EXAMPLE 6. BUILDING VALUATION & REDESIGN STUDY

EXAMPLE 6: "STUDY FOR THE VALUATION AND REDESIGN OF A BUILDING ACCORDING TO THE CANC. 64 This node is usually the bulkhead node of the last full floor of the building. If there is no bulkhead, choose a perimeter node from the same level. In this example, the Control Node is 63. " Number of Steps " sets the maximum number of steps (analyses) that each inelastic analysis will perform Pushover is an iterative process that is terminated, when no other limit is set, once the vector is converted to a mechanism. The number of steps is an upper maximum limit in order to avoid too many steps before the vector becomes a mechanism. The default value is 200. The "Maximum movement" option as a percentage (%) of the total height of the building is second way to set an upper limit on the number of steps before the carrier becomes a mechanism. The process stops as soon as the maximum movement of the control node exceeds the specified percentage of the building height. The default value is 3% of the total height of the building. The next parameter "Lambda range (%)" refers to the load factor λ. At each step the load factor λ is calculated for each element and the minimum value from all the structural elements determines that element at which the plastic joint will be created. With the default value of 0 in this parameter, the program selects a minimum value, i.e. only one element, even if there are values from other elements that are very close to this value. Setting a value different from 0 e.g. 10% means that those λ values that are less than or equal to the minimum value λ plus 10% will be taken into account in this step, resulting in a single step to create more than one plastic joint at a time and thus reducing the number of steps in the analysis. EXAMPLE: Suppose that in the first step of the pushover or minimum value λ is 1 and corresponds to a specific structural element on which the plastic joint will be created. By setting a value of 10% in this parameter, elements with λ values from 1 to 1.1 will also have plastic joints created in them, simultaneously with the first element. In the "Calculate constant LS shear length value" option you specify: • whether the shear length of the elements will be calculated with a fixed value based on their length in all steps as provided for in the CEQA (ticked) EPE *The calculation of stiffness according to Eq. (2) through My, θy can be based on a fixed value of Ls, as follows: − In beams connected at both ends by vertical members, Ls may be taken to be equal to half the net span of the beam. − In beams connected to a vertical member at one end only, Ls may be taken to be equal to the total net span of the beam.