CN103838918A - Value obtaining method-comprehensive method of additional effective damping ratios of energy dissipaters with energy dissipation and shock absorption structures - Google Patents
Value obtaining method-comprehensive method of additional effective damping ratios of energy dissipaters with energy dissipation and shock absorption structures Download PDFInfo
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Abstract
The invention discloses a value obtaining method-comprehensive method of the additional effective damping ratios of energy dissipaters with energy dissipation and shock absorption structures. The method comprises the steps of extracting inter-floor shear force values Fit and inter-floor displacement values uit corresponding to seismic wave moment points after the energy dissipation and shock absorption structures are subjected to finite element elastic-plastic time-history analysis; obtaining total strain energy Wst of the energy dissipation and shock absorption structures at the seismic wave moment points and getting a maximum value max[Wst] of the total strain energy Wst; obtaining the sum Sigma Wcj of dissipative energy of all of energy dissipaters; performing calculation to obtain the additional effective damping ratios 8 a of the energy dissipaters with the energy dissipation and shock absorption structures; assessing whether the additional effective damping ratios 8 a of the energy dissipaters are larger than or equal to additional effective damping ratios set for performance objectives of the energy dissipation and shock absorption structures. In the method, the number and the positions of the energy dissipaters are constantly optimized in the accurate computation result obtaining process, the energy dissipaters are appropriate in selection and arrangement, the economic purpose is achieved while the requirement for dissipating seismic energy to the most extent is met, and the construction cost is reduced.
Description
Technical field
The present invention relates to structure with energy dissipation devices and analytical technology in building structure technology field, particularly relate to the obtaining value method-overall approach of the additional effective damping ratio of a kind of energy-dissipating and shock-absorbing structure sinker.
Background technology
The antidetonation of traditional architecture structure mainly occurs damaging earthquake energy by structure and member in earthquake, and the badly damaged of structure and member is exactly conversion or the consumption process of seismic energy.In recent years, along with China's earthquake takes place frequently, cause building structure subject to severe risks of damage, endangering people's life and property safety.Owing at present the mechanism of structure " firmly anti-" earthquake being difficult to arrive effective control requirement, therefore mode-energy-dissipating and shock-absorbing technology widespread use gradually in building structure of " soft anti-" earthquake, it has great significance to complicated building structure and lifeline engineering.
Energy-dissipating and shock-absorbing technology is a kind of dissipate Passive Control technology of seismic energy of sinker that arranges in building structure.Energy-dissipating and shock-absorbing structure comprises agent structure and energy dissipation component, and energy dissipation component is made up of with the member that is connected sinker for agent structure sinker.Sinker by internal material or and member between friction, utilize elastoplasticity hysteresis distortion or glutinous (bullet) property hysteresis to be out of shape to dissipate or absorb seismic energy.In brief, energy-dissipating and shock-absorbing technology is exactly, by some position in building structure, sinker is set, and be out of shape to dissipate or absorb the energy of earthquake input structure by it, to reduce the impact on agent structure, thus protection agent structure.Conventional sinker has displacement relationship type sinker, velocity correlation type sinker and compound sinker etc.
In structure with energy dissipation devices, key is to give full play to the energy dissipation behavior of sinker, and this just requires reasonable selection and arranges sinker, and the technical indicator of measurement sinker energy dissipation capacity is exactly the additional effective damping ratio of sinker.China's " seismic design provision in building code " (hereinafter to be referred as " anti-rule ") has provided definite principle and the principle of the additional effective damping ratio of sinker, it is from energy point of view, after additional effective damping ratio adopts sinker to produce energy that deformation absorbs and sinker is set under geological process the total seismic deformation of building structure can ratio characterize, its estimation equation is:
ξ
a=Σ W
cj/ (4 π W
s) (formula 1)
In formula: ξ
afor the additional effective damping ratio of sinker; W
cjbe that j sinker is at structure expection relative storey displacement Δ u
jthe energy that lower reciprocation cycle consumes for one week; W
sfor structure that sinker the is set total strain energy under expection displacement.
While disregarding torsion effect, the total strain energy W of energy-dissipating and shock-absorbing structure under horizontal earthquake action
s, can estimate by following formula: W
s=(1/2) Σ F
iu
i(formula 2)
In formula: F
ifor the horizontal earthquake action standard value of particle i, u
ifor the displacement of the corresponding horizontal earthquake action standard value of particle i.
Displacement relationship type and speed nonlinear dependence type sinker reciprocal energy consuming for a week under horizontal earthquake action, can estimate by following formula:
W
cj=A
j(formula 3)
In formula: A
jbe that the restoring force hysteretic loop of j sinker is at relative level displacement u
jtime area.
Visible, adopting the rationally additional effective damping ratio of the sinker of exploitation method calculating is reliably to weigh sinker in energy-dissipating and shock-absorbing structure to select and arrange proper foundation, but, how the concrete exploitation method, especially the energy-dissipating and shock-absorbing structure that in " anti-rule ", do not provide additional effective damping ratio select appropriate part also not provide relevant teachings after elasto-plastic time history analysis from numerous and complicated data.And the exploitation method of the additional effective damping ratio of sinker has also only been mentioned the computing method-envelope method of envelope in " building energy-dissipating and shock-absorbing technical regulation " JGJ297-2013:
(1) in the elasto-plastic time history analysis of energy-dissipating and shock-absorbing structure, calculate the total strain energy of energy-dissipating and shock-absorbing structure under expection displacement, the each floor that is agent structure is assumed in the situation of rigidity floor, extracts each floor interlaminar shear maximal value as its F from finite element software
ivalue, each floor emergent interlayer displacement maximum values is as u
i, calculate Ws value according to formula 2;
The restoring force hysteretic loop of (2) j sinker is at relative level displacement u
jtime area be A
j, extract hysteresis loop FEM data, and calculate its maximum hysteresis circle area and be A
j, obtain Σ W by summation
cj;
(3) by the Ws drawing above and Σ W
cj, calculate the additional effective damping ratio of sinker according to formula 1.
But, variable resistance Buddhist nun when the additional effective damping of sinker is in energy-dissipating and shock-absorbing structure, the additional damping of each energy-dissipating and shock-absorbing structure is a time-varying parameter, and energy-dissipating and shock-absorbing structure in the time of elasto-plastic time history analysis, its response is along with the variation of seismic event acceleration changes, this has time variation with regard to the power consumption that makes sinker.And while adopting envelope method computation structure strain energy, the maximal value that earthquake response is all got in floor shearing and floor displacement, so it is envelope value that strain energy is calculated gained, sinker power consumption is to get hysteresis loop outermost one to enclose area value, the value of getting is the sinker actual envelope value that consumes energy, therefore, although the computation process of envelope method is simple and convenient, but comparison of computational results is conservative, and accuracy is poor.
How after the elasto-plastic time history analysis of energy-dissipating and shock-absorbing structure finite element, the additional effective damping ratio of sinker to be adopted to rational exploitation method, to obtain adding comparatively accurately effective damping ratio, thereby further optimizing layout and the quantity of sinker, is current structure with energy dissipation devices and analysis field technical barrier urgently to be resolved hurrily.
Summary of the invention
The object of the present invention is to provide a kind of obtaining value method-overall approach that can improve result of calculation accuracy, position to sinker and quantity and be optimized the additional effective damping ratio of energy-dissipating and shock-absorbing structure sinker that reduces cost.
Object of the present invention realizes by the following technical solutions: the obtaining value method-overall approach of the additional effective damping ratio of a kind of energy-dissipating and shock-absorbing structure sinker, specifically comprises the following steps:
(1) energy dissipating shock-damping structure is carried out to finite element elasto-plastic time history analysis, first on finite element simulation calculation platform, set up the finite element model of agent structure, on the finite element model of agent structure, weight application load, reloads seismic event;
(2) according to the relative storey displacement of each floor of agent structure and interlayer rigidity, tentatively determine quantity and the position of sinker, sinker is arranged in the finite element model of agent structure, form the finite element model of energy-dissipating and shock-absorbing structure;
(3) weight application load on the finite element model of energy-dissipating and shock-absorbing structure, reloads seismic event;
(4) calculate the total strain energy of energy-dissipating and shock-absorbing structure under expection displacement, each floor of supposing agent structure is rigidity floor, extracts the floor interlaminar shear value F corresponding to the each moment point of seismic event
itwith floor relative storey displacement value u
it;
(5) by by (4) each floor interlaminar shear value F of the synchronization point of gained of step
itwith each floor relative storey displacement value u
itmultiply each other, after the summation of the product value of all moment point to gained, get its 1/2, obtain the total strain energy Wst of energy-dissipating and shock-absorbing structure in the each moment point of seismic event, and get the maximal value max[Wst of total strain energy Wst];
(6) analysis obtains each sinker and enters the hysteresis loop of surrendering the power consumption stage, calculates the maximum hysteresis circle of each hysteresis loop area A
j, as the dissipation energy of each sinker, then dissipation energy summation to each sinker, obtain the summation Σ W of the dissipation energy of whole sinkers
cj;
(7) according to following formula:
ξ
a＝ΣW
cj/(4π·max[W
st])
Calculate the additional effective damping ratio § of energy-dissipating and shock-absorbing structure sinker
a;
(8) evaluate the additional effective damping ratio § of the sinker (7) being obtained by step
awhether be more than or equal to the additional effective damping ratio of energy-dissipating and shock-absorbing structural behaviour goal-setting;
The additional effective damping ratio § of the sinker obtaining a) in this way,
aas the additional effective damping ratio of definite sinker;
B) if not, enter step (9);
(9) adjust quantity and the position of sinker, then repeating step (4)～(8), until make the additional effective damping ratio § of sinker
atill being more than or equal to the additional effective damping ratio of energy-dissipating and shock-absorbing structural behaviour goal-setting, finally determine the additional effective damping ratio of sinker.
Step of the present invention (8) described energy-dissipating and shock-absorbing structural behaviour goal-setting additional effective damping ratio be the additional effective damping ratio of sinker target definite in anti-seismic performanceization design, it derives from the design document of Performance Design target; Seismic event is provided by An Ping unit, and it is documented in during peace Commentary Report accuses, all on the books when each moment point of seismic event, peak value, spectral characteristic, earthquake motion are held etc.; Gravity laod generally comprises dead load, mobile load and prestress, can load as the case may be.
The present invention carries out after finite element elasto-plastic time history analysis in energy-dissipating and shock-absorbing structure, all the summation Σ W of the dissipation energy of sinker
cjemploying envelope method calculates, Ws is by first calculating the total strain energy Wst of energy-dissipating and shock-absorbing structure in the each moment point of seismic event, and the maximal value of getting Wst obtains, thereby obtain the additional effective damping ratio of energy-dissipating and shock-absorbing structure sinker, and by repeatedly adjusting quantity and the position of sinker, obtain than existing envelope method result of calculation comparatively accurately, in the process that obtains result of calculation accurately, constantly the quantity to sinker and position are optimized in the present invention, make sinker select and arrange proper, in the requirement that meets the seismic energy that dissipates more, realize the object of economy, reduce construction costs cost.With envelope principle of design and counting yield, can suitably adopt the present invention to calculate additional effective damping ratio.
As one embodiment of the present invention, step (6) in, the dissipation energy of each sinker obtains by the hysteretic behavior analysis of each sinker of setting up on finite element simulation calculation platform.
The present invention step (7) in, if the additional effective damping ratio § of sinker
aexceed 25%, with 25% value.According to " anti-rule ", when the additional effective damping ratio of sinker exceedes 25%, should press 25% value.
As a kind of preferred implementation of the present invention, described seismic event is at least three, and described seismic event is natural ripple or artificial ripple, and the quantity of described natural ripple is taken up an area 2/3 of seismic wave sum, and the quantity of described artificial ripple is taken up an area 1/3 of seismic wave sum.
The present invention can have following embodiment, and in the time loading seismic event, the amplitude of seismic event principal direction, inferior direction and Z-direction loads according to 1:0.85:0.65 three-dimensional." building energy-dissipating and shock-absorbing technical regulation " stipulates the concrete load mode of seismic event.
Compared with prior art, the present invention has following significant effect:
(1) the present invention carries out after finite element elasto-plastic time history analysis in energy-dissipating and shock-absorbing structure, all the summation Σ W of the dissipation energy of sinker
cjemploying envelope method calculates, Ws is by first calculating the total strain energy Wst of energy-dissipating and shock-absorbing structure in the each moment point of seismic event, and the maximal value of getting Wst obtains, thereby obtain the additional effective damping ratio of energy-dissipating and shock-absorbing structure sinker, and by repeatedly adjusting quantity and the position of sinker, obtain than the existing envelope method additional effective damping ratio of sinker comparatively accurately, it belongs to the additional effective damping ratio of one direction (principal direction of seismic event).
(2) result of calculation obtains according to kind of the Simulating Seismic Wave of table 2～4 three in embodiment below, calculate income value and more approach actual value, comparatively accurate, the present invention is under the prerequisite that meets safety requirements, than passing through the quantity of envelope method calculative determination sinker, can save approximately 30% sinker, the cost of sinker also can reduce approximately 30%.Therefore, good economy performance, can significantly reduce the use cost of sinker.
(3) the present invention can be optimized the quantity of sinker and position according to result of calculation accurately, makes sinker select and arrange properly, realizes the object of economy in the requirement that meets the seismic energy that dissipates more.
(4) with envelope principle of design and counting yield, all can suitably adopt the present invention to calculate additional effective damping ratio in the structure item operation phase.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is sinker plane of arrangement figure of the present invention;
Fig. 2 is that sinker of the present invention is arranged elevation drawing;
Fig. 3 is sinker arrangement figure of the present invention;
Fig. 4 is that seismic event is the acceleration-time curve figure of natural ripple one;
Fig. 5 is that seismic event is the acceleration-time curve figure of natural ripple two;
Fig. 6 is that seismic event is the acceleration-time curve figure of artificial ripple;
Fig. 6 a is the natural ripple hysteresis loop figure of sinker once;
Fig. 7 is that once structural strain can be with time-histories change curve for natural ripple;
Fig. 8 is two times 0～6.6s structural strain energy change curves of natural ripple;
Fig. 9 is that two times structural strains of natural ripple can be with time-histories change curve;
Figure 10 is 0～2.6s structural strain energy change curve under artificial ripple;
Figure 11 is that under artificial ripple, structural strain can be with time-histories change curve;
Figure 12 be natural ripple once BRB structure, adopt envelope method and floor interlaminar shear change curve of the present invention respectively;
Figure 13 be natural ripple once BRB structure, adopt envelope method and floor relative storey displacement of the present invention angle change curve respectively;
Figure 14 is two times BRB structures of natural ripple, adopts envelope method and floor interlaminar shear change curve of the present invention respectively;
Figure 15 is two times BRB structures of natural ripple, adopts envelope method and floor relative storey displacement of the present invention angle change curve respectively;
Figure 16 is BRB structure under artificial ripple, adopts envelope method and floor interlaminar shear change curve of the present invention respectively;
Figure 17 is BRB structure under artificial ripple, adopts envelope method and floor relative storey displacement of the present invention angle change curve respectively.
Embodiment
As shown in Figures 1 to 3, in the present embodiment, structural steelwork is for being with huge transfer truss-Steel frame-brace barrel structure, the about 100m of building height, plane is three-back-shaped, is of a size of 100m × 100m, and structure depth-width ratio is 100/69.6=1.44, main building adopts the support tube 1 that 4 horizontal sections are L-type to form vertical supporting system, and support tube 1 is near architectural plane corner arrangement.L-type support tube 1 is of a size of 18m × 18m, structural span 33.6m between support tube 1, this structure L-type support tube 1 outside arranges that corresponding BRB(is the one of displacement relationship type sinker) form BRB energy-dissipating and shock-absorbing structure, specifically BRB is arranged between the cylinder 11 and beam 12 of L-type support tube.Earthquake resistant engineering fortification intensity is 7 degree, III class place, classification of design earthquake is the 1st group, basic seismic design accekeration is 0.1g, eigenperiod 0.45s, peace comments that be provided eigenperiod is 0.48s, the standard that is categorized as of the providing fortification against earthquakes class of setting up defences.
BRB all can reach surrender in the time of tension and pressurized and flexing not can have high rigidity and good hysteretic energy ability through appropriate design, and has concentric diagonal brace and hysteretic energy element feature.The general layout principle of the present embodiment BRB and the arrangement principle of common support are similar: as shown in Figure 1, in floor plan, the layout of BRB makes structure close in the kinematic behavior of two major axes orientations, makes the mass centre of structure overlap with center of rigidity as far as possible, reduces to reverse earthquake sheet; As shown in Figure 2, be set up at facade cloth, avoid, because local rigidity weakens or sudden change formation weak part, causing excessive stress to concentrate or concentration of plastic deformation.The present embodiment is selected two kinds of model BRB, selects yield strength to be the buckling-restrained energy-dissipation of 235Mpa, and yield tensile ratio is 0.8, and design parameter is as shown in table 1:
(table 1)
Two kinds of model BRB are arranged in the L-type support tube outside of one deck, two layers and girders layer and above 7 layers, adopt inverted v-shaped to arrange.
Obtaining value method-the overall approach of the additional effective damping ratio of a kind of energy-dissipating and shock-absorbing structure of the present invention sinker, specifically comprises the following steps:
(1) energy dissipating shock-damping structure is carried out to finite element elasto-plastic time history analysis, first on finite element simulation calculation platform, set up the finite element model of agent structure, on the finite element model of agent structure, weight application load, reloads seismic event;
(2) according to the relative storey displacement of each floor of agent structure and interlayer rigidity, tentatively determine quantity and the position of sinker, sinker is arranged in the finite element model of agent structure, form the finite element model of energy-dissipating and shock-absorbing structure;
(3) weight application load on the finite element model of energy-dissipating and shock-absorbing structure, reloads seismic event;
(4) calculate the total strain energy of energy-dissipating and shock-absorbing structure under expection displacement, each floor of supposing agent structure is rigidity floor, extracts the floor interlaminar shear value F corresponding to the each moment point of seismic event
itwith floor relative storey displacement value u
it;
Finite element elasto-plastic time history analysis is on finite element simulation calculation platform, to set up finite element model to carry out analytical calculation.Specifically adopt common finite element software Midas/gen to carry out dynamic elastic-plastic time-history analysis under rarely occurred earthquake.The Plastic Damage of structural elements adopts plastic hinge to simulate, and structure upper body structure is steel construction, and the members such as beam column diagonal brace are adopted and concentrate hinge model.When rarely occurred earthquake, the damping ratio of this agent structure gets 0.05.
Time-history analysis under the effect of the present embodiment rarely occurred earthquake adopts natural ripple one (ChiCHi), natural ripple two (Landers) and the artificial ripple (acce2) that An Ping unit provides to carry out dynamic elastic-plastic time-history analysis, consider calculated amount and model computing time of elasto-plastic time history analysis, each seismic event all intercepts the front 15s of its seismic acceleration peak point to the moment point between rear 5s, amount to 20s, only at structure X to applying geological process.In analysis, applying with the input of seismic event of gravity laod carried out in two steps: the first step, weight application load (1.0 mobile load+1.0, dead load+0.5 prestress); Second step, applies X to geological process, and principal direction (X to) acceleration amplitude is 220gal, and the acceleration-time curve of natural ripple one is referring to Fig. 4, and the acceleration-time curve of natural ripple two is referring to Fig. 5, and the acceleration-time curve of artificial ripple is referring to Fig. 6.
Seismic event difference, it is also not identical that BRB enters power consumption state, and under the effect of ChiChi ripple, to enter power consumption state minimum for BRB, and artificial ripple is made used time BRB, and to enter power consumption state maximum.
(5) by by (4) each floor interlaminar shear value F of the synchronization point of gained of step
itwith each floor relative storey displacement value u
itmultiply each other, after the summation of the product value of all moment point to gained, get its 1/2, obtain the total strain energy Wst of energy-dissipating and shock-absorbing structure in the each moment point of seismic event, and get the maximal value max[Wst of Wst];
(6) the restoring force hysteretic behavior of BRB is generally got the linear hysteretic behavior of symmetric double of tension and compression equal stiffness, its W
cjcan be taken as A by " anti-rule "
j, be that the restoring force hysteretic loop of j sinker is at relative level displacement u
jtime area, analyze the BRB hysteresis loop that obtains each sinker and enter the surrender power consumption stage, as shown in Figure 6 a, next root BRB hysteresis loop of ChiChi ripple effect, in known this structure, BRB enters power consumption states with time-delay to return curve comparatively symmetrical full; Calculate respectively the maximum hysteresis circle of each BRB hysteresis loop area A
j, as the dissipation energy of each sinker, then dissipation energy summation to each sinker, obtain the summation Σ W of the dissipation energy of whole sinkers
cj;
(7) according to following formula:
ξ
a＝ΣW
cj/(4π·max[W
st])
Calculate the additional effective damping ratio § of energy-dissipating and shock-absorbing structure sinker
a.
(8) evaluate the additional effective damping ratio § of the sinker (7) being obtained by step
awhether be more than or equal to the additional effective damping ratio of energy-dissipating and shock-absorbing structural behaviour goal-setting;
The additional effective damping ratio § of the sinker obtaining b) in this way,
aas the additional effective damping ratio of definite sinker;
B) if not, enter step;
(9) adjust quantity and the position of sinker, then repeating step (4)～(8), until make the additional effective damping ratio § of sinker
atill being more than or equal to the additional effective damping ratio of energy-dissipating and shock-absorbing structural behaviour goal-setting, finally determine the additional effective damping ratio of sinker.
As shown in Figure 7, seismic event is natural ripple one: structural strain energy maximal value is 1.7150E+07kNmm, occur in the 8.84s of ChiChi ripple, BRB power consumption maximal value is 1.4187E+07kNmm, occur in the 8.92s of ChiChi ripple, known at this moment between segment structure reaction the most violent, maximum interlaminar shear is 15948.7kN, maximum relative storey displacement is 329.67mm; BRB in 0～2.5s stage in elastic stage; Additional effective damping ratio is 124.76% with changing course calculated maximum, occurs in 15.64s, but the equal value 25% that is greater than 25% according to standard, and to try to achieve the additional each moment point average of effective damping ratio be 3.3202%.
As shown in Figure 8,9, seismic event is natural ripple two: structural strain energy maximal value is 1.9461E+07kNmm, occur in the 10.92s of ChiChi ripple, BRB power consumption maximal value is 1.3261E+07, occur in the 11s of Landers ripple, known at this moment between segment structure reaction the most violent, maximum interlaminar shear is 127357kN, maximum relative storey displacement is 396.44mm; BRB in 0～8s stage in elastic stage; Additional effective damping ratio is 4798.56% with changing course calculated maximum, occurs in 11.92s, but is greater than 25% equal value 25% according to standard, and trying to achieve its average is 4.3127%.
As shown in Figure 10,11, seismic event is artificial ripple: structural strain energy maximal value is 1.7090E+07kNmm, occur in the 8.32s of artificial ripple, BRB power consumption maximal value is 2.4552E+07, also occur in the 8.32s of artificial ripple, known at this moment between segment structure reaction the most violent, maximum interlaminar shear is 173989kN, maximum relative storey displacement is 353.98mm; BRB in 0～6s stage substantially in elastic stage; Additional effective damping ratio is 448.10% with changing course calculated maximum, occurs in 19.24s, but is greater than 25% equal value 25% according to standard, and trying to achieve its average is 4.8909%.
Adopt envelope value to calculate additional effective damping ratio as shown in table 2:
(table 2)
Obtain the additional effective damping ratio of BRB structure under each ground seismic wave function by computing method of the present invention and existing envelope method, respectively additional gained effective damping ratio superposition is returned to agent structure, and by the cancellation that arranges of former energy-dissipating and shock-absorbing structure BRB plasticity hinge, only allow it that additional equivalent stiffness is provided, superposition after additional effective damping ratio structural damping ratio in table 3:
(table 3)
The relative BRB results of structural analysis of results of structural analysis deviation average after each superposition damping ratio, referring to table 4:
(table 4)
Figure 12～17 are the elasto-plastic time history analysis contrast of structure rarely occurred earthquake under each seismic event, analyze known by above structural response figure and structural deviation mean value compare, than envelope method, it is comparatively identical to structure post analysis result and BRB results of structural analysis that the present invention calculates the additional effective damping ratio superposition of gained, and relative deviation average is less.With envelope principle of design and counting yield and Yan Junke suitably adopts the method to calculate the additional effective damping ratio of BRB in BRB energy-dissipating and shock-absorbing structure.Computing method of the present invention, except applying to BRB energy-dissipating and shock-absorbing structure, also can adopt in conjunction with actual and " anti-rule " requirement conduct the reference of other displacements and velocity profile energy dissipation component energy-dissipating and shock-absorbing structure.
Embodiments of the present invention are not limited to this; according to foregoing of the present invention; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the present invention prerequisite; the present invention can also make modification, replacement or the change of other various ways, within all dropping on rights protection scope of the present invention.
Claims (5)
1. obtaining value method-overall approach of the additional effective damping ratio of energy-dissipating and shock-absorbing structure sinker, specifically comprises the following steps:
(1) energy dissipating shock-damping structure is carried out to finite element elasto-plastic time history analysis, first on finite element simulation calculation platform, set up the finite element model of agent structure, on the finite element model of agent structure, weight application load, reloads seismic event;
(2) according to the relative storey displacement of each floor of agent structure and interlayer rigidity, tentatively determine quantity and the position of sinker, sinker is arranged in the finite element model of agent structure, form the finite element model of energy-dissipating and shock-absorbing structure;
(3) weight application load on the finite element model of energy-dissipating and shock-absorbing structure, reloads seismic event;
(4) calculate the total strain energy of energy-dissipating and shock-absorbing structure under expection displacement, each floor of supposing agent structure is rigidity floor, extracts the floor interlaminar shear value F corresponding to the each moment point of seismic event
itwith floor relative storey displacement value u
it;
(5) by by (4) each floor interlaminar shear value F of the synchronization point of gained of step
itwith each floor relative storey displacement value u
itmultiply each other, after the summation of the product value of all moment point to gained, get its 1/2, obtain the total strain energy Wst of energy-dissipating and shock-absorbing structure in the each moment point of seismic event, and get the maximal value max[Wst of total strain energy Wst];
(6) analysis obtains each sinker and enters the hysteresis loop of surrendering the power consumption stage, calculates the maximum hysteresis circle of each hysteresis loop area A
j, as the dissipation energy of each sinker, then dissipation energy summation to each sinker, obtain the summation Σ W of the dissipation energy of whole sinkers
cj;
(7) according to following formula:
ξ
a＝ΣW
cj/(4π·max[W
st])
Calculate the additional effective damping ratio § of energy-dissipating and shock-absorbing structure sinker
a;
(8) evaluate the additional effective damping ratio § of the sinker (7) being obtained by step
awhether be more than or equal to the additional effective damping ratio of energy-dissipating and shock-absorbing structural behaviour goal-setting;
The additional effective damping ratio § of the sinker obtaining a) in this way,
aas the additional effective damping ratio of definite sinker;
B) if not, enter step (9);
(9) adjust quantity and the position of sinker, then repeating step (4)～(8), until make the additional effective damping ratio § of sinker
atill being more than or equal to the additional effective damping ratio of energy-dissipating and shock-absorbing structural behaviour goal-setting, finally determine the additional effective damping ratio of sinker.
2. obtaining value method-the overall approach of the additional effective damping ratio of energy-dissipating and shock-absorbing structure sinker according to claim 1, it is characterized in that: step (6) in, the dissipation energy of each sinker obtains by the hysteretic behavior analysis of each sinker of setting up on finite element simulation calculation platform.
3. obtaining value method-the overall approach of the additional effective damping ratio of energy-dissipating and shock-absorbing structure sinker according to claim 2, is characterized in that: step (7) in, if the additional effective damping ratio § of sinker
aexceed 25%, with 25% value.
4. obtaining value method-the overall approach of the additional effective damping ratio of energy-dissipating and shock-absorbing structure sinker according to claim 3, it is characterized in that: described seismic event is at least three, described seismic event is natural ripple or artificial ripple, the quantity of described natural ripple is taken up an area 2/3 of seismic wave sum, and the quantity of described artificial ripple is taken up an area 1/3 of seismic wave sum.
5. according to the obtaining value method-overall approach of the additional effective damping ratio of the energy-dissipating and shock-absorbing structure sinker described in claim 1～4 any one, it is characterized in that: in the time loading seismic event, the amplitude of seismic event principal direction, inferior direction and Z-direction loads according to 1:0.85:0.65 three-dimensional.
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| CN104405054A (en) * | 2014-10-09 | 2015-03-11 | 甘肃省建筑设计研究院 | Method for designing structure with stiction energy dissipater |
| CN105604204A (en) * | 2016-01-18 | 2016-05-25 | 广东省建筑设计研究院 | Energy dissipation structure energy dissipater envelop optimization method based on target additional effective damping ratio |
| CN105696717A (en) * | 2016-01-18 | 2016-06-22 | 广东省建筑设计研究院 | Comprehensive optimizing method for energy dissipaters in energy dissipating damping structure based on target addition effective damping ratios |
| CN105714951A (en) * | 2016-01-18 | 2016-06-29 | 广东省建筑设计研究院 | Time-varying optimizing method for energy dissipation devices of energy dissipation damping structure based on target additional effective damping ratio |
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| CN108846192A (en) * | 2018-06-08 | 2018-11-20 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of ship three dimensional sound flexibility analysis method of any impedance bundary of structure |
| CN108897966A (en) * | 2018-07-11 | 2018-11-27 | 中国民航大学 | Equivalent Elasticity analysis method based on the modified buckling restrained brace structure of elastoplasticity |
| CN113010947A (en) * | 2021-03-02 | 2021-06-22 | 大连理工大学 | Multi-disaster-resistant vibration reduction design method suitable for antenna structure of super high-rise building |
| CN115718967A (en) * | 2022-12-23 | 2023-02-28 | 甘肃省建筑设计研究院有限公司 | Design method for energy dissipation and shock absorption structure of connecting beam damper arranged in high seismic intensity area house |
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| CN104405054A (en) * | 2014-10-09 | 2015-03-11 | 甘肃省建筑设计研究院 | Method for designing structure with stiction energy dissipater |
| CN105604204B (en) * | 2016-01-18 | 2018-08-24 | 广东省建筑设计研究院 | The seismic energy dissipation structure sinker envelop optimization method of effective damping ratio is added based on target |
| CN105604204A (en) * | 2016-01-18 | 2016-05-25 | 广东省建筑设计研究院 | Energy dissipation structure energy dissipater envelop optimization method based on target additional effective damping ratio |
| CN105696717A (en) * | 2016-01-18 | 2016-06-22 | 广东省建筑设计研究院 | Comprehensive optimizing method for energy dissipaters in energy dissipating damping structure based on target addition effective damping ratios |
| CN105714951A (en) * | 2016-01-18 | 2016-06-29 | 广东省建筑设计研究院 | Time-varying optimizing method for energy dissipation devices of energy dissipation damping structure based on target additional effective damping ratio |
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| CN108846192A (en) * | 2018-06-08 | 2018-11-20 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of ship three dimensional sound flexibility analysis method of any impedance bundary of structure |
| CN108897966A (en) * | 2018-07-11 | 2018-11-27 | 中国民航大学 | Equivalent Elasticity analysis method based on the modified buckling restrained brace structure of elastoplasticity |
| CN108897966B (en) * | 2018-07-11 | 2022-03-11 | 中国民航大学 | Equivalent elasticity analysis method of buckling restrained brace structure based on elastic-plastic correction |
| CN113010947A (en) * | 2021-03-02 | 2021-06-22 | 大连理工大学 | Multi-disaster-resistant vibration reduction design method suitable for antenna structure of super high-rise building |
| CN113010947B (en) * | 2021-03-02 | 2022-10-14 | 大连理工大学 | Multi-disaster-resistant vibration reduction design method suitable for antenna structure of super high-rise building |
| CN115718967A (en) * | 2022-12-23 | 2023-02-28 | 甘肃省建筑设计研究院有限公司 | Design method for energy dissipation and shock absorption structure of connecting beam damper arranged in high seismic intensity area house |
| CN115718967B (en) * | 2022-12-23 | 2023-09-29 | 甘肃省建筑设计研究院有限公司 | Design method for energy dissipation and shock absorption structure of continuous beam damper arranged in high seismic intensity area residence |
| CN117251952A (en) * | 2023-09-08 | 2023-12-19 | 海南大学 | Optimal design method of damping structure based on multi-level graded yield damper |
| CN117648835A (en) * | 2024-01-30 | 2024-03-05 | 安徽省交通控股集团有限公司 | BRB design parameter optimization method suitable for highway pile plate type structure |
| CN117648835B (en) * | 2024-01-30 | 2024-04-16 | 安徽省交通控股集团有限公司 | BRB design parameter optimization method suitable for highway pile plate type structure |
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