engleski

Monitoring of Fissures on Construction of Saint Duje Chatedral in Split, Croatia

Saint Duje cathedral in Split, Croatia, is a reconstructed mausoleum made as a part of Diocletianus palace. Main reconstruction, beside construction of church tower, is added part of construction on eastern side. On this part fissures occurred because of different conditions in the foundations compared with original mausoleum foundation. Deformations are partly caused with constructions, reconstructions and archeological investigations on buildings surrounding added part of cathedral. For the purpose of the building reconstruction monitoring system with 11 points of measurements is applied. Monitoring system measure parameters: a surrounding ambient temperatur, ambient moisture and a displacement of the fissures (opening and closing). Measurements were made for three years, since September 1996. Analyze of the fissures displacement occurred on a connection between old part and added part of building, shows good agreement with temperature changes. So, the main reason for the movements are temperature extensions of the walls material. A fissures on the eastern side of the added part shows tendency of opening. Different displacements in points along the fissure shows that the main reason of deformation is insufficient lateral support of the foundation on north wall. Lateral support (meaning earth and constructions) is removed during archeological investigations and diggings made in last 30 years. For the purpose of reconstruction validity test and prove, monitoring system shall be hold few years after the reconstruction finish. Non-destructive damage analysis methods are very usefull when damages are not so large as to endager the building's stability, since they demand long-period data gathering. Automatic monitoring and data recording, as well as permanent statistical data analysis, are welcome. This paper demonstrated that monitoring shorter than a year is almost of no use in this sort of analysis. Correct interpretation of the obtained data, based on statistical analysis, is also of major importance. This paper presented just a few possible statistical methods.

chatedral; mausoleum; Diocletianus; fissure; monitoring

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