A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Unresolved US Code Compliance Issues for Wind Energy Structures: The Need for Research
It has been roughly three decades of utility-scale wind farm development in the US without much clear guidance for the design and permitting of these structures. However, since late 2009 an effort has been underway to develop a US Recommended Practice for the design and permitting of wind energy structures. This task has been undertaken by a joint committee of the American Wind Energy Association (AWEA) and the American Society of Civil Engineers (ASCE). While the stated goal of a practical design guideline for Code compliance is straightforward, technical challenges and unresolved issues have been encountered during the Recommended Practice's development process. This paper describes several of those technical issues including the following: (1) Reconciling the regulatory requirements of American Code versus those of International and European wind industry commercial certification. (2) Reconciling the fatigue provisions of Eurocode and AISC. (3) Reconciling extreme wind speed profiles of ASCE and International Wind Turbine Standards (4) Establishing Code-compliant seismic design parameters and procedures for the combination of earthquake plus turbine operational loads. (5) Handling specialized design procedures used in the wind industry that are based on foreign reference documents that have not been translated into the English language. This paper discusses possible solutions and the ongoing efforts to resolve these technical issues. The paper also makes suggestions for needed research and calls for dedicated U.S. national leadership focused in shaping an industry that is known for producing safe and reliable structures that produce alternative and cost-effective energy.
Unresolved US Code Compliance Issues for Wind Energy Structures: The Need for Research
It has been roughly three decades of utility-scale wind farm development in the US without much clear guidance for the design and permitting of these structures. However, since late 2009 an effort has been underway to develop a US Recommended Practice for the design and permitting of wind energy structures. This task has been undertaken by a joint committee of the American Wind Energy Association (AWEA) and the American Society of Civil Engineers (ASCE). While the stated goal of a practical design guideline for Code compliance is straightforward, technical challenges and unresolved issues have been encountered during the Recommended Practice's development process. This paper describes several of those technical issues including the following: (1) Reconciling the regulatory requirements of American Code versus those of International and European wind industry commercial certification. (2) Reconciling the fatigue provisions of Eurocode and AISC. (3) Reconciling extreme wind speed profiles of ASCE and International Wind Turbine Standards (4) Establishing Code-compliant seismic design parameters and procedures for the combination of earthquake plus turbine operational loads. (5) Handling specialized design procedures used in the wind industry that are based on foreign reference documents that have not been translated into the English language. This paper discusses possible solutions and the ongoing efforts to resolve these technical issues. The paper also makes suggestions for needed research and calls for dedicated U.S. national leadership focused in shaping an industry that is known for producing safe and reliable structures that produce alternative and cost-effective energy.
Unresolved US Code Compliance Issues for Wind Energy Structures: The Need for Research
Agbayani, Nestor A. (author) / Vega, Rolando E. (author) / Newell, James (author)
Structures Congress 2011 ; 2011 ; Las Vegas, Nevada, United States
Structures Congress 2011 ; 2406-2416
2011-04-13
Conference paper
Electronic Resource
English
Unresolved US Code Compliance Issues for Wind Energy Structures: The Need for Research
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