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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 7 Abstracts search results
Document:
SP240
Date:
October 4, 2006
Author(s):
Editor: Joseph M. Bracci / Sponsored by: ACI Committee 375
Publication:
Symposium Papers
Volume:
240
Abstract:
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. SP-240
DOI:
10.14359/18185
SP240-04
October 1, 2006
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.
10.14359/18292
SP240-05
Reinforced concrete frames must be proportioned to satisfy three limit states, serviceability, ultimate strength, and stability under sustained loads. Both the stability and serviceability limit states are directly related to frame lateral stiffness. The lateral stability analysis of concrete frames (P-? effect) requires a determination of frame stiffness. Lateral frame stiffness also affects many important building parameters such as building period, mode shapes, response to seismic loads, and the dynamic portion of the wind for tall buildings. In order to accurately estimate the lateral stiffness of concrete frames, the structural analysis must capture the contribution of all significant sources of frame deformation. The paper includes a detailed discussion of the various components that contribute to the total lateral deformation of frames. Recommendations are made for concrete frames to account for the elastic and nonlinear deformations that occur within the clear length of the members and inside the beam-column joint.
10.14359/18293
SP240-06
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.
10.14359/18294
SP240-01
J.M. Bracci
The paper provides an overview of the current design methodology for wind load based on ASCE-7 (2002) and IBC (2003). In addition, an attempt is made to identify the issues in developing a performance-based design methodology for wind loading, in particular for reinforced concrete frame buildings. Explicit comparisons of wind and earthquake loading on structural systems are made to leverage a discussion for a performance based wind design methodology. It is demonstrated that significant differences in performance based design methodologies will exist due to the nature of the loadings and the different design philosophies. Future research is required on establishing criteria for appropriate performance objectives and performance levels during serviceability and strength loading conditions.
10.14359/18289
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