Doboku Gakkai Ronbunshu
Online ISSN : 1882-7187
Print ISSN : 0289-7806
ISSN-L : 0289-7806
A FUNDAMENTAL STUDY ON IMPACT RESPONSE OF SAND CUSHION BY DISTINCT ELEMENT METHOD
Yoshimi SonodaHiroshi SatohNobutaka IshikawaToshiaki Ohta
Author information
JOURNAL FREE ACCESS

1994 Volume 1994 Issue 483 Pages 51-60

Details
Abstract
This paper presents a computational approach for the impact response of the sand cushion under a falling rock by using distinct element method (DEM). At first, the static loading test and falling weight test for the sand cushion are performed by using a small size model. It is found that the impact load of a sand cushion can be estimated by using the spring constant of sand obtained in the static loading test. Secondly, the relation between the spring constant of sand and the fictitionus elastic modulus of a sand element in DEM is found and the impact response analysis is performed by combining the DEM with Rigid Body Spring Model (RBSM). It has been confirmed that this computational approach can estimate the impact response of a sand cushion by comparing with the experimental results. Finally, the actual size impact tests have been simulated by this approach. It has been found the weight impact load is about 2 times smaller than the transmission impact load and the transmission energy factor is about 6-13% in the case of the span length of H type beam 8-12m and sand cushion 90cm.
Content from these authors
© by Japan Society of Civil Engineers
Previous article Next article
feedback
Top