Seismic Response Analysis of Silo-Stock-Foundation Interaction System

Source:
By:Shuwei Li, Wen Zhao, Zhiyu Guo

DOI: https://doi.org/10.30564/frae.v1i2.46

Abstract: To analyze the response law of silo-stock-foundation interaction system under seismic load, a dynamic equation of this interaction system was established. Furthermore, the dynamic characteristics of the silo-stock- oundation interaction system under different storage conditions were studied through numerical analysis. The displacement at the silo top was much greater than that at the silo bottom, while the vibration trend of the upper and lower silos on the same bus bar was similar. The acceleration response, displacement and stress response of the structure increased with the increase of the input seismic wave. Furthermore, the direction time responses of several typical silo parts were consistent. With increase in storage material, the acceleration peak of the silo and bulk material increased and then decreased. This indicates that the relative motion of the storage material and silo had a damping effect on the silo system. The maximum circumferential strain and equivalent stress of silos with different storage capacities were recorded at the variable section of silos (the top of funnel). The effective stress beneath foundations near silos was obviously higher than that far away from silos. These results can provide a reliable theoretical basis and reference values for mitigating silo structural failures under seismic load.

References:

[1] Yingwen Che. Research on the Stress Situation and Stability of Silo[D].Wuhan University of Technology,2011. (in Chinese) [2] Huachao Ding. Study on Mechanical Performance Analysis and Design Optimization of Viaduct Silo[D].Zhengzhou University,2016. (in Chinese) [3] Jinsuo Gao. Analysis of Floor Type Steel Silo Earthquake[D].Xi'an University Of Architecture And Technoloy,2009. (in Chinese) [4] Yichen Gao, Guozhi Qiu. The Storage of Material Parameters on Horizontal Earthquake Effect of Silo[J].Science Technology and Engineering, 2017, 17(01): 79–84. (in Chinese) [5] Kunpeng Guo. Distribution Mechanism of Silo Storage Pressure and Seismic Vulnerability Study[D]. Beijing Jiaotong University,2016. (in Chinese) [6] Chao Ma. Silo Structure-Dynamic Calculation of Foundation Iinteraction[D]. Chang'an University, 2008. (in Chinese) [7] Jianping Wang, Yi Huang. The Present Situation and Prospect of the Aseismic Study of the Silo Structure in China[J].Industrial Construction, 2005,(04): 79-81+90. (in Chinese) [8] Mingping Wang, Yuchuan Li, Wei Liu. Calculation of the Vibration Period and Seismic Action of a Silo with a Barn[J].Journal of Vibration and Shock, 2007, (08): 5-8+165. (in Chinese) [9] Guansheng Yin. Static and Dynamic Study of Silo Structure Considering Structure Foundation Interaction[D].Xi'an University Of Architecture and Technology,2002. (in Chinese) [10] Yang Yu. Seismic Response Analysis of Reinforced Concrete Cylindrical Silo Wall Structure[D].Xi'an University of Science and Technology,2012. (in Chinese) [11] Longfei Yuan, Xiaowen Li, Guoliang Bai, et al. Seismic Response Analysis of Prestressed Concrete Round Coal Silo[J].World Earthquake Engineering, 2012, 28 (01): 81-86. (in Chinese) [12] Lujian Zhang. Experimental Research on Seismic Shaking Table Simulation of Cylinder Bearing Type Vertical Cylinder Group Structure Model[D].Henan University of Technology, 2010. (in Chinese)