Abstract

In this paper, an experimental study aiming at understanding the seismic behaviour of dry stone retaining walls is presented. Harmonic shaking table tests have been carried out on scaled-down dry-joint retaining walls involving parallelepiped bricks. It is found that a thicker wall is more resistant and that a given retaining wall is less sensitive to higher frequencies. For those higher frequencies, the walls accept larger displacements before collapsing. The displacements start to occur from a given threshold, which depends on the wall geometry but not on the frequency of the base motion. The typical toppling failure is observed for slender wall and/or low frequency inputs. For less slender walls or higher frequency inputs, walls experience local sliding failures until the complete collapse of the system. The acceleration at failure reported during the dynamic tests has been compared to the corresponding pseudo-static resistance, enabling a conservative estimate of the seismic behaviour coefficient for pseudo-static analysis of this class of retaining walls. This novel experimental dataset is aimed to serve as a validating framework for future numerical or analytical tools in the field.

摘要

本文介绍了一项旨在了解干石挡土墙抗震性能的实验研究。谐波振动台测试已经在涉及平行六面体砖的按比例缩小的干接缝挡土墙上进行。研究发现，较厚的墙体具有更强的抵抗力，并且给定的挡土墙对较高频率的敏感性较低。对于那些更高的频率，墙壁在倒塌之前会接受更大的位移。位移从给定的阈值开始发生，这取决于壁的几何形状，但不取决于基础运动的频率。对于细长的墙壁和/或低频输入，观察到典型的倾倒故障。对于不太细长的墙壁或更高频率的输入，墙壁会经历局部滑动故障，直到系统完全崩溃。已将动态测试期间报告的失效加速度与相应的拟静力抗力进行了比较，从而能够对此类挡土墙的拟静力分析的地震行为系数进行保守估计。这个新颖的实验数据集旨在作为该领域未来数值或分析工具的验证框架。