LOG-IDEAH: LOGic trees for identification of damage due to earthquakes for architectural heritage

Abstract

In the framework of PERPETUATE, LOG-IDEAH: "LOGic trees for Identification of Damage due to Earthquakes for Architectural Heritage" has been developed as a post-earthquake assessment tool for the evaluation of the global seismic performance of architectural assets (AAs). LOG-IDEAH is an expert system which interprets the seismic damage collected on site by relying on the knowledge of engineers and architects in seismic vulnerability assessment. The present expert system has been set up on logic trees, implemented in answer set programming to encode the recognition process that surveyors proceed to investigate the causes of damage and to evaluate the failures occurring on an AA. LOG-IDEAH, available at (http://perpetuate.cs.bath.ac.uk/), allows sketching AAs, recording the state of damage, uploading GPS referenced images and comparing collapse mechanisms observed on site with collapse mechanisms identified by the system. The seismic damage, which is the minimum data required by LOG-IDEAH, is collected at the level of both structural elements and artistic assets (local level) and interpreted at the level of the AA (global level). The answer set programming applied for the construction of the machine-processable representation, once the input data has been recorded into the web-interface, provides all possible failure modes and related possibilities of occurrence by taking into consideration the reliability level of the collected data. Its capability has been validated by applying LOG-IDEAH to the historic centre of L'Aquila of the 2009 earthquake by pointing out that answer set programming is a valid alternative approach to the existing methods developed to identify the seismic performance of masonry AAs.

Macroseismic risk classification of historical constructions: the LEXSIS approach

“…structures and non-structural elements). Each of them is described through the sub-sections referring to typology, vulnerability, local collapse mechanisms (with reference only to the vertical structures), and retrofit interventions (Novelli and D'Ayala 2015).…”

A procedure for the identification of the seismic vulnerability at territorial scale. Application to the Casbah of Algiers

“…In a small number of cases, reinforced concrete frame buildings are also present in adjacency to masonry houses or above or inside original masonry buildings. This layout has direct implications on the seismic behaviour of the single building and the cluster, and leaves some of them at severe risk of hammering, as indeed observed (Muthukumar and Desroches 2004) The load bearing system, composed by sets of orthogonal walls, is made up of brickwork, or roughly hewn stone with randomly inserted bricks, or dressed stones with more regular brick courses. The wall thickness varies from 30 cm for the poorest quality to 90 cm or more for defence structures.…”

Assessment and Monitoring of Historical Timber Construction: Available Tools to Support Decision-Making Processes

“…The main scope of the developed "Monument Damage Ontology" is to enable collaboration and data-sharing within the expert community, as well as to integrate existing data from different sources [19]. On line, expert-trained systems accessible from mobile devices have been developed to support timesensitive, decision-making processes during assessment of damaged structures (for instance, planning shoring and repairs to avoid imminent collapse) (see for instance, [20]. The FaMIVE (Failure Mechanism Identification and Vulnerability Evaluation) [21], has been designed to be a flexible data collection platform for vulnerability assessment of historical structures, including traditional timber roofs and floors.…”