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- Title
型钢混凝土梁柱节点损伤模型研究.
- Authors
段熙宾
- Abstract
At present, there is no definite index for damage assessment of steel reinforced concrete (Steel Reinforced Concrete, SRC) beam-column joints, and the damage degree after earthquake cant be analyzed digitally and intuitively. Therefore, based on the test data of typical SRC beam-column joints at home and abroad, the modified Park-Ang damage model is adopted, and the effects of beam-column section height ratio, axial compression ratio, beam-column steel content ratio and beam-column reinforcement ratio combination coefficient are introduced. The fitting formula of the combination coefficient is obtained through the nonlinear regression analysis of multivariable parameters, and the empirical value of the combination coefficient is given to determine the damage degree of SRC beamcolumn joints. Compared with the initial Park-Ang concrete member damage model, the modified model has less discreteness and higher accuracy, and is more suitable for SRC beam-column joint members. Meanwhile, to meet the seismic performance level of the three-level structure performance for “unbreakable under small earthquake, repairable under moderate earthquake and non-collapsing under large earthquake”, its performance is divided into three states: normal operation, life safety and near collapse according to the eigenvalues of its SRC beam-column joints, and the damage critical values are defined as 0. 1, 0. 55 and 0. 95 respectively.
- Subjects
BEAM-column joints; DAMAGE models; REINFORCED concrete; NONLINEAR regression; NONLINEAR analysis
- Publication
Railway Standard Design, 2022, Vol 66, Issue 7, p126
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202107140005