Non-linear dynamic analysis of a safety wall

Abstract:

Nowadays gases are in general preferably stored in liquid form at atmospheric pressure. Therefore gases are cooled to their boiling point, which for most gases is below 0°C. For safety reasons a double-walled tank is normally used for the bulk storage of large quantities of L.N.G. Such a tank comprises an inner tank made of nickel steel and an outer wall constructed of prestressed concrete. This paper describes a finite element analysis of the concrete outer wall which is loaded by a pressure wave which results from a gas cloud explosion at some distance of the wall. The dynamic analysis is done in two ways. First, for linear-elastic material behaviour. Second, for non-linear material behaviour duo to cracking and/or plasticity. The results are compared and discussed in detail. In both approaches we can speak of a real dynamic analysis. In some situations a complex exact dynamic analysis is not yet needed. It can be sufficient in a design phase to accept a simple approximation with less demand on time and money. Another reason for a simpler computation is the validation of the results of a complex exact dynamic analysis. The more complex the analysis, the higher the risk for errors. It then is of great value if the order of magnitude can be estimated in an independent parallel way, therefore much attention has been paid to an approximate analysis. The results are compared with the computed results.

Año de publicación:

1995

Keywords:

Fuente:

scopus