Comprehensive optimizing method for energy dissipaters in energy dissipating damping structure based on target addition effective damping ratios

Abstract

The invention discloses a comprehensive optimizing method for energy dissipaters in an energy dissipating damping structure based on target addition effective damping ratios. The comprehensive optimizing method comprises the following steps: selecting earthquake waves used for the elastic-plastic time-history analysis of a main body structure; setting the performance target and requirements of an energy dissipating damping structure when the main body structure rarely meets earthquake action; calculating the target actual addition effective damping ratio xiaim of the main body structure; primarily determining the type, distribution position, form and number of energy dissipaters; under the action of each earthquake wave, carrying out elastic-plastic time-history analysis on the energy dissipating damping structure as if rare earthquake is met; calculating the actual addition effective damping ratio xia of the energy dissipaters; and comparing xia with xiaim until, according to natural wave calculation, obtaining the following result: xia is larger than or equal to 0.65 xiaim and smaller than or equal to 1.1*0.65 xiaim; and according to artificial wave calculation, obtaining the following result: xia is larger than or equal to 0.8 xiaim and smaller than or equal to 1.1*0.8 xiaim. The reasonable adoption and arrangement of the energy dissipaters in the design of the energy dissipating damping structure are realized, the energy dissipaters are in a highly efficient work state, and the design technical and economical indexes of the energy dissipaters in the design of the energy dissipating damping structure are realized.

Description

technical field [0001] The invention relates to the design and analysis technology of energy dissipation and shock absorption structures in the technical field of building structures, in particular to a comprehensive optimization method for energy dissipation and shock absorption structure energy dissipation devices based on the target additional effective damping ratio. 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 "...

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Problems solved by technology

[0008] (1) It starts from the displacement macro parameter index of the main structure of the building, and its essential purpose is to control the deformation of the energy dissipation and shock absorption structure. The optimization of the energy dissipation device is only to adjust the arrangement position of the energy dissipation device, and rarely involves or even does not affect the energy dissipation device. Optimizing the quantity and layout form of the energy dissipation device causes the energy dissipation device to be in a low-efficiency working state in the energy dissipation and shock absorption structure. Although it can basically meet the technical indicators of the energy dissipation device design in the energy dissipation and shock absorption structure design, it cannot meet the economic requirements. sexual indicators

[0009] (2) Its essential purpose is to control the deformation of energy-dissipating and shock-absorbing structures. Therefore, this optimization method is limited to multi-storey and high-rise buildings with the concept of floors, and is not suitable for large public buildings without an absolute concept of floors, such as large stadiums. venues, airports, stations, etc., so it cannot be applied to all architectural forms

[0010] (3) It does not start from the energy dissipation characteristics of the energy dissipator itself, and ignores that the change of the structural response of the energy dissipating shock-absorbing structure under earthquake action is the reason why the energy dissipator dissipates the seismic energy and provides an additional effective damping ratio, but only The optimization of the energy dissipation device is based on the structural displacement parameters. In this way, the target technical and economic indicators of the seismic performance of the energy dissipation and shock absorption structure are not fully realized, and the essential characteristics of the optimization of the energy dissipation device are not reflected, resulting in the optimization of the energy dissipation device. Low efficiency, and the optimization effect is not obvious

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