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Seismic behavior of batter pile groups embedded in liquefiable soil
Earthquake Engineering and Engineering Vibration ( IF 2.6 ) Pub Date : 2021-07-16 , DOI: 10.1007/s11803-021-2040-9
J. S. Rajeswari 1 , Rajib Sarkar 1
Affiliation  

A comparative study of the seismic performance of 2×1 pile groups considering different degrees of batter (0° for vertical, 10° and 20°) embedded in single homogeneous liquefiable sand through fully coupled three-dimensional dynamic analyses is presented. The effects of inertial interaction are considered with structures having two different periods. The performance of pile groups is investigated for the fixed and pinned pile to cap connections for both floating and end bearing types of pile groups. Slenderness ratios of piles were also varied to enable a comprehensive understanding. Investigations have been carried out for three earthquake motions having varied dominant frequencies. It is observed that batter pile groups in liquefiable soils provide beneficial effects on piles and superstructure responses for both fixed and pinned head pile to cap connections for long period structures. However, for short period structures, a beneficial effect is most evident for fixed head connection.



中文翻译:

可液化土中斜桩群的抗震性能

通过全耦合三维动力分析,对比研究了考虑不同倾斜度(垂直0°、垂直10°和20°)的2×1桩群在单一均质可液化砂土中的抗震性能。惯性相互作用的影响考虑了具有两个不同周期的结构。针对浮动和端承类型桩组的固定和固定桩与帽连接,研究了桩组的性能。桩的长细比也有所变化,以便全面了解。已经对具有不同主频率的三种地震运动进行了调查。据观察,可液化土壤中的斜桩群对长周期结构的固定和固定头桩与顶盖连接的桩和上部结构响应产生有益影响。然而,对于短周期结构,固定头连接的有益效果最为明显。

更新日期:2021-07-16
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