted spherical node, lower end is arranged on 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.
Described pre-embedded bolt 8 and the external surface of end plate 9 are coated with insulating coating.
Piezoelectric ceramics bar structure list double Layer Reticulated Dome assembling process provided by the invention is as follows:
1) according to the designing requirement of piezoelectric ceramics bar structure list double Layer Reticulated Dome, determine the physical dimension of upper chord 1, lower chord 2 and diagonal web member 3, and in two edge, outer end, multiple pre-embedded bolts 8 are set in the process of processing upper chord 1, lower chord 2 and diagonal web member 3;
2) utilize multiple 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 being arranged on conehead 10, and bolt head is positioned at the inside of conehead 10;
4) high-strength bolt 13 in the conehead 10 at the upper chord of multiple different spaces angles 1, lower chord 2 or diagonal web member 3 two ends is connected on a bolted spherical node 5, makes thus traditionally shaped single double Layer Reticulated Dome main body;
5) the upper end standoff distance of multiple fixed-hinged supports 7 is arranged on to the winding up on bolted spherical node 5 of net shell main body one side, lower end is fixed on structural column top; All the other that the upper end standoff distance of multiple sliding hinge bearings 6 are arranged on to net shell main body are winded up on bolted spherical node 5, and lower end is arranged on structural column top in a movable manner, form thus described piezoelectric ceramics bar structure list double Layer Reticulated Dome.
In order to analyze the anti-seismic performance of piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention, the applicant compared the piezoelectric ceramics bar structure list double Layer Reticulated Dome of same apparent size and section area and the front 8 rank natural frequency of 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, the two front 3 rank natural frequency value is more approaching, illustrates that the dynamic characteristics of piezoelectric ceramics bar structure list double Layer Reticulated Dome and steel work list double Layer Reticulated Dome approaches.As seen from Figure 6, the change in displacement amplitude of piezoelectric ceramics bar structure list double Layer Reticulated Dome under geological process is slightly less than steel work list double Layer Reticulated Dome, this is gently caused by structure own wt, means that geological process lower piezoelectric ceramic bar structure list double Layer Reticulated Dome has good anti-seismic performance.Visible by above-mentioned analytic method, piezoelectric ceramics bar structure list double Layer Reticulated Dome provided by the invention is safe and reliable.
As shown in Figure 7, piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever Internal Force Monitoring device provided by the invention comprises wireless senser 18, data receiver base station 19, data-analyzing machine 20 and wire 21; Wherein on every upper chord 1, lower chord 2 and diagonal web member 3, 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 simultaneously, one end of every wire 21 is connected to one 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 19 wireless connections of ground data receiver base station; Data receiver base station 19 and data-analyzing machine 20 join by data wire.
Now piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever Internal Force Monitoring device operating principle provided by the invention is described below: in the use procedure of above-mentioned piezoelectric ceramics bar structure list double Layer Reticulated Dome, wireless senser 18 is poor 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; The data that data receiver base station 19 gathers multiple wireless sensers 18 are transferred to data-analyzing machine 20 again, data-analyzing machine 20, 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, is realized the dynamic monitoring to piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever internal force thus.
Claims (4)
1. a piezoelectric ceramics bar structure list double Layer Reticulated Dome, is characterized in that: described piezoelectric ceramics bar structure list double Layer Reticulated Dome comprises many upper chords (1), many lower chords (2), many diagonal web members (3), multiple ceramic bar connector (4), multiple 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 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 multiple bolted spherical nodes (5) to connect into traditionally shaped single double Layer Reticulated Dome main body with many upper chords (1), many lower chords (2) and the many diagonal web members (3) of ceramic bar connector (4); Described ceramic bar connector (4) comprises multiple pre-embedded bolts (8), end plate (9), conehead (10) and multiple nut (11); Wherein multiple pre-embedded bolts (8) are arranged on the edge, outer end of upper chord (1), lower chord (2) or diagonal web member (3); On end plate (9), be formed with multiple circular holes corresponding with pre-embedded bolt (8) position, 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 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 bottom surface edge is connected in the outer end edges of end plate (9); Each bolted spherical node (5) comprises multiple high-strength bolts (13), multiple shrouding (14), multiple sleeve (15), multiple pin (16) and a steel ball (17); Wherein the screw rod on high-strength bolt (13) runs through in the circular hole (12) being arranged on conehead (10), and bolt head is positioned at the inside of conehead (10), on the middle part outer circumference surface of screw rod, be radially formed with a blind hole simultaneously; Shrouding (14) is arranged on the upper bottom surface outside of conehead (10), and 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 on the periphery of sleeve (15), runs through and be formed with a pin hole; The front end of pin (16) is inserted in the blind hole on high-strength bolt (13) after passing the pin hole on sleeve (15); Steel ball is formed with multiple circular holes on (17), for inserting the front end of the upper screw rod of multiple high-strength bolts (13); The upper end standoff distance of several fixed-hinged supports (7) is arranged on winding up on bolted spherical node of net shell main body one side, and lower end is fixed on structural column top; The upper end standoff distance of several sliding hinge bearings (6) be arranged on net shell main body all the other wind up on bolted spherical node, lower end is arranged on structural column top in a movable manner.
2. piezoelectric ceramics bar structure list double Layer Reticulated Dome according to claim 1, is characterized in that: described upper chord (1), lower chord (2) and diagonal web member (3) are hollow piezoelectric ceramics round bar.
3. piezoelectric ceramics bar structure list double Layer Reticulated Dome according to claim 1, is characterized in that: described pre-embedded bolt (8) and the external surface of end plate (9) are coated with insulating coating.
4. a piezoelectric ceramics bar structure list double Layer Reticulated Dome upper lever Internal Force Monitoring device as claimed in claim 1, 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 on every upper chord (1), lower chord (2) and diagonal web member (3), 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) simultaneously, one end of every wire (21) is connected to one 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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| CN201310057703.3A CN103114670B (en) | 2013-02-25 | 2013-02-25 | Single and double-layer spherical reticulated shell with piezoelectric ceramic bar structure and bar internal force monitoring device |
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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 |
| CN105806572B (en) * | 2016-03-14 | 2019-04-02 | 浙江大学 | A kind of single-layer latticed shell Semi-rigid measuring method |
| CN106930590B (en) * | 2016-09-21 | 2023-03-10 | 中国地震局工程力学研究所 | Novel space grid structure ball joint device with damping function |
| 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 |
| CN107143042B (en) * | 2017-03-31 | 2022-11-08 | 浙江大学 | Connecting structure of embedded bolts in closed rod piece, screwing method and application in assembling single-layer latticed shell structure of rectangular steel pipe |
| DE102019133189A1 (en) * | 2019-12-05 | 2021-06-10 | Neptunus Beheer B.V. | Rapid assembly hall |
| 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 |
| 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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| US5195291A (en) * | 1991-04-01 | 1993-03-23 | Pomento Patrick G | Spherical wooden truss frame building |
| JP3693569B2 (en) * | 2000-12-04 | 2005-09-07 | 勇 矢原 | Building structure |
| CN102071742B (en) * | 2010-12-06 | 2012-04-25 | 中国民航大学 | Wood structure rectangular plate net rack |
| CN201924450U (en) * | 2010-12-21 | 2011-08-10 | 中国民航大学 | Steel-wood square pyramid space grid with openings |
| CN202108115U (en) * | 2011-06-03 | 2012-01-11 | 中国民航大学 | Bamboo truss string structure |
| CN202248457U (en) * | 2011-10-13 | 2012-05-30 | 中国民航大学 | Wooden-structured, rib-ring patterned and single-layer spherical reticulated shell |
| CN202324185U (en) * | 2011-11-30 | 2012-07-11 | 中国民航大学 | One-way oblique rod type net casing with wood structure and single-layer cylindrical surface |
| CN202416660U (en) * | 2012-02-15 | 2012-09-05 | 中国民航大学 | Timberwork rib-circled single-layer suspended spherical reticulated shell |
| CN202530568U (en) * | 2012-03-27 | 2012-11-14 | 中国民航大学 | Timberwork herringbone single-layer cylindrical reticulated shell |
| CN202492927U (en) * | 2012-03-27 | 2012-10-17 | 中国民航大学 | Wooden dual-diagonal-rod type single-layer cylindrical lattice shell |
| CN202492926U (en) * | 2012-03-27 | 2012-10-17 | 中国民航大学 | Wood structural connecting quadrate singe-layer cylindrical lattice shell |
| CN102653965B (en) * | 2012-05-07 | 2014-06-25 | 中国民航大学 | High-redundancy beam-string truss structure and implementation method |
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