Performance and post-earthquake residual load carrying capacity of steel frames can be efficiently evaluated via the Incremental Dynamic Analysis (IDA) approach. Generally, reference is made only to the maximum transient inter-story drift for the damage assessment, but a more detailed evaluation can be also based on damage intensity measure (DM), which appears as a very promising technique to be adopted in routine design. The present paper is focused on existing Moment-Resisting (MR) steel frames, whose post-earthquake performance can be efficiently evaluated with reference to the additional DMs such as residual interstory drift, residual load carrying capacity and low-cycle fatigue damage. The discussed numerical applications are related to 4 planar frames differing for joints and members. Each DM has been appraised at the specific seismic intensity corresponding to design performance levels associated with immediate occupancy, life safety and pre-collapse. Research outcomes underline how the additional information obtained from the proposed DMs contributes to provide a more accurate prediction of the effective damage of the frames, with respect to the one based on the sole maximum transient inter-story drift.

ASSESSMENT OF THE RESIDUAL CAPACITY OF MR STEEL FRAMES VIA INCREMENTAL DYNAMIC ANALYSIS

M. Simoncelli;C. Bernuzzi;
2022-01-01

Abstract

Performance and post-earthquake residual load carrying capacity of steel frames can be efficiently evaluated via the Incremental Dynamic Analysis (IDA) approach. Generally, reference is made only to the maximum transient inter-story drift for the damage assessment, but a more detailed evaluation can be also based on damage intensity measure (DM), which appears as a very promising technique to be adopted in routine design. The present paper is focused on existing Moment-Resisting (MR) steel frames, whose post-earthquake performance can be efficiently evaluated with reference to the additional DMs such as residual interstory drift, residual load carrying capacity and low-cycle fatigue damage. The discussed numerical applications are related to 4 planar frames differing for joints and members. Each DM has been appraised at the specific seismic intensity corresponding to design performance levels associated with immediate occupancy, life safety and pre-collapse. Research outcomes underline how the additional information obtained from the proposed DMs contributes to provide a more accurate prediction of the effective damage of the frames, with respect to the one based on the sole maximum transient inter-story drift.
2022
The first international conference in India on structural steel - Indian Structural Steel Conference 2020
978-981-19-9390-9
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1222065
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