Material properties under dynamic loads are important to calculate for engineering applications. Investigation of steel-concrete structures requires the development new calculation and design techniques. Purpose : The aim paper is investigate effect longitudinal force on behavior bars different loads. Methodology Experimental modelling based up-to-date measuring devices analytical processing obtained results. Research findings Vibration damping inelastic work coefficients determined system...

Currently, there is a development of high-rise and unique construction, which requires the study new composite materials, calculation methods, introduction innovative technologies. Pipe-concrete structures are successful combination two completely different materials – steel concrete, combining their advantages. .In experimental part, pipe-concrete samples with length 100 mm were tested an axial compressive load. The shell pipe concrete core also separately. Based on results experiments,...

The study presents the results of experimental modeling elastoplastic deformation bent massive concrete filled steel tube beams under three-point bending. It has been shown that local deformations and crushing in such structures have a significant impact on their behavior. applicability theory bending hollow beam according to Bernoulli model is analyzed. A comparison made bearing capacity stress-strain state tubes (according experiments) beams, contribution core resistance during...

Anderson-Fabry disease (AFD) results from decreased enzyme activity of lyzosmal and intralyzosomal storage its nonhydrolyzed. Cadiovascular complications, mainly in s form HCM contribute substantially for AFD-patient’s mortality. Here we report three new cases obstructive (HOCM) due to unclassical presentation AFD isolated cardiac involvement. In all the diagnosis was made postoperative by routine genetic morphological testing. Together with previously published this illustrates potential...

The effects that occur during the transition of concrete to a complex stress state, resulting from limitation transverse deformations due steel shell, are considered using experimental modeling. studies were carried out on CFST samples three standard sizes, as well differentiated pure and tube. Diagrams work under longitudinal compression their comparison given. use structures turns be very effective not only result saturation supporting structure with material, but mutual influence...

The results of experimental studies pipe-concrete rods during longitudinal and transverse bending tests, since these stress-strain states are interest from the point view operation building structures, presented. To carry out experiments, several series laboratory samples 700 mm long were made, which steel pipes with a monolithic core made fine-grained concrete. Diagrams test installations presented methods for conducting experiments on axial compression subsequent loss stability three-point...

The article analyzes oscillations of structures combined into a mechanical system in the aerodynamic medium. Results determining characteristics solid with horizontal and vertical configuration by experimental numerical methods are presented. wind pressure isofields constructed ANSYS CFX provided. They correspond to experiment results. System influence on each object separately is shown. Frequencies forms structure natural determined. Possible shifts at characteristic points from effects...

В последние десятилетия наблюдается повышенный интерес к изучению напряженно-деформированного состояния трубобетонных конструкций – композитных элементов, состоящих из стальной трубы-оболочки и бетонного сердечника, находящегося в состоянии трехосного сжатия. таком сочетании сталь бетон позволяют достичь лучших прочностных деформативных характеристик, чем при их раздельной работе, что позволяет проектировать безопасные экономичные конструкции. настоящей статье приводятся результаты...

Anderson–Fabry disease (AFD) results from decreased enzyme activity of lysosomal enzymes and intralysosomal storage nonhydrolyzed forms. Cardiovascular complications, mainly in the form HCM, contribute substantially to AFD patient mortality. Here, we report three new cases obstructive HCM (HOCM) nonclassical presentations isolated cardiac involvement. In all cases, diagnosis was made postoperatively by routine genetic morphological testing. Together with previously published this illustrates...

The way large-sized buildings interact with wind flows cannot be analyzed when considering such objects in isolation from their environment. paper proposes a model representing the point of view hydrogasodynamics as system bodies united by aerodynamic medium. A quantitative and qualitative assessment mutual influence on characteristics at different locations was performed. results computer modeling two unique an isolated mode, well for various positions system, using methods computational...

The results of a computer modeling the distribution wind flows near diverse objects (large-span and high-rise buildings) are given analyzed. analysis pedestrian aerodynamic comfort is carried out for vertical object (a building) separately in two positions combination with horizontal one large span). Wind flow fields obtained. experiment show that complex buildings affect their distribution. point application modulus vector resultant load change. speed direction changing. A nearby building...

The design of buildings using alternative energy sources has been gaining increasing popularity in recent decades, which necessitates an in-depth study the factors affecting efficiency designed facilities. article presents results aerodynamic studies complexes high-rise with integrated wind generating plants based on computer modeling. analysis flow around three forms towers was carried out and coefficient increase velocity when passing through a generator estimated, reactions arising from...

This article examines the influence of changes in building geometry on wind flow working area generators. Air flows are an alternative source energy, and surrounding forms directly affects efficiency generators, integration which into body a has recently become popular. The research used numerical modeling Ansys CFX software package. geometric dependence length facade other parameters was derived. Six with same floor plan were considered. For more objective assessment, study carried out...

The article presents a mathematical model of the deformation process short steel-concrete rods and geometric criterion for loss bearing capacity. It studies behavior elements under action short-term compressive load using laboratory samples made from steel pipes with concrete core. diagrams longitudinal based on experimental data, as well an engineering that makes it possible to obtain P – Δ dependence tubular by scaling known diagram pipe. al-so estimates contribution core operation...

Nowadays scientific research in the field of architectural and structural aerodynamics is mainly based on simplification local geometric features examined objects. At same time, computational physical-mechanical factors similarity objects to their numerical models are emphasized as criteria for assessing accuracy experiments. It proposed extend list by using concept level geometry model. that there no connection between detail discretization rate space grid used calculation finite element...

The existing regulatory framework and imperfect calculation methods hinder the widespread use of pipe-concrete structures, which have great potential for industrial civil facilities requiring small cross-sections load-bearing elements. In order to solve this problem, a series experiments is conducted study behavior various combinations steel concrete materials under static load. Stress-strain state composite pipeconcrete structures investigated. analysis given bearing capacity test...

The aim of the study was to possibility using Dirichlet distribution as a statistical model process dynamic interaction large-span structures with aerodynamic load. As an object research, hangar building chosen for maintenance two AirbusA-380 aircraft at scale 1: 500 blown in wind tunnel five directions flow angles 0 °, 30 45 60 90 ° front structure ... It is shown that has sufficient flexibility and realism compares favorably models built on basis normal distribution, beta gamma Poisson...

Introduction. Wind load has a significant impact on buildings and structures. It triggers the evolution of stress-strain state that causes various kinds deformations. Requirements, applicable to serviceability limit state, are important for construction long-span In some cases, analysis distribution wind effects over surface facility may be challenging task. The purpose study is identify pattern shell structure using physical numerical methods, compare analyze obtained results.
...

The objective of the study was to analyze in-hospital mortality and long-term survival elderly patients who underwent open-heart surgery met criterion frailty. Materials Methods. involved 266 over 75 years old complying with frailty (F-index ≤5). A total 155 operations coronary artery bypass grafting (CABG), 47 surgeries aortic valve replacement (AVR), 64 procedures CABG in combination AVR were performed. Study subjects distributed among groups depending on type. Postoperative complications...

Abstract The work is devoted to the search of a method ultrasonic sounding for identification material state, permitting refer diagnosed structure class structures, whose state connected with appearance plastic deformations. study has shown application surface Rayleigh waves allows estimate stress-strain metal structures in field both elastic and deformation.

The paper is dedicated to search for an ultrasonic sensing method identify the state of a material that makes it possible classify structure be diagnosed as which associated with occurrence plastic strains. We examined effect C275 steel’s uniaxial strain-stress on velocity elastic Rayleigh wave. Elastic waves were generated by piezoelectric transducers using oscillation frequencies 2, 5, and 10 MHz. Transmitting receiving have been fitted in single block permanently spaced 50 mm apart....