Impact of Non-Uniform Distribution of Temperature on the State of Stress of Masonry

0351010 - ÚTAM 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Beran, Pavel
Impact of Non-Uniform Distribution of Temperature on the State of Stress of Masonry.
2nd Historic Mortars Conference. Praha: UTAM, v.v.i, 2010 - (Válek, J.; Groot, C.; Hughes, J.), s. 899-907. ISBN 978-2-35158-112-4.
[Historic mortars conference /2./. Praha (CZ), 22.09.2010-24.09.2010]
Grant CEP: GA ČR(CZ) GA103/07/1467
Výzkumný záměr: CEZ:AV0Z20710524
Klíčová slova: material compatibility * heat transfer * material characteristic
Kód oboru RIV: JN - Stavebnictví

Deterioration of masonry is caused by inordinate loading and by climatic actions. Climatic cyclic thermal stress in a structure is incurred by unequal temperature gradient across the thickness of homogenous or heterogeneous masonry. Thermal gradient also causes significant stress close to the interface between stone and mortar in masonry made of components with different thermal expansion properties. The values of thermal stress increase with higher thermal gradient. Impact of insolation, absorption of solar radiation, air temperature around the structure, heat transfer coefficient, coefficient of heat conduction, and heat capacity to the temperature gradient in the wall exposed to the exterior weather conditions were investigated with a numerical model. All of these effects or material properties affect the maximal surface temperatures in masonry during summer.
Trvalý link: http://hdl.handle.net/11104/0190855