CN113833340B - Multiple energy consumption damper with energy consumption time sequence and optimization design method thereof - Google Patents
Multiple energy consumption damper with energy consumption time sequence and optimization design method thereof Download PDFInfo
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- CN113833340B CN113833340B CN202111190806.8A CN202111190806A CN113833340B CN 113833340 B CN113833340 B CN 113833340B CN 202111190806 A CN202111190806 A CN 202111190806A CN 113833340 B CN113833340 B CN 113833340B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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Abstract
The invention provides a multiple energy-consumption damper with an energy-consumption time sequence, which is formed by mechanically connecting an outer sleeve steel, an inner lining steel, a connecting piece and a core tube by using a high-strength bolt. The invention also provides an optimal design method of the multiple energy consumption damper with the energy consumption time sequence.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of dampers, in particular to a multiple energy consumption damper with an energy consumption time sequence and an optimization design method thereof.
[ background ] A method for producing a semiconductor device
The metal yielding damper is a damping energy dissipater made of mild steel or other soft metal materials in various forms. The metal has good hysteretic performance after yielding, and the elastic-plastic hysteretic deformation energy consumption of some metals is utilized, wherein the metals comprise a mild steel damper, a lead damper, a shape memory alloy damper and the like. The mechanism of controlling the vibration of the structure is to dissipate partial energy of the vibration of the structure through yield hysteresis loss energy of metal, so that the aim of reducing structural reaction is fulfilled, and the mild steel damper fully utilizes the good hysteresis characteristic of mild steel after the mild steel enters a plasticity stage. At present, the initial rigidity of a plurality of dampers is not large enough, the yield dispersion area of materials is not large enough, the design of an energy dissipation structure is not sufficient, the energy of the structure such as kinetic energy or elastic potential energy can not be fully converted into heat energy and the like to be dissipated, the integral rigidity of the building structure can be increased when the dampers are only normally used, but the requirements for reducing the earthquake reaction of the building structure can not be met by the dampers when a large earthquake occurs. Therefore, it is necessary to provide a multiple energy consumption damper with energy consumption sequence and an optimized design method thereof to solve the above problems.
[ summary of the invention ]
The invention discloses a multiple energy consumption damper with an energy consumption time sequence and an optimization design method thereof.
In order to realize the purpose, the technical scheme of the invention is as follows:
a multiple dissipative damper having a dissipative timing sequence, comprising:
the lining section steel encloses a built-in space;
the outer sleeve section steel is arranged around the lining section steel in a surrounding mode and forms a gap with the lining section steel at intervals;
the connecting piece is arranged in the gap and is used for connecting the lining section steel and the outer sleeve section steel;
a core section of thick bamboo, accept in the built-in space, the axis of a core section of thick bamboo, inside lining shaped steel and overcoat shaped steel is located same straight line, a core section of thick bamboo includes:
a central shaft;
the two pistons are arranged at two opposite ends of the central shaft, sleeved on the central shaft and capable of moving along the central shaft;
the elastic piece is sleeved on the central shaft and arranged between the two pistons;
the fixing piece is sleeved on the outer circumference of the piston and is welded and fixed with the piston;
anchor clamps, set up in the clearance and with through the fix with screw between the mounting, run through on the inside lining shaped steel and be provided with and dodge the slotted hole of screw, the extending direction of slotted hole with the axis direction of a core section of thick bamboo is parallel, the screw can be followed the extending direction rectilinear motion of slotted hole, anchor clamps are close to one side of overcoat shaped steel is close to the sunken draw-in groove that is formed with of inside lining shaped steel direction, the connecting piece is close to one side of inside lining shaped steel is close to the protruding dowel plate that is formed with of inside lining shaped steel direction, the dowel plate corresponds the card and locates in the draw-in groove.
Preferably, inside lining shaped steel includes inside lining shaped steel and lower inside lining shaped steel, it is close to go up inside lining shaped steel the one end of inside lining shaped steel is provided with first flange down, lower inside lining shaped steel is close to the one end of going up inside lining shaped steel is provided with second flange, first flange with second flange passes through spring bolt fastening and forms an organic whole.
Preferably, a first end bearing platform protrudes from the outer surface of the lining section steel towards the direction close to the outer sleeve section steel, a second end bearing platform protrudes from the inner surface of the outer sleeve section steel towards the direction close to the lining section steel, one end of the connecting piece is fixed with the first end bearing platform, the other end of the connecting piece is fixed with the second end bearing platform, the connecting piece is connected with the second end bearing platform through a high-strength bolt, a screw rod of the high-strength bolt sequentially penetrates through the outer sleeve section steel, the second end bearing platform and the connecting piece to realize the fixation of the outer sleeve section steel, and the head of the high-strength bolt is exposed out of the outer sleeve section steel.
Preferably, the connecting piece with the one side protrusion of second end bearing platform contact is formed with first sand grip, second end bearing platform with the one side protrusion of connecting piece contact is formed with the second sand grip, first sand grip with the second sand grip sets up in a staggered way and the cooperation forms friction pair.
Preferably, the connecting piece is a plate body made of a shape memory alloy material.
Preferably, the elastic member is a disc spring made of a shape memory alloy.
Preferably, the core cylinder is of a split structure and comprises an upper core cylinder and a lower core cylinder, wherein the upper core cylinder comprises an upper central shaft, an upper piston, an upper elastic part and an upper fixing part; the lower core barrel comprises a lower central shaft, a lower piston, a lower elastic piece and a lower fixing piece; the upper central shaft comprises an upper shaft body and an upper limiting plate arranged at one end of the upper shaft body; the lower central shaft comprises a lower shaft body and a lower limiting plate arranged at one end of the lower shaft body, the upper shaft body and the central axis of the lower shaft body are located on the same straight line, the upper limiting plate and the lower limiting plate are fixed, the upper elastic element clamp is arranged between the upper piston and the upper limiting plate, the lower elastic element clamp is arranged between the lower piston and the lower limiting plate, the upper limiting plate and the lower limiting plate are fixed, the upper fixing element is fixed to the upper piston, and the lower fixing element is fixed to the lower piston.
Preferably, the number of the clamps is even, the clamps comprise a first clamp and a second clamp, the first clamp and the second clamp respectively account for half of the total number of the clamps, and the first clamp is fixed with the upper fixing piece through the screw; the second clamp is fixed with the lower fixing piece through the screw, the two first clamps form a group, and the two first clamps in the group are symmetrically arranged around the central axis of the lining section steel; two the second anchor clamps form a set of, two in a set of the second anchor clamps are about the axis symmetry setting of inside lining shaped steel, the biography power board with anchor clamps one-to-one, the biography power board includes first biography power board and second biography power board, wherein first biography power board with first anchor clamps are connected, the second biography power board with the second anchor clamps are connected.
The invention also provides an optimal design method of the multiple energy consumption damper with the energy consumption time sequence, which comprises the following steps:
s1, establishing a finite element model of a multiple energy consumption damper with an energy consumption time sequence, and carrying out modal analysis on the finite element model to obtain elastic vibration characteristics of a first-order mode, wherein the elastic vibration characteristics comprise a period T, an effective mass M, a vibration mode participation coefficient gamma and a vibration mode vector gamma
；
S2: performing hysteresis push-cover analysis on the finite element model based on the lateral force distribution of the elastic vibration characteristic of the first-order mode to obtain hysteresis parameters of the model, wherein the hysteresis parameters comprise a first stiffness ratio alpha after yielding 1 Second stiffness ratio after yield alpha 2 The energy consumption coefficient beta and a self-reset threshold value xi;
s3: according to an energy balance principle, establishing an equivalent single-degree-of-freedom model for the finite element model, and acquiring an energy consumption capacity curve of the equivalent single-degree-of-freedom model; the energy consumption capacity of the equivalent single degree of freedom model is obtained by the sum of the absorption energy of each floor of the finite element model under the lateral force by using an increment method, and the formula is as follows:
W i ＝W i-1 +ΔW i
wherein F is a lateral force distribution vector of the finite element model, m is a mass matrix of the finite element model,
form vector, Δ W, of first order mode of finite element model i The work of the i-th step external load under the action of lateral force, W i Is the total amount of the step i;
s4: and calculating the displacement of the equivalent single-degree-of-freedom model based on energy by using an incremental method, wherein the formula is as follows:
in the formula (I), the compound is shown in the specification,
the displacement increment based on energy in the ith step of the equivalent single-degree-of-freedom model,
is the total amount of displacement of the ith step,
a base shear for the structure;
s5: selecting earthquake motion records meeting the site requirements according to earthquake design specifications, and obtaining the energy coefficient gamma and the peak acceleration M of the equivalent single-degree-of-freedom model of the structure under the earthquake motion action a Determining an energy demand curve of the finite element model by using the definition of the energy coefficient, wherein the calculation formula is as follows:
wherein, W d Energy requirement for finite element model, S v Pseudo velocity of the finite element model;
s6: drawing the energy consumption capacity curve and the energy demand curve of the finite element model in the same coordinate system to obtain an intersection point A, and comparing the abscissa x of the point A A And the magnitude of self-reset threshold xi, if X is the abscissa of A A If the self-reset threshold value xi is smaller than the self-reset threshold value xi, executing the step S7; if the abscissa x of A A If the self-reset threshold value xi is larger than the self-reset threshold value xi, executing the step S8;
s7: estimating the peak value interlayer displacement angle and the peak value acceleration response of each floor according to the first-order vibration mode vector, estimating the peak value interlayer displacement angle and the peak value acceleration response by combining the requirements of specifications and structural performance, and finishing optimization if the requirements are met; if not, executing step S8;
s8: adjusting performance parameters of the connecting piece to change damping coefficients and speed indexes of the multiple energy consumption dampers with energy consumption time sequences; modeling the multiple energy consumption dampers with the energy consumption time sequences after configuration optimization again, and turning to the step S1.
Compared with the prior art, the multiple energy-consuming damper with the energy-consuming time sequence is formed by mechanically connecting the outer sleeve section steel, the inner lining section steel, the connecting piece and the core tube through the high-strength bolt, and can absorb and dissipate more energy by utilizing the performance of the elastic piece in the connecting piece and the core tube, so that the multiple energy-consuming damper with the energy-consuming time sequence has the energy-consuming time sequence and also has the self-resetting capability. The invention also provides an optimization design method of the multiple energy consumption damper with the energy consumption time sequence, which utilizes the capacity curve and the demand curve of the multiple energy consumption damper with the energy consumption time sequence to carry out optimization pertinently.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic perspective view of a multiple energy-consuming damper with energy-consuming time sequence according to the present invention;
FIG. 2 isbase:Sub>A cross-sectional view of the multiple dissipative dampers with dissipative timing shown in FIG. 1 along line A-A;
FIG. 3 is a schematic structural view of the jacket-type steel;
FIG. 4 is a schematic view of a half-section structure of an upper lining section steel and a lower lining section steel;
FIG. 5 is an enlarged view of area B of FIG. 2;
FIG. 6 is an enlarged view of area C of FIG. 2;
FIG. 7 is an enlarged view of area D of FIG. 2;
FIG. 8 is a schematic structural diagram of the multiple energy-consuming damper with energy-consuming time sequence shown in FIG. 1 without the outer-casing steel;
fig. 9 is a structural schematic diagram of the core barrel.
Description of the reference numerals:
1-lining profile steel, 10-clearance, 1A-upper lining profile steel, 1B-lower lining profile steel, 11A-first connecting flange, 11B-second connecting flange, 11C-spring bolt, 12-first end bearing platform, 13-slotted hole, 2-coat profile steel, 21-second end bearing platform, 3-connecting piece, 31-force transmission plate, 4-core cylinder, 41-center shaft, 42-piston, 43-elastic piece, 44-fixed piece, 4A-upper core cylinder, 4B-lower core cylinder, 41A-upper center shaft, 42A-upper piston, 43A-upper elastic piece, 44-upper fixed piece, 41B-lower center shaft, 42B-lower piston, 43B-lower elastic piece, 44B-lower fixed piece, 411A-upper shaft body, 412A-upper limit plate, 411B-lower shaft body, 412B-lower limit plate, 5-high-strength bolt clamp groove, 6-clamp, 60-first clamp, 6A-first clamp, 6B-second clamp, 7-spring clamp, and 8-spring clamp.
[ detailed description ] A
The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
Referring to fig. 1-9, the present invention provides a multiple energy consumption damper with energy consumption timing sequence, which includes an inner lining steel 1, an outer sleeve steel 2, a connecting member 3 and a core tube 4.
The lining section steel 1 encloses a built-in space, and the outer sleeve section steel 2 is annularly arranged around the lining section steel 1 and forms a gap 10 with the lining section steel. The shape of the lining section steel 1 may be a cylindrical, triangular prism, quadrangular prism or other polygonal cylindrical structure, and the shape of the outer jacket section steel 2 may be a cylindrical, triangular prism, quadrangular prism or other polygonal cylindrical structure, which are combined and nested at will, which is not limited in this embodiment. Specifically, in this embodiment, the lining section steel 1 and the outer shell section steel 2 are both rectangular tubular structures, and four side walls of the lining section steel 1 and four side walls of the outer shell section steel 2 are parallel to each other in a one-to-one correspondence manner.
Inside lining shaped steel 1 includes inside lining shaped steel 1A and inside lining shaped steel 1B down, it forms an organic whole with the concatenation of inside lining shaped steel 1B down to go up inside lining shaped steel 1A. Specifically, it is close to go up inside lining shaped steel 1A the one end of inside lining shaped steel 1B is provided with first flange 11A down, inside lining shaped steel 1B is close to down the one end of going up inside lining shaped steel 1A is provided with second flange 11B, first flange 11A with second flange 11B passes through spring bolt 11C fastening and forms an organic whole. The lining section steel 1 is arranged to be of a split structure, and can be conveniently installed and detached on a construction site.
The connecting piece 3 is arranged in the gap 10 and is connected with the lining section steel 1 and the outer sleeve section steel 2. Furthermore, a first end bearing platform 12 is protruded from the outer surface of the lining section steel 1 towards the direction close to the outer sleeve section steel 2, a second end bearing platform 21 is protruded from the inner surface of the outer sleeve section steel 2 towards the direction close to the lining section steel 1, one end of the connecting piece 3 is fixed with the first end bearing platform 12, and the other end of the connecting piece is fixed with the second end bearing platform 21. First end bearing platform 12 set up, can make connecting piece 3 with 1 surface interval of inside lining shaped steel, second end bearing platform 21's setting can make connecting piece 3 with the internal surface interval of overcoat shaped steel 2 avoids connecting piece 3 with inside lining shaped steel 1 and the contact of overcoat shaped steel 3 influence connecting piece 3 deformation. The connecting piece 3 and the first end bearing platform 12 are fixed by bolts, and can be conveniently installed and detached. The first end support platform 12 may be disposed on the upper lining section steel 1A or disposed on the lower lining section steel 1B, which is not limited in this embodiment.
Further, connecting piece 3 with the one side protrusion of second end support platform 21 contact is formed with first sand grip, second end support platform 21 with the one side protrusion of connecting piece 3 contact is formed with the second sand grip, first sand grip with the second sand grip is crisscross to be set up and the cooperation forms the friction pair. Through the friction effect of the friction pair, the energy consumption effect can be achieved. The connecting piece 3 is connected with the second end bearing platform 21 through the high-strength bolt 5, a screw rod of the high-strength bolt 5 sequentially penetrates through the outer sleeve type steel 1, the second end bearing platform 21 and the connecting piece 3 to fix the outer sleeve type steel 1, the head of the high-strength bolt 5 is exposed out of the outer sleeve type steel 1, and the high-strength bolt 5 can be conveniently screwed in the installation process.
Preferably, the connecting member 3 may be selected to have an elastic structure, and the elasticity of the connecting member 3 may be utilized to dissipate energy. In the present embodiment, the connecting element 3 is a plate made of shape memory alloy material, which has elasticity and self-resetting capability. The number of the connecting pieces 3 is four, and one connecting piece 3 is arranged at each side wall of the lining section steel 1.
The core barrel 4 is accommodated in the built-in space, and the central axes of the core barrel 4, the lining section steel 1 and the outer sleeve section steel 2 are positioned on the same straight line.
The core tube 4 includes a central shaft 41, a piston 42, an elastic member 43, and a fixing member 44.
The number of the pistons 42 is two, the two pistons 42 are disposed at two opposite ends of the central shaft 41, and the pistons 42 are sleeved on the central shaft 41 and can move along the central shaft 41. The piston 42 is connected to an external load.
The elastic element 43 is sleeved on the central shaft 41 and disposed between the two pistons 42. Preferably, the elastic member 43 is a disc spring made of a shape memory alloy.
In the present embodiment, the core cylinder 4 is provided as a split structure, which includes an upper core cylinder 4A and a lower core cylinder 4B, wherein the upper core cylinder 4A includes an upper central shaft 41A, an upper piston 42A, an upper elastic member 43A, and an upper fixing member 44A; the lower core tube 4B includes a lower central shaft 41B, a lower piston 42B, a lower elastic member 43B, and a lower fixing member 44B. The upper central shaft 41A includes an upper shaft 411A and an upper limiting plate 412A disposed at one end of the upper shaft 411A; the lower central shaft 41B includes a lower shaft body 411B and a lower limiting plate 412B disposed at one end of the lower shaft body 411B. The central axes of the upper shaft body 411A and the lower shaft body 411B are located on the same straight line, and the upper limiting plate 412A and the lower limiting plate 412B are fixed. The upper elastic member 43A is interposed between the upper piston 42A and the upper limiting plate 412A, and the lower elastic member 43B is interposed between the lower piston 42B and the lower limiting plate 412B. The fixing members 44 are sleeved on the outer circumference of the piston 42 and are welded and fixed to the piston 42, and the fixing members 44 are arranged in one-to-one correspondence with the piston 42. In the present embodiment, the upper fixing member 44A is fixed to the upper piston 42A, and the lower fixing member 44B is fixed to the lower piston 42B.
Further, the multiple energy-consuming damper with the energy-consuming time sequence further comprises a clamp 6, the clamp 6 is arranged in the gap 10 and fixed to the fixing piece 44 through a screw 7, an oblong hole 13 for avoiding the screw 7 is formed in the lining section steel 1 in a penetrating mode, the extending direction of the oblong hole 13 is parallel to the central axis direction of the core cylinder 4, and the screw 7 can linearly move along the extending direction of the oblong hole 13.
Anchor clamps 6 are close to the one side of overcoat shaped steel 2 is to being close to the sunken draw-in groove 60 that is formed with of inside lining shaped steel 1 direction, connecting piece 3 is close to inside lining shaped steel 1 one side is to being close to inside lining shaped steel 1 direction protrusion is formed with biography power board 31, biography power board 31 corresponds the card and locates in the draw-in groove 60, draw-in groove 60 can be right biography power board 31 forms spacingly, simultaneously biography power board 31 with the cooperation structure of draw-in groove 60 can also play the biography power effect, passes through power through anchor clamps 6 conduct extremely on the core section of thick bamboo 4, through the elastic action of elastic component 43 consumes energy in the core section of thick bamboo 4, elastic component 43 adopts shape memory alloy material to make, when possessing elasticity, still possesses from the reset ability.
Further, the number of the jigs 6 is an even number, and the jigs include a first jig 6A and a second jig 6B, and each of the first jig 6A and the second jig 6B occupies half of the total number of the jigs 6. The first clamp 6A is fixed to the upper fixing member 44A by the screw 7; the second clamp 6B is fixed to the lower fixing member 44B by the screw 7.
The two first clamps 6A form a group, and the two first clamps 6A in the group are symmetrically arranged around the central axis of the lining section steel 1; the two second clamps 6B form a group, and the two second clamps 6B in the group are symmetrically arranged about the central axis of the lining steel 1.
In this embodiment, for the purpose of more clearly explaining the content of the present invention, four side walls of the upper lining section steel 1A and the lower lining section steel 1B are respectively defined as a first side wall, a second side wall, a third side wall and a fourth side wall in sequence in a clockwise direction, the first side wall, the second side wall, the third side wall and the fourth side wall are sequentially connected end to end, the first side wall and the third side wall are parallel, and the second side wall and the fourth side wall are parallel. The first clamp 6A is arranged on the outer surfaces of the first side wall and the third side wall of the upper lining section steel 1A, and the second clamp 6B is arranged on the outer surfaces of the second side wall and the fourth side wall of the lower lining section steel 1B. This arrangement allows the connecting elements 3A at the location of the first and third side walls to transmit forces to the upper elastic element 43A and the connecting elements 3B at the location of the second and fourth side walls to transmit forces to the lower elastic element 43B, whereby the resulting forces are all attributed to the core barrel 4, which takes on the main energy-consuming role of the core barrel 4. Two connecting pieces 3A located at the positions of the first side wall and the third side wall are symmetrically arranged, so that the stress balance of the two sides in the direction can be ensured, and two connecting pieces 3B located at the positions of the second side wall and the fourth side wall are symmetrically arranged, so that the stress balance of the two sides in the direction can be ensured.
Specifically, the installation process of the multiple energy-consuming damper with the energy-consuming time sequence provided by the invention is as follows:
(1) The upper elastic element 43A and the upper piston 42A are sleeved on the upper central shaft 41A in sequence to complete the assembly of the upper core tube 4A; the lower elastic piece 43B and the lower piston 42B are sequentially sleeved on the lower central shaft 41B to complete the assembly of the upper core tube 4B; aligning and fixing the upper limit plate 412A and the lower limit plate 412B to complete the assembly of the core barrel 4;
(2) Fixing the upper lining section steel 1A and the lower lining section steel 1B through spring bolts 8;
(3) Fixing the connecting member 3 to the first end support platform 12, then installing the clamp 6, aligning the clamping groove 60 with the dowel plate 31, and then fixing the clamp 6 and the fixing member 44 together through the screw 7;
(4) Sleeving the outer sleeve section steel 1 on the periphery of the inner lining section steel 1, and then fixing the connecting piece 3 and the second end support platform 21; and finally, connecting the two ends of the upper lining section steel 1A and the lower lining section steel 1B with the main body component respectively to finish the installation.
The use principle of the multiple energy-consuming damper with the energy-consuming time sequence provided by the invention is as follows:
the main body component is connected with the lining section steel 1, the pulling force is transmitted to the lining section steel 1, the force is transmitted to the outer sleeve section steel 2 through the force transmission effect of the connecting piece 3, the outer sleeve section steel 1 is pressed, and the friction side effect of the connecting piece 3 and the second end bearing platform 21 consumes energy for the first time through friction; when the tensile force is increased, the connecting piece 3 deforms to generate secondary energy consumption, at the moment, the force transmission plate 31 can drive the clamp to generate displacement, the screw 7 is driven to generate displacement in the long round hole 12, the piston 43 is driven to generate displacement along the central shaft 41, the piston 43 can drive the elastic piece 42 to synchronously generate movement through movement, and the third energy consumption is generated through the elastic action of the elastic piece 42. The three-time energy consumption is sequential, more energy can be absorbed and dissipated, and the connecting piece 3 and the elastic piece 42 are both made of shape memory alloy and have self-resetting capability.
The invention also provides an optimal design method of the multiple energy consumption damper with the energy consumption time sequence, which comprises the following steps:
s1, establishing a finite element model of a multiple energy consumption damper with an energy consumption time sequence, and carrying out modal analysis on the finite element model to obtain elastic vibration characteristics of a first-order mode, wherein the elastic vibration characteristics comprise a period T, an effective mass M, a vibration mode participation coefficient gamma and a vibration mode vector gamma
；
S2: performing hysteresis push-cover analysis on the finite element model based on the lateral force distribution of the elastic vibration characteristic of the first-order mode to obtain a hysteresis parameter of the model, wherein the hysteresis parameter comprises a first stiffness ratio alpha after yielding 1 Second stiffness ratio after yield alpha 2 The energy consumption coefficient beta and the self-reset threshold xi;
s3: according to an energy balance principle, establishing an equivalent single-degree-of-freedom model for the finite element model, and acquiring an energy consumption capacity curve of the equivalent single-degree-of-freedom model; the energy consumption capacity of the equivalent single-degree-of-freedom model is obtained by the sum of the absorption energy of each floor of the finite element model under the lateral force by an incremental method, and the formula is as follows:
W i ＝W i-1 +ΔW i
wherein F is a lateral force distribution vector of the finite element model, m is a mass matrix of the finite element model,
form vector, Δ W, of first order mode of finite element model i The work done by the i-th step external load under the action of lateral force, W i Is the total amount of the step i;
s4: and calculating the displacement of the equivalent single-degree-of-freedom model based on energy by using an incremental method, wherein the formula is as follows:
in the formula (I), the compound is shown in the specification,
for the displacement increment based on energy in the step i of the equivalent single degree of freedom model,
is the total amount of displacement of the ith step,
a base shear for the structure;
s5: selecting earthquake motion records meeting the site requirements according to earthquake design specifications, and obtaining the energy coefficient gamma and the peak acceleration M of the equivalent single-degree-of-freedom model of the structure under the earthquake motion action a Determining an energy demand curve of the finite element model by using the definition of the energy coefficient, wherein the calculation formula is as follows:
wherein, W d Energy requirement for finite element model, S v Pseudo velocity of the finite element model;
s6: drawing the energy consumption capacity curve and the energy demand curve of the finite element model in the same coordinate system to obtain an intersection point A, and comparing the abscissa x of the point A A And the magnitude of the self-reset threshold xi, if X is the abscissa of A A If the self-reset threshold value xi is smaller than the self-reset threshold value xi, executing the step S7; if the abscissa x of A A If the self-reset threshold value xi is larger than the self-reset threshold value xi, executing the step S8;
s7: estimating the peak value interlayer displacement angle and the peak value acceleration response of each floor according to the first-order vibration mode vector, estimating the peak value interlayer displacement angle and the peak value acceleration response by combining the requirements of specifications and structural performance, and finishing optimization if the requirements are met; if not, executing step S8;
s8: adjusting performance parameters of the connecting piece to change damping coefficients and speed indexes of the multiple energy consumption dampers with energy consumption time sequences; modeling the multiple energy consumption dampers with the energy consumption time sequences after configuration optimization again, and turning to the step S1.
Compared with the prior art, the multiple energy-consuming damper with the energy-consuming time sequence is formed by mechanically connecting the outer sleeve section steel, the inner lining section steel, the connecting piece and the core tube through the high-strength bolt, and can absorb and dissipate more energy by utilizing the performance of the elastic piece in the connecting piece and the core tube, so that the multiple energy-consuming damper with the energy-consuming time sequence has the energy-consuming time sequence and also has the self-resetting capability. The invention also provides an optimization design method of the multiple energy consumption damper with the energy consumption time sequence, which utilizes the capacity curve and the demand curve of the multiple energy consumption damper with the energy consumption time sequence to carry out optimization pertinently.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and these embodiments are therefore considered to be within the scope of the invention.
Claims (9)
1. A multiple dissipative damper having a dissipative timing sequence, comprising:
the lining section steel surrounds a built-in space;
the outer sleeve section steel is arranged around the lining section steel in a surrounding way and forms a gap with the lining section steel at intervals;
the connecting piece is arranged in the gap and is used for connecting the lining section steel and the outer sleeve section steel;
a core barrel housed in the built-in space, the core barrel including:
a central shaft;
the two pistons are arranged at the two opposite ends of the central shaft, and the pistons are sleeved on the central shaft and can move along the central shaft;
the elastic piece is sleeved on the central shaft and arranged between the two pistons;
the fixing piece is sleeved on the outer circumference of the piston and is welded and fixed with the piston;
the clamp is arranged in the gap and fixed with the fixing piece through a screw, a long round hole for avoiding the screw penetrates through the lining section steel, the extending direction of the long round hole is parallel to the central axis direction of the core cylinder, the screw can linearly move along the extending direction of the long round hole, one surface, close to the outer sleeve section steel, of the clamp is recessed towards the direction close to the lining section steel to form a clamping groove, one surface, close to the lining section steel, of the connecting piece is protruded towards the direction close to the lining section steel to form a force transmission plate, and the force transmission plate is correspondingly clamped in the clamping groove;
the inner surface of the outer sleeve section steel protrudes towards the direction close to the lining section steel to form a second end bearing platform; the connecting piece with the one side protrusion of second end bearing platform contact is formed with first sand grip, second end bearing platform with the one side protrusion of connecting piece contact is formed with the second sand grip, first sand grip with the crisscross setting of second sand grip and cooperation form friction pair.
2. The multiple energy consumption damper with energy consumption timing sequence according to claim 1, wherein the central axes of the core tube, the lining section steel and the outer sleeve section steel are positioned on the same straight line.
3. The multiple energy consumption damper with energy consumption timing sequence according to claim 1, wherein the lining section steel comprises an upper lining section steel and a lower lining section steel, one end of the upper lining section steel close to the lower lining section steel is provided with a first connecting flange, one end of the lower lining section steel close to the upper lining section steel is provided with a second connecting flange, and the first connecting flange and the second connecting flange are fastened into a whole through spring bolts.
4. The multiple energy consumption damper with energy consumption time sequence according to claim 3, wherein a first end bearing platform protrudes from the outer surface of the lining section steel towards the direction close to the outer sleeve section steel, one end of the connecting piece is fixed with the first end bearing platform, the other end of the connecting piece is fixed with the second end bearing platform, the connecting piece is connected with the second end bearing platform through a high-strength bolt, a screw rod of the high-strength bolt sequentially penetrates through the outer sleeve section steel, the second end bearing platform and the connecting piece to fix the outer sleeve section steel, and the head of the high-strength bolt is exposed out of the outer sleeve section steel.
5. The multiple energy consuming damper with energy consuming timing sequence of claim 1, wherein the connecting member is a plate made of shape memory alloy material.
6. The multiple dissipative damper with dissipative timing according to claim 1, wherein the resilient member is a disc spring made of shape memory alloy.
7. The multiple dissipative damper with dissipative timing as claimed in claim 1, wherein said core cylinder is provided in a split configuration comprising an upper core cylinder and a lower core cylinder, wherein said upper core cylinder comprises an upper central shaft, an upper piston, an upper elastic member and an upper fixed member; the lower core barrel comprises a lower central shaft, a lower piston, a lower elastic part and a lower fixing part; the upper central shaft comprises an upper shaft body and an upper limiting plate arranged at one end of the upper shaft body; the lower central shaft comprises a lower shaft body and a lower limiting plate arranged at one end of the lower shaft body, the upper shaft body and the lower shaft body are located on the same straight line, the upper limiting plate and the lower limiting plate are fixed, the upper elastic element is clamped between the upper piston and the upper limiting plate, the lower elastic element is clamped between the lower piston and the lower limiting plate, the upper limiting plate and the lower limiting plate are fixed, the upper fixing piece and the upper piston are fixed, and the lower fixing piece and the lower piston are fixed.
8. The multiple dissipative dampers according to claim 7, wherein the number of the clamps is an even number, and comprises a first clamp and a second clamp, each of the first clamp and the second clamp is half of the total number of the clamps, the first clamp is fixed to the upper fixing member by the screw; the second clamp is fixed with the lower fixing piece through the screw, the two first clamps form a group, and the two first clamps in the group are symmetrically arranged around the central axis of the lining section steel; two the second anchor clamps form a set of, two in a set of the second anchor clamps about the axis symmetry of inside lining shaped steel sets up, biography power board with the anchor clamps one-to-one, the biography power board includes first biography power board and second biography power board, wherein first biography power board with first anchor clamps are connected, second biography power board with the second anchor clamps are connected.
9. A method for optimizing design of multiple energy-consuming dampers with energy-consuming time sequence according to any of claims 1-8, comprising the steps of:
s1, establishing a finite element model of a multiple energy consumption damper with an energy consumption time sequence, and carrying out modal analysis on the finite element model to obtain elastic vibration characteristics of a first-order mode, wherein the elastic vibration characteristics comprise a period T, an effective mass M, a vibration mode participation coefficient gamma and a vibration mode vector gamma
S2: performing hysteresis push-cover analysis on the finite element model based on the lateral force distribution of the elastic vibration characteristic of the first-order mode to obtain hysteresis parameters of the model, wherein the hysteresis parameters comprise a first stiffness ratio alpha after yielding 1 Second stiffness ratio after yield alpha 2 The energy consumption coefficient beta and the self-reset threshold xi;
s3: according to an energy balance principle, establishing an equivalent single-degree-of-freedom model for the finite element model, and acquiring an energy consumption capacity curve of the equivalent single-degree-of-freedom model; the energy consumption capacity of the equivalent single degree of freedom model is obtained by the sum of the absorption energy of each floor of the finite element model under the lateral force by using an increment method, and the formula is as follows:
W i ＝W i-1 +ΔW i
wherein F is the lateral force distribution vector of the finite element model, m is the mass matrix of the finite element model,
form vector, Δ W, of first order mode of finite element model i The work done by the i-th step external load under the action of lateral force, W i Is the total amount of the step i;
s4: and calculating the displacement of the equivalent single-degree-of-freedom model based on energy by using an incremental method, wherein the formula is as follows:
in the formula,. DELTA.x e i For the ith step of the equivalent single-degree-of-freedom model, the displacement increment, x, based on energy e i Is the total displacement of the ith step, V b i A base shear for the structure;
s5: selecting earthquake motion records meeting the site requirements according to earthquake-resistant design specifications, and obtaining an energy system of the equivalent single-degree-of-freedom model of the structure under the action of earthquake motionNumber gamma and peak acceleration M a Determining an energy demand curve of the finite element model by using the definition of the energy coefficient, wherein the calculation formula is as follows:
wherein, W d Energy requirement for finite element model, S v Is the pseudo velocity of the finite element model;
s6: drawing the energy consumption capacity curve and the energy demand curve of the finite element model in the same coordinate system to obtain an intersection point A, and comparing the abscissa x of the point A A And the magnitude of the self-reset threshold xi, if X is the abscissa of A A If the self-reset threshold value xi is smaller than the self-reset threshold value xi, executing the step S7; if the abscissa x of A A If the self-reset threshold value xi is larger than the self-reset threshold value xi, executing the step S8;
s7: estimating the peak value interlayer displacement angle and the peak value acceleration response of each floor according to the first-order vibration mode vector, estimating the peak value interlayer displacement angle and the peak value acceleration response by combining the requirements of specifications and structural performance, and finishing optimization if the requirements are met;
if not, executing step S8;
s8: adjusting performance parameters of the connecting piece to change the damping coefficient and the speed index of the multiple energy consumption damper with the energy consumption time sequence; modeling the multiple energy consumption dampers with the energy consumption time sequences after configuration optimization again, and turning to the step S1.
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| CN213926837U (en) * | 2020-09-21 | 2021-08-10 | 重庆大学 | Variable friction force and multi-stage energy consumption based damper and beam column node |
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