Seismic design of rectangular/square columns in SDOF systems based on their damage performance

Area of Science:

• Structural Engineering
• Earthquake Engineering
• Materials Science

Background:

• Established quantitative relationships between energy dissipation, deformation, and design parameters for RC members.
• Proposed damage index based on energy dissipation capacity and performance limits.

Purpose of the Study:

• Develop a seismic design method for RC square/rectangular column members in Single-Degree-of-Freedom (SDOF) systems based on damage performance.
• Provide a practical example to illustrate the application of the proposed method.

Main Methods:

• Utilized established quantitative relationships between energy dissipation capacity and structural design parameters.
• Developed a novel seismic design method integrating damage performance considerations.
• Applied the method to a specific example for demonstration.

Main Results:

• The proposed method establishes a clear quantitative link between structural design parameters and seismic parameters, aiding structural design.
• Increased transverse reinforcement ratio reduces RC column damage up to a certain threshold.
• Extended earthquake duration exacerbates RC column damage, with an effect that intensifies rapidly then slows.

Conclusions:

• The new seismic design method offers practical guidance for structural design.
• The method addresses the limitation of current seismic codes by incorporating the effect of earthquake duration.
• This approach enhances the seismic resilience of RC column members by considering damage performance comprehensively.