UnconfMander1988 Class Reference

Class that stores funcions and material properties of a RC rectangular or circular section with Mander 1988 as the material model for the unconfined reinforced concrete and the OpenSeesPy command type used to model it is Concrete04 or Concrete01. More...

Inheritance diagram for UnconfMander1988:

Public Member Functions
def	__init__ (self, int ID, fc, Ec, ec=1, ecp=1, fct=-1, et=-1, beta=0.1)
	Constructor of the class. More...
def	CheckApplicability (self)
	Implementation of the homonym abstract method. More...
def	Compute_ec (self)
	Method that computes the compressive concrete yield strain. More...
def	Compute_ecp (self)
	Method that computes the compressive concrete spalling strain. More...
def	Compute_ecu (self)
	Method that computes the compressive concrete failure strain. More...
def	Compute_et (self)
	Method that computes the tensile concrete yield strain. More...
def	Compute_fct (self)
	Method that computes the tensile concrete yield stress. More...
def	Concrete01 (self)
	Generate the material model Concrete01 for unconfined concrete using the computed parameters. More...
def	Concrete04 (self)
	Generate the material model Concrete04 for unconfined concrete (Mander 1988) using the computed parameters. More...
def	ReInit (self, ec=1, ecp=1, fct=-1, et=-1)
	Implementation of the homonym abstract method. More...
def	ShowInfo (self, plot=False, block=False, concrete04=True)
	Implementation of the homonym abstract method. More...
def	UpdateStoredData (self)
	Implementation of the homonym abstract method. More...
def	CheckApplicability (self)
	Abstract function used to check the applicability of the material model. More...

Public Attributes
	beta
	data
	Ec
	ec
	ecp
	ecu
	et
	fc
	fct
	ID
	Initialized
	section_name_tag

Detailed Description

Class that stores funcions and material properties of a RC rectangular or circular section with Mander 1988 as the material model for the unconfined reinforced concrete and the OpenSeesPy command type used to model it is Concrete04 or Concrete01.

For more information about the empirical model for the computation of the parameters, see Mander et Al. 1988, Karthik and Mander 2011 and SIA 262:2012.

Parameters

MaterialModels

Parent abstract class.

Definition at line 1117 of file MaterialModels.py.

Constructor & Destructor Documentation

__init__()

def __init__	(		self,
		int	ID,
			fc,
			Ec,
			ec = 1,
			ecp = 1,
			fct = -1,
			et = -1,
			beta = 0.1
	)

Constructor of the class.

Parameters

ID	(int): Unique material model ID.
fc	(float): Compressive concrete yield strength (needs to be negative).
Ec	(float): Young modulus.
ec	(float, optional): Compressive concrete yield strain. Defaults to 1, e.g. computed according to Karthik and Mander 2011.
ecp	(float, optional): Concrete spalling strain. Defaults to 1, e.g. computed according to Mander 1988.
fct	(float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.
et	(float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.
beta	(float, optional): Loating point value defining the exponential curve parameter to define the residual stress. Defaults to 0.1 (according to OpenSeesPy documentation)

Exceptions

NegativeValue	ID needs to be a positive integer.
PositiveValue	fc needs to be negative.
NegativeValue	Ec needs to be positive.
PositiveValue	ec needs to be negative if different from 1.
PositiveValue	ecp needs to be positive if different from 1.
NegativeValue	fct needs to be positive if different from -1.
NegativeValue	et needs to be positive if different from -1.

Reimplemented in UnconfMander1988RCCircShape, and UnconfMander1988RCRectShape.

Definition at line 1125 of file MaterialModels.py.

    def __init__(self, ID: int, fc, Ec, ec = 1, ecp = 1, fct = -1, et = -1, beta = 0.1):
        """
        Constructor of the class.
 
        @param ID (int): Unique material model ID.
        @param fc (float): Compressive concrete yield strength (needs to be negative).
        @param Ec (float): Young modulus.
        @param ec (float, optional): Compressive concrete yield strain. Defaults to 1, e.g. computed according to Karthik and Mander 2011.
        @param ecp (float, optional): Concrete spalling strain. Defaults to 1, e.g. computed according to Mander 1988.
        @param fct (float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.
        @param et (float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.
        @param beta (float, optional): Loating point value defining the exponential curve parameter to define the residual stress.
            Defaults to 0.1 (according to OpenSeesPy documentation)
 
        @exception NegativeValue: ID needs to be a positive integer.
        @exception PositiveValue: fc needs to be negative.
        @exception NegativeValue: Ec needs to be positive.
        @exception PositiveValue: ec needs to be negative if different from 1.
        @exception PositiveValue: ecp needs to be positive if different from 1.
        @exception NegativeValue: fct needs to be positive if different from -1.
        @exception NegativeValue: et needs to be positive if different from -1.
        """
        # Check
        if ID < 0: raise NegativeValue()
        if fc > 0: raise PositiveValue()
        if Ec < 0: raise NegativeValue()
        if ec != 1 and ec > 0: raise PositiveValue()
        if ecp != 1 and ecp > 0: raise PositiveValue()
        if fct != -1 and fct < 0: raise NegativeValue()
        if et != -1 and et < 0: raise NegativeValue()
 
        # Arguments
        self.ID = ID
        self.fc = fc
        self.Ec = Ec
        self.beta = beta
 
        # Initialized the parameters that are dependent from others
        self.section_name_tag = "None"
        self.Initialized = False
        self.ReInit(ec, ecp, fct, et)
 

Member Function Documentation

CheckApplicability()

def CheckApplicability

(

self

)

Implementation of the homonym abstract method.

See parent class MaterialModels for detailed information.

Reimplemented from MaterialModels.

Definition at line 1242 of file MaterialModels.py.

    def CheckApplicability(self):
        """
        Implementation of the homonym abstract method.
        See parent class MaterialModels for detailed information.
        """
        Check = True
        if self.fc < -110*MPa_unit: # Deierlein 1999
            Check = False
            print("With High Strength concrete (< -110 MPa), a better material model should be used (see Abdesselam et Al. 2019")
        if not Check:
            print("The validity of the equations is not fullfilled.")
            print("!!!!!!! WARNING !!!!!!! Check material model of Unconfined Mander 1988, ID=", self.ID)
            print("")
 
 

Compute_ec()

def Compute_ec

(

self

)

Method that computes the compressive concrete yield strain.

For more information, see Karthik and Mander 2011.

Returns

float: Strain

Definition at line 1257 of file MaterialModels.py.

    def Compute_ec(self):
        """
        Method that computes the compressive concrete yield strain.
        For more information, see Karthik and Mander 2011.
 
        @returns float: Strain
        """
        # return -0.002 # Alternative: Mander et Al. 1988
        return -0.0015 + self.fc/MPa_unit/70000 # Karthik Mander 2011
 

Compute_ecp()

def Compute_ecp

(

self

)

Method that computes the compressive concrete spalling strain.

For more information, see Mander et Al. 1988.

Returns

float: Strain

Definition at line 1267 of file MaterialModels.py.

    def Compute_ecp(self):
        """
        Method that computes the compressive concrete spalling strain.
        For more information, see Mander et Al. 1988.
 
        @returns float: Strain
        """
        return 2.0*self.ec
 
 

Compute_ecu()

def Compute_ecu

(

self

)

Method that computes the compressive concrete failure strain.

For more information, see Karthik and Mander 2011.

Returns

float: Strain

Definition at line 1297 of file MaterialModels.py.

    def Compute_ecu(self):
        """
        Method that computes the compressive concrete failure strain.
        For more information, see Karthik and Mander 2011.
 
        @returns float: Strain
        """
        # return -0.004 # Alternative: Mander et Al. 1988
        return -0.012 - 0.0001 * self.fc/MPa_unit # Karthik Mander 2011
 

Compute_et()

def Compute_et

(

self

)

Method that computes the tensile concrete yield strain.

For more information, see Mander et Al. 1988 (eq 45).

Returns

float: Strain.

Definition at line 1287 of file MaterialModels.py.

    def Compute_et(self):
        """
        Method that computes the tensile concrete yield strain.
        For more information, see Mander et Al. 1988 (eq 45).
 
        @returns float: Strain.
        """
        return self.fct/self.Ec
 
 

Compute_fct()

def Compute_fct

(

self

)

Method that computes the tensile concrete yield stress.

For more information, see SIA 262:2012.

Returns

float: Stress.

Definition at line 1277 of file MaterialModels.py.

    def Compute_fct(self):
        """
        Method that computes the tensile concrete yield stress.
        For more information, see SIA 262:2012.
 
        @returns float: Stress.
        """
        return 0.30 * math.pow(-self.fc/MPa_unit, 2/3) * MPa_unit
 
 

Concrete01()

def Concrete01

(

self

)

Generate the material model Concrete01 for unconfined concrete using the computed parameters.

See _Concrete01 function for more information. Use this method or Concrete04, not both (only one material model for ID).

Definition at line 1307 of file MaterialModels.py.

    def Concrete01(self):
        """
        Generate the material model Concrete01 for unconfined concrete using the computed parameters.
        See _Concrete01 function for more information. Use this method or Concrete04, not both (only one material model for ID).
        """
        _Concrete01(self.ID, self.ec, self.fc, self.ecu)
        self.Initialized = True
        self.UpdateStoredData()
 
 

Concrete04()

def Concrete04

(

self

)

Generate the material model Concrete04 for unconfined concrete (Mander 1988) using the computed parameters.

See _Concrete04 function for more information. Use this method or Concrete01, not both (only one material model for ID).

Definition at line 1317 of file MaterialModels.py.

    def Concrete04(self):
        """
        Generate the material model Concrete04 for unconfined concrete (Mander 1988) using the computed parameters.
        See _Concrete04 function for more information. Use this method or Concrete01, not both (only one material model for ID).
        """
        _Concrete04(self.ID, self.fc, self.ec, self.ecu, self.Ec, self.fct, self.et, self.beta)
        self.Initialized = True
        self.UpdateStoredData()
 
 

ReInit()

def ReInit	(		self,
			ec = 1,
			ecp = 1,
			fct = -1,
			et = -1
	)

Implementation of the homonym abstract method.

See parent class DataManagement for detailed information.

Parameters

ec	(float, optional): Compressive concrete yield strain. Defaults to 1, e.g. computed according to Karthik and Mander 2011.
ecp	(float, optional): Concrete spalling strain. Defaults to 1, e.g. computed according to Mander 1988.
fct	(float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.
et	(float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.

Definition at line 1168 of file MaterialModels.py.

    def ReInit(self, ec = 1, ecp = 1, fct = -1, et = -1):
        """
        Implementation of the homonym abstract method.
        See parent class DataManagement for detailed information.
 
        @param ec (float, optional): Compressive concrete yield strain. Defaults to 1, e.g. computed according to Karthik and Mander 2011.
        @param ecp (float, optional): Concrete spalling strain. Defaults to 1, e.g. computed according to Mander 1988.
        @param fct (float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.
        @param et (float, optional): Tensile concrete yield strain. Defaults to -1, e.g. computed according to SIA 262:2012.
        """
        # Check applicability
        self.CheckApplicability()
 
        # Arguments
        self.ec = self.Compute_ec() if ec == 1 else ec
        self.ecp = self.Compute_ecp() if ecp == 1 else ecp
        self.fct = self.Compute_fct() if fct == -1 else fct
        self.et = self.Compute_et() if et == -1 else et
 
        # Members
        self.ecu = self.Compute_ecu()
        if self.section_name_tag != "None": self.section_name_tag = self.section_name_tag + " (modified)"
 
        # Data storage for loading/saving
        self.UpdateStoredData()
 
 

ShowInfo()

def ShowInfo	(		self,
			plot = False,
			block = False,
			concrete04 = True
	)

Implementation of the homonym abstract method.

See parent class DataManagement for detailed information.

Parameters

plot	(bool, optional): Option to show the plot of the material model. Defaults to False.
block	(bool, optional): Option to wait the user command 'plt.show()' (avoiding the stop of the program everytime that a plot should pop up). Defaults to False.
concrete04	(bool, optional): Option to show in the plot the concrete04 or concrete01 if False. Defaults to True.

Definition at line 1214 of file MaterialModels.py.

    def ShowInfo(self, plot = False, block = False, concrete04 = True):
        """
        Implementation of the homonym abstract method.
        See parent class DataManagement for detailed information.
        
        @param plot (bool, optional): Option to show the plot of the material model. Defaults to False.
        @param block (bool, optional): Option to wait the user command 'plt.show()' (avoiding the stop of the program everytime that a plot should pop up). Defaults to False.
        @param concrete04 (bool, optional): Option to show in the plot the concrete04 or concrete01 if False. Defaults to True.
        """
        print("")
        print("Requested info for Unconfined Mander 1988 material model Parameters, ID = {}".format(self.ID))
        print("Section associated: {} ".format(self.section_name_tag))
        print('Concrete strength fc = {} MPa'.format(self.fc/MPa_unit))
        print('Strain at maximal strength ec = {}'.format(self.ec))
        print('Maximal strain ecu = {}'.format(self.ecu))
        print("")
 
        if plot:
            fig, ax = plt.subplots()
            if concrete04:
                PlotConcrete04(self.fc, self.Ec, self.ec, self.ecu, "U", ax, self.ID)
            else:
                PlotConcrete01(self.fc, self.ec, 0, self.ecu, ax, self.ID)
 
            if block:
                plt.show()
 
 

UpdateStoredData()

def UpdateStoredData

(

self

)

Implementation of the homonym abstract method.

See parent class DataManagement for detailed information.

Definition at line 1195 of file MaterialModels.py.

    def UpdateStoredData(self):
        """
        Implementation of the homonym abstract method.
        See parent class DataManagement for detailed information.
        """
        self.data = [["INFO_TYPE", "UnconfMander1988"], # Tag for differentiating different data
            ["ID", self.ID],
            ["section_name_tag", self.section_name_tag],
            ["fc", self.fc],
            ["Ec", self.Ec],
            ["ec", self.ec],
            ["ecp", self.ecp],
            ["ecu", self.ecu],
            ["fct", self.fct],
            ["et", self.et],
            ["beta", self.beta],
            ["Initialized", self.Initialized]]
 
 

Member Data Documentation

beta

beta

Definition at line 1160 of file MaterialModels.py.

data

data

Definition at line 1200 of file MaterialModels.py.

Ec

Ec

Definition at line 1159 of file MaterialModels.py.

ec

ec

Definition at line 1182 of file MaterialModels.py.

ecp

ecp

Definition at line 1183 of file MaterialModels.py.

ecu

ecu

Definition at line 1188 of file MaterialModels.py.

et

et

Definition at line 1185 of file MaterialModels.py.

fc

fc

Definition at line 1158 of file MaterialModels.py.

fct

fct

Definition at line 1184 of file MaterialModels.py.

ID

ID

Definition at line 1157 of file MaterialModels.py.

Initialized

Initialized

Definition at line 1164 of file MaterialModels.py.

section_name_tag

section_name_tag

Definition at line 1163 of file MaterialModels.py.

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The documentation for this class was generated from the following file:

• /media/carmine/DATA/Programmi/OpenSeesPyAssistant/MaterialModels.py