from o3seespy.command.element.base_element import ElementBase
[docs]class StdBrick(ElementBase):
"""
The StdBrick Element Class
This element is used to construct an eight-node brick element object, which uses a trilinear isoparametric
formulation.
"""
op_type = 'stdBrick'
def __init__(self, osi, ele_nodes, mat, b1, b2, b3):
"""
Initial method for StdBrick
Parameters
----------
osi: o3seespy.OpenSeesInstance
ele_nodes: list
A list of eight element nodes in bottom and top faces and in counter-clockwise order
mat: obj
Object of ndmaterial
b1: float
Body forces in global x,y,z directions
b2: float
Body forces in global x,y,z directions
b3: float
Body forces in global x,y,z directions
Examples
--------
>>> import o3seespy as o3
>>> osi = o3.OpenSeesInstance(ndm=3)
>>> coords = [[0, 0, 0], [1, 0, 0], [1, 1, 0], [0, 1, 0], [0, 0, 1], [1, 0, 1], [1, 1, 1], [0, 1, 1]]
>>> ele_nodes = [o3.node.Node(osi, *coords[x]) for x in range(len(coords))]
>>> mat = o3.nd_material.ElasticIsotropic(osi, 1, 0.45)
>>> o3.element.StdBrick(osi, ele_nodes=ele_nodes, mat=mat, b1=1.0, b2=1.0, b3=1.0)
"""
self.osi = osi
self.ele_node_tags = [x.tag for x in ele_nodes]
self.ele_nodes = ele_nodes
self.mat = mat
self.b1 = float(b1)
self.b2 = float(b2)
self.b3 = float(b3)
osi.n_ele += 1
self._tag = osi.n_ele
self._parameters = [self.op_type, self._tag, *self.ele_node_tags, self.mat.tag, self.b1, self.b2, self.b3]
self.to_process(osi)
[docs]class BbarBrick(ElementBase):
"""
The BbarBrick Element Class
This command is used to construct an eight-node mixed volume/pressure brick element object, which uses a trilinear
isoparametric formulation.
"""
op_type = 'bbarBrick'
def __init__(self, osi, ele_nodes, mat, b1, b2, b3):
"""
Initial method for BbarBrick
Parameters
----------
osi: o3seespy.OpenSeesInstance
ele_nodes: list
A list of eight element nodes in bottom and top faces and in counter-clockwise order
mat: obj
Object of ndmaterial
b1: float
Body forces in global x,y,z directions (defined as a load, not as an accel, see o3seespy-examples)
b2: float
Body forces in global x,y,z directions
b3: float
Body forces in global x,y,z directions
Examples
--------
>>> import o3seespy as o3
>>> osi = o3.OpenSeesInstance(ndm=3)
>>> coords = [[0, 0, 0], [1, 0, 0], [1, 1, 0], [0, 1, 0], [0, 0, 1], [1, 0, 1], [1, 1, 1], [0, 1, 1]]
>>> ele_nodes = [o3.node.Node(osi, *coords[x]) for x in range(len(coords))]
>>> mat = o3.nd_material.ElasticIsotropic(osi, 1, 0.45)
>>> o3.element.BbarBrick(osi, ele_nodes=ele_nodes, mat=mat, b1=1.0, b2=1.0, b3=1.0)
"""
self.osi = osi
self.ele_node_tags = [x.tag for x in ele_nodes]
self.ele_nodes = ele_nodes
self.mat = mat
self.b1 = float(b1)
self.b2 = float(b2)
self.b3 = float(b3)
osi.n_ele += 1
self._tag = osi.n_ele
self._parameters = [self.op_type, self._tag, *self.ele_node_tags, self.mat.tag, self.b1, self.b2, self.b3]
self.to_process(osi)
[docs]class N20NodeBrick(ElementBase):
"""
The N20NodeBrick Element Class
The element is used to construct a twenty-node three dimensional element object
"""
op_type = '20NodeBrick'
def __init__(self, osi, ele_nodes, mat, bf1, bf2, bf3, mass_den):
"""
Initial method for N20NodeBrick
Parameters
----------
osi: o3seespy.OpenSeesInstance
ele_nodes: list
A list of twenty element nodes, input order is shown in notes below
mat: obj
Material object associated with previsouly-defined ndmaterial object
bf1: float
Body force in the direction of global coordinates x, y and z
bf2: float
Body force in the direction of global coordinates x, y and z
bf3: float
Body force in the direction of global coordinates x, y and z
mass_den: float
Mass density (mass/volume)
Examples
--------
>>> import o3seespy as o3
>>> # Example is currently not working
>>> osi = o3.OpenSeesInstance(ndm=3, ndf=6)
>>> coords = [[0, 0, 0], [-1, 0, 0], [-1, -1, 0], [0, -1, 0],
>>> [0, 0, -1], [-1, 0, -1], [-1, -1, -1], [0, -1, -1],
>>> [-0.5, 0, 0], [-1, -0.5, 0], [-0.5, -1, 0], [0, -0.5, 0],
>>> [-0.5, 0, -1], [-1, -0.5, -1], [-0.5, -1, -1], [0, -0.5, -1],
>>> [0, 0, -0.5], [-1, 0, -0.5], [-1, -1, -0.5], [0, -1, -0.5],
>>> ]
>>> ele_nodes = [o3.node.Node(osi, *coords[x]) for x in range(len(coords))]
>>> mat = o3.nd_material.ElasticIsotropic(osi, 1, 0.45)
>>> o3.element.N20NodeBrick(osi, ele_nodes=ele_nodes, mat=mat, bf1=1.0, bf2=1.0, bf3=1.0, mass_den=1.0)
"""
self.osi = osi
self.ele_node_tags = [x.tag for x in ele_nodes]
self.ele_nodes = ele_nodes
self.mat = mat
self.bf1 = float(bf1)
self.bf2 = float(bf2)
self.bf3 = float(bf3)
self.mass_den = float(mass_den)
osi.n_ele += 1
self._tag = osi.n_ele
self._parameters = [self.op_type, self._tag, *self.ele_node_tags, self.mat.tag, self.bf1, self.bf2, self.bf3, self.mass_den]
self.to_process(osi)
[docs]class SSPbrick(ElementBase):
"""
The SSPbrick Element Class
This command is used to construct a SSPbrick element object.
"""
op_type = 'SSPbrick'
def __init__(self, osi, ele_nodes, mat, b1, b2, b3):
"""
Initial method for SSPbrick
Parameters
----------
osi: o3seespy.OpenSeesInstance
ele_nodes: list
A list of eight element nodes in bottom and top faces and in counter-clockwise order
mat: obj
Unique integer object associated with previously-defined ndmaterial object
b1: float
Constant body forces in global x-, y-, and z-directions, respectively (optional, default = 0.0)
b2: float
Constant body forces in global x-, y-, and z-directions, respectively (optional, default = 0.0)
b3: float
Constant body forces in global x-, y-, and z-directions, respectively (optional, default = 0.0)
Examples
--------
>>> import o3seespy as o3
>>> osi = o3.OpenSeesInstance(ndm=3)
>>> coords = [[0, 0, 0], [1, 0, 0], [1, 1, 0], [0, 1, 0], [0, 0, 1], [1, 0, 1], [1, 1, 1], [0, 1, 1]]
>>> ele_nodes = [o3.node.Node(osi, *coords[x]) for x in range(len(coords))]
>>> mat = o3.nd_material.ElasticIsotropic(osi, 1, 0.45)
>>> o3.element.SSPbrick(osi, ele_nodes=ele_nodes, mat=mat, b1=1.0, b2=1.0, b3=1.0)
"""
self.osi = osi
self.ele_node_tags = [x.tag for x in ele_nodes]
self.ele_nodes = ele_nodes
self.mat = mat
self.b1 = float(b1)
self.b2 = float(b2)
self.b3 = float(b3)
osi.n_ele += 1
self._tag = osi.n_ele
self._parameters = [self.op_type, self._tag, *self.ele_node_tags, self.mat.tag, self.b1, self.b2, self.b3]
self.to_process(osi)