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Forecast method for aseismic intensity of engineering structure

A technology of engineering structure and seismic intensity, applied in the direction of earthquake resistance, building components, building types, etc., can solve the problems of lack of seismic design methods

Active Publication Date: 2014-09-17
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Forecast method for aseismic intensity of engineering structure
  • Forecast method for aseismic intensity of engineering structure
  • Forecast method for aseismic intensity of engineering structure

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Embodiment Construction

[0019] Method of the present invention comprises the steps:

[0020] (1) Obtain the capacity curve of the engineering structure by using the analytical method;

[0021] (2) Standardize the capacity curve of the engineering structure according to the elastic-plastic double-line model;

[0022] (3) Transform the overall capacity curve of the structure into a function of the obtained displacement and equivalent capacity under the single-degree-of-freedom system;

[0023] (4) Predict the corresponding seismic intensity according to the set performance displacement target and intensity curve.

[0024] 1. Use static pushover analysis method (PUSHOVER) or incremental dynamic analysis method (IDA) to obtain the capacity curve of the engineering structure.

[0025] Static pushover analysis (PUSHOVER) is used to apply a certain distributed horizontal load to the structure, and the horizontal load increases monotonously; or incremental dynamic analysis (IDA) is used to increase the inp...

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Abstract

The invention relates to an aseismic design method of an engineering structure in the field of civil engineering, in particular to a performance-based aseismic design method. A forecast method for the aseismic intensity of the engineering structure comprises the following steps: (1) a capability curve of the engineering structure is obtained by adopting an analytical method; (2) the capability curve of the engineering structure is standardized according to an elastoplastic double broken line model; (3) the overall capability curve of the engineering structure is converted into a function that can obtain displacement and equivalence capabilities in a single-degree-of-freedom system; and (4) the corresponding aseismic intensity can be forecasted according to a set performance displacement objective and an intensity curve. The forecast method for the aseismic intensity of the engineering structure is based on the performance objective to evaluate an intensity level of the engineering structure, and aseismic measures are designed according to an evaluation result 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/98E04H9/02
Inventor 刘文锋
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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