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Airports

Airports

with the globally

with the globally increasing volume in air traffic, airport passenger terminal buildings (PtB) are being designed at unprecedented scale and increasingly employing landmark architecture and innovative structural design of support systems for the roof. cost effective design of these structures - often of unusual external envelope - is dictating light-weight design, making these roof structures highly sensitive to driving live loading such as wind and accumulated snow or sand. in order for sophisticate 3d structural modelling to deliver efficient structural design accurate loading scenarios are required for wind that account for complex fluid structure interactions including wind driven dynamic effects. arrival and departure areas are also sensitive to pedestrian wind comfort and the quality of the external microclimate in these areas requires careful consideration from an early stage in design. wind induced dynamic loading and sway of air traffic control towers (atct) is not very reliably predicted by codified methodology and can often be strongly affected by unsteady vortex flow phenomena, which can cause highly dynamic behaviour. air traffic controller comfort with respect to wind-induced sway of the atct is an imperative design requirement and requires specialist wind studies. Key services • wind climate analysis • structural load analysis for PtB and atct • Building motion / dynamic response analysis for atct • auxiliary damping system configuration for atct • Pedestrian wind comfort analysis / environmental impact assessment • Façade pressure analysis (wind and blast) for PtB the safety and operability of airports and heliports can be influenced by turbulence and wind shear, and by proximity to sources of hot gases as power stations. turbulence and wind shear is caused primarily by the local natural topography such as mountainous or hilly terrain and by proximity to the PtB and large aircraft hangers. the disruption to the natural wind flows can have a serious effect on the performance and controllability of fixed wing aircraft and helicopters, and can result in operational restrictions being placed on the airport or heliport under certain wind conditions. the presence of hot gases is also a potential hazard because increases in ambient air temperature reduce both lift and engine power. this is a particular issue for operations in close proximity to power generation equipment. these aerodynamic effects can be studied at the design concept stage, and the results used by aircraft operators and pilots to maximise the safe and efficient operation of the airport or heliport. Key BeneFits • • • • • • • cost effective structural design cost effective façade design optimised occupant comfort external microclimate control interactive solution development iterative design optimisation efficient and safe design against terrorist threat Wind Climate analysis the specification of design wind speeds for structural, serviceability and environmental design requires careful analysis of long-term wind statistics. Bmt has access to global wind record databases, which provide longterm wind statistics for extreme wind events including synoptic and non-synoptic wind patterns including e.g. typhoon, shamal, thunderstorm and monsoon winds. By application of sophisticated industry-standard wind models of the atmospheric boundary layer and extreme value statistical analysis of storm records, site-specific wind climate models are generated for each development that can also provide detailed resolution of wind directionality and probability of occurrence. where required, generic wind models are complemented through detailed modelling of non-synoptic wind patterns Non-synoptic Wind Profile Synoptic Wind Profile Design Wind Speeds Wind Frequency Data using approaches such as topography modelling and mesoscale models. wind climate studies are accepted throughout the world by local building departments and regulatory bodies as a basis of design and deliver a robust basis for reduction of inherent conservatism in code design winds. Hurricane nOaa/sCienCe PHOtO liBRaRy Tel: +44 20 8614 4400 Fax: +44 20 8943 3224 Email: enquiries@bmtfm.com Website: www.bmtfm.com

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