﻿ 000256_Calculation of Active-earth Pressure on the Retaining wall.Case:Coulomb theory(Muller-Breslau theory),During Earthquake,Monotonous embankment surface,No cohesion.

# Calculation of Active-earth Pressure on the Retaining wall. Case:Coulomb theory(Muller-Breslau theory),During Earthquake,Monotonous embankment surface,No cohesion.

## Keyword

Okabe･Mononobe Equation,Coulomb theory,Muller-Breslau theory,Internal friction angle of soil,φ,Active-earth Pressure coefficient,Retaining wall,friction angle between soil and wall,Total earth thrust,Monotonous embankment surface,No cohesion,During Earthquake.

## Reference

・『道路土工擁壁工指針平成11年3月』（社団法人日本道路協会）
・『擁壁の設計と施工計画』（村上有誠）
・『建築物荷重指針・同解説(2004)』（社団法人日本建築学会）

## Remarks

・KAE=(cos(φ-θ0-θ))^2/(cos(θ0)*(cosθ)^2*cos(δ+θ+θ0))/(1+(sin(φ+δ)*sin(φ-α-θ0)/cos(δ+θ+θ0)/cos(θ-α))^0.5)^2).
・θ0：Seismic compound angle.tanθ0=kH/(1-kV).
・kH：Horizontal seismic coefficient.It is recommended to input the value under 0.25(=245gal/980gal).
・kV：Vertical seismic coefficient.
・α(°) should be smaller than φ(°).
・δ(°) should be smaller than φ(°).
・φ(°)：Internal friction angle of soil.
・δ(°)：Friction angle between soil and wall during earthquake.

## History

・2014/08/28：layout change.
・2009/05/09：Moved from www.am-consulting.co.jp to here.