scholarly journals EXPERIMANTAL RESEARCHES OF THE CURRENT BURDENING COURSE PLATES ACHIEVEMENTS

2019 ◽  
Vol 2 (53) ◽  
pp. 61-66
Author(s):  
Leonid Storozhenko ◽  
Dmytro Yermolenko ◽  
Іvan Tegza
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Vertical Plane ◽  
Experimental Designs ◽  
Separate Element ◽  
Study Results ◽  
Outer Perimeter ◽  
Bearing Structure

The article presents the experimental study results of flat intercolumn plates loading work peculiarities of the beamless overlapping developed system. The attention is paid to the design of the experimental designs of the bearing structure with thebevelled platforms of suspension on the outer perimeter of the span plates. The technique of performing experimental studiesis presented. The conducted researches enabled to establish the nature of deformation and destruction of intercolumn plates asa separate element in the developed system of beamless overlapping. In this case, the magnitude of the compression deformations decreases to the point where the test specimens rest on the supporting blocks. It confirms the assumption of the transferof load from the spacers to the intercolumnar on the principle of "linear hinge". Attention is paid to the fact that the achievement of the bearing capacity is not accompanied by the process of destruction, but is characterized by significant movementsof the flying part of the plate in the vertical plane.

scholarly journals Experimantal researches of the achievements of a current burdening course plates

2019 ◽  
Vol 1 (52) ◽  
pp. 82-90
Author(s):  
Іvan Tegza
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Experimental Research ◽  
Strain State ◽  
Vertical Plane ◽  
Physical Parameters ◽  
Auxiliary Equipment ◽  
Stress Strain ◽  
Test Plate ◽  
A Current

The article presents the results of the experimental study of the peculiarities of the work under the calculation load of planarsuperstructural plates of the developed system of non-beating overlap. Great attention is paid to the construction of bearingstructures prototype. The design of auxiliary equipment is described, which enabled to test the investigating U-block in conditionsthat imitate real resistance. The method of performing experimental research with indication of methods and means ofmeasuring geometrical and physical parameters that characterize the stress-strain state and bearing capacity of the test plate isgiven. The conducted investigations enabled to determine the nature of deformation and destruction of the superstructureslabs as a separate element in the developed system of non-beating ceiling. Attention is drawn to the fact that the achievementof the bearing capacity is not accompanied by the process of destruction, but is characterized by significant movementsof the supporting plots in the vertical plane

scholarly journals Numerical and Experimental Study of Lightning Stroke to BIPV Modules

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 748
Author(s):  
Xiaoyan Bian ◽  
Yao Zhang ◽  
Qibin Zhou ◽  
Ting Cao ◽  
Bengang Wei
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
Coupling Model ◽  
Maximum Temperature ◽  
Lightning Stroke ◽  
Study Results ◽  
Pv Modules ◽  
New Type ◽  
Metal Frame ◽  
Current Flows

Building Integrated Photovoltaic (BIPV) modules are a new type of photovoltaic (PV) modules that are widely used in distributed PV stations on the roof of buildings for power generation. Due to the high installation location, BIPV modules suffer from lightning hazard greatly. In order to evaluate the risk of lightning stroke and consequent damage to BIPV modules, the studies on the lightning attachment characteristics and the lightning energy withstand capability are conducted, respectively, based on numerical and experimental methods in this paper. In the study of lightning attachment characteristics, the numerical simulation results show that it is easier for the charges to concentrate on the upper edge of the BIPV metal frame. Therefore, the electric field strength at the upper edge is enhanced to emit upward leaders and attract the lightning downward leaders. The conclusion is verified through the long-gap discharge experiment in a high voltage lab. From the experimental study of multi-discharge in the lab, it is found that the lightning interception efficiency of the BIPV module is improved by 114% compared with the traditional PV modules. In the study of lightning energy withstand capability, a thermoelectric coupling model is established. With this model, the potential, current and temperature can be calculated in the multi-physical field numerical simulation. The results show that the maximum temperature of the metal frame increases by 16.07 °C when 100 kA lightning current flows through it and does not bring any damage to the PV modules. The numerical results have a good consistency with the experimental study results obtained from the 100 kA impulse current experiment in the lab.

scholarly journals Experimental Study on Residual Bearing Capacity of Existing Prestressed Concrete Hollow Slab Beam

2021 ◽  
Vol 632 ◽  
pp. 022063
Author(s):  
Baoqun Wang ◽  
Dejin Xing ◽  
Chengyong Chen ◽  
Zhongnan Tian ◽  
Gangnian Xu
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Prestressed Concrete

Experimental Study about Bearing Capacity and Deformation on Concrete Composite Slabs with Additional Bars

2013 ◽  
Vol 482 ◽  
pp. 7-10
Author(s):  
Jian Hua Cui ◽  
Chuan Yang Weng ◽  
Yun Lin Liu
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Failure Mode ◽  
Static Loading ◽  
Flexural Behavior ◽  
Flexural Properties ◽  
Effective Height ◽  
Composite Slabs

Through the experiments of four concrete composite slabs under static loading to compare their flexural properties (deflection, bearing capacity, failure mode), this paper discusses the influence of composite slabs flexural behavior on different length of additional bars and sectional effective height. The results showed that they will improve the bearing capacity effectively by reasonably increasing the sectional effective height and controlling the length of additional bars.

Effect of reverse thermoelastic phase transformation on stress of onset of structural deformation in titanium nickelide

2021 ◽  
pp. 2-10
Author(s):  
A. A. Movchan ◽  
◽  
S. A. Kazarina ◽  
A. L. Silchenko ◽  
◽  
...  
Keyword(s):  
Experimental Study ◽  
Phase Transformation ◽  
Inelastic Deformation ◽  
Titanium Nickelide ◽  
Structural Deformation ◽  
Isotropic Hardening ◽  
Reverse Phase ◽  
Maximum Value ◽  
Study Results ◽  
Thermoelastic Phase Transformation

The experimental study results of the dependence in the stress value of the onset of the structural deformation on the degree of the reverse phase transformation occurring after the complete direct martensitic transformation in titanium nickelide are described. It is established that these results are qualitatively and quantitatively correctly described in the framework of the model according to which the maximum value of the intensity of the intrinsic inelastic deformation of the martensitic part of the representative volume of the shape-memory alloy is used as a parameter of isotropic hardening.

scholarly journals Supporting awareness of content-related controversies in a wiki-based learning environment

2017 ◽  
Author(s):  
Sven Heimbuch ◽  
Daniel Bodemer
Keyword(s):  
Experimental Study ◽  
Learning Environment ◽  
Knowledge Construction ◽  
Learning Processes ◽  
User Generated Content ◽  
External Representations ◽  
Study Results ◽  
Discussion Threads ◽  
Contradictory Evidence ◽  
Awareness Support

User generated content in wikis is mainly distributed on the article view and its corresponding talk page. Potentials of analyzing and supporting discussants' knowledge construction processes on the level of talk pages have still been rarely researched. The presented experimental study addresses this issue by providing external representations of content-related controversies which were led by contradictory evidence between discussants to foster awareness on socio-cognitive conflicts which can be beneficial for learning. Its aim is to investigate how increased salience of controversies can guide participants' (N = 81) navigation and learning processes. Three conditions differing in their degree of awareness support were implemented in this study. Results indicate that the implementation of awareness representations helped students to focus on meaningful discussion threads. Findings suggest that wiki talk page users can benefit from additional structuring aids.

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