Plataforma Digital para Integração da Avaliação Sísmica Estrutural e Reforço de Edifícios Tradicionais em Alvenaria

Although numerical analysis and seismic assessment of masonry buildings have evolved over the last years, some open issues deserving additional research are identified, mainly concerning the: (1) capability of simplified numerical approaches for numerical simulation of existing masonry components and buildings [1-2]; (2) consistency between static and dynamic approaches and obtainment of reliable capacity curves from nonlinear static (pushover) analysis, namely with the application of representative load patterns and definition of limit states to consider and at which level they should be defined: [3]; (3) influence of the structural irregularity of masonry buildings, particularly in masonry aggregates, on effectiveness of pushover analysis and seismic performance assessment [3]; (4) uncertainty on the materials and geometrical properties, which can influence significantly the seismic vulnerability of traditional buildings [4]. In terms of using building information models for existing masonry buildings (HBIM) there are still also important open issues: (1) lack of standardization; (2) insufficient interoperability and inherent complexity of the information, which requires further research [5]. Indeed, it is essential to balance the geometric and other features of the model, such as the level of detail accuracy and the quantity of linked information. In addition, it is possible to improve interoperability of information through specific provisions of export/import definitions for Industry Foundation Classes (IFC). Therefore, the present research program intends to address topics that are not fully solved and deserved more investigation, namely: (1) achievement of a deeper insight on the seismic analysis of traditional masonry buildings with geometrical complexities which are characteristic of city centers, towards the proposal of the more efficient strengthening solutions; (2) establishment of a digital platform that integrates structural seismic analysis and strengthening of existing masonry buildings. In detail, the main objectives of the project are: (1) development of a database with information about geometrical building typologies, materials and assignment of mechanical properties; (2) evaluation of the suitability of the pushover analysis of existing masonry buildings with geometrical irregularities, particularly masonry aggregates and further study of strengthening solutions; (3) assessment of the influence of material and geometric uncertainties (connection among structural elements) in the seismic performance of masonry buildings; (4) development of a digital platform based on building information modelling concepts that integrates geometrical modelling, materials, mechanical properties and building condition state, as well as results of seismic analysis and strengthening strategies. The research objectives are considered to be of utmost scientific interest, relevance, being beyond the state of the art by providing; (1) a database on mechanical material properties of traditional masonry buildings; (2) most appropriate simplified numerical approach and performance based assessment approach for irregular buildings; (3) guidelines on the most appropriate strengthening solutions for irregular masonry buildings; (4) digital platform based on building information modelling with incorporation of key information of buildings that support structural seismic analysis and structural intervention towards seismic strengthening.