Behavior of Circular Concrete Columns Repaired with Steel

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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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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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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Circular and Square Concrete Columns Externally ... - Hal

2013年1月29日 — Reinforced Polymers - The Technology Applied for Concrete Repair, INTECH, ... of the FRP composite for circular concrete columns is shown in Figure 1. ... to the stress-strain behaviour of steel, which after the initial linearly ...

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Behavior of Damaged Concrete Columns Repaired with ...

Moreover, the jacket effectively restored the axial load capacity of columns with 50% and 100% concrete cover damage by 95% and 82%, respectively. The proposed system was more effective in circular columns because the axial load capacity of the repaired columns was 43% higher than the square columns.

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Structural Behavior of GFRP-Reinforced Circular HFRC ...

Aug 31, 2020 · The previous research is rich in plain concrete columns reinforced with glass fiber-reinforced polymer (GFRP) bars, but it is deficient in GFRP-reinforced concrete columns incorporating hybrid fibers. The present study aims to explore and compare the structural behavior of steel and GFRP-reinforced concrete columns having hybrid fibers (SHFC and GHFC columns).

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SEISMIC BEHAVIOR AND ASSESSMENT OF CIRCULAR …

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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[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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SEISMIC BEHAVIOR OF CIRCULAR CONFINED CONCRETE …

SEISMIC BEHAVIOR OF CIRCULAR CONFINED CONCRETE COLUMNS S. A. Sheikh1 and J. Liu2 ABSTRACT This paper reports on seismic behaviour of circular steel-confined concrete columns and the upgrade of deficient columns with fibre reinforced polymers (FRP). Relevant seismic performance data from tests on 15 near full-scale columns is presented.

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Behavior of circular tubed-RC column to RC beam ...

The circular tubed-reinforced concrete (TRC) column is a kind of special concrete-filled steel tube (CFST) columns, in which the outer thin-walled steel tube does not pass through the beam-column joint and thus can avoid the direct transfer of an axial load and maximize the confinement effect from the steel tube.

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behavior, strength and flexural stiffness of circular concrete ...

steel counterparts, and achieved almost the same nominal axial forces. Specimens with GFRP ... Hadhood, A. “Behavior of circular concrete columns reinforced with FRP bars under eccentric ... While repair is not always an option, some cases.

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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 large-scale connections between circular ...

Three large-scale connections between circular concrete-filled steel tubular columns and H-section steel beams were tested. The specimens include one connection with T-shaped stiffeners under static load and two connections, respectively, with T-shaped stiffeners and diaphragms (including interior and exterior diaphragms) under cyclic loads.

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Axial behaviour of slender concrete-filled steel tube square ...

2019年11月16日 — Axial behaviour of slender concrete-filled steel tube square columns strengthened ... and repair of reinforced concrete beams using external steel plates. ... for circular concrete filled steel tubular column under acid rain attack.

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Influence of concrete strength on the behavior of steel ...

circular steel columns filled by high strength concrete in case of structural members subjected to compression. The paper was worked out within the research programme focused on true behavior of steel tubular columns filled by concrete. Attention is focused on influence investigation of concrete strength on the behavior of columns. The

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Structural Columns & Piers: Inspection for Defects

Watch out: The collapse of a structural steel column is increased if the column is hollow, rather than concrete-filled. Thin-walled Steel Adjustable Teleposts - Maybe Not the Best Choice for Permanent Repairs However what you see in the photographs above is a temporary repair. The rusted steel column should be replaced with a structural column ...

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‪Wan-Yang Gao‬ - ‪Google 學術搜尋‬ - Google Scholar

Effect of temperature variation on the full-range behavior of FRP-to-concrete bonded ... Stress-Strain Behavior of Circular Concrete Columns Partially Wrapped with ... and Debonding Failures of Full-Scale CFRP-Strengthened H-Section Steel Beams ... Repair of fire-damaged RC slabs with basalt fabric-reinforced shotcrete.

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Axial behavior of slender RC square columns strengthened ...

The authors have previously investigated the behavior of circular RC columns enlarged with circular hybrid jackets and square RC columns enlarged with square hybrid jackets , , . However, the strengthening of slender RC square columns with circular steel tube and sandwiched concrete jacketing is not investigated.

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Study of seismic behavior of recycled aggregate concrete ...

Sep 01, 2018 · The seismic behavior of recycled concrete-filled steel tube columns is analyzed. • Finite element method is applied for parameter study. • A restoring force model based on simulation results is proposed. • The recycled aggregate concrete columns can be effectively used in load-bearing structures.

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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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