The Effect to Structure due to SSI

Abstract:

In order to understand the soil-structure interaction, we were doing the excitation test about 1:4 scaled steel frame-raft foundation model in the soil bin. The test was through changing the stiffness of the superstructure respectively. We inputting Gaussian white noise measured vibration period, dynamic response with EL and Taft wave show the shock absorption effect of the soil. Finite element software sap2000 simulated rigid foundation on the dynamic response analysis on the steel frames. We found that there are some differences about the natural period, the upper structural stiffness greater the additional period is longer. Soil has a shock absorbing effect with the steel frame, the effect mainly come from the change of structure stiffness. Because of the soil-structure interaction, peak acceleration of the top storey is reducer when steel framework excitation on the soil bin than on rigid foundation, and peak displacement of the top storey is increased.

• Periodical: Applied Mechanics and Materials (Volume 188)
• Pages: 112-118
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.188.112
• Online since: June 2012
• Authors: Shou Ping Shang, Wan Ruo Chen, Xi La Liu
• Keywords: Additional Cycle, Excitation Test, Sap2000, Structure-Soil Interaction, Top Storey Acceleration, Top Storey Displacement, Upper Structure Stiffness

References

[1] The People's Republic of China Ministry of construction. Code for seismic design of buildings of GB 50011-2001. Beijing: China Building Industry Press, 2010.

[2] Shang Shouping, Zhou Fulin. Seismic design of structures. Beijing: Higher Education Press,2010, pp.43-46.

[3] Xiong Wei, SSI effect and a new distributed vibration isolation system ( RSM ) theory analysis and experiment study , D. Doctoral dissertation of Hunan University.(2009)

[4] Lv Xilin, Zhang Zhiying, Cao Wenqing, soil - structure interaction system composite modal damping ratio of shaking table model test , J. Mechanics. 24 (2003) 75-80

[5] Lv Xilin, Chen Yueqing. Test research of shaking table model on soil-structure interaction, J.Earthquake engineering and engineering vibration. 20 (2000) 20-29．

[6] S．K．Prasad,I．Towhata,G P．Chandradhara,E Nanjundaswamy，Shaking table tests in earthquake geotechnical engineering, J．Current science. 87 (2004) 1398一1404．

[7] Shang Shouping, He Zhiwen,et al. Experimental study on the influence of relative stiffness ratio of superstructure and foundation of soil- structure system to the fundamental frequency, J . Earthquake engineering and engineering vibration. 28 (2008) 94 – 101.

[8] Wang H L，A comparison of soil—structure interaction calculations with results of full—scale forced vibration tests, J．Soil Dynamics and Earthquake Engineering. 7 (1988) 22—31．

DOI: 10.1016/s0267-7261(88)80012-5

[9] Chen Bo, soil - pile - structure interaction system simulation and analysis ,D. Doctoral dissertation of Tongji University.(2002)

[10] Lv Xilin, Jiang Huanjun. The progress of studies on the seismic design of building structures, J.Journal of Tongji University ( NATURAL SCIENCE EDITION ). 32(10) (2004) 1278-1284.

[11] Hunan University, Taiyuan University, Fuzhou University. The experiment of building structures ,M . Beijing: China Building Industry Press. (1991) 194-195.