報告題目：Casing String Subsidence in Permafrost: Mechanisms and Effectiveness of Countermeasures

報 告 人：楊朝暉 教授、博導

報告時間：6月7日  15:30-17:00

報告地點：明志樓A536

報告人簡介：

Dr. Yang joined UAA as an Assistant Professor on May 2003. He is currently a Professor of Civil Engineering and serves as the Chief Editor of the ASCE Journal of Cold Regions Engineering. He is the Chair of the 20th International Conference on Cold Regions Engineering, held in Anchorage, Alaska, from May 13 to 16, 2024. Dr. Yang's expertise is in geotechnical and earthquake engineering and has maintained an active research program with particular interests in cold regions-related topics with finding support from NSE, and other federal and state agencies. He has published more than 90 peer-reviewed journal articles and has been awarded five patents. Findings from his work on seismic design of deep foundations in frozen soil have been adopted by the Bridge Design Manual of AK DOT&PF and other northern states. Dr. Yang is the 2024 winner of the prestigious ASCE Harold R. Peyton Award for his outstanding contributions to cold regions engineering.

報告內容摘要：

This presentation will discuss issues associated with casing string subsidence during fossil energy production on Alaska's North Slope. The mechanisms of permafrost thaw and casing string loading will be introduced. The mechanical properties of permafrost during thaw will be presented in detail. A 3D elasto-plastic model of the casing string was used to analyze the stress distribution in the surrounding soil and casing string during permafrost thaw subsidence. Finally, the countermeasures to mitigate casing string damage due to permafrost thaw and their effectiveness will be discussed.

主辦單位：土木工程與測繪學院

科學技術發展研究院