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Several structural models and collapse criteria are analysed.
Collapse criteria under different planar stress states were built and are supported by high temperature experiments.
However, these collapse criteria may not accurately represent the overall collapse behavior of structural systems due to redistribution and variation of damage within the structure.
This IDA approach often uses collapse criteria given in terms of a large value of the maximum inter-story drift ratio, plastic hinge formations at structural components, or flattening of the IDA curve.
Open image in new window Figure 4 Results of the collapse criteria investigations.
Open image in new window Figure 3 Investigation of collapse criteria.
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Ultimate strength predictions are made using the von Mises' yield criterion applied to the membrane stresses as collapse criterion.
This research work focuses on developing seismic fragility curves for a collapse criterion based on hysteretic degradation.
For each structure, fragility curves were developed for a collapse criterion, where collapse is simulated explicitly through the degrading constitutive models.
The results show that the proposed energy-based seismic collapse criterion is a more reliable option for assessing structural collapse of planar frames.
For each sub-service a collapse criterion is defined, by which the strength is compared to the action load, both represented as random variables.
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