Learning from the Mexican Earthquake of September 19, 1985: Behavior of Friction Pile Foundations for Buildings

本研究计划将探讨摩擦桩的行为 当受到垂直和横向的循环荷载时 方向 具体而言，该计划将涉及：（1）全面 在墨西哥城粘土的三桩组和两桩组的循环荷载试验 选择振幅代表荷载历史的单桩 1985年9月19日， 地震;（2）在这些荷载的现场进行循环压力计试验 评估粘土地基材料现场性能的试验 循环竖向模型桩试验 控制实验室环境，使用杆剪切装置开发 在加州大学洛杉矶分校，以评估土桩界面行为。

This research program will investigate the behavior of friction piles when subjected to cyclic loading in both the vertical and the lateral direction. Specifically, the program will involve: (1) full-scale cyclic load tests in Mexico City clay of a three-pile group and of two single piles with amplitudes chosen to represent the loading history experienced by pile foundations during the September 19, 1985 earthquake; (2) cyclic pressuremeter tests at the site of these load tests to evaluate the in-situ behavior of the clay foundation material under these conditions; and (3) cyclic vertical model pile tests in a controlled laboratory environment, using a rod shear device developed at UCLA, so as to evaluate the soil-pile interface behavior.