Pedestrian Level Wind Environment Around Buildings Microform

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Tall buildings can deflect wind down towards the ground, producing unpleasantly high speeds in pedestrian areas. Studies at model-scale in wind tunnels and at full-scale around existing buildings have made it possible to estimate the ratios of these speeds to the free, undisturbed wind speed at critical positions for common layouts and shapes of buildings. It is suggested that a design should aim to keep the mean wind speed at pedestrian level below 5 m/s for as much of the time as possible. Some examples of wind speed ratios are given and the likely occurrence of wind speeds greater than 5 m/s is estimated for particular sites. Remedies used to eliminate high wind speeds from pedestrian areas near to tall buildings are described. Situations are specified under which high priority should be given to the wind environment in the planning of redevelopment schemes. Designs that help to protect pedestrian areas from the downflow from tall buildings are outlined.

The book presents a state-of-the-art in environmental aerodynamics and the structural design of wind energy support structures, particularly from a modern computational perspective. Examples include real-life applications dealing with pollutant dispersion in the building environment, pedestrian-level winds, comfort levels, relevant legislation and remedial measures. Design methodologies for wind energy structures include reliability assessment and code frameworks.

ASCE 7 is the US standard for identifying minimum design loads for buildings and other structures. ASCE 7 covers many load types, of which wind is one. The purpose of this book is to provide structural and architectural engineers with the practical state-of-the-art knowledge and tools needed for designing and retrofitting buildings for wind loads. The book will also cover wind-induced loss estimation. This new edition include a guide to the thoroughly revised, 2010 version of the ASCE 7 Standard provisions for wind loads; incorporate major advances achieved in recent years in the design of tall buildings for wind; present material on retrofitting and loss estimation; and improve the presentation of the material to increase its usefulness to structural engineers. Key features: New focus on tall buildings helps make the analysis and design guidance easier and less complex. Covers the new simplified design methods of ASCE 7-10, guiding designers to clearly understand the spirit and letter of the provisions and use the design methods with confidence and ease. Includes new coverage of retrofitting for wind load resistance and loss estimation from hurricane winds. Thoroughly revised and updated to conform with current practice and research.