Study on the influence of traveling wave effect on Γ-type combined structure using equivalent simplified model
Laite Sun1,2, Yu Bai1,2, Zhengcong Lai1,2
1Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, Yunnan, China.
Plos One
|August 1, 2023
Summary
The seismic response of unconventional Γ-type structures is influenced by traveling wave effects. Increased time difference amplifies bending moments but initially reduces shear and axial forces, with effects varying by mass and stiffness ratios.
Area of Science:
- Structural Engineering
- Earthquake Engineering
- Seismic Analysis
Background:
- Γ-type combined structures are unconventional high-rise, long-span designs.
- The influence of seismic traveling wave effects on these structures is not yet researched.
Purpose of the Study:
- To investigate the seismic response of Γ-type structures under traveling wave effects.
- To establish an accuracy equivalent simplified model for analysis.
Main Methods:
- Developed an accuracy equivalent simplified model for Γ-type structures.
- Employed the modified large mass method for time history analysis.
- Analyzed seismic responses (shear force, axial force, bending moment) under varying conditions.
Main Results:
- Increased seismic wave time difference gradually increases bending moment.
- Shear force and axial force initially decrease then increase with time difference.
- Traveling wave effects are less severe than uniform excitation within a certain time difference range.
- Mass ratio variations (<10%) have minor effects; stiffness ratio variations (>20%) significantly impact responses.
Conclusions:
- Traveling wave effects significantly alter seismic responses in Γ-type structures.
- Time difference, mass ratio, and stiffness ratio are critical parameters influencing structural behavior.
- Findings provide crucial insights for the seismic design of novel high-rise, long-span structures.
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