CDM Dolmen

The 'Guidelines for the seismic risk classification of buildings' have been published, which will enable the so-called 'Sisma bonus' to be activated.‎ With a view to encouraging the improvement of Italy's building heritage, a tax deduction is envisaged for those interventions that reduce the seismic risk of a building.‎ The designer must therefore certify the beneficial effect of the planned intervention, an additional task that DOLMEN tries to make less burdensome.‎ In DOLMEN there is a NEW chapter dedicated to the seismic risk classification of buildings required to have access to the "Sisma bonus".‎ This function allows the building to be classified using either the simplified or the conventional method indicated by the Guidelines published by the Ministry.‎ With regard to the conventional method, the building is modelled in the 3D CAD Structure and the seismic demand scenario is saved.‎ It is probable that the seismic demand scenario required by the standard is not withstood by the construction under consideration, so it is necessary to lower the nominal life until a configuration that the structure can withstand is obtained; at this point the pre-intervention scenario is saved.‎ If the construction is verified for a seismic action with TR of less than 10 years or is not verified, it is indicated that the structure is not verifiable and the risk class G is assigned, otherwise the risk class is evaluated.‎ At this point the structure is modified in order to schematise the intervention and once the desired situation has been reached, the post-intervention scenario is saved from which the calculation of the new risk class is carried out.‎ DOLMEN allows a report to be drawn up that contains a theoretical introduction, a report of the calculated parameters and the asseveration defined in Annex B of the Guidelines, already completed.‎ Free for DOLMEN users.‎ DOLMEN allows you to apply the simplified method.‎ The programme presents a table similar to the one in the Guidelines and, depending on the structural type chosen, enables the selection of a single group of local mechanisms with their respective peculiarities; if nothing is selected, the pre-intervention vulnerability class is not lowered.‎ We then move on to the possible local interventions to improve the building's vulnerability; the choice depends on the options selected previously.‎ The results of the classification are then displayed and, again, a report is generated consisting of a theoretical introduction and the completed certificate with all the data and parameters obtained.‎