Comparative Study on the Evaluation of Wind Load on Buildings Using Computational Fluid Dynamics and IS: 875(Part-3)
DOI:
https://doi.org/10.51983/ajeat-2018.7.1.891Keywords:
Computational Fluid Dynamics, Wind load, Coefficient of Pressure and ANSYS FluentAbstract
Tall Buildings are highly susceptible to wind induced lateral loads and is required to be designed with greater accuracy. The codal provision IS 875 (part 3) which is usually used, has a limitation that the coefficient of pressure Cpvalues available are, only for 0 and 90 degrees wind incidence angles and for standard cross sections of buildings only. Therefore wind tunnel experiments are carried out to measure wind loads which provide reliable results than the code. This Paper deals with, computational fluid dynamics, an alternative and highly dependable tool to predict the wind related phenomena on buildings. A numerical evaluation of wind pressure is done for the different cases of buildings in IS 875 part-3. Wind load obtained by using IS 875 part-3 are compared with the result obtained from CFD in ANSYS Fluent 15.0 and results are found to be in good agreement .The mean area weighted average values of Coefficient of pressure are also computed for various wind incidence angle.
References
P. Modi and A. Desai, "Wind Effects on Tall Buildings Having Skip Floor Using Computational Fluid Dynamics," in Proc. SARC International Conference, New Delhi, India, Mar. 26, 2017, ISBN: 978-93-86291-639.
A. K. Mittal, "Wind flow simulation in the vicinity of tall buildings through CFD," in Proc. APCWE-VIII, Chennai, India, pp. 682-690, Dec. 10-14, 2013.
A. K. Dagnew and G. T. Bitsuamlak, "Computational evaluation of wind load on buildings," Wind and Structures, vol. 16, no. 6, pp. 629-660, Jun. 2013.
Indian Standard for Code of practice for design loads for buildings and structures, IS 875 part 3 – 1987.
Fluent 14.5, User’s Guide (ANSYS Fluent Inc, Lebanon, USA) 2013.
B. Assaad, "Wind effect on Super Tall Buildings using CFD and Structural Dynamics," M.S. thesis, Dept. of Civil Engg., Florida Atlantic Univ., Florida, 2015.
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