Numerical Analysis of Laterally Loaded 3 × 3 to 7 × 3 Pile Groups in Sands
Numerical Analysis of Laterally Loaded 3 × 3 to 7 × 3 Pile Groups in Sands
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DOI：
10.1061/(asce)1090-0241(1999)125:11(936
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发表时间：
1999-11
影响因子：
3.9
通讯作者：
L. Zhang;M. McVay;P. Lai
中科院分区：
文献类型：
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作者：
L. Zhang;M. McVay;P. Lai
采用桥梁基础-上部结构耦合有限元程序FLPIER，对松散砂和中密砂中的单桩和3 × 3 ~ 7 × 3群桩进行了横向动力分析。采用McVay等人建议的多排桩横向受荷群桩的p-乘数因子进行预测。根据单桩试验结果，通过反分析程序得到的土壤参数。后者，以及数值预测的单个和组测试，提出。结果表明，FLPIER软件对单桩和3 × 3 ~ 7 × 3群桩的响应预测效果良好。后者涉及预测的水平荷载与横向变形的群体，剪切和弯矩的发展，并在每个桩排的横向荷载的分布，这都是与实测结果吻合良好。
The coupled bridge foundation-superstructure finite-element code FLPIER was employed to predict the lateral response of the single piles and 3 × 3 to 7 × 3 pile groups founded in both loose and medium dense sands. The p-multiplier factors suggested by McVay et al. for laterally loaded pile groups with multiple pile rows were implemented for the predictions. The soil parameters were obtained through a back-analysis procedure based on single pile test results. The latter, as well as the numerical predictions of both the single and group tests, are presented. It was found that the numerical code FLPIER did an excellent job of predicting the response of both the single piles and the 3 × 3 to 7 × 3 pile groups. The latter involved the predictions of lateral load versus lateral deflection of the group, the shears and bending moments developed in the individual piles, and the distributions of the lateral loads in each pile row, which were all in good agreement with the measured results.