The Effect of Earthquake Vertical Component on the Response of Cantilever Beams in Multi-Storey Reinforced Concrete Building
Date
2021-07-15
Authors
البيك, أحمد محمود سليم
Journal Title
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Publisher
An-Najah National University
Abstract
Structural design to withstand seismic loading is mainly governed by horizontal ground motion, and the effects of vertical ground motion have long been considered insignificant or secondary. However, an emerging evidence indicates that vertical ground motions have significant destructive potential, especially under specific site conditions. Evidence suggests that the vertical component of ground motion is more important than previously thought, especially for events close to the fault and when buildings have a cantilever beam. The purpose of this thesis is to investigate the effect of vertical component of earthquake on the response of cantilever beams of multi-story reinforced concrete building. Finite Element (F.E) analysis using available commercial software (Etabs) is used to investigate the effect of vertical component of earthquake on cantilever beams in 2D and 3D models with different cases. The models are verified by comparing the periods of models to hand calculation of single degree of freedom. Many different models have been constructed with different cases.
The results show that the equivalent static equation in ASCE 7-16 (0.2SDS D) code can be considered to be conservative for structures with seismic design category (B). A proposed equivalent static equation is suggested to account for the effect of vertical components of earthquake on the response of cantilever. The proposed equation is generally conservative for most of the cases with different seismic deign categories (B, C, D).