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A nonlinear multi-parameter model for predicting floor acceleration amplification across diverse structural systems.

Rui Pan1, Yalin Yu2, Wenbin Zhang3

  • 1College of Civil Engineering, Qilu Institute of Technology, Jinan, China.

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|November 26, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a new model to predict floor acceleration amplification (FAA) during earthquakes, improving seismic design for non-structural components. The model offers better accuracy than current methods, enhancing building safety and reducing economic losses.

Keywords:
Floor acceleration amplificationFundamental periodIncremental dynamic analysisNon-structural componentsStrength ratio

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Area of Science:

  • Structural Engineering
  • Earthquake Engineering
  • Seismic Hazard Analysis

Background:

  • Non-structural components are vulnerable to earthquake damage, causing significant economic losses and functional disruptions.
  • Accurate prediction of floor acceleration amplification (FAA) is essential for seismic design of acceleration-sensitive non-structural elements.

Purpose of the Study:

  • To develop and validate a nonlinear multi-parameter model for predicting floor acceleration amplification (FAA).
  • To quantify the influence of various structural parameters on FAA distribution across different building types.

Main Methods:

  • Incremental Dynamic Analysis (IDA) was performed on reinforced concrete, steel, and composite structures.
  • The study analyzed the impact of relative height, fundamental period, strength ratio, and structural system type on FAA.
  • A novel approach for estimating the fundamental period was proposed, moving beyond traditional relative height reliance.

Main Results:

  • The proposed model demonstrated superior predictive accuracy for FAA compared to existing methods and numerical simulations.
  • Validation against 59 instrumented building records confirmed the model's reliability across diverse structural conditions.
  • The research identified key parameters influencing FAA, including fundamental period and structural system type.

Conclusions:

  • The developed nonlinear model enhances the theoretical understanding and practical application of seismic design for non-structural components.
  • The findings address limitations in current seismic code provisions, offering improved safety and economic protection for buildings.
  • This research provides a more accurate tool for engineers to design resilient structures against seismic events.