Browsing Ústav stavební mechaniky by Title
Now showing items 1-20 of 119
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Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
(MDPI, 2021-10-25)This paper presents the results of an experimental program aimed at the assessment of the freeze–thaw (F–T) resistance of concrete based on the evaluation of fracture tests accompanied by acoustic emission measurements. ... -
Analysis of accuracy of Williams series approximation of stress field in cracked body – influence of area of interest around crack-tip on multi-parameter regression performance
(Gruppo Italiano Frattura, 2017-01-01)A study on the accuracy of an approximation of the stress field in a cracked body is presented. Crack-tip stress tensor is expressed using the linear elastic fracture mechanics (LEFM) theory in this work, more precisely ... -
Approximation of the crack-tip field in fatigue cracks in bridge steel specimens: DIC analysis of different constraint levels
(Gruppo Italiano Frattura, 2019-07-01)A study on the accuracy of the approximation of the displacement field around of crack tip in a sample made from bridge steel (S355) is main objective of contribution. Linear elastic fracture mechanics (LEFM) theory in ... -
Assessment of crack stability in a quasi-brittle particle composite
(Elsevier, 2017-01-01)Fracture behaviour of a crack in a particle (silicate based) composite is studied. The crack propagation depends not only on mutual elastic mismatch of matrix and aggregate but also the influence of the interfacial transition ... -
Assessment of the transportation route of oversize and excessive loads in relation to the load-bearing capacity of existing bridges.
(IOP Publishing, 2017-09-15)Transportation routes of oversize and excessive loads are currently planned in relation to ensure the transit of a vehicle through critical points on the road. Critical points are level-intersection of roads, bridges etc. ... -
Boundary Layer Effect on Behavior of Discrete Models
(MDPI, 2017-02-10)The paper studies systems of rigid bodies with randomly generated geometry interconnected by normal and tangential bonds. The stiffness of these bonds determines the macroscopic elastic modulus while the macroscopic ... -
Cement based composites for thin building elements: Fracture and fatigue parameters
(Elsevier, 2010-06-06)For application in civil engineering structures and also for strengthening existing structures cement-based composites are one of the most frequently used materials. Although many studies have been conducted on the mechanical ... -
Change of Fatigue and Mechanical Fracture Properties of a Cement Composite due to Partial Replacement of Aggregate by Red Ceramic Waste
(Budapest University of Technology and Economics, 2019-01-08)Fine-grained cement-based composites used in civil engineering and construction industry are usually made of cement-based matrix and natural aggregate (such as sand, gravel, crushed stone, etc.). Red ceramic waste agggregate ... -
CHARACTERISATION OF THERMAL-LOADED CEMENT-BASED COMPOSITES BY COMBINED TIME-LAPSE TOMOGRAPHY AND THE FOUR-POINT BENDING TEST
(CTU in Prague, Faculty of Civil Engineering, 2020-04-01)Quasi-brittle materials like cement-based composites, rocks, and bricks are subjected to a number of environmental loadings throughout the life cycle of buildings. For instance, fluctuation of the ambient temperature ... -
Comparison of fatigue crack propagation behaviour in two steel grades S235, S355 and a steel from old crane way
(EDP Sciences, 2020-03-05)Utilization of various steel grades in civil engineering allows designing bridges, bridge elements or simple structures according to their fracture mechanical properties. The service intervals of structures, which are going ... -
Comparison of Fracture Resistance of the Normal and High Strength Concrete Evaluated by Brazilian Disc Test
(MPDI, 2018-05-19)Nowadays, high performance concrete is used more frequently because of the many advantages compared to traditional concrete. The higher mechanical properties (e.g., compressive strength, flexural strength, and Young’s ... -
A comparison of spectral values obtained in bridge structures via radar interferometry and numerical calculations
(EDP Sciences, 2017-05-24)Radar interferometry measurements were used to determine the dynamic response of two bridges. The dynamic excitation was performed via trucks crossing the road bumps placed upon each structure. From the relevant records ... -
Complex multilevel fracture tests of concrete: basic mechanical fracture parameters of standard size specimens.
(EDP Sciences, 2020-10-05)The aim of the current research is to develop a complex multilevel approach for experimental–computational determination of mechanical fracture parameters of concrete as a typical quasi-brittle material. This includes ... -
Components of the Fracture Response of Alkali-Activated Slag Composites with Steel Microfibers
(MDPI, 2019-05-16)Knowledge of the mechanical and primarily fracture parameters of composites with a brittle matrix is essential for the quantification of their resistance to crack initiation and growth, and also for the specification of ... -
Crack behaviour at the interface of a surface layer applied on a steel substrate by laser cladding
(IOP Publishing, 2021-12-21)An influence of the bi-material interface between a steel substrate and a thin protective layer applied through laser cladding was investigated. A range of elastic properties and thicknesses of the layer were considered ... -
Crack propagation in a brittle DCB specimen assessed by means of the Williams’ power expansion
(Gruppo Italiano Frattura, 2019-04-01)A double cantilever beam geometry has been chosen in order to investigate the importance of the higher-order terms of the Williams’ power expansion for the crack path estimation. The crack propagation has been tested ... -
Crack propagation in mixed-mode specimens described via multi-parameter fracture mechanics
(IOP Publishing, 2019-10-08)The main objective of the paper is to employ a multi-parameter fracture mechanics concept to describe crack propagation through a specimen loaded in mixed-mode. This concept in particular was used because it has been shown ... -
Decision Making Methods and Applications in Civil Engineering
(Hindawi, 2015-08-28)Articles published in this special issue prove that useful information for making construction related decisions can be obtained by methods which do not belong to a formal DM, for instance, sensitivity analysis, stochastic ... -
Deflection of an eccentric crack under mixed-mode conditions in an SCB specimen
(The Publishing Office of Czestochowa University of Technology, 2021-07-26)Crack propagation under mixed-mode (I + II) conditions has been investigated in a semicircular disc where various levels of mixed-mode can be achieved by means of different geometry configurations. The research has been ... -
Determining fracture energy parameters of concrete from the modified compact tension test
(Gruppo Italiano Frattura, 2014-09-01)The modified compact tension (MCT) test, though not yet recognized as a valid test for determining fracture energy of concrete, is believed to represent a plausible and suitable alternative versus other well established ...