Model testing for influence of different foundation vibrations on dynamic response of ground surface
DING Guangya1, 2, WU Junlong1, DAI Pengyan3
1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou 325035, China；
2. Zhejiang Provincial Key Lab of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation, Wenzhou 325035, China；
3. Zhejiang Exploration Institute of Geotechnical Engineering, Shaoxing 312099, China
Abstract：Dynamic foundation is widely used in modern industry, and it can produce vibration influence on the surrounding environment in its operation process. Through constructing a large model slot indoor, 16 foundations with different shapes and materials were poured. Then dynamic parameters of sand soil were measured with a bender-extender element test. Vibration tests for a single foundation and two adjacent foundations under conditions of different shapes, stiffnesses and buried depths were conducted, respectively. Their vibration propagation features and law were analyzed. The test results were compared with those in existing literatures. The results showed that the wave form and frequency of vibration sources obviously affect foundation vibration; vibration velocity amplitude of soil for a strip foundation is the maximum, that for a square one is the second large, and that for a cylinder one is the smallest; the vertical vibration velocity amplitude of measured points in soil decreases with increase in stiffness and height of foundations and decrease in buried depth of foundations; the vibration velocity amplitude of measured points in soil decreases with increase in the distance between two adjacent foundation centers; compared with a single foundation vibration, the overall attenuation characteristic of sand layer vibration velocity amplitude when two foundations interact is similar to the vibration velocity amplitude attenuation feature at the point on the single foundation with a certain distance from vibration source. The results provided a reference for the optimization design of dynamic foundations and the vibration protection of surrounding environment.
丁光亚1, 2，吴俊龙1，戴鹏燕3. 不同基础振动对地表动力响应影响的模型试验[J]. 振动与冲击, 2018, 37(2): 197-203.
DING Guangya1, 2, WU Junlong1, DAI Pengyan3. Model testing for influence of different foundation vibrations on dynamic response of ground surface. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 197-203.
[1] Mira A, Luco J E. Dynamic response of a square foundation embedded in an elastic half-space[J]. Soil Dynamics and Earthquake Engineering, 1989, 8(2): 54-67.
[2] Azam G, Hsieh C W, Wang M C. Performance of strip footing on stratified soil deposit with void[J]. Journal of Geotechnical Engineering, 1991, 117(5): 753-772.
[3] Japon B R, Gallego R, Dominguez J. Dynamic stiffness of foundations on saturated poroelastic soils[J]. Journal of Engineering Mechanics, 1997, 123(11): 1121-1129.
[4] Jaya K P, Prasad A M. Embedded foundation in layered soil under dynamic excitations[J]. Soil Dynamics and Earthquake Engineering, 2002, 22(6): 485-498.
[5] Mandal A, Baidya D K, Roy D. Dynamic response of the foundations resting on a two-layered soil underlain by a rigid layer[J]. Geotechnical & Geological Engineering, 2012, 30(4): 775-786.
[6] Wang Peng, Cai Yuanqiang, Xu Changjie, et al. Rocking vibrations of a rigid circular foundation on poroelastic half-space to elastic waves[J]. Soil Dynamics and Earthquake Engineering, 2011, 31(4): 708-715.
[7] Ronald Y S Pak，Mahdi Soudkhah，Jeramy C Ashlock. Dynamic behavior of a square foundation in planar motion on a sand stratum[J]. Soil Dynamics and Earthquake Engineering, 2012, 42: 151-160.
[8] Chen Shi-Shuenn, Liao Ke-Hung, Shi Jun-Yang. A dimensionless parametric study for forced vibrations of foundation-soil systems[J]. Computers and Geotechnics, 2016, 16: 184-193.
[9] Chen Shi-Shuenn, Liao Ke-Hung, Shi Jun-Yang. Parametric investigation for rigid circular foundations undergoing vertical and torsional vibrations[J]. Soil Dynamics and Earthquake Engineering, 2016, 82: 161-169.
[10] Mandal A, Baidya D K, Roy D. Dynamic response of the foundations resting on a two-layered soil underlain by a rigid layer[J]. Geotechnical and Geological Engineering, 2012, 30: 775-786.
[11] 王军, 蔡袁强, 符洪涛等. 新型防淤堵真空预压法室内与现场试验研究[J]. 岩石力学与工程学报, 2014, 33(6): 1257-1268.
WANG Jun, CAI Yuan-qiang, FU Hong-tao, et al. Indoor and field experiment on vacuum preloading with new anti-clogging measures [J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(6): 1257-1268.
[12] 杨先健, 徐建, 张翠红. 土-基础的振动与隔振[M]. 中国建筑工业出版社, 2013.
YANG Xian-jian, XU Jian, ZHANG Cui-hong. Vibration of soil-foundation and isolation [M]. China Architecture and Building Press, 2013.
