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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 7 Abstracts search results
October 4, 2006
Editor: Joseph M. Bracci / Sponsored by: ACI Committee 375
This CD-ROM contains 6 papers that were presented at the technical session on Performance Based Design for Wind Loads, held San Francisco, CA, in Fall 2004. Topics include an overview of performance-based design, the nature of wind loading and wind tunnel testing, structural modeling assumptions, components of lateral deformations in buildings, and the types of concrete structural systems for wind loading.
Note: The individual papers are also available. Please click on the following link to view the papers available, or call 248.848.3800 to order.
October 1, 2006
D. Boggs and J. Dragovich
The elements of dynamic response are presented. Using the model of a single degree of freedom oscillator, the nature of wind loads and their effect on dynamic response are discussed. The results of the response of a single degree of freedom oscillator are used to describe the current building code procedures. The measured damping in structures is presented and conclusions regarding the appropriate level of damping to use as a function of drift are presented. Finally, issues related to the use of load factors are highlighted.
M.C. Mota and B.S. Taranath
Reinforced structural concrete, known to humans since the 19th century, offers a variety of structural systems suitable to economically resist lateral loads for low, medium and high-rise structures. The selection of the most economical lateral force-resisting system depends on several factors including but not limited to: number of floors, lateral load demand, use and speed of construction.Two types of lateral loads typically considered in building design are wind and seismic loads. In designing for wind, a building is studied with due regard to its surroundings because nearby buildings and land configurations may have a substantial influence on wind loads. There is scant evidence that winds, except those due to tornado or hurricane, have caused major damage to buildings. However, modern buildings with lightweight curtain walls, dry partitions, and high-strength materials are more prone to wind-induced problems than their earlier predecessors.The objective of this paper is to discuss the economical application of several types of lateral force-resisting concrete systems by primarily providing a range of floors for which each lateral force-resisting system is economical. Each system will be discussed by providing a definition as well as advantages. Also, six case studies have been included for further discussion.
D. Boggs and A. Lepage
Wind-tunnel testing is introduced as a means of providing accurate design loads for the structural frames of buildings in a timely and economic manner, overcoming the inherent limitations of code and analytical procedures. Various types of model tests and their relative advantages are described. The nature of the information that the building’s structural engineer must supply to the wind consultant, and the loading information that can be expected in return, are investigated through examples and explanation.
J.F. Horvilleur, V.B. Patel, and K.A. Young
Reinforced concrete buildings must be proportioned to satisfy three limit states, serviceability, ultimate strength, and stability under sustained loads. This paper includes a detailed discussion of the recommended procedures and assumptions to be used in the design of reinforced concrete buildings for wind loads at these various limit states. Definition of the appropriate lateral load intensity, consideration of the structural parameters to be considered in the analysis, and discussion of suitable acceptance criteria is included. Differences in member properties at the limit states are prescribed based on variations in the degree of member cracking that can be expected at the load levels under consideration. The accurate prediction of the lateral stiffness of flat slab frames is also discussed. A summarization of the proper procedure and parameters to be used in the analysis of second order effects (P-?) is provided. Various other parameters affecting the analyses of buildings under sustained loads are addressed, including beam-column joint stiffness, foundation fixity, etc.
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