Improved Performance of Connected Foundations for Resilient Energy Transmission Infrastructure in Soft Soils

Doohyun Kyung, Daehong Kim, Garam Kim, Incheol Kim and Junhwan Lee
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Doohyun Kyung: School of Civil and Environmental Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea
Daehong Kim: Korea Electric Power Corporation, 105, Munji-ro, Yuseong-gu, Daejeon 34056, Korea
Garam Kim: School of Civil and Environmental Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea
Incheol Kim: School of Civil and Environmental Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea
Junhwan Lee: School of Civil and Environmental Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea

Sustainability, 2015, vol. 8, issue 1, 1-15

Abstract: The connected foundation is an effective structural type of foundation that can improve the sustainability of electrical transmission towers in soft soils to serve as a resilient energy supply system. In this study, the performance of electrical transmission towers reinforced with connected beams was investigated using a series of field load tests. Model transmission tower structures were manufactured and adopted into the tests. Based on the load capacity mobilization and failure mechanism, a criterion to define the load carrying capacity for connected foundation was proposed. It was found that the performance of connected foundation varies with the mechanical property of connection beam. The load capacity and differential settlement increased and decreased, respectively, with increasing connection beam stiffness. Such effect of connection beam was more pronounced as the height of load application point or tower height (z h ) increases. Based on the load test results, a design model was proposed that can be used to evaluate the sustainable performance and load carrying capacity of connected foundations. Field load tests with prototype transmission tower structure models were conducted to check and confirm the performance of connected foundation and the proposed design method.

Keywords: resilient energy infrastructure system; electrical transmission tower structures; connected foundation; soft soils; field load test; load capacity; differential settlement (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2015
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