Seism

Ai fini della valutazione dell'azione sismica il programma si adatta al tipo di normativa scelto dall'utente. E' consentito operare ai sensi del D.M. del 16 Gennaio 1996, ovvero secondo l' Ordinanza della Presidenza del Consiglio dei Ministri n. 3316, il Testo Unico, l' Eurocodice 8 o STAS 3300-10107/0-90.

La scelta di operare con il D.M. '96 impone all'utente di inserire il coefficiente sismico orizzontale Kh:

•0.1 per zona di I Categoria;

•0,07 per zona di II Categoria;

•0,04 per zona di III Categoria;

•0 per zona non sismica

Calculation of seismic movement effects is dependent on a number of parameters, that in turn are dictated or recommended by various legislative norms. This program, with Italy as country of origin includes norms native to that country as well as the Europe wide Eurocodes 8.
This latter is the more relevant for users outside Italy and will be treated here. If it is desired to consult the Italian standards, the user is referred to the Italian language help file, accessible directly by executing the file: Muri_IT.chm in the home folder for the program.

The following parameters can/should be entered or considered by the user.

Soil Category

Type A soils	Stone like formations or very rigid homogeneous soils	S=1
Type B soils	deposits of highly condensed sands or gravels or highly consistent clays	S=1.25
Type C soils	deposits of moderately condensed sands or gravels or medium consistent clays	S=1.25
Type D soils	deposits of granular, loose or slightly dense soils, or else cohesive soils of slight to medium consistency	S=1.35

Project seismic acceleration

•No seism Zone

•Zone 1 = 0.35g

•Zone 2 = 0.25g

•Zone 3 = 0.15g

•Zone 4 = 0.05g

Factor r
The recommendation for reinforced concrete walls factor r is a value of 1. Only for gravity walls or such as are deformable can this set to 2.
The factor is used in the determination of horizontal seismic coefficient.

Horizontal seismic coefficient Kh
See Theoretical notes. Used in evaluating project force in seismic condition.

Vertical seismic coefficient Kv
See Theoretical notes. Used in evaluating project force in seismic condition with sign + or – depending on a more unfavourable effect.

Seism

Seism

Stone like formations or very rigid homogeneous soils

S=1

Type B soils

deposits of highly condensed sands or gravels or highly consistent clays

S=1.25

Type C soils

deposits of moderately condensed sands or gravels or medium consistent clays

S=1.25

deposits of granular, loose or slightly dense soils, or else cohesive soils of slight to medium consistency

S=1.35