A wave barrier—combining the advantages of trench-type wave barriers and metamaterials—is made by infilling the trench-type wave barrier with metamaterials. In this research, a series of full-scale field experiments are conducted to investigate the screening effectiveness of both empty trench and periodic barriers. The precast unit cells of periodic barriers are arranged to form one long barrier with a length of 2.44 m, one short barrier with a length of 1.22 m, or two short barriers with a length of 1.22 m to examine the influence of barrier length and the number of unit cells on the wave isolation performance. The state-of-the-art high-force triaxial (T-Rex) shaker truck is used to generate excitation in the vertical, horizontal inline, and horizontal crossline directions. Three excitation inputs are tested, including fix-frequency harmonic excitations, frequency sweeping excitations, and the earthquake excitation. For each test, a benchmark test is conducted prior to the barrier installation. The ground surface responses at each geophone location are recorded in all three directions. The normalized response of each point, the responses in front of the barrier and behind the barrier, and the frequency response function (FRF) are presented in detail. Test results show that the various excitation inputs lead to similar results. The performance of the periodic barrier is found to depend on the excitation directions due to the dominate wave form. By comparing the FRF between the benchmark case and the case with periodic barriers, the screening effectiveness of periodic barriers can be identified in some frequency ranges, which are expected to be the frequency band gaps of the periodic barriers.

通过将超材料填充到沟槽式防波堤中，从而形成了一种结合了沟槽式防波堤和超材料的优点的防波堤。在这项研究中，进行了一系列的大规模现场实验，以研究空沟和周期性势垒的屏蔽效果。周期性屏障的预制单元布置成形成一个长度为2.44 m的长屏障，一个长度为1.22 m的短屏障或两个长度为1.22 m的短屏障，以检查屏障长度及其影响。晶胞数量对波隔离性能的影响。最先进的高力三轴（T-Rex）振动台用于在垂直，水平串联和水平交叉线方向上产生激励。测试了三个激励输入，包括固定频率的谐波激励，扫频激励和地震激励。对于每个测试，在安装屏障之前都要进行基准测试。在所有三个方向上记录每个地震检波器位置的地面响应。每个点的归一化响应，栅栏前面和栅栏后面的响应以及频率响应函数（FRF）进行了详细介绍。测试结果表明，各种激励输入导致相似的结果。由于主波形，周期性势垒的性能取决于激励方向。通过比较基准案例和具有周期性障碍的案例之间的FRF，可以在某些频率范围内确定周期性障碍的屏蔽效果，这些频率范围有望成为周期性障碍的频带间隙。