Comparison of Directional and Envelope Wind Load Provisions of ASCE 7

作者：Trautner Christopher A^*; Ojdrovic Rasko P

来源：Journal of Structural Engineering, 2014, 140(4): 04013100.

DOI：10.1061/(ASCE)ST.1943-541X.0000868

• Wind loads
• Structural design
• Structural failures
• Standards and codes
• Wind loads
• Structural design
• Structural failures
• Standards and codes
• Wind effects

ASCE 7-10 allows the design of the main wind force resisting system (MWFRS) of buildings with a mean roof height of less than 18.3m (60ft) by using either the directional procedure of Chapter 27 or the envelope procedure of Chapter 28 (sometimes referred to as the all heights and low-rise procedures, respectively). These two procedures were developed based on research that used very different methodologies to develop enveloped wind loads. As a result, the two methods may predict very different wind loads and subsequent structural behavior. This paper presents motivation for the research and a comparison of the structural demands calculated by using the two procedures; identifies some situations for which the low-rise procedures may give unconservative MWFRS member loads, proposes changes to the provisions, and identifies avenues for future research.

• 出版日期2014-4-1