October 10, 2025Open Access

Critical Response of Reinforced Concrete Moment-Resisting Frames with Steel Damper Columns Subjected to Sequences of Two Pulse-like Ground Motions

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Analysis reveals the impact of ground motion sequences on energy dissipation in reinforced concrete frames, suggesting design improvements.

The peak displacement of a reinforced concrete frame with steel dampers is larger during sequential ground motions if pulse velocities match.
Degradation in energy dissipation occurs notably when the damper strength is low and pinching behavior is significant in the beams.
An increase in response period is apparent in reinforced concrete frames under repeated input when pinching behavior is pronounced.
Nonlinear time history analysis indicates that the critical period of response from sequential pulses is longer compared to a single pulse.

Kenji Fujii (2025) studied this question.

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October 10, 2025Open Access

View Full Paper

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Authors

Analysis reveals the impact of ground motion sequences on energy dissipation in reinforced concrete frames, suggesting design improvements.

The peak displacement of a reinforced concrete frame with steel dampers is larger during sequential ground motions if pulse velocities match.
Degradation in energy dissipation occurs notably when the damper strength is low and pinching behavior is significant in the beams.
An increase in response period is apparent in reinforced concrete frames under repeated input when pinching behavior is pronounced.
Nonlinear time history analysis indicates that the critical period of response from sequential pulses is longer compared to a single pulse.

Kenji Fujii (2025) studied this question.

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