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Wind Analysis of Super Tall Structures with Double Layer Space Structure

  • Unique Paper ID: 172154
  • Volume: 11
  • Issue: 8
  • PageNo: 2031-2036
  • Abstract:
  • High demand for residential and business spaces and advancements in construction techniques have resulted in the massive construction of tall/high-rise buildings all around the world. According to the Council of Tall Buildings and Urban Habitat (CTBUH), there the number of tall buildings has an increasing trend with a projected addition of 175 tall buildings in 2020. As buildings become taller and with advances in construction techniques resulting in lighter and more flexible buildings, they become more susceptible to large-amplitude vibration. The slenderness for a tall building is defined by the ratio of the building’s height to the smallest plan dimension. It was found that the large-amplitude vibration can easily occur for tall buildings whose slenderness is greater than five or those that have a fundamental frequency of less than 0.2 Hz. Double-layer space structures, also known as space frames, have developed from the triangle concept as the most rigid geometry (Ambrose, 1994). The applications of this concept are commonly found in trusses as two-dimensional structures and in space structures as three-dimensional structures. Stevens (1975) categorizes space structures into single-layer and double-layer space structures. The three-dimensional action of single-layer space structures relies on their curved geometries, whereas the connection of the dual layers of space structures by diagonal members also create two-way action. Double-layer space structures have been commonly used for long-span horizontal structures such as domes, roofs and canopies because of their structural advantages. In these structures, gravity loads travel in two directions in the plan through all members to columns and then the foundations. This makes double-layer space structures more effective compared with planar trusses, which distribute loads in one way only In this present work we designed vertical double-layer space structures positioned on the (G+60,80 and 100) building perimeters in order to maximize their capacity to resist lateral load. In this work the aim is to analyses force distribution in the structure and determine appropriate structural member sizes. The second stage investigates and compares the impacts of wind and seismic loads on the structures. The next stage evaluates the sensitivity of changing structural geometry on structural weight and lateral deflection.
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  • ISSN: 2349-6002
  • Volume: 11
  • Issue: 8
  • PageNo: 2031-2036

Wind Analysis of Super Tall Structures with Double Layer Space Structure

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