Winkler model for dynamic response of composite caisson–piles foundations: Seismic response |
| |
| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;1. College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China;2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;3. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, PR China;4. Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, CO 80309-0428, USA;1. Department of Civil Engineering, Aalborg University, Thomas Manns Vej 23, 9220 Aalborg Ø, Denmark;2. Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA;1. MOE Key Laboratory of High-speed Railway Engineering, College of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. College of Civil Engineering, Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China;3. Faculty of Engineering, Department of Theoretical Mechanics, Dynamics and Vibrations, Université de Mons, Belgium;4. School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China;5. Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Fuzhou 350118, China;1. Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, College of Civil Engineering, Fujian University of Technology, China;2. Priority Research Centre for Geotechnical Science and Engineering, College of Engineering, Science and Environment, The University of Newcastle, Australia;3. Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, China;4. College of Engineering, Ocean University of China, China |
| |
| Abstract: | A simplified method with a dynamic Winkler model to study the seismic response of composite caisson–piles foundations (CCPF1) is developed. Firstly, with the dynamic Winkler model, the kinematic response of the CCPF subjected to vertically propagating seismic S-wave is analyzed by coupling the responses of caisson part and pile part. Secondly, a simplified model for the foundation–structure system is created with the structure simplified as a lumped mass connected to the foundation with an elastic column, and through the Fast Fourier Transformation (FFT) this model is enabled to solve transient seismic problems. Thirdly, the proposed method for the seismic response of CCPF-structure systems is verified by comparison against 3D dynamic finite element simulation, in which the Domain Reduction Method (DRM2) is utilized. Lastly, the mechanism and significance of adding piles in improving the earthquake resistance of the foundation and structure is analyzed through an example with different soil conditions. Discovered in this study is that adding piles under the caisson is an efficient way to increase seismic resistant capability of the soil–foundation–structure system, and the main mechanism of that is the elimination of the pseudo-resonance. |
| |
| Keywords: | Composite caisson–piles foundation Foundation–structure systems Winkler model Kinematic response Seismic response Pseudo-resonance |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
