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Sun 25 Feb, 2007 01:17 pm
dunno whether this is right section but what i want to know is are skyscrapers located specifically in relation to other nearby skyscrapers ? , given the close proximity do neighboring skyscrapers have effects on each other?- what about wind channels that get artificially created by lots of skyscrapers? - is this taken into account for a location? - what are the guidelines for skyscraper location?
also is a skyscraper at its most vunerable structurally to its ability to handle wind loads during its construction?
You already asked this, 15 days ago! What sycscrapers, what city, what country? I think "planning" or "zoning" are words you will find handy on Google.
does it matter what country? - as for type of skyscraper ......just tall vertical ones, i was referring to usa btw
tried the google advice , helpful but perhaps doesn't specifically answer my question
Design aspects of high rise buildings, including shape and structural framing, can be driven by wind performance considerations. Strength must be sufficient to resist shear and overturning forces from downwind (drag) and crosswind (lift) loads of severe storms. Stiffness should limit interstory drift to avoid damage to cladding and partitions in frequently-occurring storms. Lateral accelerations should be limited to provide occupant comfort in windy conditions. Early 20th Century skyscraper wind design focused on strength: the structural frame was sized to resist the full wind load. While not explicitly accounted for, the heavy masonry cladding and partitions of the time contributed considerable stiffness and damping. As a result, building drifts and accelerations were acceptably small. In the mid-20th Century, lightweight curtain wall cladding systems, gypsum board partitions and high strength steels were introduced. Structures sized for strength would be more flexible and less damped than before. So framing would often be up-sized to control interstory and overall building drift. This design approach provided generally acceptable occupant comfort in windy conditions for the buildings and uses of the time. Recent designs with different building proportions, framing systems and occupancies make satisfactory wind performance more challenging. Mixed-use towers may have steel framing and concrete framing systems on different levels of the same building to suit different occupancies. Non-rectangular floor plates alter wind load conditions on that building and those nearby. Occupant comfort critera are also better understood. Petronas Towers, Taipei 101, Bloomberg Building and Random House illustrate challenges posed by nontraditional building shapes, structural systems and wind environments, and solutions used to meet wind performance criteria. Features include long, slender elements subject to vortex shedding, articulated facades and stepped corners, concrete-over-steel framing, and unusual local wind climates. Solutions include stiffness, inherent damping and several types of supplementary damping.