CN106284724A - A kind of method strengthening building structure shock-damping energy-dissipating - Google Patents
A kind of method strengthening building structure shock-damping energy-dissipating Download PDFInfo
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- CN106284724A CN106284724A CN201510268846.8A CN201510268846A CN106284724A CN 106284724 A CN106284724 A CN 106284724A CN 201510268846 A CN201510268846 A CN 201510268846A CN 106284724 A CN106284724 A CN 106284724A
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Abstract
nullThe invention discloses a kind of method strengthening building structure shock-damping energy-dissipating，Comprise the steps: initial option sinker，The equivalent stiffness of sinker is calculated according to sinker equivalent stiffness computational methods，Then according to the equivalent stiffness of sinker，Layouts etc. are for the sinker shock-damping structure of diagonal brace，Mode-shape decomposition response spectrum is used to carry out structural analysis by new equivalent damping ratio，Damping force and the relative deformation of each floor can be obtained，Calculate total damping ratio，Iterate，Until equivalent structural damping ratio is essentially identical with the equivalent damping ratio of the structure obtained，Check whether seismic energy dissipation structure meets design requirement，A kind of requirements for fortification against earthquake is provided for building seismic energy dissipation structure，Better economy，Energy-consuming shock absorber forms a new structural system with original structure，The dynamic trait of this new construction system has large change with energy dissipating ability compared with original structure，Due in seismic energy dissipation structure，The definite functions of different structure component，It is more beneficial for improving the anti-seismic performance of structure.
Description
Technical field
The invention belongs to building structure field, particularly to a kind of method strengthening building structure shock-damping energy-dissipating.
Background technology
In the rate sequence of regional quake-proof system, the shock resistance of building and infrastructure is the first line of defence of Seismic Resistance And Disaster Reduction.Collapsing and destroying of building construction is the main root causing earthquake disaster, as an expert of Univ Colorado-Boulder USA once said, " cause injures and deaths is building, rather than earthquake ".Therefore, improve the shock resistance of building, particularly improve the antiseismic collapse capacity of building, be the most important components strengthening earthquake territory Seismic Resistance And Disaster Reduction ability.The Wenchuan earthquake of China on May 12 Sichuan generation in 2008 belongs to especially big rarely occurred earthquake, a large amount of house collapses, causes the property destruction of the irremediable person.
Architectural structure system horizontal layout, being vertically arranged that irregular conditions is more, structure is big by geological process Unpredictability, providing fortification against earthquakes can not meet structural seismic and set up defences requirement, and economy is poor.
Summary of the invention
For the deficiencies in the prior art, a kind of method strengthening building structure shock-damping energy-dissipating of the present invention, the method meets building structure aseismatic and sets up defences requirement, better economy.This seismic energy dissipation structure method, with the definite functions of structural elements, is more beneficial for improving the anti-seismic performance of structure.
The technical scheme realizing the object of the invention is:
A kind of method strengthening building structure shock-damping energy-dissipating, it is characterised in that comprise the steps:
1) initial option sinker.
2) calculate the equivalent stiffness of sinker according to sinker equivalent stiffness computational methods, then according to the equivalent stiffness calculating of sinker etc. for the size of component, and be arranged in computation model sinker position accordingly by waiting for diagonal brace.
3) use mode-shape decomposition response spectrum to carry out structural analysis by the sinker shock-damping structure for diagonal brace such as arranging by new equivalent damping ratio, the design softwares such as PKPM and ETABS can be used.
4) horizontal shear of each floor, horizontal displacement, the damping force of each sinker and relative deformation can be obtained through structural analysis.
5) total total damping ratio is calculated；
6) by step 2)～step 5) iterate, until the equivalent damping ratio of equivalent structural damping ratio structure calculated with step 5) that step 3) calculates is essentially identical.
7) structure effect obtained after calculating convergence is the structure effect considering sinker to agent structure damping effect, checks whether seismic energy dissipation structure meets design requirement.If it is satisfied, then design terminates；If be unsatisfactory for, need to rearrange sinker.
8) calculate the additional damping ratio of sinker, strengthen the ability of building structure shock-damping energy-dissipating.
Step 5) recalculate the equivalent stiffness of sinker according to the state that structure and sinker are new and be added to the equivalent damping ratio of structure, and being calculated as follows the total damping of structure than ζ,
ζ=ζ 1+ ζ d (1)
Wherein ζ is Zero Energy Thermonuclear Assembly (Zeta) coefficient, and ζ 1 is agent structure damping ratio；ζ d is the equivalent damping ratio that energy dissipation component is added to structure.
Step 8), on the basis of the result of iteration convergence, suitably increases quantity and the tonnage of sinker, to guarantee that seismic energy dissipation structure can reach set up defences target and have enough safety stocks.
The additional damping ratio calculating sinker is relevant to displacement amplitude, and the additional damping ratio of seismic energy dissipation structure is different under little shake, middle shake, big shake, should calculate respectively, and sinker deformability should meet the deformability of rarely occurred earthquake.If added to structure
Damping ratio, more than 25%, " is built
Build earthquake resistant design code " (GB50011-2010) require by 25% calculating.
Use dynamic constitutive model and the parameter thereof of sinker, structure can be carried out time-history analysis.According to the regulation of " seismic design provision in building code " (GB50011-2010), three seismic waves of general employing are analyzed, the natural ripple of two of which, an artificial ripple.According to code requirement, should select to meet the seismic wave of engineering ground characteristic, using selected seismic wave to be no less than the 65% of response spectrum method calculated base shearing by the base shearing that time-history analysis obtains, the base shearing meansigma methods that three seismic wave time-history analysis obtain should be not less than the 80% of response spectrum method calculated base shearing.According to time-history analysis result, sinker can be calculated to information such as the additional damping ratio of structure, sinker deformation, relative storey displacement and base shearings, the information calculated by above step, the effect of the sinker of raising that can be bigger, strengthen the ability of building structure shock-damping energy-dissipating.
Beneficial effect
A kind of method strengthening building structure shock-damping energy-dissipating, can be that building seismic energy dissipation structure provides a kind of requirements for fortification against earthquake, the method of better economy, use the design philosophy of shockproof control, by energy-consuming shock absorber is formed a new structural system with original structure, original structure and additional energy-consuming shock absorber are the minor structure of this new construction system, the dynamic trait of this new construction system has large change with energy dissipating ability compared with original structure, due in seismic energy dissipation structure, the definite functions of different structure component, is more beneficial for improving the anti-seismic performance of structure.
Detailed description of the invention
The present invention is further elaborated below, but is not limitation of the invention.
Embodiment
A kind of method strengthening building structure shock-damping energy-dissipating, it is characterised in that comprise the steps:
1) initial option sinker.
2) calculate the equivalent stiffness of sinker according to sinker equivalent stiffness computational methods, then according to the equivalent stiffness calculating of sinker etc. for the size of component, and be arranged in computation model sinker position accordingly by waiting for diagonal brace.
3) use mode-shape decomposition response spectrum to carry out structural analysis by the sinker shock-damping structure for diagonal brace such as arranging by new equivalent damping ratio, the design softwares such as PKPM and ETABS can be used.
4) horizontal shear of each floor, horizontal displacement, the damping force of each sinker and relative deformation can be obtained through structural analysis.
5) total total damping ratio is calculated；
6) by step 2)～step 5) iterate, until the equivalent damping ratio of equivalent structural damping ratio structure calculated with step 5) that step 3) calculates is essentially identical.
7) structure effect obtained after calculating convergence is the structure effect considering sinker to agent structure damping effect, checks whether seismic energy dissipation structure meets design requirement.If it is satisfied, then design terminates；If be unsatisfactory for, need to rearrange sinker.
8) calculate the additional damping ratio of sinker, strengthen the ability of building structure shock-damping energy-dissipating.
Step 5) recalculate the equivalent stiffness of sinker according to the state that structure and sinker are new and be added to the equivalent damping ratio of structure, and being calculated as follows the total damping of structure than ζ,
ζ=ζ 1+ ζ d (1)
Wherein ζ is Zero Energy Thermonuclear Assembly (Zeta) coefficient, and ζ 1 is agent structure damping ratio；ζ d is the equivalent damping ratio that energy dissipation component is added to structure.
Step 8), on the basis of the result of iteration convergence, suitably increases quantity and the tonnage of sinker, to guarantee that seismic energy dissipation structure can reach set up defences target and have enough safety stocks.
The additional damping ratio calculating sinker is relevant to displacement amplitude, and the additional damping ratio of seismic energy dissipation structure is different under little shake, middle shake, big shake, should calculate respectively, and sinker deformability should meet the deformability of rarely occurred earthquake.If added to structure
Damping ratio, more than 25%, " is built
Build earthquake resistant design code " (GB50011-2010) require by 25% calculating.
Use dynamic constitutive model and the parameter thereof of sinker, structure can be carried out time-history analysis.According to the regulation of " seismic design provision in building code " (GB50011-2010), three seismic waves of general employing are analyzed, the natural ripple of two of which, an artificial ripple.According to code requirement, should select to meet the seismic wave of engineering ground characteristic, using selected seismic wave to be no less than the 65% of response spectrum method calculated base shearing by the base shearing that time-history analysis obtains, the base shearing meansigma methods that three seismic wave time-history analysis obtain should be not less than the 80% of response spectrum method calculated base shearing.According to time-history analysis result, sinker can be calculated to information such as the additional damping ratio of structure, sinker deformation, relative storey displacement and base shearings, the information calculated by above step, the effect of the sinker of raising that can be bigger, strengthen the ability of building structure shock-damping energy-dissipating.
Claims (3)
1. the method strengthening building structure shock-damping energy-dissipating, it is characterised in that comprise the steps:
1) initial option sinker；
2) calculate the equivalent stiffness of sinker according to sinker equivalent stiffness computational methods, then according to the equivalent stiffness calculating of sinker etc. for the size of component, and be arranged in computation model sinker position accordingly by waiting for diagonal brace；
3) use mode-shape decomposition response spectrum to carry out structural analysis by the sinker shock-damping structure for diagonal brace such as arranging by new equivalent damping ratio, the design softwares such as PKPM and ETABS can be used；
4) horizontal shear of each floor, horizontal displacement, the damping force of each sinker and relative deformation can be obtained through structural analysis；
5) total total damping ratio is calculated；
6) by step 2)～step 5) iterate, until the equivalent damping ratio of equivalent structural damping ratio structure calculated with step 5) that step 3) calculates is essentially identical；
7) structure effect obtained after calculating convergence is the structure effect considering sinker to agent structure damping effect, checks whether seismic energy dissipation structure meets design requirement；
If it is satisfied, then design terminates；If be unsatisfactory for, need to rearrange sinker；
8) calculate the additional damping ratio of sinker, strengthen the ability of building structure shock-damping energy-dissipating.
The method of enhancing building structure shock-damping energy-dissipating the most according to claim 1, it is characterized in that, step 5) recalculates the equivalent stiffness of sinker according to the state that structure and sinker are new and is added to the equivalent damping ratio of structure, and the total damping being calculated as follows structure compares ζ
ζ=ζ 1+ ζ d (1)
Wherein ζ is Zero Energy Thermonuclear Assembly (Zeta) coefficient, and ζ 1 is agent structure damping ratio；ζ d is the equivalent damping ratio that energy dissipation component is added to structure.
The method of enhancing building structure shock-damping energy-dissipating the most according to claim 1, it is characterized in that, step 8), on the basis of the result of iteration convergence, suitably increases quantity and the tonnage of sinker, to guarantee that seismic energy dissipation structure can reach set up defences target and have enough safety stocks；
The additional damping ratio calculating sinker is relevant to displacement amplitude, and the additional damping ratio of seismic energy dissipation structure is different under little shake, middle shake, big shake, should calculate respectively, and sinker deformability should meet the deformability of rarely occurred earthquake；If added to structure
Damping ratio is more than 25%, and " seismic design provision in building code " (GB50011-2010) requires by 25% calculating；
Use dynamic constitutive model and the parameter thereof of sinker, structure can be carried out time-history analysis；According to the regulation of " seismic design provision in building code " (GB50011-2010), three seismic waves of general employing are analyzed, the natural ripple of two of which, an artificial ripple；
According to code requirement, should select to meet the seismic wave of engineering ground characteristic, using selected seismic wave to be no less than the 65% of response spectrum method calculated base shearing by the base shearing that time-history analysis obtains, the base shearing meansigma methods that three seismic wave time-history analysis obtain should be not less than the 80% of response spectrum method calculated base shearing；According to time-history analysis result, sinker can be calculated to information such as the additional damping ratio of structure, sinker deformation, relative storey displacement and base shearings, the information calculated by above step, the effect of the sinker of raising that can be bigger, strengthen the ability of building structure shock-damping energy-dissipating.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706111A (en) * | 2020-07-20 | 2020-09-25 | 东南大学建筑设计研究院有限公司 | Near-modern building seismic reinforcement design method based on structural performance |
| 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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2015
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706111A (en) * | 2020-07-20 | 2020-09-25 | 东南大学建筑设计研究院有限公司 | Near-modern building seismic reinforcement design method based on structural performance |
| 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 |
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Application publication date: 20170104 |