Behavior of Circular Concrete Columns Repaired with Steel

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Behavior of Circular Concrete Columns Repaired with Steel

Behavior of Circular Concrete Columns Repaired with Steel ...

In order to increase the strengthening efficiency of steel bar mat-mortar (BM) jacket and wire mesh-mortar (WM) jacket around existed circular concrete columns, an attempt to strengthen the columns with hybrid bar mat-wire mesh-mortar (HBWM) jacket was proposed. A comparatively experimental study on axial compression behaviors of concrete columns wrapped with three different strengthening systems, namely BM, HWBM and carbon fiber reinforced polymer (CFRP) was performed.

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Behavior of Circular Fiber-Reinforced Polymer–Steel-Confined ...

Sep 09, 2019 · Abstract. This paper studied experimentally the behavior of circular fiber-reinforced polymer (FRP)–steel-confined concrete columns subjected to reversed cyclic loads. The influence of main structural factors on the cyclic behavior of the columns is discussed. Test results showed the outstanding seismic performance of FRP–steel-confined RC and steel-reinforced concrete (SRC) columns.

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Experimental behavior of circular concrete-filled steel tube ...

Feb 01, 2007 · This paper presented an experimental study on the behavior of circular, concrete-filled, steel tube (CFT) stub columns with self-compacting concrete (SCC) and normal concrete (NC) concentrically loaded in compression to failure. Four measurement methods on the axial deformation of specimens were compared.

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Behavior of heat damaged circular reinforced concrete columns ...

Sep 01, 2020 · This study aims to investigate the behavior of repaired circular reinforced concrete (RC) columns exposed to temperature considering the effect of spacing between CFRP ropes, area of CFRP ropes and degree of temperature. Nine circular column specimens with diameter of 185 mm and length of 800 mm were constructed and tested.

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Behaviour of circular concrete-filled lean duplex stainless ...

Nov 01, 2013 · In the early stages of loading, the Poisson’s ratio of the concrete core in a circular CFST column is less than that of the steel so that the steel tube does not provide confinement on the concrete core as discussed by Neogi et al. and Johansson and Gylltoft . As the loading increases, the Poisson’s ratio of concrete increases and becomes greater than that of the steel tube.

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Compressive Behavior of Circular Tubed Steel-Reinforced High ...

Sep 09, 2019 · In this paper, a total of 12 circular tubed steel-reinforced concrete (CTSRC) short columns with high-strength concrete are constructed and tested under axial compressive load. The main variables of the test include diameter-to-thickness ratio and yield strength of the steel tube, concrete strength, and the steel ratio of the profile steel.

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Structural behavior of slender circular steel-concrete ...

In an experimental and analytical study on the structural behavior of slender circular steel-concreterncomposite columns, eleven specimens were tested to investigate the effects of three ways to apply arnload to a column. The load was applied eccentrically to the concrete section, to the steel section or to the entirernsection.

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Mechanical Behavior of Circular Steel–Concrete Composite Stub ...

The bond strength had no influence on the behavior when the steel and concrete section were loaded simultaneously. On the contrary, for the columns with the load applied only to the concrete section, the bond strength highly affected the confinement effects and, consequently, the mechanical behavior of the columns.

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Cyclic behavior of damaged reinforced concrete columns ...

Apr 01, 2017 · Replacing all visually-observable cracked concrete with HPFRCC improves the cyclic behavior of repaired columns. Under the existing axial load, repairing a damaged column in the plastic hinge zone only (300 mm in height) increased the load capacity and the displacement ductility by 9% and 21%, respectively.

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Behavior of Centrally Loaded Concrete-Filled Steel-Tube Short ...

A 5 year research on concrete-filled steel tubular (CFT) column system was carried out as a part of the fifth phase of the U.S.–Japan Cooperative Earthquake Research Program, and the tests of centrally loaded short columns were finished.

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Behavior of circular concrete-filled steel tubular columns ...

In order to understand the mechanical behaviors of concrete-filled round-ended steel tubular (CFRT) stub columns, an experimental study on 4 concrete-filled circular steel tubular (CFT) stub ...

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[PDF] Behavior and design of slender circular tubed ...

Abstract The tubed-reinforced-concrete (TRC) column is a relatively new kind of confined reinforced-concrete (RC) columns, where the outer encasing thin-walled steel tube is discontinued at the beam–column joint and thus the axial load is transferred to the RC core only. In this paper, the behavior of slender circular TRC columns under eccentric compression loads was studied. A total of ...

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Behavior of circular concrete-filled double steel tubular ...

The hollow circular steel tubes support the permanent and construction loads of several upper floors during the construction of a high-rise building structure before the concrete is filled into the steel tubes to form circular concrete-filled double steel tubular (CFDST) columns.

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SEISMIC BEHAVIOR AND ASSESSMENT OF CIRCULAR CONCRETE COLUMNS ...

Four circular columns with diameter of 250mm were tested under combined reversed cyclic lateral force to investigate the seismic behavior of circular concrete columns partially confined by bolted thin steel plates with the aim of developing earthquake-resilient concrete columns. The main experimental

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Behavior of Concrete-Filled Steel Tube Columns Subjected to ...

The behavior of concrete-filled steel tube (CFST) columns subjected to axial compression was experimentally investigated in this paper. Two kinds of columns, including CFST columns with foundation and columns without foundation, were tested. Columns of pure concrete and concrete with reinforcing bars as well as two steel tube thicknesses were considered. The experimental results showed that ...

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Behavior of eccentrically loaded double circular steel ...

N2 - Circular concrete-filled double steel tubular (CFDST) columns in high-rise building structures possess high ductility and strength performance owing to the concrete confinement exerted by the external and internal circular steel tubes. However, the behavior of circular CFDST short columns that are loaded eccentrically has not been ...

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Compressive behavior of post-heated circular CFST short ...

This paper presents the results of an experimental investigation on the compressive behavior of the post-heated circular CFST short columns externally strengthened with CFRP sheets. A total of twenty-one specimens are tested to investigate the influence of temperature and the number of CFRP layers on the mechanical behavior of repaired specimens.

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Sustainable FRP–recycled aggregate concrete–steel composite ...

Nov 01, 2017 · T. Ozbakkaloglu, B.A. Louk Fanggi, J. ZhengConfinement model for concrete in circular and square FRP–concrete–steel double-skin composite columns Mater. Des., 96 (2016), pp. 458-469

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Behavior of Reinforced Concrete Hollow Circular Columns With ...

circular columns , and if it can be used to replace a portion of the lateral hoops . For each lateral reinforcement ratio there was two specimens one conventional RC column and the other with addition of steel fibers . Fig. 1 Reinforcement details for hollow circular column 1200 mm spacing hoops @ spacing = S (from design)

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Behavior of circular thin-walled steel tube confined concrete ...

The steel ratio of the circular STCC columns were defined in range of 0.5% to 2% to analyze the composite action between steel tube and concrete, and make a further study on the advantages of the circular STCC columns.

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