Equivalent elastic analysis method of buckling restrained braced structures based on elastoplastic modification

一种屈曲约束、弹性分析的技术，应用在效弹性分析领域，能够解决计算过程复杂、工程设计人员难以掌握等问题，达到确定方法简单、方便掌握的效果

Active Publication Date: 2018-11-27
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

[0003] However, the equivalent elastic method needs to determine the stiffness reduction of the buckling-constrained brace in the moderate earthquake analysis and the additional damping ratio of the entire beam-column structure after considering the energy dissipation of the buckling-constrained brace. At present, the equivalent linearization method is usually used, and the equivalent linearization method requires Repeated iterative calculations, the calculation process of this method is relatively complicated, and it is difficult for ordinary engineering designers to master

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Embodiment Construction

[0024] The equivalent elastic analysis method of the elastic-plastic correction-based buckling-constrained support structure provided by the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] Small earthquake response spectrum analysis is carried out on the buckling restrained brace structure, and the seismic performance-based design method is used to set the performance of the beam-column structure connected to the buckling restraint brace as non-yielding in moderate earthquakes or non-yielding in large earthquakes. Through the above analysis, the beam-column structure is obtained The initial reinforcement is used as the initial reinforcement for the elastoplastic time history analysis of the beam-column structure or the elastoplastic time history analysis of the large earthquake.

[0026] Using the initial reinforcement of the beam-column structure obtained from the above analysis, the elasto-plastic time-...

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Abstract

An equivalent elastic analysis method of buckling restrained braces based on elastoplastic correction. The initial reinforcement of the beam-column structure is obtained by analysis. The maximum internal force of the buckling restrained braces is obtained by using the horizontal earthquake action standard value of the beam-column structure and the displacement corresponding to the horizontal earthquake action standard value. Calculate stiffness reduction coefficient; The overall additional damping ratio of beam-column structures under moderate or large earthquakes is obtained. Reinforcement results of beam-column structures under moderate or large earthquake equivalent elasticity analysis are obtained. The invention relates to an equivalent elastic analysis method of a buckling restrainedbrace structure based on an elastoplastic modification, As that problem that the stiffness of buckle restrained brace and the additional damping ratio of beam-column structure are difficult to determine in the existing equivalent elastic analysis method are sol, The method for determining the stiffness of the buckling restrained brace and the additional damping ratio of the beam-column structure is simple, and is convenient for engineers to master. The user can complete the performance-based design of the buckling restrained brace structure according to the method.

Description

technical field [0001] The invention relates to an equivalent elastic analysis method of a buckling-constrained support structure based on elastic-plastic correction, and belongs to the technical field of shock-absorbing design of building structures. Background technique [0002] Beam-column structures such as frames or frame-tubes braced with buckling constraints are designed to meet the seismic performance, and beam-column structures connected with buckling-constrained braces need to be reinforced according to non-yielding in moderate earthquakes; elastic-plastic analysis methods can only be used for beam-column structures However, the reinforcement calculation of the beam-column structure cannot be carried out; the equivalent elastic method is usually used for the calculation of the reinforcement reinforcement of the medium earthquake. [0003] However, the equivalent elastic method needs to determine the stiffness reduction of the buckling-constrained brace in the moder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E04H9/02E04B1/98
CPCE04H9/021G06F30/13G06F2119/06
Inventor 黄信齐麟李岳
Owner CIVIL AVIATION UNIV OF CHINA
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