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タイトル
和文: 
英文:Design models for steel encased high-strength precast concrete piles under axial-flexural loads 
著者
和文: Thusoo Shreya, 小原拓, 河野 進, 宮原清.  
英文: Thusoo S., Obara T., Kono S., Miyahara K..  
言語 English 
掲載誌/書名
和文: 
英文:Engineering Structures 
巻, 号, ページ Vol. 228       
出版年月 2021年2月1日 
出版者
和文: 
英文:Elsevier 
会議名称
和文: 
英文: 
開催地
和文: 
英文: 
公式リンク https://doi.org/10.1016/j.engstruct.2020.111465
 
アブストラクト The use of steel-encased precast concrete (SC) piles has risen rapidly for the construction of earthquake-resilient foundation systems for buildings in Japan and Southeast Asia. SC piles are used near the pile-pile cap connection owing to their increased ductility, and resistance against large bending moments and axial forces, compared to the other precast concrete piles. However, there are no official guidelines available for the design of SC piles in severe earthquakes, except for a proposed draft by the AIJ committee for the determination of bending capacities. In this work, a database of 79 tests on SC piles, all tested under axial-flexural loads, was created. The bending capacities obtained from these tests were used to verify the provisions of the proposed draft and the provisions for composite member design in AIJ, Eurocode 4 and, AISC. Furthermore, a distributed plasticity formulation was adopted to develop a non-linear static model, that takes into account the concrete confinement and local buckling of steel casing, for prediction of moment and drift capacities. The accuracy of the model was verified against various experiments, and the capability to reproduce the moment-drift relations was confirmed.

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