What are the options for building a mosque for 5,000 people in Saudi Arabia?
I. Design codes and loading requirements
💖1. Saudi Building Code (SBC 301) Core Parameters
Seismic design: according to Class II site category, seismic acceleration of 0.25g, seismic force calculation using the equivalent lateral force method, the main structure displacement angle limit of 1/200.
Wind load: basic wind pressure is 0.75kN/m² (100-year return period), equivalent wind pressure is 1.2kN/m² after considering height coefficient, local wind suction coefficient is 1.5.
Snow load: reference to the historical data of Mecca area, the additional roof load is calculated as 0.5kN/m².
💖2. Functional space indicators
1.5000 people worship space needs main hall net area ≥3500m² (calculated at 0.7m²/person).
2.suggests a 45m x 80m rectangular plan, with a central dome 30m in diameter, flanked by wavy vaults.
II. Specialised disaster-resistant design
💖1. Wind-resistant design
1. Installation of deflector plate (angle 25°) in the gable to reduce vortex vibration.
2. Experimentally verified by Xuzhou Sufang Wind Tunnel: the wind pressure coefficient is reduced by 37% when the wind angle is 45°.
💖2. Seismic construction
1. Adopt double lateral force-resisting system: central dome as rigid frame + peripheral arch as articulated support
2. Viscous dampers (damping coefficient C=2500kN-s/m) are set up at 1/4 of the span.
III.Recommended technology mix programmes
💖protective structure:Aluminium-magnesium-manganese panels with vertical locking edges + photovoltaic
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