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Seismic damage evaluation of a steel building using stress triaxiality

Shama, A.A / Zarghamee, M.S / Ojdrovic, R.P / Schafer, B.W

AbstractThis paper presents a procedure for the evaluation of the seismic damage in steel moment frame buildings. The rotational capacities, of typical connections of a building in the Los Angeles area, which suffered extensive damage during the Northridge earthquake, were determined using stress triaxiality as an indicator for fracture. The rotational demands of the same connections were obtained from a three-dimensional finite element analysis of the building model. Comparisons of the rotational demands at several locations in the building to the rotational capacities determined by the stress triaxiality analysis showed that fracture of steel moment connections of the building are governed by the triaxiality of stresses. Based on a number of moment connections analyzed, the paper suggests a moment capacity equation for the pre-Northridge welded steel moment connections taking into account the fracture incidence due to stress triaxiality effect. The moment capacity of such connections as dictated by stress triaxiality compared favorably to FEMA-350 requirements.

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Seismic damage evaluation of a steel building using stress triaxiality

Shama, A.A / Zarghamee, M.S / Ojdrovic, R.P / Schafer, B.W

AbstractThis paper presents a procedure for the evaluation of the seismic damage in steel moment frame buildings. The rotational capacities, of typical connections of a building in the Los Angeles area, which suffered extensive damage during the Northridge earthquake, were determined using stress triaxiality as an indicator for fracture. The rotational demands of the same connections were obtained from a three-dimensional finite element analysis of the building model. Comparisons of the rotational demands at several locations in the building to the rotational capacities determined by the stress triaxiality analysis showed that fracture of steel moment connections of the building are governed by the triaxiality of stresses. Based on a number of moment connections analyzed, the paper suggests a moment capacity equation for the pre-Northridge welded steel moment connections taking into account the fracture incidence due to stress triaxiality effect. The moment capacity of such connections as dictated by stress triaxiality compared favorably to FEMA-350 requirements.

Seismic damage evaluation of a steel building using stress triaxiality

Shama, A.A / Zarghamee, M.S / Ojdrovic, R.P / Schafer, B.W

AbstractThis paper presents a procedure for the evaluation of the seismic damage in steel moment frame buildings. The rotational capacities, of typical connections of a building in the Los Angeles area, which suffered extensive damage during the Northridge earthquake, were determined using stress triaxiality as an indicator for fracture. The rotational demands of the same connections were obtained from a three-dimensional finite element analysis of the building model. Comparisons of the rotational demands at several locations in the building to the rotational capacities determined by the stress triaxiality analysis showed that fracture of steel moment connections of the building are governed by the triaxiality of stresses. Based on a number of moment connections analyzed, the paper suggests a moment capacity equation for the pre-Northridge welded steel moment connections taking into account the fracture incidence due to stress triaxiality effect. The moment capacity of such connections as dictated by stress triaxiality compared favorably to FEMA-350 requirements.

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Title:

Seismic damage evaluation of a steel building using stress triaxiality

Contributors:

Shama, A.A (author) / Zarghamee, M.S (author) / Ojdrovic, R.P (author) / Schafer, B.W (author)

Published in:

Engineering Structures ; 25 ; 271-279

Publication date:

2002-08-28

Size:

9 pages

ISSN:

DOI:

https://doi.org/10.1016/S0141-0296(02)00149-9

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Triaxiality , Moment frames , Finite element , Fracture , Moment connections

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