Dynamic analysis of a layered half-space subjected to moving line loads |
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| Institution: | 1. Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, 78712-0273, TX, USA;2. Department of Civil and Environmental Engineering, Seoul National University, Seoul, 151-744, Republic of Korea;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300354, China;2. Department of Civil Engineering, Northwestern Polytechnical University, Xi’an 710072, China;1. Federal Institute for Materials Research and Testing, 12200 Berlin, Germany;2. University of Duisburg-Essen, 45141 Essen, Germany;1. State Key Laboratory of Coast and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. Institute of Earthquake Engineering, Dalian University of Technology, Dalian 116024, China;1. Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing, 100044, China;2. School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China |
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| Abstract: | Using a thin-layer method enhanced by continued-fraction absorbing boundary conditions, dynamic responses of a layered half-space subjected to a series of constant and time-harmonic line loads moving at a constant speed are studied. The thin-layer method for moving line loads is formulated for plane-strain as well as antiplane-shear conditions and is verified by comparison of computed responses of a homogeneous half-space subjected to a single constant load on its surface against available analytical solutions. Next, time-harmonic loads on a homogeneous half-space are examined. The study continues with both constant and time-harmonic loads on a layered half-space. Finally, multiple constant and time-harmonic loads are considered. The formulation and results demonstrate the effectiveness and versatility of the method in problems of dynamic response of layered media to moving loads. |
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