Typological classification of defects of making the concrete core of tube confined concrete constructions

Authors

  • O. V. Semko Department of Architecture and Urban Construction, Poltava National Technical Yuri Kondratyuk University, 24, Pershotravnevyi avenue, Poltava, 36011, Ukraine, Ukraine
  • O. M. Gukasian Department of Architecture and Urban Construction, Poltava National Technical Yuri Kondratyuk University, 24, Pershotravnevyi avenue, Poltava, 36011, Ukraine, Ukraine

Keywords:

tube confined concrete, concrete technology, concrete defects, defects classification, variability of concrete strength.

Abstract

Goal.  To make the classification of technological defects formation process of the concrete core on the basis of  typological  comparative  analysis.  According  to  the  results  of  the  latest  research  papers  and  publications,  which  describe  the researches of defects and damages of building  constructions, which  lead to the reduction of their carrying capacity and reliability, similar  researches on the  tube-confined  concrete in Ukraine are almost absent.  Methods.  Methods of experimental studies of the impact of existing defects and damages on the strength and nature of the stress-strain state of the tube confined concrete elements are studied. The research of samples was held at the laboratory with the help of two  types of samples. One of them is tube confined concrete elements with the defects of concreting, where concrete samples filling were carried out according to various schemes. The characteristics of the cylinder concrete samples without metal shell for reducing the impact of the tube shell were also examined for more detailed study of this subject.  Results. The analysis of defects research of concreting the cube confined concrete elements and sample-cylinders, which showed that the presence of even a small  concrete strength variability or unsatisfactory concrete work can significantly reduce the carrying capacity of the construction to 30% was held. Sample-cylinders with the strength reinforcement 2/4l and other samples of this type, which have lower meaning  of strength from 5 to  9  % have shown positive results. Concrete defects classification and the research of possible causes of their occurrence were made.  Scientific novelty.  Analyzing the technology  of concreting there is the opportunity to estimate the defects of concreting the tube confined concrete elements and the strength of the samples in height and their impact on the carrying capacity. The results of the experimental studiescan be the basis of theoretical ground  of  defect-free  technology  of  concreting  core,  energy  efficient  manufacturing  technology  of  making  reinforced-concrete constructions. They will also expand theoretical understanding of the impact of defects on the reliability of concrete core structures of this type. Practical significance. The results of the research can be the basis for preventing concrete defects and developing the main principles of standardization of technical conditions of the concerned type of the constructive elements. 

Author Biographies

O. V. Semko, Department of Architecture and Urban Construction, Poltava National Technical Yuri Kondratyuk University, 24, Pershotravnevyi avenue, Poltava, 36011, Ukraine

ph. d., professor

O. M. Gukasian, Department of Architecture and Urban Construction, Poltava National Technical Yuri Kondratyuk University, 24, Pershotravnevyi avenue, Poltava, 36011, Ukraine

postgraduate student

References

Voskobiynyk O.P. Some aspects of the reliability of compressed tube confined concrete elements [Building constructions: Coll. science. works]. Kiev. 2006. pp. 152-159.

Voskobiynyk O.P. Typological classification of defects and damages of composite constructions[Construction, material engineering, machine building: Coll. science. works]. Dnipropetrovs’k, PSАES, 2011. – pp. 98-108.

Voskobiynyk O.P. Typological comparison of defects and damages of concrete, metal and composite beam structures [Visnyk of National University] "Lviv Polytechnic". Theory and practice of construction. Lvov, 2010. – pp. 97 – 103.

Malhanov A.I., Plevkov V.S. and Polishchuk A.I.. Restoration and enhancement of building structures of emergency and reconstructed buildings: map of drawings and schemes [Text] / - Tomsk: Vol. University Press, 1990. - 456 p.

Ilyasevich S.A. Pipe steel constructions. Experimental theoretical researches [Stroyizdat].Moscow, 1973. – 191p.

Nazarov O.V. Strain-stress state of cube confined concrete elements at the local force influence: Abstract. - Kyiv, 2004. – 20p.

Kikin A.I., Sanzharovskii R.S. and Trul V.A. Constructions made of steel tubes filled with concrete.[ Stroyizdat] Moscow, 1974. – 145p.

Komar A.G. Technology of concrete and reinforced-concrete products [Stroyizdat]. Moscow, 1984. - 267p.

Semko O.V. Probabilistic aspects of calculating composite constructions. Monograph [Stal ]. Kiev, 2004. - 316 p.

Semko O.V., Hasenko A.V. and Kutsenko O.E. Examination of cube confined concrete elements with weakened core [Roads and bridges: Coll. science. pr.] - Kiev.: DerzhdorNDI, vol. 2, 2007.pp. 162-168.

Storozhenko L.I., Semko A.V. and Efimenko V.I. Composite structures [Fourth Hvilya]. Kiev, 1997. - 160p.

Leschynskyy A.M. Classification of inhomogeneities of durability concrete [Building constructions: Republican interdepartmental scientific and technical collection.]. Kiev, Budivelnik, 1986, Vol. 39, pp 47-49.

Bergmann R. German Design Method for Composite Columns with Concrete Filled Sections [Concrete filled steel tubes. A comparison of international codes and practices]. ASCCS Seminar, Innsbruck, 1997. P. 27 -38

Hanswille G. and Lippes M. Design of composite columns made of concrete filled tubes with inner massive core profiles and high strength materials. Germany, 11 p. http://ccvi.ce.gatech.edu/Papers March PDF/Lippes M.pdf

Eurocode 4. Common Unified Rules for Composite Steel and concrete Structures European Committee for Standardization (CEN) ENV. 1994 1-1: 1992. http://eurocodes.jrc.ec.europa.eu/doc/WS2008/EN1994_4_Hanswille.pdf

Shosuke Morino and Keigo Tsuda Design and Construction of Concrete-Filled Steel Tube Column System in Japan/ Earthquake Engineering and Engineering Seismology/ Japan Vol. 4, No. 1 pp. 51-73. http://www.ctsee.org.tw/出版品/200310/ee0401-05.pdf

Published

2016-02-23

Issue

Section

Creating of high-tech ecological complexes of Ukraine based on the concept of balance (stable) development