Axial compression of reinforced concrete columns strengthened by composite of prestressed plastic‐steel strip and angle steel: An experimental study

The results of an experimental program on eight short reinforced concrete columns having different structural sizes and axial compression ratios subjected to monotonic/cyclic lateral loading were reported. A 3D mesoscopic simulation method for the analysis of mechanical properties of reinforced concrete members was established, and then it was utilized as an important supplement and extension of the traditional experimental method. Lots of numerical trials, based on the restricted experimental results and the proposed 3D mesoscopic simulation method, were carried out to sufficiently evaluate the seismic performances of short reinforced concrete columns with different structural sizes and axial compression ratios. The test results indicate that (1) the failure pattern of reinforced concrete columns can be significantly affected by the shear-span ratio; (2) increasing the axial compression ratio could improve the load capacity of the reinforced concrete column, but the deformation capacity would be restricted and the failure mode would be more brittle, consequently the energy dissipation capacity could be deteriorated; and (3) the load capacity, the displacement ductility, and the energy dissipation capacity of the short reinforced concrete columns all exhibit clear size effect, namely, the size effect could significantly affect the seismic behavior of reinforced concrete columns.

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Experimental Study Of Reinforced Concrete Columns Concealing Rain Water Pipe

Jurnal Teknologi ◽

10.11113/jt.v43.763 ◽

2005 ◽

Vol 43 (1) ◽

Author(s):

Jahangir Bakhteri ◽

Syed Ahmad Iskandar

Keyword(s):

Experimental Study ◽

Reinforced Concrete ◽

Concrete Columns ◽

Rain Water ◽

Water Pipe ◽

Reinforced Concrete Columns

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Experimental study of the strengthening effect of reinforced concrete columns jacketed under service load level

MATEC Web of Conferences ◽

10.1051/matecconf/201818302008 ◽

2018 ◽

Vol 183 ◽

pp. 02008 ◽

Cited By ~ 21

Author(s):

Pavlo Krainskyi ◽

Yaroslav Blikharskyy ◽

Roman Khmil ◽

Zinoviy Blikharskyy

Keyword(s):

Experimental Study ◽

Reinforced Concrete ◽

Concrete Columns ◽

Load Level ◽

Strengthening Effect ◽

Engineering Structures ◽

Reinforced Concrete Columns ◽

Technical Modification ◽

Service Load

The need of structural retrofitting and strengthening of different buildings, engineering structures or their elements is always present. Among the main reasons are demages and material deterioration due to aging, improper maintenance or physical damages; planed repairs; reconstruction or extension of the building; technical modification or complete change of operations inside the building or the structure, etc. In some cases operation of the building during retrofitting or strengthening of its structures has to be partially or fully stopped. In other cases the strengthening process takes place while the building is still operational which means that structures are strengthened under service loads. The main goal of this research is to determine the strengthening effect of reinforced concrete jacketing applied to columns under service load level. For that the experimental study of six reinforced concrete columns were carried out: four reference columns, both strengthened by jacketing and unstrengthened and two strengthened under service load. The main results of the research are presented.

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