Abstract

The paper presents a method of producing Circular Cross-Section Columns (CCSC), which can provide sufficiently precise dimensions, with longitudinal reinforcement securely fixed in special plugs. An investigation procedure for determining the capacity of CCSC at all the stages of their loading with eccentric pre-stressing has been presented. Based on the conducted experimental work, load carrying and deformation parameters of the strain-stress state of reinforced concrete CCSC have been obtained. The investigation results make it possible to define calculation prerequisites and fracture criteria of the deformation method of calculating compressed-bent elements of CCSC at transverse bending and reinforcement deformation below the yield point.

Highlights

  • The use of optimal reinforced concrete compressedbent elements of Circular Cross-Section Columns (CCSC) in the form of columns of frame buildings, bored piles, retaining walls, landslide protection structures, which can take up substantial lateral earth pressure, is restricted due to the lack of a sufficient amount of experimental and theoretical research of strain-stress state under the action of transverse force and longitudinal compression force

  • The development of the deformation method of the assessment of strain-stress state and load bearing capacity of compressed-bent elements of CCSC is important in order to increase the reliability of engineering buildings and structures according to a valid diagram of vertical and horizontal loading, including accidental exposures

  • In order to provide sufficiently precise dimensions of CCSC, a method of producing columns in a mould made of plastic pipes 200 mm in diameter with longitudinal reinforcement securely fixed in special plugs is presented

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Summary

Introduction

The use of optimal reinforced concrete compressedbent elements of CCSC in the form of columns of frame buildings, bored piles, retaining walls, landslide protection structures, which can take up substantial lateral earth pressure, is restricted due to the lack of a sufficient amount of experimental and theoretical research of strain-stress state under the action of transverse force and longitudinal compression force. The deformation method [10–15] of calculating load bearing capacity of the normal sections of CCSC is grounded on clear physically based prerequisites and represents the physics of the process rather precisely, making it possible to develop a calculation basis for determining load bearing capacity according to the transverse force of the above mentioned sections [16–20]. The development of the deformation method of the assessment of strain-stress state and load bearing capacity of compressed-bent elements of CCSC is important in order to increase the reliability of engineering buildings and structures according to a valid diagram of vertical and horizontal loading, including accidental exposures

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