Seismic response of non-structural components attached to multi-storey steel frames
File(s)
Author(s)
Ding, Xiapeng
Type
Thesis
Abstract
This thesis investigates the elastic and inelastic seismic response of non-structural components mounted within multi-storey steel moment-resisting framed structures and derives predictive relationships for their displacement and acceleration demands. Non-structural components with a wide range of dynamic characteristics and force reduction factors are considered. Over 200 multi-storey regular and irregular frames of different heights are included and designed according to the provisions of Eurocode 8. Detailed nonlinear time history analyses are conducted under realistic earthquake loading, employing a large set of 100 ground motion records from both far-field and near-field sources. The influence of the ground motion type and the inelasticity level in both the primary frames and the non-structural secondary components is examined in detail using incremental dynamic response history analysis. Based on the results, representative relationships for predicting the inelastic displacement ratios within the non-structural components are proposed. In addition, various provisions stipulated in current design guidance for determining the spectral accelerations are critically evaluated and improvements are suggested with due consideration for the inelasticity of both the non-structural components and the primary structures. Moreover, the influence of vertical irregularities within the primary frames of various heights and designs is examined. Based on the detailed results, the predictive equations developed for regular primary structures are extended and modified to account for the influence of irregularity in evaluation on the inelastic displacement ratios, acceleration response, and applied forces, for the non-structural components. These findings are also examined for non-structural components mounted at each individual floor rather than solely addressing the roof level of the primary structures. Finally, the practical application of the proposed prediction procedures is illustrated through two selected regular and irregular frames. The thesis concludes with a summary of the main findings and observations along-side suggestions for future research.
Version
Open Access
Date Issued
2024-11-29
Date Awarded
2025-04-01
Copyright Statement
Attribution-NonCommercial 4.0 International Licence (CC BY-NC)
License URL
Advisor
Elghazouli, Ahmed
Publisher Department
Department of Civil and Environmental Engineering
Publisher Institution
Imperial College London
Qualification Level
Doctoral
Qualification Name
Doctor of Philosophy (PhD)