Wake structure and aerodynamic excitation by an upstream interfering building | |
| Author | Osabel, Dave Montellano |
| Call Number | AIT Thesis no.ST-14-08 |
| Subject(s) | Spectrum analysis Aerodynamics Wakes (Aerodynamics) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-14-12 |
| Abstract | Wake structure and aerodynamic excitation by an interfering building situated upstream relative to a principal building were investigated. Standard Commonwealth Advisory Aeronautical Research Council (CAARC) tall building models were used in the conduct of this study with a simulated wind falling under an open-terrain exposure category. A hot-wire anemometer was used to measure the fluctuating wind velocity on the wake of the upstream building which were then used to calculate the turbulence intensity, Iu, of the wake. Overall base forces of the principal building were determined by the use of high-frequency force-balance (HFFB) technique while the local surface pressures at heights of 0.70H and 0.85H (where H is the height of the building model) of both the principal and interfering buildings were simultaneously measured by using pressure sensors. For a given grid location, spectral analyses of the local surface pressure on the windward face of the principal building and the wake showed almost similar energy distribution. However, in most configurations, the power spectral density (PSD) plots of the wake and the overall base responses of the principal building were not similar, particularly at the high frequency range. Correlation analysis between adjacent local surface pressures on the windward face showed little correlation due to frequently occurring small-scaled eddies in the wake. Moreover, the energy distribution of the overall forces and the pressure-integrated strip-forces showed similarity. Results in this study showed that the effect of the interfering building could be less for the overall response of a downstream building but very high on its local surface pressure. |
| Year | 2014 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-14-08 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai; |
| Examination Committee(s) | Punchet Thammarak;Anwar, Naveed ; |
| Scholarship Donor(s) | Ramon Magsaysay Memorial Colleges, Philippines; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2014 |