Method addLoad

SRC/element/componentElement/ComponentElement2d.cpp:676–738

}

int 
ComponentElement2d::addLoad(ElementalLoad *theLoad, double loadFactor)
{
  int type;
  const Vector &data = theLoad->getData(type, loadFactor);
  double L = theCoordTransf->getInitialLength();

  if (type == LOAD_TAG_Beam2dUniformLoad) {
    double wt = data(0)*loadFactor;  // Transverse (+ve upward)
    double wa = data(1)*loadFactor;  // Axial (+ve from node I to J)

    double V = 0.5*wt*L;
    double M = V*L/6.0; // wt*L*L/12
    double P = wa*L;

    // Reactions in basic system
    p0[0] -= P;
    p0[1] -= V;
    p0[2] -= V;

    // Fixed end forces in basic system
    q0[0] -= 0.5*P;
    q0[1] -= M;
    q0[2] += M;
  }

  else if (type == LOAD_TAG_Beam2dPointLoad) {
    double P = data(0)*loadFactor;
    double N = data(1)*loadFactor;
    double aOverL = data(2);

    if (aOverL < 0.0 || aOverL > 1.0)
      return 0;

    double a = aOverL*L;
    double b = L-a;

    // Reactions in basic system
    p0[0] -= N;
    double V1 = P*(1.0-aOverL);
    double V2 = P*aOverL;
    p0[1] -= V1;
    p0[2] -= V2;

    double L2 = 1.0/(L*L);
    double a2 = a*a;
    double b2 = b*b;

    // Fixed end forces in basic system
    q0[0] -= N*aOverL;
    double M1 = -a * b2 * P * L2;
    double M2 = a2 * b * P * L2;
    q0[1] += M1;
    q0[2] += M2;
  }
  
  else {
    opserr << "ComponentElement2d::addLoad()  -- load type unknown for element with tag: " << this->getTag() << endln;