He, Zheng

Correlation Between Multi-Mode Global Damage, Mpa Storey Damage, and Interstory Drift of RC Frame

Abstract eng:
Structural global damage can be obtained either through weighted combination of local damage indexes (called the weighted method), or directly based on the change of vibration parameters (the macroscopic method). Determination of the weighting coefficients of the weighted method sometimes is not physically based, while the macroscopic method generally can not be desirable to localize local damage accurately and assess the degree of damage. But if they are used to assess the same structure damage, some internal connection must be exist. This paper attempts to explore the correlations between story damage, global damage and inter-story drift. A failure mode of RC frame is proposed, which can associate the storey damage with the global damage. The multi-mode global damage model is recommended in this paper. And the upper bound of the weighted storey damage (Park-Ang damage model) is modified (called MPA storey damage model). Through an example of plane RC frame, the relationship between the multi-mode global damage and the MPA storey damage as well as the inter-story drift is studied. By changing the location of the storey damage, the sensitivity of the modal damage to the storey damage is verified. Results show that global damage model, storey damage model and inter-story drift are corresponded well to each other when the location of stroey damage is low. As the location raises, inter-story drift deviate first and then the storey damage model. Simultaneously, proportion of fundamental modal damage decreases. As a consequence, inter-story drift is not suggested to be used as a damage and failure criterion but as a supplement. Further study need to be done on the correlation between modal damage indexes and storey damage location and severity. And the correlations between the damage models, under other failure modes, need to be research.

Contributors:

Guo, Xiang

Conference Title:

Proceedings of the 16th World Conference on Earthquake Engineering

Conference Title:

16th World Conference on Earthquake Engineering

Conference Venue:

Santiago (CL)

Conference Dates:

2017-01-09 / 2017-01-13

Rights:

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