private Length DetermineSignedOffset(AnalyticalWallLateral wall)
{
var wallSegment = wall.WallLine;
Point2D closestPointAlongExtensionToCenterOfRigidity =
wallSegment.ClosestPointToExtension(LateralLevel.CenterOfRigidity);
double distanceFromCenterOfRigidity =
closestPointAlongExtensionToCenterOfRigidity.DistanceTo(LateralLevel.CenterOfRigidity);
double signedDistanceFromCenterOfRigidity;
switch (wallSegment.WhichSide(LateralLevel.CenterOfRigidity))
{
case Side.Right:
signedDistanceFromCenterOfRigidity = -distanceFromCenterOfRigidity;
break;
case Side.Left:
signedDistanceFromCenterOfRigidity = distanceFromCenterOfRigidity;
break;
case Side.Colinear:
signedDistanceFromCenterOfRigidity = 0;
break;
default:
throw new InvalidEnumArgumentException();
}
return(new Length(signedDistanceFromCenterOfRigidity, LengthUnit.Inch));
}
private ShearWallPanelResponseCollection DetermineWallLoadCaseResponses(AnalyticalWallLateral wall)
{
ShearWallPanelResponseCollection loadPatternResults = Responses.WallLoadPatternResults[wall.UniqueId];
IEnumerable <ShearWallPanelResponse> loadCaseResults =
loadPatternResults.GetSuperimposedResponsesAtLoadCases(LoadCases);
return(new ShearWallPanelResponseCollection(loadCaseResults));
}
private ShearWallPanelResponseCollection DetermineWallLoadPatternResponses(AnalyticalWallLateral wall)
{
ShearWallPanelRigidAnalysisParameters wallStiffness = WallStiffnesses[wall.UniqueId];
var responses = new ShearWallPanelResponseCollection(wall.UniqueId, wall.WallLine);
foreach (LateralLevelForce force in Forces)
{
responses.Add(DetermineWallResponse(wall, wallStiffness, force));
}
return(responses);
}
private ShearWallPanelResponse DetermineWallResponse(AnalyticalWallLateral wall,
ShearWallPanelRigidAnalysisParameters wallStiffness, LateralLevelForce force)
{
Force directXShear = (Force)(wallStiffness.Kx * force.DirectX / LevelStiffness.X);
Force directYShear = (Force)(wallStiffness.Ky * force.DirectY / LevelStiffness.Y);
Vector2D directVector = new Vector2D(directXShear.Value, directYShear.Value);
var wallUnitVector = wall.WallLine.ToVector2D().Normalize();
var response = new ShearWallPanelResponse(wall.UniqueId, force.LoadPattern, wall.WallLine);
response.DirectShear = directVector.AngleTo(wallUnitVector).Degrees < 90
? new Force(directVector.Length, ForceUnit.Kip)
: new Force(-directVector.Length, ForceUnit.Kip);
response.TorsionalShear = (Force)(wallStiffness.K * wallStiffness.SignedOffsetFromCenterOfRigidity *
force.TotalT(LateralLevel.CenterOfRigidity) / LevelStiffness.J);
return(response);
}
private ShearWallPanelRigidAnalysisParameters DetermineWallStiffnessParametersSansOffset(AnalyticalWallLateral wall)
{
var wallVector = wall.WallLine.ToVector2D();
var wallAngleToXAxis = new Unitless(wallVector.SignedAngleTo(Vector2D.XAxis).Radians, UnitlessUnit.Radian);
var k = new ForcePerLength(wall.Stiffness.ConvertTo(ForcePerLengthUnit.KipPerInch), ForcePerLengthUnit.KipPerInch);
return(new ShearWallPanelRigidAnalysisParameters
{
K = k,
AngleFromWallAxisToGlobalXAxis = wallAngleToXAxis
});
}