A method for constructing damage assessment model of rc frame structure layer

Abstract

The invention discloses a construction method of the damage estimation model of a RC (Reinforced Concrete) frame structure layer. The construction method comprises the following steps: 1) expressing the displacement damage indexes of each layer of beam and each layer of column in the RC frame structure as univariate functions; 2) distributing the cumulative plastic deformation energy distribution coefficient of each layer of beam in the RC frame structure according to a beam column energy consumption ratio, and determining the damage index of each layer of beam in the RC frame structure; 3) distributing the cumulative plastic deformation energy distribution coefficient of each layer of column in the RC frame structure according to the beam column energy consumption ratio to determine the damage index of each layer of column in the RC frame structure; 4) carrying out weighted combination on the damage indexes of each layer of beam and each layer of column in the RC frame structure according to the beam column energy consumption ratio to obtain the damage index of each layer of the RC frame structure; and 5) defining the expression of the ith layer of damage index of the RC frame structure as an ith layer of damage evaluation model of the RC frame structure. The construction method is convenient in implementation, reduces a calculation workload and does not generate a large accumulative error.

Description

technical field [0001] The invention belongs to the technical field of damage assessment of engineering structures, and in particular relates to a method for constructing a damage assessment model of an RC frame structure layer. Background technique [0002] To judge whether a structure can be repaired after an earthquake, it is necessary to know the degree of earthquake damage of the structure, which is especially important for post-earthquake disaster relief and post-disaster assessment. In my country, due to the implementation of new codes for seismic design of buildings, many high-rise buildings will be equipped with seismic observation systems or seismic experiments, and it is easy to obtain deformation data of structures under earthquakes. Therefore, it is urgent to provide technologies and methods to process these data. In order to build an earthquake damage assessment model, and then assess the damage degree of the structure, it provides technical support for the asse...

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Problems solved by technology

[0004] The existing two-parameter damage models mainly include: Park-Ang model, Kunnath model, Bracci model, Kumar model, Liu Jiajin Kumar improved model, Chai model, Bozorgnia model, Kratzig model, Niu Ditao model, Li Junqi model and Lu Dagang model, although the form is simple, However, most of them are improved models obtained by modifying the displacement damage item or energy dissipation damage item of the classic Park-Ang model. If the actual structure or the damage of each layer of the structure is to be evaluated, there are the following deficiencies: (1) more It is based on the damage index of the component to evaluate the damage of the structure or each layer, and the judgment result is greatly affected by the combination of the damage index of the component; (2) the damage assessment model needs to calculate the damage index of each component, and the calculation workload is large. Large and complex structures with a large number of components are difficult to realize, and are prone to large cumulative errors

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