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A Statistical Estimation Model for the Impact Force of Dry Granular Flow Against Rigid Barrier
作者姓名:ZHAO Binbin  JIANG Yuanjun
作者单位:Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China;China Electric Power Research Institute Co., Ltd., Beijing 100055, China,Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China
基金项目:This project sponsored by National Key Research and Development Program (2018YFC0809400),"Safety Guarantee Technology of Power Grid Facilities in Large Region under Extreme Conditions" and Innovation Fund of Chinese Electric Power Research Institute(5242001800CD),"Core index design and feasibility study of remote sensing satellites for power grid".
摘    要:The impact force on retaining structure, which is caused by granular flow comprised of dry particles originated from shallow landslide failure, still lacks systematic studies. In order to support the potential design requirement of structure used to resist this kind of impact, a series of dry granular impact experiments are conducted on one rigid barrier model. According to parametric analysis results, one nonlinear regression model is proposed to correlate total normal impact force at critical time (Fcr) with its influential parameters. Further, we complete a systematic statistics analysis and obtain a subsequent optimum regression equation based on the proposed model. According to experience and dimension balance, the equation is modified and finally transformed into one non-dimensional equation, which shows good agreement between predicted and observed results.

关 键 词:Granular  flow  Impact  force  Rigid  barrier
收稿时间:2019/12/13 0:00:00
修稿时间:2020/1/9 0:00:00

A Statistical Estimation Model for the Impact Force of Dry Granular Flow Against Rigid Barrier
ZHAO Binbin,JIANG Yuanjun.A Statistical Estimation Model for the Impact Force of Dry Granular Flow Against Rigid Barrier[J].Earthquake Research in China,2020,34(1):110-120.
Authors:ZHAO Binbin and JIANG Yuanjun
Institution:Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China;China Electric Power Research Institute Co., Ltd., Beijing 100055, China and Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China
Abstract:The impact force on retaining structure, which is caused by granular flow comprised of dry particles originated from shallow landslide failure, still lacks systematic studies. In order to support the potential design requirement of structure used to resist this kind of impact, a series of dry granular impact experiments are conducted on one rigid barrier model. According to parametric analysis results, one nonlinear regression model is proposed to correlate total normal impact force at critical time (Fcr) with its influential parameters. Further, we complete a systematic statistics analysis and obtain a subsequent optimum regression equation based on the proposed model. According to experience and dimension balance, the equation is modified and finally transformed into one non-dimensional equation, which shows good agreement between predicted and observed results.
Keywords:Granular flow  Impact force  Rigid barrier
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