def from_yaml_file(cls, filePath):
## Read in yaml file as a dictionary
with open(filePath, 'r') as stream:
try:
data = yaml.safe_load(stream)
except yaml.YAMLError as exc:
print(exc)
## Initialize structure
xsection = xs.generalSection(**data['XSection'])
material = ma.Custom(**data['Material'])
s1 = cls(cross=xsection, material=material)
## Add nodes
nodeMap = {} # map nodes to indicies
for i, node in enumerate(data['Nodes']):
for key, value in node.items():
try:
s1.addNode(value['x'], value['y'], fixity=value['fixity'])
except KeyError:
s1.addNode(value['x'], value['y'])
nodeMap.update({key: i})
## Add members
for member in data['Members']:
for key, value in member.items():
SN, EN = key.split(',')
s1.addMember(nodeMap[SN], nodeMap[EN], expectedaxial=value['axial'])
return s1
def test_knownframe(self):
xs1 = xs.generalSection(A=1, Ix=1)
s1 = sc.Structure(xs1, ma.Steel(E=144))
s1.addNode(0, 0, fixity='fixed')
s1.addNode(24, 0, fixity='roller')
s1.addNode(42, 0, fixity='roller')
s1.addMember(0, 1)
s1.addMember(2, 1)
def __init__(self, SN, EN, material=ma.Steel(), cross=xs.generalSection()):
self.cross = cross
self.material = material
# assign start and end node properties
self.SN = SN
self.EN = EN
#the axial force
self.axial = 0
def test_basic():
xs1 = xs.generalSection(A=1, Ix=1)
ma1 = ma.Custom(E=29000)
f1 = Frame.Frame(cross=xs1, material=ma1)
f1.addNode(0, 0, fixity='fixed')
f1.addNode(10, 0)
f1.addMember(0, 1)
assert isSymmetric(f1.K)
assert isSymmetric(f1.members[0].k)
assert (f1.K == f1.members[0].k).all()
assert (f1.K == f1.members[0].kglobal).all()
def test_Frame(self):
# global stiffness matrix must be symmetric
xs1 = xs.generalSection(A=30, Ix=700)
s1 = sc.Structure(xs1, ma.Steel(E=29000))
s1.addNode(0, 0)
s1.addNode(0, 144)
s1.addNode(144, 144)
s1.addMember(0, 1)
s1.addMember(1, 2)
m1 = s1.members[0]
stiff1 = m1.T.T * m1.kframe * m1.T
v = np.all(stiff1 == stiff1.T)
self.assertEqual(v, True)
def test_Truss(self): xs1 = xs.generalSection(A=1.2) ma1 = ma.Custom(E=30*10**6, fy=60) #psi # Example 6.2.4 T1 = Truss.Truss(cross=xs1,material=ma1) # Make nodes n1 = T1.addNode(0,-180) n2 = T1.addNode(0,0) n3 = T1.addNode(120,0,fixity='pin') n4 = T1.addNode(120,-180,fixity='wallslider') m1 = T1.addMember(0,3) m2 = T1.addMember(1,2) m3 = T1.addMember(1,0) m4 = T1.addMember(2,3) m5 = T1.addMember(0,2) m6 = T1.addMember(1,3) length = math.sqrt(120**2+180**2) self.assertEqual(m1.length, 120) self.assertEqual(m2.length, 120) self.assertEqual(m3.length, 180) self.assertEqual(m4.length, 180) self.assertEqual(m5.length, length) self.assertEqual(m6.length, length) self.assertEqual(m1.unVec[0],1) self.assertEqual(m1.unVec[1],0) loading = np.array([0,0,0,-4000,0,0,0,0]) T1.directStiffness(loading) self.assertAlmostEqual(m1.axial[0,0],1333 + 1/3) self.assertAlmostEqual(m2.axial[0,0], - 1333 - 1/3) self.assertAlmostEqual(m3.axial[0,0], 2000) self.assertAlmostEqual(m4.axial[0,0], -2000) self.assertAlmostEqual(m5.axial[0,0], -2403.7008503093257) self.assertAlmostEqual(m6.axial[0,0], 2403.7008503093257)
def test_6_2_5():
"""
Continuous Beam (Rajan, pg. 369)
"""
xs1 = xs.generalSection(A=0.01, Ix=0.0001)
ma1 = ma.Custom(E=2 * 10**11)
f1 = Frame.Frame(cross=xs1, material=ma1)
# Nodes
f1.addNode(0, 0, fixity='fixed')
f1.addNode(2, 0, fixity='roller')
f1.addNode(5, 0, fixity='roller')
# Members
f1.addMember(0, 1)
f1.addMember(1, 2)
# node, x, y, theta
# 0
# 1
loading = np.array([
0, -2000, -666.6666667, 0, -5000, -833.3333333333333333333333333, 0,
-3000, 1500
])
f1.directStiffness(loading)
handCalc = 10**7 * np.array([[166.7, 0, -66.7, 0], [0, 6.67, 0, 1.33],
[-66.7, 0, 66.7, 0], [0, 1.33, 0, 2.67]])
assert isSymmetric(f1.K)
assert np.allclose(f1.reducedK, handCalc, 0.01)
assert f1.nodes[1].deformation_dict['x'] == 0
assert approx(f1.nodes[2].deformation_dict['θz'],
0.01) == 6.92851 * 10**(-5)
assert approx(f1.nodes[1].deformation_dict['θz'],
0.01) == -2.63092 * 10**(-5)
import StructPy.cross_sections as xs
import StructPy.structural_classes as sc
import StructPy.materials as ma
import StructPy.Truss as Truss
# Define material
A992 = ma.A992()
# Define cross section
xs1 = xs.generalSection(A=1)
# define blank structure
# the cross section and material are defaults for the members
# we will add to this later
s1 = Truss.Truss(cross=xs1, material=A992)
# Add nodes to the structure
s1.addNode(0, 0, fixity='pin')
s1.addNode(1, 1)
s1.addNode(2, 0, fixity='roller')
# Add members to the structure
s1.addMember(0, 1)
s1.addMember(1, 2)
s1.addMember(0, 2)
s1.plot()
Forces = np.matrix('0; 0; 1000; 1000; 0; 0')
disp = s1.directStiffness(Forces)
s1.plotDeformation(nfig=1, mag=1)
member.axial = member.axialstiff * np.matrix(
[l, m, -l, -m]) * np.asmatrix(d[ind]).T
return d
import structural_classes as sc
import cross_sections as xs
import materials as ma
import Truss
# Define material
A992 = ma.Steel(E=2e11)
# Define cross section
xs1 = xs.generalSection(A=1e-2, Ix=5e-6)
# define blank structure
# the cross section and material are defaults for the members
# we will add to this later
s1 = Frame(cross=xs1, material=A992)
# Add nodes to the structure
s1.addNode(0, 0, xfix=0, yfix=0, fixity='pin')
s1.addNode(0, 2)
s1.addNode(1.5, 3)
s1.addNode(3, 2)
s1.addNode(3, 0, xfix=0, yfix=0, fixity='pin')
# Add members to the structure
s1.addMember(0, 1)
import StructPy.cross_sections as xs
import StructPy.structural_classes as sc
import StructPy.materials as ma
xs1 = xs.generalSection(A=30, Ix=700)
s1 = sc.Structure(xs1, ma.Steel(E=29000))
s1.addNode(0, 0)
s1.addNode(0, 144)
s1.addNode(144, 144)
s1.addMember(0, 1)
s1.addMember(1, 2)
m1 = s1.members[0]
stiff1 = m1.T.T * m1.kframe * m1.T
s1.plot()
xs1 = xs.AISC('W8X48').printProperties()
