The objective of this project is to aid and assist in preparing a new survey to assess the current state of the art in wind drift design of steel buildings. This is necessary given the significant advances we have seen in the Field since the last survey, nearly twenty years ago, when the use of computers was just becoming commonplace:
- Powerful technological and computing resources have revolutionized the way structures are designed. Today including all sources of deformation, accurately modeling the panel zone regions, performing direct second order analysis and accounting for foundation flexibility are all within reach for the typical firm.
- Optimization techniques are commonly integrated in design software, enabling designers to achieve a level of structural performance and economy that was previously difficult if not impossible.
- Wind loading in building codes has changed as has the typical return interval used in design for serviceability issues of drift.
- The complex nature of wind effects on structures is better understood. Wind tunnel testing continues to advance while becoming more affordable.
It is extremely important to gain an overview of the ways in which these advances have affected the state of the art and to bring these changes, positive and negative, to the attention of the community. Since serviceability limit states are not codified the way they are handled may differ considerably from firm to firm; these differences will be brought to light. Through the use of the internet as a distribution tool and the assurance of anonymity, the survey is expected to receive many more respondents than the first survey (thirty-five responses). This will provide for a more complete and accurate assessment of the art.