Model tests on nonlinear vibration characteristics of single piles with different length-diameter ratios under lateral loading in sand
GUO Yan-chao1, 2, LIU Huan1, 2, HUANG Mao-song1, 2
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
Soil nonlinearity around the pile becomes significant under lateral dynamic loading. Several laboratory model tests were conducted to investigate the nonlinear behavior of laterally loaded piles with different length-diameter ratios in sand, and to analyze the influence of loading amplitude and pile's length-diameter ratio on the nonlinearity. Test results show that the higher load amplitude leads to much stronger pile-soil nonlinear interaction and lower resonant frequency of the pile-soil system. The resonant frequency of the pile-soil system as well as its attenuation rate is negatively correlated with the pile's length-diameter ratio in case of the same pile diameter.
郭彦超, 刘欢, 黄茂松. 砂土中不同长径比单桩水平非线性振动特性模型试验[J]. 岩土工程学报, 2015, 37(zk2): 57-60.
GUO Yan-chao, LIU Huan, HUANG Mao-song. Model tests on nonlinear vibration characteristics of single piles with different length-diameter ratios under lateral loading in sand. Chinese J. Geot. Eng., 2015, 37(zk2): 57-60.
 NOGAMI T, OTANI J, KONAGAI K, et al. Nonlinear soil-pile interaction model for dynamic lateral motion[J]. J Geotech Eng, ASCE, 1992, 118(1): 89-106.
 EL Naggar M H, NOVAK M. Non-linear model for dynamic axial pile response[J]. J Geotech Engng, ASCE, 1992, 118: 89-106.
 BOULANGER R W, CURRAS C J, KUTTER B L, et al. Seismic soil-pile-structure interaction experiments and analysis[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 1999, 125(9): 750-759.
 EL Naggar M H, BENTLEY K J. Dynamic analysis for laterally loaded piles and dynamic p - y curves[J]. Canadian Geotechnical Journal, 2000, 37: 1166-1183.
 GLE D R, WOODS R D. Predicted versus observed dynamic lateral response of pipe piles[C]// Proc of the 8th World Conference on Earthquake Engineering, 1984: 905-912.
 MANNA B, BAIDYA D K. The nonlinear coupled response of single and group piles under various horizontal excitations: experimental and theoretical study[J]. Geotechnical Testing Journal, 2012, 35(6): 1-15.
 GOIT C S, SAITOH M, MYLONAKIS G, et al. Model tests on horizontal pile-to-pile interaction incorporating local non-linearity and resonance effects[J]. Soil Dynamics and Earthquake Engineering, 2013, 48: 175-192.
 LOMBARDI D, BHATTACHARYA S, WOOD D M. Dynamic soil-structure interaction of monopile supported wind tubines in cohesive soil[J]. Soil Dynamic and Earthquake Engineering, 2013, 49: 165-180.
 童建波, 高 明. 侧向受载排桩的动力试验和非线性分析[J]. 水利水运科学研究, 1989(4): 65-80. (TONG Jian-bo, GAO Ming. Dynamic test and nonlinear analysis of row piles under lateral load[J]. Hydro-Science and Engineering, 1989(4): 65-80. (in Chinese))