ROOF WIND PRESSURES FOR DUOPITCH ROOF PERMEABLE BUILDINGS

• Main Authors: Sambu Potty, Narayanan, Kang , Seavhai
• Format: Conference or Workshop Item
• Published: 2014
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.utp.edu.my/11221/1/ROOF%20WIND%20PRESSURES%20FOR%20DUOPITCH%20ROOF%20PERMEABLE%20BUILDINGS_revised.pdf; http://eprints.utp.edu.my/11221/

Roofs of buildings have been observed to fail in wind storms. Traditionally in Malaysia, roof pressures are determined based on BS 6399-2 or MS1553. This paper presents the analysis of wind code provisions in the four major codes (BS 6399-2, MS 1553, EC1-1-4 and IS 875-3), including basic wind speeds, terrain categories and terrain multipliers, and general and local wind pressures on duo-sloped roof permeable buildings in Malaysia. For numerical comparison, the maximum wind speed recommended in MS 1553 namely 33.5 m/s has been used. The major differences in the codes include averaging time for wind speed, reference height of buildings, values of internal and external pressure coefficients. Eurocodes has been included in the context of its introduction in Malaysia, and IS 875-3 is another code from the tropical zone namely India. The study examines the conservativeness or not of the codes if used in the Malaysian context, even though they have been developed for a different wind climate and region. The results of the study are reported.