Earthquake vulnerability of city regions based on building typology: rapid assessment survey

Satish, D.; Prakash, E. Lalith; Anand, K. B.

doi:10.1007/s42107-020-00339-8

Cited by 4 publications

(1 citation statement)

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“…As the references mentioned above, a suitable application of the time-domain substructure identification method and computational efficiency should be developed, which is also the objectives of this study. There are also some modern computing methods that have been applied in classification, identification, and, especially, seismic vulnerability and fragility/damage assessment [28][29][30][31]. These series methods do not require the finite element model of structures and can be applied in areas with a high density of earthquakes while it works differently from damage detection by a structural health monitoring system, which can conduct comprehensive analysis with the damage detection results from measurement data and vulnerability analysis.…”

Section: Introductionmentioning

confidence: 99%

Seismic Damage Assessment for Isolated Buildings with a Substructure Method

2022

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A seismic damage detection method for isolated buildings is proposed based on substructure identification with incomplete contaminated measurements. A concept of a pseudo substructure with virtual conditions is constructed for the proof of the proposed substructure identification method. This identification method is implemented in a two-stage procedure. The interface forces of the target substructure are identified in the first stage and the parameter of the target substructure is updated in the second stage, which can enable the parameter identification of substructures with unknown input. Two computational methods are also proposed to improve the two-stage identification algorithm. A sub-time zone identification method is utilized to reduce the computation effort and the simultaneous identification of the unknown force and initial structural responses is presented in the first-stage identification for a general case in practical engineering. Numerical studies of a shear frame with nonlinear base isolation subject to earthquake ground motion are investigated to validate the proposed seismic damage detection method. A fourteen-storey concrete shear wall building with a two-storey steel frame on top connected by isolation is studied experimentally with shaking table tests to further validate the proposed method. The shear wall structure is taken as the target substructure for damage assessment. The interface force and parameter of the concrete shear wall building are estimated with the proposed method. Results from both the numerical simulations and laboratory tests indicate that the proposed method can estimate seismic isolated structures and detect damage effectively based on only a few accelerometers. It is also demonstrated that the parameter identification results based on the structure response measurement during the earthquake are more accurate than the identification with post-earthquake structural response measurement.

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Section: Introductionmentioning

confidence: 99%