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Wind and Structures
  Volume 29, Number 3, September 2019, pages 209-223
DOI: http://dx.doi.org/10.12989/was.2019.29.3.209
 


Investigations of elastic vibration periods of tall reinforced concrete office buildings
Ali Al-Balhawi and Binsheng Zhang

 
Abstract
    The assessment of wind-induced vibration for tall reinforced concrete (RC) buildings requires the accurate estimation of their dynamic properties, e.g., the fundamental vibration periods and damping ratios. In this study, RC frame-shear wall systems designed under gravity and wind loadings have been evaluated by utilising 3D FE modelling incorporating eigen-analysis to obtain the elastic periods of vibration. The conducted parameters consist of the number of storeys, the plan aspect ratio (AR) of buildings, the core dimensions, the space efficiency (SE), and the leasing depth (LD) between the internal central core and outer frames. This analysis provides a reliable basis for further investigating the effects of these parameters and establishing new formulas for predicting the fundamental vibration periods by using regression analyses on the obtained results. The proposed constrained numerically based formula for vibration periods of tall RC frame-shear wall office buildings in terms of the height of buildings reasonably agrees with some cited formulas for vibration period from design codes and standards. However, the same proposed formula has a high discrepancy with other cited formulas from the rest of design codes and standards. Also, the proposed formula agrees well with some cited experimentally based formulas.
 
Key Words
    reinforced concrete; shear walls; office buildings; vibration period; wind load; space efficiency; leasing depth
 
Address
Ali Al-Balhawi: School of Computing, Engineering and Built Environment, Glasgow Caledonian University,
Cowcaddens Road, Glasgow G4 0BA, Scotland, UK;
Civil Engineering Department, Engineering College, Mustansiriyah University, Baghdad, Iraq
Binsheng Zhang: School of Computing, Engineering and Built Environment, Glasgow Caledonian University,
Cowcaddens Road, Glasgow G4 0BA, Scotland, UK
 

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