Time-changing method-evaluation method of effective damping ratio attached on energy dissipation damping structure energy dissipater

Abstract

The invention discloses a time-changing method-an evaluation method of the effective damping ratio attached on an energy dissipation damping structure energy dissipater. Between-floor shearing force values and between-floor displacement values corresponding to moments of earthquake waves are extracted; total stress energy of moments of earthquake waves of an energy dissipation damping structure is obtained; dissipated energy at each moment of earthquake waves of each energy dissipater is computed, summation is carried out, and the sum of dissipated energy of moments of earthquake waves of all energy dissipaters is obtained; the attached effective damping ratio of each energy dissipater at each moment of earthquake waves is obtained; the mean value of the attached effective damping ratios of moments of the energy dissipaters is obtained, and an attached effective damping ratio is obtained; and whether the attached effective damping ratio is larger than or equal to the set attached effective damping ratio of an energy dissipation damping structure performance target is evaluated. In the process to obtain accurate computing results, the number and the position of the energy dissipaters are optimized ceaselessly, so that energy dissipater selecting and arranging are proper, the requirement for large-scale earthquake energy dissipation can be met, meanwhile, the purpose of economy is achieved, and construction cost is lowered.

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 dissipation and shock absorbing structure - a time-varying 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" eart...

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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.

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