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Value obtaining method-comprehensive method of additional effective damping ratios of energy dissipaters with energy dissipation and shock absorption structures

An energy dissipater and damping ratio technology, which is applied in the fields of instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of poor accuracy and conservative calculation results, and achieve the effect of reducing project cost.

Active Publication Date: 2014-06-04
ARCHITECTURAL DESIGN RES INST OF GUANGDONG PROVINCE
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Problems solved by technology

[0016] However, the additional effective damping of the energy absorber in the energy-dissipating structure is time-varying damping, and the additional damping of each energy-dissipating structure is a time-varying parameter. The response changes with the acceleration of the seismic wave, which makes the energy dissipation of the energy dissipation device time-varying
When the envelope method is used to calculate the structural strain energy, the maximum value of the floor shear force and floor displacement is taken as the seismic response, so the calculated strain energy is the envelope value, and the energy dissipation of the energy dissipation device is taken as the area of ​​the outermost circle of the hysteresis curve The value taken is the actual envelope value of the energy dissipation of the energy dissipator. Therefore, although the calculation process of the envelope method is simple and convenient, the calculation result is relatively conservative and the accuracy is poor.

Method used

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  • Value obtaining method-comprehensive method of additional effective damping ratios of energy dissipaters with energy dissipation and shock absorption structures
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  • Value obtaining method-comprehensive method of additional effective damping ratios of energy dissipaters with energy dissipation and shock absorption structures

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Embodiment Construction

[0063] Such as Figure 1~3 As shown, in this embodiment, the steel structure project is a structure with a giant conversion truss-steel frame-supporting tube, the building height is about 100m, the plane is back-shaped, the size is 100m×100m, and the height-to-width ratio of the structure is 100 / 69.6= 1.44, the main building adopts four support tubes 1 with L-shaped horizontal section to form a vertical support system, and the support tubes 1 are arranged near the corners of the building plane. The size of the L-shaped support cylinder 1 is 18m×18m, and the structural span between the support cylinders 1 is 33.6m. The corresponding BRB (a type of displacement-related energy dissipator) is arranged on the outside of the L-shaped support cylinder 1 of this structure to form BRB energy dissipation. The seismic structure, specifically the BRB, is arranged between the column 11 and the beam 12 of the L-shaped support cylinder. The seismic fortification intensity of the project is ...

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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 [0001] The invention relates to the design and analysis technology of energy dissipation and shock absorbing structures in the technical field of building structures, in particular to a method for obtaining the additional effective damping ratio of an energy absorber of an energy absorbing and shock absorbing structure—a comprehensive method. Background technique [0002] The earthquake resistance of traditional building structures mainly consumes seismic energy through the damage of structures and components during earthquakes, and the serious damage of structures and components is the process of conversion or consumption of seismic energy. In recent years, with the frequent occurrence of earthquakes in our country, the building structure has been severely damaged, endangering people's lives and property safety. Since the mechanism of the "hard" earthquake resistance of the structure is difficult to meet the effective control requirements, the "soft" earthqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 区彤徐昕谭坚陈星张连飞焦柯林家豪郭伟佳
Owner ARCHITECTURAL DESIGN RES INST OF GUANGDONG PROVINCE
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