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SIMULATION OF WIND-INDUCED AIRFLOW ROUND BUILDING MODELS WITH DIFFERENT ARRANGEMENT

Abstract

Purpose: The aim of this work is to study the variation in the pressure coefficients on the surface of the high-rise building model caused by turbulent currents created by the barrier with the similar geometrical parameters at longitudinal displacement. Methodology/approach: Aerodynamic parameters are experimentally investigated in specific conditions which simulate the real wind pressure applied to building models. Square prisms with the relative heights of 3 and 6 are selected for the models. Experiments are based on physical modeling of buildings using the dimensional analysis. Research focuses on the determination of dependence between the pressure coefficients at a lateral displacement of models relative to the longitudinal axis of the wind tunnel. Research findings: The following characteristics and processes are identified: the interaction between building models within the airflow; the area of the lowest wind pressure on the downwind model; the effect from the first and second airflow separations on air rarefaction along the model sides depending on the initial distance between models; the increase in the drag coefficient when the downstream model is left by the vortices formed by the front model; additional longitudinal and transverse forces when the downstream model is left by the vortices formed by the front model due to their longitudinal displacement; almost similar airflows round the second and the first models at a large transverse displacement. Practical implications: Research results can be readily used in calculations of dynamic loads on the building surfaces, engineering of natural and artificial ventilation systems, suspended facades, extensive translucent structures, and also for safe operation of high-rise buildings. The choice of the form of section and size of models allows using the obtained data on pressure not only in building construction, but also in other structures of the similar shape. Value: The obtained results represent new knowledge about aerodynamics of high-rise buildings and improving methods of and approaches to the structural analysis of building walls under complicated aerodynamic conditions.

About the Authors

A. I. Gnyrya
Tomsk State University of Architecture and Building
Russian Federation
DSc, Professor


S. V. Korobkov
Tomsk State University of Architecture and Building
Russian Federation
PhD, A/Professor


A. A. Koshin
Tomsk State University of Architecture and Building
Russian Federation
Senior Lecturer


V. I. Terekhov
Kutateladze Institute of Thermal Physics SB RAS
Russian Federation
DSc, Professor


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For citations:


Gnyrya A.I., Korobkov S.V., Koshin A.A., Terekhov V.I. SIMULATION OF WIND-INDUCED AIRFLOW ROUND BUILDING MODELS WITH DIFFERENT ARRANGEMENT. Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture. 2018;(4):65-73. (In Russ.)

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