Envelope Optimization Method for Energy Dissipator of Seismic Structure Based on Target Additional Effective Damping Ratio

Abstract

The invention discloses an energy dissipation structure energy dissipater envelop optimization method based on a target additional effective damping ratio. The method includes the steps that earthquake waves for elastic-plastic time-history analysis of a main structure are selected; energy dissipation structure performance targets and requirements in rare earthquake action on the main structure are set; the target actual additional effective damping ratio xiaim of the main structure is calculated; the types, arrangement positions, forms and number of energy dissipaters are preliminarily determined, rare earthquake elastic-plastic time-history analysis is carried out on an energy dissipation structure under the action of all the earthquake waves, the actual additional effective damping ratio xia of the energy dissipaters is calculated, xiaim and xia are compared, and the process is conducted till the formula 0.55 xiaim<=xia<=1.1*0.55 xiaim is obtained through calculation according to natural waves, and the formula 0.8 xiaim<=xia<=1.1*0.8 xiaim is obtained through calculation according to artificial waves. By means of the method, the selection and arrangement of the energy dissipaters are reasonable in energy dissipation structure design, the energy dissipaters are in an efficient working state, and the technical index and the economical index of energy dissipater design in energy dissipation structure design are reached.

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 an energy dissipation envelope optimization method for shock absorbing structures based on a 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 "soft" earthquake resistance method - e...

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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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