Banca de DEFESA: Douglas Maia Martins

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Douglas Maia Martins
DATE: 28/02/2024
TIME: 14:00
LOCAL: Plataforma Teams
TITLE:

Neighborhood Interference on the distribution of mean and peak pressures due to wind on tall building facades

KEY WORDS:

wind, neighborhood interference, tall building, mean and peak pressure coefficient.

PAGES: 141
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Estruturas
SPECIALTY: Mecânica das Estruturas
SUMMARY:

Tall buildings pose significant challenges for engineering and are constantly the subject of studies to analyze and assess structural behavior. Wind engineering plays a crucial role in determining the horizontal forces acting on the structure, especially in tall and slender buildings subject to significant neighborhood effects on safety, structural lifespan, and occupant comfort. This study conducted a local analysis of pressure distributions on facades for various neighborhood configurations around a standard building model tested in the wind tunnel Professor Joaquim Blessmann. The experiments were conducted by Lavôr (2023), allowing the identification of pressure changes caused by different neighborhood configurations compared to the isolated standard building model (without neighborhood) at each pressure measurement point. Instantaneous pressures were obtained through an electronic transducer for simultaneous measurements of fluctuating pressures at all 280 pressure taps on the model. Using the collected data, a Monte Carlo statistical method was implemented to estimate the peak pressure coefficient with a 78% probability of not being exceeded over a 50-year return period. To compare the data, mean and peak pressure coefficients were organized into spatial distribution and bar charts, which, after comparisons with NBR 6123:1988 and the model without neighborhood, revealed how the neighborhood distribution around a building can modify wind flow, altering the forces on each facade and leading to an increase in mean and peak pressure coefficients for certain neighborhood configurations. The analysis of the surrounding neighborhood of a tall building has proven to be a fundamental parameter for determining the horizontal forces due to wind.

COMMITTEE MEMBERS:
Presidente - ***.843.298-** - JOSE LUIS VITAL DE BRITO - UnB
Interna - 1225412 - GRACIELA NORA DOZ DE CARVALHO
Interno - 1111740 - GUILHERME SANTANA ALENCAR
Externo à Instituição - Thiarly Feitosa Afonso de Lavôr