Behavior of Circular Concrete Columns Repaired with Steel

Behavior of Circular Concrete Columns Repaired with Steel


Experimental Behavior of Concrete-Filled Steel Tube

Sep 09, 2016 · Concrete-filled steel tube (CFT) columns offer significant advantages over columns made of either steel or concrete alone, such as large energy dissipation and increased strength and stiffness. To further improve the seismic performance of these columns, an experimental investigation was conducted into CFT columns using ultrahigh-strength steel.

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Simplified damage models for circular section reinforced concrete

2020年5月27日 ... Seismic behavior of circular fly ash concrete columns reinforced with low-bond high-strength steel rebar ... Behavior of heat damaged circular reinforced concrete columns repaired using Carbon Fiber Reinforced Polymer rope.

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Severely Damaged Reinforced Concrete Circular Columns

Severely Damaged Reinforced Concrete Circular Columns Repaired by Turned Steel Rebar and High-Performance Concrete Jacketing with Steel or Polymer Fibers Article in Applied Sciences 8(9):1671 ...

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Chapter 9: Column Analysis and Design

Columns are defined by the length between support ends. • Short columns (e.g. footing piers). • Long columns (e.g. bridge and freeway piers). Virtually every common construction material is used for column construction. • Steel, timber, concrete (reinforced and pre-stressed), and masonry (brick, block, and stone).

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Behaviour of circular SMA-confined reinforced concrete

Repair and strengthening strategies of concrete columns are crucial to ... steel bars and laterally reinforced with 6 mm diameter circular steel ties spaced at 100 ...

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Retrofitting Existing Concrete elements by Method of Jacketing

2.Reinforced Concrete Jacketing. jacketing with high strength material like anchoring adhesive. 3.Steel Jacketing. jacketing with materiasl like steel plate and structural strengthening epoxy . The main purposes of jacketing are: 1.To increase concrete confinement by transverse fiber reinforcement, especially for circular cross-section columns.

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Circular and Square Concrete Columns Externally Confined

The confining action of the FRP composite for circular concrete columns is ... Different behaviour between steel and FRP composite was observed due to the ... for Concrete Repair, Martin Alberto Masuelli, IntechOpen, DOI: 10.5772/51589.

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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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Nonlinear inelastic behavior of circular concrete-filled

Patel, V. Ishvarbhai., Liang, Q. & Hadi, M. N. (2012). Nonlinear Inelastic Behavior of Circular Concrete-Filled Steel Tubular Slender Beam-Columns with Preload Effects. In J. Liew & S. Lee (Eds.), Proceeding of the 10th International Conference on Advances in steel concrete composite and hybid structures (pp. 395-402). Singapore: Research ...

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Experimental Study and Confinement Analysis on RC Stub

Apr 26, 2018 · As the excellent mechanical performance and easy construction of concrete filled steel tubes (CFST) composite structure, it has the potential to be used to strengthen RC pier columns. Therefore, tests were conducted on 2 reinforcement concrete (RC) stub columns and 9 RC columns strengthened with circular CFST under axial loading. The test results show that the circular CFST …

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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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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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Axial Strength of Eccentrically Loaded FRP-Confined Short

31 May 2020 ... Various models for concrete columns strengthened with FRPs under concentric ... affects the confinement behavior of FRP jacketed concrete columns [28,29 ... to the load eccentricity on FRP-confined square and circular short concrete. ... The effect of the corner radius ratio ρ and the steel molds for concrete ...

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Experimental Investigation on Interfacial Defect Criticality of

2019年1月24日 — detected defects by NDTs and repair schemes is needed by ... In this study, FRP confined concrete columns with interfacial defects were ... the prediction of stress–strain behavior of FRP confined columns. ... linear variable differential transformers (LVDTs) were arranged surrounding the circular sample.

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Behavior of concrete columns reinforced with high-strength

In this study, high-strength steel (HSS) reinforcement with a yield stress of about 600 MPa was used in reinforced concrete columns to reduce both the reinforcing bar congestion and the construction costs. For this purpose, 16 square concrete columns reinforced with either the conventional normal-strength steel (NSS) or HSS rebars were subjected to axial and eccentric compression loads.

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Earthquake Repair of Circular Reinforced Concrete Columns

29 May 2012 ... This session will focus on case histories of rapid repair projects, challenges facing owners with a damaged structure, and the repairs required ...

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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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Compressive Behavior of Circular Concrete Columns Confined by

For this purpose, 8 small scale circular concrete specimens with no internal steel reinforcement were tested under monotonic axial compression to failure. The results of BFRP-confined concrete specimens of this study showed a bilinear stress-strain response with two ascending branches.

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PDF, Behaviour of Post Heated Reinforced Concrete Columns

properties of steel reinforcement bar embedded would be reduced. ... 44% of their compressive strength after heating and circular columns lost 42% of their ... repairing the fire damaged concrete structures, it is very important to consider ...

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BEHAVIOUR OF CIRCULAR CONCRETE COLUMNS INTERNALLY

Table 2-4 Results on steel reinforced circular columns (Liu, 2013) . ... Table 3-4 Mechanical properties of Emaco® S88 CI repair mortar (BASF, 2011) .

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Behavior of corroded circular RC columns strengthened by C

This study presents an experimental investigation on the seismic behavior of corroded reinforced concrete (RC) columns strengthened by carbon-fabric reinforced cementitious matrix (C-FRCM). To this end, cyclic loading tests were conducted on seven circular RC columns, six of which were suffered from corrosion with duration of 360 days.

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Behavior of Circular CFST Columns with Central Wood Piece under

9 Apr 2019 ... identify the behavior of concrete-filled steel tubular column. (CFST) columns. ... Materials used are concrete, steel, and circular tubular columns. ... include Composite Structures, Repair and strengthening of concrete structures ...

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Nonlinear Finite-Element Analysis for Hysteretic Behavior

The above thin-walled steel columns filled with concrete are referred here to as thin-walled CFT columns. Up to the present, no sufficient and precise research has been conducted on the versatile finite-element model (FE model) analysis that can take into account the upgrading mechanism of thin-walled CFT columns in a direct manner.

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STRESS-STRAIN RELATION AND NONLINEAR BEHAVIOR OF CIRCULAR

column section, the effective confined region is around the circular confining steel or spiral as shown in Fig. 1. Fig. 1 also shows the effective region in a concrete core of a circular column section. The effect of confinement in a reinforced concrete column can be considerably increased if:

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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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Seismic behavior of circular reinforced concrete bridge

Shanmugam, Suriya Prakash, "Seismic behavior of circular reinforced concrete bridge columns under combined loading including torsion" (2009). Doctoral Dissertations. 1998.

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Experimental analysis of eccentrically loaded reinforced concrete

20 May 2019 ... ... as shear connectors in circular concrete-filled tube columns · author ... Several causes can lead to a reinforced concrete column failure: ... steel reinforcement, is a common technique for structural repair and rehabilitation used in Brazil. ... This work aims to study the behavior of retrofitted columns when ...

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Behavior of circular thin-walled steel tube confined

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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Repair of corroded and buckled short steel columns using concrete

Repair of corroded and buckled short steel columns using concrete-filled. GFRP jackets ... consist of a circular steel inner tube and a circular or square bi-directional CFRP outer ... Previous studies have focused on evaluating the behavior of.

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Cyclic Experimental Behavior of CFST Column to Steel Beam

This paper aims to investigate the seismic behavior of blind bolted end plate composite frames between square or circular concrete filled steel tubular (CFST) columns and steel beams. Two composite frames were tested under a constant axial load on the CFST columns and a lateral cyclic load on the frame. Each specimen composed of CFST columns and steel beams was selected to represent a plan ...

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New SMA Confinement Technology for RC Bridge Columns

to enhance the seismic behavior of reinforced concrete (RC) bridge columns. ... Internal transverse steel reinforcement, for new structures, external steel ... applying SMA confinement to non-circular concrete columns and proved its superiority in ... confinement as emergency repair measure for severely damaged concrete ...

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Concrete Column Repair Procedure" by ContractorBhai.com

"Concrete Column Repair Procedure" by ContractorBhai.com Get Free Home Renovation Estimate here: http://contractorbhai.com/ --- Our contractor explaining ho...

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Severely Damaged Reinforced Concrete Circular Columns ... - MDPI

15 Sep 2018 ... Columns Repaired by Turned Steel Rebar and ... observe the softening beam behavior, usually recorded for concrete with polymer fibers.

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Experimental Evaluation of Axial Behavior of Strengthened Circular

15 Jun 2010 ... A thin steel jacket encasing an existing column confines concrete and ... the behavior of retrofitted and repaired concrete-jacketed columns.

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PDF] Structural behaviour of recycled aggregate concrete

Abstract This paper presents experimental research on structural behaviour of normal and recycled aggregate concrete filled steel tube (RACFT) columns externally strengthened with carbon fibre reinforced polymer (CFRP) sheets and subjected to axial loading. A total of 22 specimens were tested to investigate the influence of the following variables: (1) tube configurations, circular or square ...

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