Modeling method for Chinese code-based strength reduction factor model
A strength reduction factor and modeling method technology, applied in the direction of electrical digital data processing, special data processing applications, measurement devices, etc., can solve the problems of not reflecting the characteristics of China's ground motion, not reflecting characteristics, etc.
Inactive Publication Date: 2012-07-04
HARBIN INST OF TECH
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[0004] The purpose of this invention is to provide a kind of modeling method based on the strength reduction factor model of Chinese norms, to solve the existing strength reduction factor model does not reflect the characteristics of China's design response spectrum (such as China's site classification standards and design Earthquake grouping concepts, etc.), and did not reflect the characteristics of China's ground motion
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[0027] The specific process of the modeling method of the strength reduction factor model based on the Chinese standard described in this embodiment is as follows:
[0028] Step 1. Select earthquake records and classify them according to the site classification method and design earthquake grouping in China;
[0029] Step 2. Select the target ductility coefficient μ i ;
[0030] Step 3, select the period of the single-degree-of-freedom structure;
[0031] Step 4. Determine the dynamic characteristics of the structure: K 0 , c, ω n , where K 0 is the stiffness of the structure, c is the damping coefficient, ω n is the natural frequency;
[0032] Step five, select the resilience model of the structure;
[0033] Step 6. Calculate the minimum strength F required for the structure to maintain elasticity under a given earthquake action y (μ=1); μ is the structural ductility coefficient;
[0034] Step 7. Let the yield strength of the structure be F y =F y (μ=1)-nΔF; where ...
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The invention discloses a modeling method for a Chinese code-based strength reduction factor model, is applicable to the modeling method for the strength reduction factor model in an aseismic design, and solves the problems that the conventional strength reduction factor model does not reflect the characteristics of a reaction spectrum designed in China or the characteristics of Chinese ground motion. The method comprises the following technical key points: selecting a target ductility factor mu i; selecting a period with single-degree-of-freedom structure; determining dynamic behavior of thestructure; calculating the minimum strength Fy (mu is equal to 1) required by retaining elasticity by the structure under the given seismic action; determining the yield displacement xy which is equal to Fy / K0 of the structure; judging whether the displacement ductility factor mu of the structure is equal to the target ductility factor mu i; calculating the strength reduction factor R mu which isequal to Fy (mu is equal to1) / Fy (mu is equal to mu i) corresponding to the period of the given single-degree-of-freedom structure; and performing regression analysis to obtain the Chinese code-basedstrength reduction factor model. In the method, the ground motion characteristic of China is considered, the characteristics of a Chinese earthquake resistant code are combined, the concept of classification of design earthquake is considered and the error caused by using a foreign strength reduction factor model in the past is changed.
Description
technical field [0001] The invention relates to a modeling method suitable for a strength reduction coefficient model in aseismic design. Background technique [0002] The strength reduction factor is not only the key factor to determine the design seismic force in the strength-based seismic design, but also the main basis for determining the inelastic response spectrum in the performance-based seismic design. , Improving the safety and economy of engineering structures, and deeply understanding the nature of ground motion are of great significance. [0003] The earlier research on the strength reduction factor should be attributed to the famous "equal energy principle" and "equal displacement principle" given by Newmark and Hall in the 1970s. This research has an important impact on the future research on the strength reduction factor. Since then, scholars have proposed many strength reduction factor models, but the existing strength reduction factor models do not reflect ...
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IPC IPC(8): G01V1/00G06F19/00
Inventor 翟长海谢礼立李爽
Owner HARBIN INST OF TECH