Multi-objective performance-based aseismic design method of engineering structure

Abstract

The invention relates to a performance-based aseismic design method. The multi-objective performance-based aseismic design method of an engineering structure includes the following steps: (1) providing performance objectives achieved by the engineering structure; (2) inputting different performance objectives into a single degree-of-freedom elastic-plastic structural system to perform simulation tests; (3) adjusting magnitude of aseismic wave continuously, determining functional relationship between the aseismic influence coefficient and the structural period when the different performance objectives are achieved, and obtaining an aseismic demand spectrum curve; (4) obtaining the relationship between shearing force and displacement of the engineering structure by using an analytical method; (5) converting the relationship between the shearing force and the displacement of the engineering structure into a functional relationship between the capacity and the displacement under the single degree-of-freedom system, and obtaining a structural capacity spectrum curve; (6) according to the structural period, comparing the relationship between the capacity spectrum curve and the aseismic demand spectrum curve, and estimating structure aseismic capability under different performance objectives. The engineering structure multi-objective performance-based aseismic design method is used for estimating aseismic performance of the engineering structure and designing aseismic construction according to the estimating results of the engineering structure.

Description

technical field [0001] The invention relates to an engineering structure anti-seismic design method in the field of civil engineering, in particular to a performance-based anti-seismic design method. Background technique [0002] Seismic design is the main means to ensure structural safety in the event of an earthquake, and the seismic design of projects in various countries is based on the seismic design codes of each country. [0003] Articles 5.2.1 and 5.2.2 of my country's "Code for Seismic Design of Buildings" (GB50011-2010) stipulate the calculation of earthquake action under frequent earthquakes, and Articles 5.5.2 and 5.5.3 respectively stipulate that under rare earthquakes The scope and method of plastic deformation check calculation, but these methods are based on the seismic action and deformation check calculation based on the set seismic intensity. [0004] US FEMA273 uses the multi-coefficient method to estimate structural displacement, but its basis is complet...

AI Technical Summary

Problems solved by technology

However, the seismic design method of engineering structures is based on the conditions of setting the intensity or ground motion parameters, and there is still a lack of seismic design methods based on performance objectives.

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