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Eurocode 8 Dynamic earth pressure coefficient for earthquake analysis (Mononobe-Okabe)

Description:
Calculation of the dynamic earth pressure coefficient KAE during earthquake loading according to Mononobe-Okabe method
According to:
EN 1998-5:2004 Annex E
Supported National Annexes:
No Nationally Defined Parameters (NDPs) in the calculation
All Calculations
Input
°
°
Smaller values lead to more unfavorable results. A value of δ = 0 is a typical reasonably conservative assumption
°
A vertical wall back surface corresponds to ψ = 90°. Values less than 90° correspond to wall back surface inclining forward. For sign convention see the figure below.
°
A horizontal backfill surface corresponds to β = 0. Positive values correspond to backfill surface inclining upwards away from the wall. For sign convention see the figure below.
In accordance with EN1998-5 §7.3.2.2(4)P and the National Annex
In accordance with EN1998-5 §7.3.2.2(4)P and the National Annex. Positive value corresponds to vertical earthquake acting upwards. Both directions of vertical earthquake action should be examined
Convention of angles for calculating the earth pressure coefficients
Convention of angles for calculating the earth pressure coefficients (reproduced from EN1998-5 Figure E.1)