Vertical Dynamic Response of Rock-Socketed Piles in a Layered Foundation Chun Lin Liu, Shuo Zhang, Meng Xiong Tang, He Song Hu, Zhen Kun Hou and Hang Chen E3S Web Conf., 173 (2020) 04002 Published online: 09 June 2020 DOI: 10.1051/e3sconf/202017304002