CN112323615A - Bridge elastic-plastic limiting damping energy dissipation device and design method - Google Patents
Bridge elastic-plastic limiting damping energy dissipation device and design method Download PDFInfo
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- CN112323615A CN112323615A CN202011328050.4A CN202011328050A CN112323615A CN 112323615 A CN112323615 A CN 112323615A CN 202011328050 A CN202011328050 A CN 202011328050A CN 112323615 A CN112323615 A CN 112323615A
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- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
The invention relates to a bridge elastic-plastic limiting damping energy dissipation device and a design method thereof, wherein the bridge elastic-plastic limiting damping energy dissipation device comprises the following components: the base is fixedly connected to the fixed pier; the bottom end of the elastic-plastic limiting damping energy-consuming column is fixedly connected to the upper end of the base; the connecting plate is fixedly connected to the lower end of the beam body through bolts; the two sliding plates are slidably connected to the lower end of the connecting plate through bolts, a hollow groove is formed between the two sliding plates, the elastic-plastic limiting damping energy dissipation column is located in the hollow groove and clamped with the two sliding plates, through the design of the structure, the displacement of the girder can be controlled, the device has good ductile deformability after yielding, can effectively dissipate earthquake energy, reduces the damage effect of an earthquake on a bridge structure, protects the bridge structure, has a multidirectional limiting function, and can be quickly replaced after the earthquake.
Description
Technical Field
The invention relates to the technical field of bridge damping, in particular to a design method of a bridge elastic-plastic limiting damping energy dissipation device.
Background
The through-type concrete-filled steel tube arch bridge has the advantages of high rigidity, strong bearing capacity, high spanning capacity, coordination with terrain and the like, so that the through-type concrete-filled steel tube arch bridge is a main structural form of a railway bridge in some special and complex geographic environments at present; if a complete constraint system is adopted, the whole structure generates a large temperature secondary internal force, and the complete constraint system is extremely unfavorable to the anti-seismic performance of the bridge, so that the driving safety is ensured, the influence of the temperature secondary internal force of the bridge on the bridge is reduced, and the shock absorption and energy consumption capability of the bridge structure is improved.
Disclosure of Invention
The invention aims to reduce the influence of the temperature secondary internal force of a bridge and improve the shock absorption and energy consumption capacity of a bridge structure.
In order to achieve the purpose, the invention provides the following technical scheme: spacing shock attenuation power consumption device of bridge elastoplasticity, its characterized in that includes: the base is fixedly connected to the fixed pier;
the bottom end of the elastic-plastic limiting damping energy-consuming column is fixedly connected to the upper end of the base;
the connecting plate is fixedly connected to the lower end of the beam body through bolts;
the two sliding plates are slidably connected to the lower end of the connecting plate through bolts, a hollow groove is formed between the two sliding plates, and the elastic-plastic limiting damping energy dissipation column is located in the hollow groove and clamped with the two sliding plates.
As an improvement of the invention, a tenon body is arranged at the top end of the elastic-plastic limiting damping energy-consuming column, the tenon body and the elastic-plastic limiting damping energy-consuming column are integrated, the side wall of the tenon body is arc-shaped, the top end of the tenon body is a plane, and the tenon body penetrates through the sliding plate to be clamped.
As an improvement of the invention, the outer peripheral wall of the bottom end of the elastic-plastic limiting damping and energy dissipation column is fixedly connected with a reinforcing rib plate, the side end of the reinforcing rib plate is fixedly connected with the elastic-plastic limiting damping and energy dissipation column, and the bottom end of the reinforcing rib plate is fixedly connected with the upper end of the base.
As an improvement of the invention, a baffle plate is fixedly connected around the lower end of the connecting plate, an adjusting bolt is connected with the baffle plate in a threaded manner, and one end of the adjusting bolt penetrates through the baffle plate and is fixedly connected with the peripheral wall of the sliding plate.
As an improvement of the invention, the elastic-plastic limiting, damping and energy-dissipating column is made of TRIP steel.
As an improvement of the present invention, the present invention further comprises: damping device, damping device install in the base lower extreme, and be located inside the hard mound, be equipped with the mounting groove in the hard mound, damping device is located in the mounting groove, damping device includes:
the upper mounting seat is connected in the fixed pier in a sliding manner, the upper mounting seat is fixedly connected to the lower end of the base, and the upper mounting seat is connected in the mounting groove in a limiting and sliding manner;
the lower mounting seat is connected to the bottom end of the mounting groove in a sliding mode, and sliding holes are formed in the corners of the upper end of the lower mounting seat;
the upper end of the fixed rod is fixedly arranged at the end corner of the lower end of the upper mounting seat, and the lower end of the fixed rod extends into the sliding hole and is connected with the sliding hole in a sliding manner;
the strong spring, the strong spring cover is established on the dead lever, just strong spring one end with go up mount pad lower extreme fixed connection, the other end with mount pad upper end fixed connection under the ann, just strong spring is located the sliding hole periphery.
Clamping device, clamping device with damping device cooperation is connected, just clamping device one end and sliding plate fixed connection, clamping device includes:
the mounting block is fixedly connected to the center of the lower end of the upper mounting seat;
the left mounting seat is fixedly connected to the left side of the upper end of the lower mounting seat, and a first sliding groove is transversely formed in the left mounting seat;
the right mounting seat is fixedly connected to the right side of the upper end of the lower mounting seat, a second sliding groove is transversely formed in the right mounting seat, and the axes of the second sliding groove and the first sliding groove are located on the same straight line;
the left sliding rod is connected in the first sliding groove in a sliding mode, and two ends of the left sliding rod extend out of the first sliding groove;
the right sliding rod is connected with the inside of the second sliding groove in a sliding mode, and two ends of the right sliding rod extend out of the second sliding groove;
one end of the first connecting rod is hinged with the lower end of the mounting block, and the other end of the first connecting rod is hinged with the end, close to the right sliding rod, of the left sliding rod;
one end of the second connecting rod is hinged with the lower end of the mounting block, and the other end of the second connecting rod is hinged with the end, close to the left sliding rod, of the right sliding rod;
the third connecting rod is fixedly connected to the left side of the middle part of the elastic-plastic limiting damping energy dissipation column;
the fourth connecting rod is fixedly connected to the right side of the middle part of the elastic-plastic limiting damping energy dissipation column;
one end of the first clamping rod is hinged with the end, away from the right sliding rod, of the left sliding rod, the other end of the first clamping rod is fixedly connected with the left end of the sliding plate, and the middle end of the first clamping rod is hinged with the end, away from the elastic-plastic limiting, damping and energy-dissipating column, of the third connecting rod;
one end of the second clamping rod is hinged to the end, far away from the left sliding rod, of the right sliding rod, the other end of the second clamping rod is fixedly connected with the right end of the sliding plate, and the middle end of the second clamping rod is hinged to the end, far away from the fourth connecting rod, of the elastic-plastic limiting damping energy dissipation column.
As an improvement of the present invention, the present invention further comprises: the transverse energy dissipation device is used for dissipating energy generated by transverse displacement of the beam body; the lateral energy dissipation device comprises:
the rolling shaft is positioned at the bottom end of the lower mounting seat, a limiting rolling groove is formed in the bottom end surface of the mounting groove, the rolling shaft is limited to roll in the limiting rolling groove, and the lower mounting seat is connected to the rolling shaft in a sliding mode;
the first bar-shaped teeth are positioned on the side of the lower side of the upper mounting seat, the middle parts of the first bar-shaped teeth are in a tooth shape, the two end parts of the first bar-shaped teeth are in a bar shape, the section of the tooth-shaped part of the first bar-shaped teeth is larger than that of the bar-shaped part, and the first bar-shaped teeth are positioned between the right mounting seat and the fixed rod;
the upper spring is sleeved at the upper end part of the first strip-shaped tooth, one end of the upper spring is fixedly connected with the upper mounting seat, and the other end of the upper spring is fixedly connected with the end, close to the upper mounting seat, of the tooth-shaped part of the first strip-shaped tooth;
the lower spring is sleeved at the lower end part of the first strip-shaped tooth, one end of the lower spring is fixedly connected with the lower mounting seat, and the other end of the lower spring is fixedly connected with the end, close to the lower mounting seat, of the tooth-shaped part of the first strip-shaped tooth;
the box body is matched and fixedly connected in the mounting groove and is positioned close to the first strip-shaped tooth side, the upper end face of the box body is parallel to the upper end face of the upper mounting seat, the box body is provided with a first cavity, a second cavity, a third cavity, a fourth cavity, a fifth cavity and a sixth cavity, the first cavity is positioned in the box body and is close to the first strip-shaped tooth side, the second cavity is positioned below the first cavity, the second cavity is communicated with the first cavity, the third cavity is positioned below the second cavity, the third cavity is communicated with the second cavity, the fourth cavity is positioned above the second cavity, the fourth cavity is communicated with the second cavity, the fifth cavity is positioned below the third cavity, the fifth cavity is communicated with the third cavity, and the sixth cavity is positioned above the fourth cavity, the sixth cavity is communicated with the fourth cavity;
the first gear is rotatably connected in the first cavity through a first rotating shaft and is meshed with the first straight teeth;
the two ends of the second bar-shaped tooth are provided with tooth shapes, the second bar-shaped tooth is connected in the second cavity in a sliding manner, and the upper end of the second bar-shaped tooth is meshed and connected below the first gear;
the second gear is rotatably connected into the third cavity through a second rotating shaft and is meshed with the lower end of the second bar-shaped tooth;
the third gear is rotatably connected into the fourth cavity through a third rotating shaft and is meshed with the upper end of the second bar-shaped tooth;
the first strip-shaped push rod is slidably connected into the fifth cavity, the tooth-shaped end of the first strip-shaped push rod is meshed with the second gear, and the first strip-shaped push rod extends out of the box body from the fifth cavity;
the second bar-shaped push rod is slidably connected in the sixth cavity, the tooth-shaped end of the second bar-shaped push rod is meshed with the third gear, and the second bar-shaped push rod extends out of the box body from the sixth cavity.
As an improvement of the invention, the design method of the bridge elastic-plastic limiting, damping and energy-consuming device is characterized by comprising the following steps:
step A1: determining an anti-seismic performance target and a checking and calculating criterion of the bridge;
step A2: calculating the elastic-plastic deformation value S of the elastic-plastic limiting damping energy dissipation column and obtaining a force-displacement hysteresis curve of the elastic-plastic limiting damping energy dissipation column;
step A3: preselecting structural shape parameters of the elastic-plastic limiting damping energy-consuming column;
step A4: determining the maximum recovery capacity F of the elastic-plastic limiting damping energy dissipation column according to the elastic-plastic deformation value of the elastic-plastic limiting damping energy dissipation columnα；
Step A5: calculating the proper size of the elastic-plastic limiting damping energy-consuming column according to the maximum recovery capacity value of the elastic-plastic limiting damping energy-consuming column, if the size parameter of the pre-selected elastic-plastic limiting damping energy-consuming column is met, performing the next step, and if the size parameter is not met, adjusting the pre-selected size parameter in the step A3;
step A6: simulating the force-displacement hysteresis curve in the step A2 into a full-bridge model, and checking whether the force-displacement hysteresis curve calculated theoretically meets the anti-seismic performance target and the checking and calculating criterion in the step A1;
step A7: and B, adjusting the elastic-plastic deformation value of the elastic-plastic limiting damping energy-consuming column and the structural shape parameters of the elastic-plastic limiting damping energy-consuming column according to the detection result in the step A6 until the anti-seismic performance target and the detection and calculation criterion in the step A1 are met.
As a modification of the present invention, step B1: determining the height H of the elastic-plastic limiting damping energy dissipation column, and dividing the height H into n heights H;
step B2: calculating the curvature omega of the section of the elastic-plastic limiting damping energy dissipation column in the height hnElastic-plastic limiting damping energy-dissipation column section curvature omeganDetermined by the following equation:
wherein M is the maximum bending moment of the section of the elastic-plastic limiting damping energy dissipation column, E is the elastic modulus, and sigma issIs the yield strain of the cross section of the elastic-plastic limiting damping energy-consuming column in the height h, bnIs the heighth, the height of the section of the elastic-plastic limiting damping energy-consuming column, wherein A is the plastic height of the section of the limiting elastic-plastic limiting damping energy-consuming column;
step B3: through said curvature ωnCalculating the elastic-plastic deformation value S of the elastic-plastic limiting damping energy dissipation column:
and the chi is the value of any height chi in the heights H of the elastic-plastic limiting shock-absorbing energy-consuming column, i is the ith section of the n heights, and i is 1, 2 and 3.
As an improvement of the invention, in the step A4, the maximum recovery capacity F of the elastic-plastic limit shock-absorbing energy-dissipating columnαDetermined by the following equation:
wherein the content of the first and second substances,
as a function of the maximum recovery capacity F of the elastoplastic limiting damping dissipative column with respect to the thickness t of the elastoplastic limiting damping dissipative column,
as a function of the maximum recovery capacity F of the elasto-plastic limiting damping and dissipating device with respect to the width w of the elasto-plastic limiting damping and dissipating column,
representing a binary function fit, A1，A2，A3，a1，a2And taking values of parameters corresponding to the function table.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the elastic-plastic limiting, damping and energy dissipating device for the bridge and the design method can control the displacement control of the main beam when a train passes a bridge in a large-span bridge structure, and when a moderate or strong earthquake occurs, the device has good ductile deformation capacity after yielding, can effectively dissipate earthquake energy, reduces the damage of the earthquake to the bridge structure, protects the bridge structure, has the function of multi-directional limiting, and can be quickly replaced after the earthquake
Other advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of the overall structure of the bridge elastic-plastic limiting, damping and energy dissipating device.
Fig. 2 is a side view of the bridge elastic-plastic limiting, shock-absorbing and energy-dissipating device.
Fig. 3 is a partial schematic view of the bridge elastic-plastic limiting, damping and energy dissipating device according to the present invention.
Fig. 4 is a schematic structural view of a transverse energy dissipation device of the bridge elastic-plastic limiting damping energy dissipation device of the invention.
In the figure, 1 is a base, 2 is a fixed pier, 3 is an elastic-plastic limiting damping energy-dissipation column, 4 is a reinforcing rib plate, 5 is a connecting plate, 6 is a beam body, 7 is a sliding plate, 8 is a tenon body, 9 is a hollow groove, 10 is a baffle plate, 11 is an adjusting bolt, 12 is a damping device, 13 is an upper mounting seat, 14 is a lower mounting seat, 15 is a sliding hole, 16 is a fixed rod, 17 is a strong spring, 18 is a clamping device, 19 is a mounting block, 20 is a left mounting seat, 21 is a first sliding groove, 22 is a right mounting seat, 23 is a second sliding groove, 24 is a left sliding rod, 25 is a right sliding rod, 26 is a first connecting rod, 27 is a second connecting rod, 28 is a third connecting rod, 29 is a fourth connecting rod, 30 is a first clamping rod, 31 is a second clamping rod, 32 is a transverse energy-dissipation device, 33 is a rolling shaft, 34 is a first strip-shaped tooth, 35 is an upper spring, 36 is a lower spring, 37 is a box body, 371 is the first cavity, 372 is the second cavity, 373 is the third cavity, 374 is the fourth cavity, 375 is the fifth cavity, 376 is the sixth cavity, 38 is the first gear, 39 is the first pivot, 40 is the second bar tooth, 41 is the second gear, 42 is the second pivot, 43 is the third gear, 44 is the third pivot, 45 is the first bar catch bar, 46 is the second bar catch bar, 201 is the mounting groove, 202 is the spacing roll groove.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1-4, the elastic-plastic limiting, damping and energy dissipating device for the bridge is characterized in that a base 1 is fixedly connected to a fixed pier 2;
the bottom end of the elastic-plastic limiting damping energy-consuming column 3 is fixedly connected to the upper end of the base 1;
the connecting plate 5 is fixedly connected to the lower end of the beam body 6 through bolts;
the two sliding plates 7 are slidably connected to the lower end of the connecting plate 5 through bolts, a hollow groove 9 is formed between the two sliding plates 7, and the elastic-plastic limiting damping energy dissipation column 3 is located in the hollow groove 9 and is clamped with the two sliding plates 7.
A tenon body 8 is arranged at the top end of the elastic-plastic limiting damping energy-consuming column 3, the tenon body 8 and the elastic-plastic limiting damping energy-consuming column 3 are integrated, the side wall of the tenon body 8 is arc-shaped, the top end of the tenon body 8 is a plane, and the tenon body 8 penetrates through the sliding plate 7 to be clamped;
the outer peripheral wall of the bottom end of the elastic-plastic limiting damping energy-consuming column 3 is fixedly connected with a reinforcing rib plate 4, the side end of the reinforcing rib plate 4 is fixedly connected with the elastic-plastic limiting damping energy-consuming column 3, and the bottom end of the reinforcing rib plate 4 is fixedly connected with the upper end of the base 1.
The working principle of the technical scheme is as follows: the base 1 is fixedly arranged on the fixed pier 2, the elastic-plastic limiting damping energy-consuming column 3 is fixed on the base 1 by the reinforcing rib plate 4, the connecting plate 5 is arranged at the lower end of the beam body 6, the sliding plate 7 consists of a left sliding plate and a right sliding plate, a gap between the left sliding plate and the right sliding plate is a hollow groove 9, the elastic-plastic limiting damping energy-consuming column 3 is positioned between the left sliding plate and the right sliding plate, the tenon body 8 is clamped in the hollow groove 9, a gap is reserved between the top end surface of the tenon body 8 and the bottom end surface of the connecting plate 5, the beam body 6 and the fixed pier 2 can not be clamped when large displacement occurs between the beam body 6 and the fixed pier 2, the sliding plate 7 is connected with the connecting plate 5 through bolts, the diameter of a screw hole of the sliding plate 7 is larger than that of the connecting plate 5, the diameter of the screw hole of the sliding plate 7 is the gap adjustment amount of, the tenon body 8 can limit the displacement of the sliding plate 7, and when the gap between the sliding plate 7 and the peripheral wall of the tenon body 8 is larger than 0, the gap is used for adjusting the temperature deformation and the earthquake energy consumption of the bridge structure.
The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, the displacement control of girder when train crosses the bridge among the steerable large-span bridge structures, in when middle, strong earthquake takes place, the device has good ductility deformability after surging, can dissipate seismic energy effectively, reduces the destruction effect of earthquake to bridge structures, protects bridge structures, and has the spacing function of multidirectional, but just shakes the back quick replacement.
In one embodiment of the invention, a baffle plate 10 is fixedly connected around the lower end of the connecting plate 5, an adjusting bolt 11 is screwed on the baffle plate 10, and one end of the adjusting bolt 11 penetrates through the baffle plate 10 and is fixedly connected with the peripheral wall of the sliding plate 7.
The working principle of the technical scheme is as follows: the periphery of the lower end of the connecting plate 5 is fixedly connected with a baffle plate 10, namely the baffle plate 10 is arranged on the periphery of the sliding plate 7 after being installed, and the adjusting bolt 11 is rotated to drive the sliding plate 7 to slide.
The beneficial effects of the above technical scheme are that: the gap between the sliding plate 7 and the tenon body 8 can be adjusted by the design of the structure.
In one embodiment of the invention, the elastic-plastic limit shock-absorbing energy-dissipating column 3 is made of TRIP steel.
The working principle of the technical scheme is as follows: TRIP steel is a high ductility, high strength steel with high elongation.
The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, the level of steerable roof beam body 6 is spacing, effectively restricts the multidirectional displacement of bridge, has good shock attenuation power consumption function, prevents to take place to fall the roof beam and shakes the evil.
In one embodiment of the present invention, further comprising: damping device 12, damping device 12 install in the 1 lower extreme of base, and be located inside hard mound 2, be equipped with mounting groove 201 in the hard mound 2, damping device 12 is located in mounting groove 201, damping device 12 includes:
the upper mounting seat 13 is connected in the fixed pier 2 in a sliding manner, the upper mounting seat 13 is fixedly connected to the lower end of the base 1, and the upper mounting seat 13 is connected in the mounting groove 201 in a limiting and sliding manner;
the lower mounting seat 14 is slidably connected to the bottom end of the mounting groove 201, and sliding holes 15 are formed at the corners of the upper end of the lower mounting seat 14;
the upper end of the fixed rod 16 is fixedly arranged at the end corner of the lower end of the upper mounting seat 13, and the lower end of the fixed rod 16 extends into the sliding hole 15 and is connected in a sliding manner;
A clamping device 18, wherein the clamping device 18 is connected with the damping device 12 in a matching manner, and one end of the clamping device 18 is fixedly connected with the sliding plate 7, the clamping device 18 comprises:
the mounting block 19 is fixedly connected to the center of the lower end of the upper mounting seat 13;
the left mounting seat 20 is fixedly connected to the left side of the upper end of the lower mounting seat 14, and a first sliding groove 21 is transversely formed in the left mounting seat 20;
the right mounting seat 22 is fixedly connected to the right side of the upper end of the lower mounting seat 14, a second sliding groove 23 is transversely formed in the right mounting seat 22, and the axes of the second sliding groove 23 and the first sliding groove 21 are located on the same straight line;
the left sliding rod 24 is connected in the first sliding groove 21 in a sliding manner, and two ends of the left sliding rod 24 extend out of the first sliding groove 21;
the right sliding rod 25 is connected with the inside of the second sliding groove 23 in a sliding manner, and two ends of the right sliding rod 25 extend out of the second sliding groove 23;
a first connecting rod 26, one end of the first connecting rod 26 is hinged with the lower end of the mounting block 19, and the other end is hinged with the end of the left sliding rod 24 close to the right sliding rod 25;
a second connecting rod 27, one end of the second connecting rod 27 is hinged with the lower end of the mounting block 19, and the other end is hinged with the end of the right sliding rod 25 close to the left sliding rod 24;
the third connecting rod 28 is fixedly connected to the left side of the middle part of the elastic-plastic limiting damping energy dissipation column 3;
the fourth connecting rod 29 is fixedly connected to the right side of the middle part of the elastic-plastic limiting damping energy dissipation column 3;
one end of the first clamping rod 30 is hinged with the end, away from the right sliding rod 25, of the left sliding rod 24, the other end of the first clamping rod 30 is fixedly connected with the left end of the sliding plate 7, and the middle end of the first clamping rod 30 is hinged with the end, away from the elastic-plastic limiting, shock-absorbing and energy-dissipating column 3, of the third connecting rod 28;
one end of the second clamping rod 31 is hinged to the end, away from the left sliding rod 24, of the right sliding rod 25, the other end of the second clamping rod 31 is fixedly connected to the right end of the sliding plate 7, and the middle end of the second clamping rod 31 is hinged to the end, away from the elastic-plastic limiting damping and energy dissipation column 3, of the fourth connecting rod 29.
The working principle of the technical scheme is as follows: when the longitudinal load borne by the beam body 6 is too large, the beam body 6 is stressed to bend downwards, so that the beam body 6 is in contact with the tenon body 8 and drives the tenon body 8 to press downwards, the tenon body 8 drives the elastic-plastic limiting damping energy-consuming column 3 to press downwards, so that the base 1 and the upper mounting seat 13 are driven to move downwards, the strong spring 17 is compressed, the fixing rod 16 slides downwards in the sliding hole 15, the upper mounting seat 13 moves downwards to drive the mounting block 19 to move downwards, the first connecting rod 26 drives the left sliding rod 24 to slide left in the first sliding groove 21, the second connecting rod 27 drives the right sliding rod 25 to slide right in the second sliding groove 23, the left sliding rod 24 drives the first clamping rod 30 to rotate around the hinged part with the third connecting rod 28, the first clamping rod 30 drives the left sliding plate 7 to move towards the direction close to the tenon body 8, and similarly, the second clamping rod 31 drives the right sliding plate 7 to move towards the direction close to the tenon body 8, the sliding plates 7 on both sides are clamped to the tenon body 8.
The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, when the longitudinal load that the roof beam body 6 bore is too big, the powerful spring 17 of accessible plays the shock attenuation effect, prevent that roof beam body 6 from pushing down and leading to the spacing shock attenuation power consumption post of elastoplasticity 3 to bear the too big spacing shock attenuation power consumption post of elastoplasticity 3 to damage, and damping device 12 is easy to assemble and dismantles, it presss from both sides tightly to tenon body 8 to realize left side sliding plate 7 and right side sliding plate 7 simultaneously, the clearance between sliding plate 7 and the tenon body 8 is 0 promptly, sliding plate 7 is no longer taken place the displacement owing to the friction with tenon body 8 perisporium this moment, tenon body 8 has been avoided receiving the damage.
In one embodiment of the present invention, the method further comprises: a transverse energy dissipation device 32, wherein the transverse energy dissipation device 32 is used for dissipating energy generated by transverse displacement of the beam body 6; the lateral energy dissipation device 32 comprises:
the rolling shaft 33 is positioned at the bottom end of the lower mounting seat 14, a limiting rolling groove 202 is formed in the bottom end surface of the mounting groove 201, the rolling shaft 33 is limited to roll in the limiting rolling groove 202, and the lower mounting seat 14 is slidably connected to the rolling shaft 33;
the first strip-shaped teeth 34 are positioned on the lower side of the upper mounting seat 13, the middle parts of the first strip-shaped teeth 34 are in a tooth shape, the two end parts of the first strip-shaped teeth are in a strip shape, the section of the tooth-shaped part of the first strip-shaped teeth 34 is larger than that of the strip-shaped part, and the first strip-shaped teeth 34 are positioned between the right mounting seat 22 and the fixed rod 16;
the upper spring 35 is sleeved at the upper end part of the first bar-shaped tooth 34, one end of the upper spring 35 is fixedly connected with the upper mounting seat 13, and the other end of the upper spring 35 is fixedly connected with the tooth-shaped part of the first bar-shaped tooth 34 close to the upper mounting seat 13;
the lower spring 36 is sleeved at the lower end part of the first bar-shaped tooth 34, one end of the lower spring 36 is fixedly connected with the lower mounting seat 14, and the other end of the lower spring 36 is fixedly connected with the tooth-shaped part of the first bar-shaped tooth 34 close to the lower mounting seat 14;
the box body 37 is adapted to be fixedly connected in the mounting groove 201, the box body 37 is located close to the first strip-shaped tooth 34, the upper end surface of the box body 37 is parallel to the upper end surface of the upper mounting seat 13, the box body 37 is provided with a first cavity 371, a second cavity 372, a third cavity 373, a fourth cavity 374, a fifth cavity 375 and a sixth cavity 376, the first cavity 371 is located close to the first strip-shaped tooth 34 in the box body 37, the second cavity 372 is located below the first cavity 371, the second cavity 372 is communicated with the first cavity 371, the third cavity 373 is located below the second cavity 372, the third cavity 373 is communicated with the second cavity 372, the fourth cavity 374 is located above the second cavity 372, the fourth cavity 374 is communicated with the second cavity 372, and the fifth cavity 375 is located below the third cavity 373, and the fifth cavity 375 is communicated with the third cavity 373, the sixth cavity 376 is positioned above the fourth cavity 374, and the sixth cavity 376 is communicated with the fourth cavity 374;
a first gear 38, wherein the first gear 38 is rotatably connected in the first cavity 371 through a first rotating shaft 39, and the first gear 38 is engaged with the first bar-shaped teeth 34;
the two ends of the second bar-shaped tooth 40 are provided with tooth shapes, the second bar-shaped tooth 40 can be connected in the second cavity 372 in a sliding manner, and the upper end of the second bar-shaped tooth 40 is connected below the first gear 38 in a meshing manner;
a second gear 41, wherein the second gear 41 is rotatably connected in the third cavity 373 through a second rotating shaft 42, and the second gear 41 is in meshed connection with the lower end of the second rack 40;
a third gear 43, wherein the third gear 43 is rotatably connected in the fourth cavity 374 through a third rotating shaft 44, and the third gear 43 is engaged with the upper end of the second bar-shaped tooth 40;
a first bar-shaped pushing rod 45, wherein the first bar-shaped pushing rod 45 is slidably connected in the fifth cavity 375, the toothed end of the first bar-shaped pushing rod 45 is engaged with the second gear 41, and the first bar-shaped pushing rod 45 extends out of the box body 37 from the fifth cavity 375;
the second bar-shaped pushing rod 46, the second bar-shaped pushing rod 46 is slidably connected in the sixth cavity 376, the tooth-shaped end of the second bar-shaped pushing rod 46 is engaged with the third gear 43, and the second bar-shaped pushing rod 46 extends out of the box body 37 from the sixth cavity 376.
The working principle of the technical scheme is as follows: first strip-shaped teeth 34 are respectively arranged between the left mounting seat 20 and the right mounting seat 22 and the fixed rod 16, namely the above devices are four and are symmetrical to the above devices on the left side and the above devices on the right side, when the beam body 6 is subjected to transverse displacement, the beam body 6 drives the sliding plate 7 to transversely move, when the sliding plate 7 slides to the peripheral wall of the tenon body 8, pressure is applied to the tenon body 8 to drive the elastic-plastic limiting damping energy-consuming column 3 to transversely displace, the elastic-plastic limiting damping energy-consuming column 3 drives the damping device 12 and the clamping device 18 to transversely displace, meanwhile, as the transverse displacement of the second clamping rod 31 causes the right sliding rod 25 to slide, the first clamping rod 30 and the second clamping rod 31 clamp the tenon body 8, the elastic-plastic limiting damping energy-consuming column 3 downwards moves to drive the upper mounting seat 13 downwards, the upper spring 35 and the lower spring 36 are compressed under the force to drive the first strip-shaped teeth 34 to downwards move, first bar tooth 34 drives first gear 38 and rotates, first gear 38 drives second bar tooth 40 and slides toward keeping away from first gear 38 direction, second bar tooth 40 drives second gear 41 and third gear 43 and rotates, second gear 41 and third gear 43 drive first bar catch bar 45 respectively and move toward being close to last base 13 direction and second bar catch bar 46 toward being close to lower base 14 direction and remove, make and go up base 13 and follow the spacing shock attenuation power consumption post 3 of elastoplasticity and remove, lower base 14 slides on rolling axle 33.
The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, make roof beam body 6 when receiving too big lateral displacement, the spacing shock attenuation power consumption post of elastoplasticity 3 moving as a whole atress is even, avoided only the spacing shock attenuation power consumption post of elastoplasticity 3 upper end atress to remove and lead to the spacing shock attenuation power consumption post of elastoplasticity 3 internal stress inequality, make the spacing shock attenuation power consumption post of elastoplasticity 3 damaged, set up the supporting power and the shock-absorbing capacity between upper base 13 and lower base 14 that the device has increased more than four groups simultaneously, and when the roof beam body 6 received longitudinal load and lateral displacement simultaneously, furthest's the spacing power consumption shock attenuation post of protection elastoplasticity 3 does not receive the damage.
In one embodiment of the invention, the design method of the bridge elastic-plastic limiting, damping and energy-consuming device is characterized by comprising the following steps of:
step A1: determining an anti-seismic performance target and a checking and calculating criterion of the bridge;
step A2: calculating the elastic-plastic deformation value S of the elastic-plastic limiting damping energy dissipation column 3 and obtaining a force-displacement hysteresis curve of the elastic-plastic limiting damping energy dissipation column;
step A3: preselecting structural shape parameters of the elastic-plastic limiting damping energy-consuming column 3;
step A4: determining the maximum recovery capacity F of the elastic-plastic limiting damping energy-consuming column 3 according to the elastic-plastic deformation value of the elastic-plastic limiting damping energy-consuming column 3α；
Step A5: calculating the proper size of the elastic-plastic limiting damping energy-consuming column 3 according to the maximum recovery capacity value of the elastic-plastic limiting damping energy-consuming column 3, if the size parameter of the preselected elastic-plastic limiting damping energy-consuming column 3 is met, performing the next step, and if the size parameter is not met, adjusting the preselected size parameter in the step A3;
step A6: simulating the force-displacement hysteresis curve in the step A2 into a full-bridge model, and checking whether the force-displacement hysteresis curve calculated theoretically meets the anti-seismic performance target and the checking and calculating criterion in the step A1;
step A7: and B, adjusting the elastic-plastic deformation value of the elastic-plastic limiting damping energy-consuming column 3 and the structural shape parameter of the elastic-plastic limiting damping energy-consuming column 3 according to the detection result in the step A6 until the anti-seismic performance target and the detection and calculation criterion in the step A1 are met.
The working principle of the technical scheme is as follows: firstly, determining an anti-seismic performance target and a check calculation criterion of the bridge, calculating an elastic-plastic deformation value and a maximum recovery capacity of the elastic-plastic limiting damping energy consumption column 3, analyzing whether a calculated structure is consistent with a simulation result through finite element simulation, and changing the size parameter of the elastic-plastic limiting damping energy consumption column 3 if the calculated structure is inconsistent with the simulation result.
The beneficial effects of the above technical scheme are that: through the design of above-mentioned step, can portably push away the spacing shock attenuation of elastoplasticity power consumption post 3 and the elastoplasticity deformation value and the structural shape parameter, through finite element simulation analysis for calculate more accurately, calculate the spacing shock attenuation power consumption post 3's of elastoplasticity size parameter simultaneously, dissipation seismic energy that can very big degree reduces the displacement that roof beam body 6 takes place when the earthquake.
In one embodiment of the present invention, the elastic-plastic deformation value S in step a2 is determined by the following steps:
step B1: determining the height H of the elastic-plastic limiting damping energy dissipation column 3, and dividing the height H into n heights H;
step B2: calculating the curvature omega of the section of the elastic-plastic limiting damping energy-consuming column 3 in the height h n3 section curvature omega of elastic-plastic limiting damping energy-consuming columnnDetermined by the following equation:
wherein M is the maximum bending moment of the section of the elastic-plastic limiting damping energy dissipation column 3, E is the elastic modulus, and sigma issIs the yield strain of the section of the elastic-plastic limiting damping energy-consuming column 3 in the height h, bnFor elastic-plastic limiting in said height hThe height of the section of the shock-absorbing energy-consuming column 3 is A, and the A is the plastic height of the section of the limiting elastic-plastic limiting shock-absorbing energy-consuming column 3;
step B3: through said curvature ωnCalculating the elastic-plastic deformation value S of the elastic-plastic limiting damping energy dissipation column 3:
wherein χ is a value of χ of any height in the heights H of the elastic-plastic limiting shock-absorbing energy-consuming column 3, i is the ith section in the n heights, and i is 1, 2 and 3.
The working principle and the beneficial effects of the technical scheme are as follows: by utilizing the calculation method, the elastic-plastic displacement of the elastic-plastic limiting damping energy-dissipation column 3 with any uniform section and variable section can be calculated, the calculation is simple, and meanwhile, by adopting the algorithm, most sections can enter a yield state at the same time, the ductile deformation capacity is increased to the maximum extent, and the energy-dissipation capacity of the elastic-plastic limiting damping energy-dissipation column 3 is stronger.
In one embodiment of the present invention, the maximum recovery capability F of the elastic-plastic limiting shock-absorbing energy-dissipating column 3 in the step a4αDetermined by the following equation:
wherein the content of the first and second substances,
as a function of the maximum recovery capacity F of the elasto-plastic limiting shock-absorbing energy-dissipating stud 3 with respect to the thickness t of the elasto-plastic limiting shock-absorbing energy-dissipating stud 3,
as a function of the maximum recovery capacity F of the elasto-plastic limiting shock-absorbing and energy-dissipating device 3 with respect to the width w of the elasto-plastic limiting shock-absorbing and energy-dissipating column 3,
represents twoFitting of a Meta function, A1，A2，A3，a1，a2And taking values of parameters corresponding to the function table.
The working principle of the technical scheme is as follows: the values of the above formula are determined by the following parameter table:
table 1, function of maximum restoring force with respect to thickness t:
table 2, function of maximum restoring force with respect to width W:
the beneficial effects of the above technical scheme are that: through the calculation method, the maximum recovery capacity F of the elastic-plastic limiting damping energy-consuming column 3 can be judged through the thickness t and the width w of the elastic-plastic limiting damping energy-consuming column 3αThe calculation error is made smaller.
In the description of the present invention, it is to be understood that the terms "upper end", "lower end", "front end", "rear end", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Finally, it should be noted that: the foregoing is only a preferred embodiment of the invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a spacing shock attenuation power consumption device of bridge elastoplasticity which characterized in that includes:
the base (1), the said base (1) is fixedly connected to the fixed pier (2);
the bottom end of the elastic-plastic limiting damping energy-consuming column (3) is fixedly connected to the upper end of the base (1);
the connecting plate (5) is fixedly connected to the lower end of the beam body (6) through bolts;
the two sliding plates (7) are slidably connected to the lower end of the connecting plate (5) through bolts, a hollow groove (9) is formed between the two sliding plates (7), and the elastic-plastic limiting damping energy dissipation column (3) is located in the hollow groove (9) and is clamped with the two sliding plates (7).
2. The bridge elastic-plastic limiting, damping and energy dissipating device as claimed in claim 1, wherein a tenon (8) is disposed at the top end of the elastic-plastic limiting, damping and energy dissipating column (3), the tenon (8) is integrated with the elastic-plastic limiting, damping and energy dissipating column (3), the side wall of the tenon (8) is arc-shaped, the top end of the tenon (8) is flat, and the tenon (8) is clamped through the sliding plate (7).
3. The bridge elastic-plastic limiting, damping and energy dissipating device according to claim 1, wherein a reinforcing rib plate (4) is fixedly connected to the outer peripheral wall of the bottom end of the elastic-plastic limiting, damping and energy dissipating column (3), the side end of the reinforcing rib plate (4) is fixedly connected with the elastic-plastic limiting, damping and energy dissipating column (3), and the bottom end of the reinforcing rib plate (4) is fixedly connected with the upper end of the base (1).
4. The bridge elastic-plastic limiting, damping and energy dissipating device as claimed in claim 1, wherein a baffle (10) is fixedly connected around the lower end of the connecting plate (5), the baffle (10) is in threaded connection with an adjusting bolt (11), and one end of the adjusting bolt (11) passes through the baffle (10) and is fixedly connected with the peripheral wall of the sliding plate (7).
5. The bridge elastic-plastic limit damping and energy dissipating device as claimed in claim 1, wherein the elastic-plastic limit damping and energy dissipating columns (3) are made of TRIP steel.
6. The bridge elastic-plastic limiting, shock-absorbing and energy-dissipating device according to claim 1, further comprising: damping device (12), damping device (12) install in base (1) lower extreme, and be located inside anchor block (2), be equipped with mounting groove (201) in anchor block (2), damping device (12) are located in mounting groove (201), damping device (12) include:
the upper mounting seat (13) is connected to the fixed pier (2) in a sliding mode, the upper mounting seat (13) is fixedly connected to the lower end of the base (1), and the upper mounting seat (13) is connected to the mounting groove (201) in a limiting and sliding mode;
the lower mounting seat (14) is connected to the bottom end of the mounting groove (201) in a sliding mode, and sliding holes (15) are formed in the corners of the upper end of the lower mounting seat (14);
the upper end of the fixing rod (16) is fixedly arranged at the end corner of the lower end of the upper mounting seat (13), and the lower end of the fixing rod (16) extends into the sliding hole (15) and is connected in a sliding manner;
the strong spring (17) is sleeved on the fixing rod (16), one end of the strong spring (17) is fixedly connected with the lower end of the upper mounting seat (13), the other end of the strong spring (17) is fixedly connected with the upper end of the lower mounting seat (14), and the strong spring (17) is positioned on the periphery of the sliding hole (15);
the clamping device (18), the clamping device (18) is connected with the damping device (12) in a matching mode, one end of the clamping device (18) is fixedly connected with the sliding plate (7), and the clamping device (18) comprises:
the mounting block (19) is fixedly connected to the center of the lower end of the upper mounting base (13);
the left mounting seat (20) is fixedly connected to the left side of the upper end of the lower mounting seat (14), and a first sliding groove (21) is transversely formed in the left mounting seat (20);
the right mounting seat (22) is fixedly connected to the right side of the upper end of the lower mounting seat (14), a second sliding groove (23) is transversely formed in the right mounting seat (22), and the axes of the second sliding groove (23) and the first sliding groove (21) are located on the same straight line;
the left sliding rod (24), the left sliding rod (24) is connected in the first sliding groove (21) in a sliding mode, and two ends of the left sliding rod (24) extend out of the first sliding groove (21);
the right sliding rod (25) is connected with the inside of the second sliding groove (23) in a sliding manner, and two ends of the right sliding rod (25) extend out of the second sliding groove (23);
a first connecting rod (26), wherein one end of the first connecting rod (26) is hinged with the lower end of the mounting block (19), and the other end of the first connecting rod (26) is hinged with the end, close to the right sliding rod (25), of the left sliding rod (24);
one end of the second connecting rod (27) is hinged with the lower end of the mounting block (19), and the other end of the second connecting rod (27) is hinged with the end, close to the left sliding rod (24), of the right sliding rod (25);
the third connecting rod (28) is fixedly connected to the left side of the middle part of the elastic-plastic limiting damping energy-dissipating column (3);
the fourth connecting rod (29), the fourth connecting rod (29) is fixedly connected to the right side of the middle part of the elastic-plastic limiting damping energy-consuming column (3);
one end of the first clamping rod (30) is hinged with the end, away from the right sliding rod (25), of the left sliding rod (24), the other end of the first clamping rod (30) is fixedly connected with the left end of the sliding plate (7), and the middle end of the first clamping rod (30) is hinged with the end, away from the elastic-plastic limiting damping and energy dissipating column (3), of the third connecting rod (28);
one end of the second clamping rod (31) is hinged to the end, far away from the left sliding rod (24), of the right sliding rod (25), the other end of the second clamping rod (31) is fixedly connected with the right end of the sliding plate (7), and the middle end of the second clamping rod (31) is hinged to the end, far away from the elastic-plastic limiting shock-absorbing energy-consuming column (3), of the fourth connecting rod (29).
7. The bridge elastic-plastic limiting, shock-absorbing and energy-dissipating device according to claim 6, further comprising: a transverse energy dissipation device (32), wherein the transverse energy dissipation device (32) is used for dissipating energy generated by transverse displacement of the beam body (6); the lateral energy dissipation device (32) comprises:
the rolling shaft (33) is positioned at the bottom end of the lower mounting seat (14), a limiting rolling groove (202) is formed in the bottom end surface of the mounting groove (201), the rolling shaft (33) is limited to roll in the limiting rolling groove (202), and the lower mounting seat (14) is connected to the rolling shaft (33) in a sliding mode;
the first strip-shaped teeth (34) are positioned on the side of the lower side of the upper mounting seat (13), the middle parts of the first strip-shaped teeth (34) are in a tooth shape, the two end parts of the first strip-shaped teeth are in a strip shape, the section of the tooth-shaped part of each first strip-shaped tooth (34) is larger than that of the strip-shaped part, and the first strip-shaped teeth (34) are positioned between the right mounting seat (22) and the fixing rod (16);
the upper spring (35) is sleeved at the upper end part of the first strip-shaped tooth (34), one end of the upper spring (35) is fixedly connected with the upper mounting seat (13), and the other end of the upper spring is fixedly connected with the tooth-shaped part of the first strip-shaped tooth (34) close to the upper mounting seat (13);
the lower spring (36) is sleeved at the lower end part of the first strip-shaped tooth (34), one end of the lower spring (36) is fixedly connected with the lower mounting seat (14), and the other end of the lower spring is fixedly connected with the tooth-shaped part of the first strip-shaped tooth (34) close to the lower mounting seat (14);
a box body (37), the box body (37) is adapted and fixedly connected in the mounting groove (201), the box body (37) is located close to the side of the first strip-shaped tooth (34), the upper end face of the box body (37) is parallel to the upper end face of the upper mounting seat (13), the box body (37) is provided with a first cavity (371), a second cavity (371), a third cavity (373), a fourth cavity (374), a fifth cavity (375) and a sixth cavity (376), the first cavity (371) is located in the box body (37) close to the side of the first strip-shaped tooth (34), the second cavity (372) is located below the first cavity (371), the second cavity (372) is communicated with the first cavity (371), the third cavity (373) is located below the second cavity (372), and the third cavity (373) is communicated with the second cavity (372), the fourth cavity (374) is located above the second cavity (372), and the fourth cavity (374) communicates with the second cavity (372), the fifth cavity (375) is located below the third cavity (373), and the fifth cavity (375) communicates with the third cavity (373), the sixth cavity (376) is located above the fourth cavity (374), and the sixth cavity (376) communicates with the fourth cavity (374);
a first gear (38), wherein the first gear (38) is rotatably connected in the first cavity (371) through a first rotating shaft (39), and the first gear (38) is meshed with the first strip-shaped teeth (34);
the two ends of the second bar-shaped tooth (40) are provided with tooth shapes, the second bar-shaped tooth (40) is connected in the second cavity (372) in a sliding mode, and the upper end of the second bar-shaped tooth (40) is connected below the first gear (38) in a meshed mode;
a second gear (41), wherein the second gear (41) is rotatably connected in the third cavity (373) through a second rotating shaft (42), and the second gear (41) is in meshed connection with the lower end of the second strip-shaped tooth (40);
a third gear (43), wherein the third gear (43) is rotatably connected in the fourth cavity (374) through a third rotating shaft (44), and the third gear (43) is meshed with the upper end of the second strip-shaped tooth (40);
the first strip-shaped push rod (45) is slidably connected in the fifth cavity (375), the tooth-shaped end of the first strip-shaped push rod (45) is meshed with the second gear (41), and the first strip-shaped push rod (45) extends out of the box body (37) from the fifth cavity (375);
the second bar-shaped pushing rod (46) is slidably connected into the sixth cavity (376), the tooth-shaped end of the second bar-shaped pushing rod (46) is meshed with the third gear (43) and connected with the third gear, and the second bar-shaped pushing rod (46) extends out of the box body (37) from the sixth cavity (376).
8. A design method of a bridge elastic-plastic limiting, damping and energy dissipating device is characterized by comprising the following steps: step A1: determining an anti-seismic performance target and a checking and calculating criterion of the bridge;
step A2: calculating the elastic-plastic deformation value S of the elastic-plastic limiting damping energy dissipation column (3) and obtaining a force-displacement hysteresis curve of the elastic-plastic limiting damping energy dissipation column;
step A3: preselecting structural shape parameters of the elastic-plastic limiting damping energy-consuming column (3);
step A4: determining the maximum recovery capacity F of the elastic-plastic limiting damping energy-consuming column (3) according to the elastic-plastic deformation value of the elastic-plastic limiting damping energy-consuming column (3)α；
Step A5: calculating the proper size of the elastic-plastic limiting damping energy-consuming column (3) according to the maximum recovery capacity value of the elastic-plastic limiting damping energy-consuming column (3), if the size parameter of the preselected elastic-plastic limiting damping energy-consuming column (3) is met, performing the next step, and if the size parameter is not met, adjusting the preselected size parameter in the step A3;
step A6: simulating the force-displacement hysteresis curve in the step A2 into a full-bridge model, and checking whether the force-displacement hysteresis curve calculated theoretically meets the anti-seismic performance target and the checking and calculating criterion in the step A1;
step A7: and B, adjusting the elastic-plastic deformation value of the elastic-plastic limiting damping energy-consuming column (3) and the structural shape parameters of the elastic-plastic limiting damping energy-consuming column (3) according to the detection result in the step A6 until the anti-seismic performance target and the detection criterion in the step A1 are met.
9. The design method of the bridge elastic-plastic limit shock-absorbing and energy-dissipating device according to claim 8, wherein the elastic-plastic deformation value S in the step A2 is determined by the following steps:
step B1: determining the height H of the elastic-plastic limiting damping energy-consuming column (3), and dividing the height H into n heights H;
step B2: calculating the curvature omega of the section of the elastic-plastic limiting damping energy-consuming column (3) in the height hnElastic plasticCurvature omega of cross section of sexual spacing shock absorption energy dissipation column (3)nDetermined by the following equation:
wherein M is the maximum bending moment of the section of the elastic-plastic limiting damping energy-dissipating column (3), E is the elastic modulus, and sigma issIs the yield strain of the section of the elastic-plastic limiting damping energy-consuming column (3) in the height h, bnThe height of the section of the elastic-plastic limiting damping energy-consuming column (3) in the height h is shown, and A is the plastic height of the section of the limiting elastic-plastic limiting damping energy-consuming column (3);
step B3: through said curvature ωnCalculating the elastic-plastic deformation value S of the elastic-plastic limiting damping energy dissipation column (3):
wherein chi is the value of taking arbitrary height chi in the height H of the spacing shock attenuation power consumption post of elastoplasticity (3), i is the ith section in n height, i 1, 2, 3.
10. The design method of the elastic-plastic limit shock-absorbing and energy-dissipating device of the bridge according to claim 8, wherein the maximum recovery capacity F of the elastic-plastic limit shock-absorbing and energy-dissipating column (3) in the step A4αDetermined by the following equation:
wherein the content of the first and second substances,
as a function of the maximum recovery capacity F of the elastic-plastic limiting shock-absorbing energy-consuming column (3) with respect to the thickness t of the elastic-plastic limiting shock-absorbing energy-consuming column (3),
as a function of the maximum recovery capacity F of the elastoplastic limiting damping and energy dissipating device (3) with respect to the width w of the elastoplastic limiting damping and energy dissipating column (3),
representing a binary function fit, A1，A2，A3，a1，a2And taking values of parameters corresponding to the function table.
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Application publication date: 20210205 |