Experimentální měření a numerická analýza lokálních deformací předpínaného zdiva

Abstract

The dissertation deals with behavior of post tensioned masonry structures. The aim of this work is performance of laboratory measurements on the masonry corner. Into the brick corner are installed two pre-stressing bars during the brickwork (or one pre-stressing bar). Subsequently is evaluated the behavior of pre-stressed masonry corner then numerical simulations of brick corner are performed and those results are compared with measurements. In this work is presented the history of masonry structures to the present. It deals with the way of acquiring the bricks and mortar material characteristics. Procedures of acquiring knowledge about masonry structures behavior and pre-stressing in the masonry structures are mentioned. One chapter gives the summary of standards which are dedicated to masonry, masonry structures and pre-stressing of masonry structures. Laboratory testing of masonry corner starts with determination of material characteristics of masonry components, which is performed for all laboratory samples of masonry. Appropriate size of anchor plates for the transmission of tensile forces was determined on the base of standards, experimental tests and numerical models. Size of pre-stressing forces is discussed with values published in science papers. Special chapter deals with numerical modeling of masonry. Several numerical models of masonry corner are performed and compared with experiment results. Comparison of detailed model with macromodel is presented. Finally appropriate numerical models are evaluated with respect to behavior of masonry in the area of anchor plate.