Journal of Earthquake Engineering ( IF 2.6 ) Pub Date : 2020-11-26 , DOI: 10.1080/13632469.2020.1851316 Rui Zhang 1 , Mingwei Feng 2 , Yao Xiao 3 , Guanting Liang 4
ABSTRACT
This paper investigates the seismic bearing capacity of strip footings on undrained clay with single continuous square voids. Numerical studies for a wide range of geometric parameters and material properties are performed using adaptive finite element limit analysis (AFELA). Based on the pseudo-static approach, rigorous upper and lower bounds of the seismic bearing capacity for the strip footing are obtained, with relative errors of 4% or better. The calculated results are presented in the form of design tables and charts, and the effects of different governing parameters on the seismic bearing capacity are evaluated, including the size and location of the voids, the dimensionless strength ratio and the horizontal seismic coefficient. In addition, typical failure mechanisms are examined, and comparisons with previous studies are also conducted.
中文翻译:
带空隙不排水粘土条形基础的抗震承载力
摘要
本文研究了具有单个连续方形空隙的不排水粘土上条形基础的抗震承载力。使用自适应有限元极限分析 (AFELA) 对各种几何参数和材料特性进行数值研究。基于拟静力法,得到了条形基础抗震承载力的严格上下界,相对误差不超过4%。计算结果以设计表格和图表的形式呈现,评估了不同控制参数对抗震承载力的影响,包括空隙的大小和位置、无量纲强度比和水平抗震系数。此外,还检查了典型的失效机制,并与以前的研究进行了比较。