EXAMPLE 6. BUILDING VALUATION & REDESIGN STUDY

EXAMPLE 6: "STUDY FOR THE VALUATION AND REDESIGN OF A BUILDING ACCORDING TO THE CANC. 65 − In columns, Ls may be taken as half of the net height between beams to which the column is monolithically connected within the considered plane of bending. − In walls, Ls can be taken on each floor differently and equal to half the distance of the floor base cross-section from the top of the wall in the building. • or whether it shall be calculated at each step of the inelastic analysis on the basis of the resulting intensities, where Shear length = M/V at the end section of the element, i.e. the distance of the end section from the zero point of the moments. The parameter "Active stiffness" concerns the way of calculating the stiffnesses of the elements of the structure. CAN.EPE *7.2.3. Active stiffness of OS data The active stiffness of the element length Ls equal to: K=MyLs/3θy (2) where My and θy are the value of the moment and chord angle of twist, respectively, at the yielding of the end section of the element. The active stiffness K of the total length of the element can be taken to be equal to average of the values calculated from Eq. (2) at the two end cross-sections of the element. If these cross-sections have a non-symmetrical shape or reinforcement (i.e. different for positive or negative bending moment), the average of the values of K from Eq. (2) for the two times of bending (positive or negative). The first step of the inelastic analysis is to calculate intensive quantities from the permanent and mobile loads of the structure. The stiffnesses taken into account for these quantities are multiplied by the coefficients specified in the scenario parameters in the "Members" option. In the second step of the inelastic analysis where the seismic load is applied the program now gives three possibilities for this calculation. • Home : The rigidities of the elements will be maintained with coefficients of units in all the steps of the process. • Calculation at each step : The CAN.EPE provides at each step of the pushover a reduction of stiffness. This option recalculates at each step, regardless of whether or not a plastic joint has been created, the stiffnesses based on the stiffnesses specified in the EPC. The value of the stiffnesses to which the impairment is applied is the original value, not the impaired value applied only in the first step. • After the plastic joint : This option is the same as the previous one with the difference that the impairment takes place after the plastic joint is created. Until the step this element retains the rigidity of the first step. • Finally, in the "Data Reliability Level" option, you select the corresponding SDSs.