CZECH TECHNICAL UNIVERSITY IN PRAGUE Faculty of Civil Engineering Thákurova 7, 166 29 Prague 6, Czech Republic MASTER‘S THESIS PROPOSAL study programme: Civil Engineering study branch: Advanced Masters in Structural Analysis of Monuments and Historical Constructions academic year: 2017/2018 Student’s name and surname: Bledian Nela Department: Department of Mechanics Thesis supervisor: Jiří Bláha Thesis title: The analysis of the timber roofs of the Loreta in Prague Thesis title in English see above Framework content: Historical analysis of the timber roofs of Loreta in Prague. Non-destructive testing of the timber frame in the southern part of West wing roof. Structural analysis of a deformed timber frame in the West wing roof. The stability check and the efficiency of the current strengthening undertaken. Safety evaluation of the frame and strengthening proposal to enforce the frame. Assignment date: 9/04/2018 Submission date: 02/07/2018 If the student fails to submit the Master’s thesis on time, they are obliged to justify this fact in advance in writing, if this request (submitted through the Student Registrar) is granted by the Dean, the Dean will assign the student a substitute date for holding the final graduation examination (2 attempts for FGE remain). If this fact is not appropriately excused or if the request is not granted by the Dean, the Dean will assign the student a date for retaking the final graduation examination, FGE can be retaken only once. (Study and Examination Code, Art 22, Par 3, 4.) The student takes notice of the obligation of working out the Master’s thesis on their own, without any outside help, except for consultation. The list of references, other sources and names of consultants must be included in the Master’s thesis. ........................................................ ....................................................... Master’s thesis supervisor Head of department Date of Master’s thesis proposal take over: July 2018 ...................................................... Student This form must be completed in 3 copies – 1x department, 1x student, 1x Student Registrar (sent by department) No later than by the end of the 2nd week of instruction in the semester, the department shall send one copy of BT Proposal to the Student Registrar and enter data into the faculty information system KOS. (Dean’s Instruction for Implementation of Study Programmes and FGE at FCE CTU Art. 5, Par. 7) The analysis of the timber roofs of the Loreta in Prague DECLARATION Name: Bledian Nela Email: [email protected] Title of the The analysis of the timber roofs of the Loreta in Prague Msc Dissertation: Supervisor(s): Jiří Bláha Year: 2017/18 I hereby declare that all information in this document has been obtained and presented in accordance with academic rules and ethical conduct. I also declare that, as required by these rules and conduct, I have fully cited and referenced all material and results that are not original to this work. I hereby declare that the MSc Consortium responsible for the Advanced Masters in Structural Analysis of Monuments and Historical Constructions is allowed to store and make available electronically the present MSc Dissertation. University: Czech Technical University Date: 02/07/2018 Signature: ___________________________ Erasmus Mundus Programme ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS i The analysis of the timber roofs of the Loreta in Prague This page is left blank on purpose. Erasmus Mundus Programme ii ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS The analysis of the timber roofs of the Loreta in Prague To my family Erasmus Mundus Programme ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS iii The analysis of the timber roofs of the Loreta in Prague This page is left blank on purpose. Erasmus Mundus Programme iv ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS The analysis of the timber roofs of the Loreta in Prague ACKNOWLEDGEMENTS The SAHC master is very intensive and quite challenging and without the help and support of some people would be impossible. Initially, I would like to thank my supervisor Prof. Jiří Bláha, for his guidance and his wise counselling throughout this thesis. I am privileged to participate in SAHC master and therefore I would like to thank the SAHC consortium for giving me this opportunity. I would especially like to thank University of Minho, Czech Technical University and Institute of Theoretical and Applied Mechanics and all their staff. Many thanks go to Prof. Petr Kabele for his counselling in structural mechanics. Further thanks regarding structural modeling go to Jiří Kunecký and Hana Hasníková. With the help to draw the geometry I would like to thank Jaroslav Buzek. Many thanks go to Michal Kloiber and Jaroslav Hrivnák, with the help of whom were carried out the non-destructive tests. Sincere thanks go to Ms Markéta Baštová and the menagement of Loreta, who provided access and many resources for this thesis. When it comes to resources lots of thanks go also to the Capuchin Order archives. Additional thanks go to Sharrcem company, Kosovo CSR Network and the project leader of “Frozen Music” Senton Kaçaniku for the scholarship and guidance to carry out this master. Some very special thanks go to my friends in SAHC for all the challenges, the many working hours and all the unforgettable moments we have been through. The most special thanks go to all the real Prague boys who will always be in my heart. Finally, for all the support and the biggest patience I would like to thank my family and my beloved Sebi. Without their help and their sincere love, it would be impossible to be here. Erasmus Mundus Programme ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS v The analysis of the timber roofs of the Loreta in Prague This page is left blank on purpose. Erasmus Mundus Programme vi ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS The analysis of the timber roofs of the Loreta in Prague ABSTRACT The Loreto of Prague is a remarkable Baroque historic monument, a place of pilgrimage with a captivating history. Behind the main façade, which is the marvelous work of the famous Dientzenhofers, there is a courtyard with a copy of the St. Mary´s Holy House of Nazareth. Beside the St. Vitus Cathedral treasure, Loreto holds the most valuable treasury in Czech Republic whose main jewel is a monstrance called the Prague Sun created with the use of 6222 diamonds. Since the placement of the first construction stone in 1626, the Loreto has faced many construction phases with many alterations. The majority of the works progressed between 1698 and 1748 under the supervision of Christoph and Kilian Ignaz Dientzenhofer. These alterations also generated some changes in the configuration of the roof structure and in some parts caused even damages. Some of interventions observed on timber frames are not documented and their purpose is not always obvious. To have a better understanding, a historical analysis of the Loreto complex was used recently refined by dendrochronological dating of timber roofs elements from different time periods, so the historical chronology of the building could be accomplished. Non-destructive on-site tests were conducted on the timber frames to evaluate the condition of their individual elements and to obtain their mechanical properties. With these parameters, the structural analysis is executed of the timber frame section which suffers from the most significant deformation. A spatial model for the members affecting the frame was created. From the 3D model all the loads transferred to the frame of interest were regenerated in a more detailed 2D plane model. Elements subjected to non-destructive testing proved relatively good condition with small qualitative differences between individual members. With the structural modeling, it was possible to evaluate their safety and stability and also to assess the effectiveness of their strengthening. The possible causes of their actual deformations were discussed and measures designed to eliminate future problems were proposed. Keywords: Baroque, carpentry, dendrochronology, survey, timber Erasmus Mundus Programme ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS vii The analysis of the timber roofs of the Loreta in Prague This page is left blank on purpose. Erasmus Mundus Programme viii ADVANCED MASTERS IN STRUCTURAL ANALYSIS OF MONUMENTS AND HISTORICAL CONSTRUCTIONS The analysis of the timber roofs of the Loreta in Prague ABSTRAKT Analýza dřevěných střech Lorety v Praze Pražská Loreta je pozoruhodnou kulturní památkou, významným barokním poutním místem s podmanivou historií. Za hlavním průčelím, které je velkolepým dílem slavných Dientzenhoferů, je skryto nádvoří s kopii Svaté chýše, nazaretského domu Panny Marie. Po pokladnici katedrály sv. Víta vlastní muzeum Lorety druhou nejcennější klenotnici v České republice, jejímž hlavním skvostem je monstrance zvaná Pražské slunce zhotovená s použitím 6222 diamantů. Od umístění základního kamene v roce 1626 zde postupně proběhla řada stavebních fází s mnoha většími, či menšími změnami. Většina prací proběhla v letech 1698 až 1748 pod vedením Kryštofa a Kiliána Ignáce Dientzenhoferů. Úpravy způsobovaly pochopitelně i změny v konfiguraci střech a střešních konstrukcí, v některých částech došlo i k jejich dílčímu poškození.