National Repository of Grey Literature 64 records found  beginprevious55 - 64  jump to record: Search took 0.01 seconds. 
Experimental methods for study of historical structures
Drdácký, Miloš ; Jirovský, Ivo ; Lesák, Jaroslav ; Pospíšil, Stanislav ; Slížková, Zuzana ; Valach, Jaroslav ; Vavřík, Daniel
The paper presents a review of selected experimental methods for study of historic materials and structures, which have been developed or applied in the Institute of Theoretical and Applied Mechanics of the Academy of Sciences of the Czech Republic in Prague. It discusses peculiarities of the experimental investigation of historic structures and materials, which influence basic methodological approach. The contribution is focused especially on nonstandard methods of study of material characteristics and on testing of historic structures subjected to environmental loads or actions.
CRAFT projekt HISTOCLEAN - alternativní využití programu
Bryscejn, Jan ; Drdácký, Miloš ; Jakůbek, J. ; Vavřík, Daniel ; Valach, Jaroslav
A method for quality inspection of laser cleaned stone surfaces of historical buildings was developed. The method is based on analysis of the reconstructed surface topography of studied surface. The surface reconstruction employs methods of shape-from-shading and photometric stereo to obtain 3D data from sequence of digital images
Experimental-numerical evaluation of the surface plastic strain evoluation
Vavřík, Daniel ; Jakůbek, J.
The subject of this work is implentation of the incremental Prager Ziegler plasticity theory for experimental results acquired by the "Method of Interpolated Ellipses" (MIE).
DELIVERABLE D9.6 Small sample testing
Cikrle, P. ; Drdácký, Miloš ; Lesák, Jaroslav ; Slížková, Zuzana ; Válek, Jan ; Vavřík, Daniel ; Zíma, Pavel
A number of in-situ tests for mechanical material properties is readily available but there were developed improved methodologies which met the requirements and specifics of this project. It the case of historic masonry there was necessary to deal with a common additional problem, which is the testing of non-standards samples. This was for example a problem of testing of historic bedding mortars or renders, where a typical width of sample is around 10 mm. It comes along with the general need for small ů micro samples with regards to the protection of historic masonry where a minimum intervention is always required. Mechanical properties in bending were tested on non-standard mortar samples which were supplemented symmetrically on both ends with two 'prostheses'. According to the results of the tests comparing the flexural strength of pure mortar beams with the strength ascertained on prosthesized identical material the influence of prosthesization is negligible. Testing of stone samples involved comparison of the compressive and split tensile strength of specimens of standard dimensions and specimens of smaller dimensions

National Repository of Grey Literature : 64 records found   beginprevious55 - 64  jump to record:
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1 Vavřík, David
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