Effects of Opening on the Behavior of Reinforced Concrete Beam

Hafiz, Rezwana Binte; Ahmed, Shaibal; Barua, Saikat; Chowdhury, Sharmin Reza

doi:10.9790/1684-11275261

Cited by 20 publications

(12 citation statements)

References 2 publications

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“…Beam openings may be of several shapes, sizes and are generally located close to the supports where shear is dominant. Practically, it is quite often employ to provide convenient passage of environmental services such as a network of pipes and ducts which reduce the story heights of buildings and weight of construction as it progresses the demand on the supporting frame both under gravity loading and seismic excitation which results in an economical design [9].…”

Section: Introductionmentioning

confidence: 99%

Energy Absorption Capacity Of Layered Lightweight Reinforced Concrete Beams With Openings In Web

Jomaa’h

Ghaidan

2019

Civ Eng J

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This research presents the flexural behavior on reinforced concrete beam with transverse web opening constructed from layered concrete. The layered concrete combining normal concrete and lightweight aggregate concrete (LWC) are depended in present study. In the experimental program, 13 models of normal and layered reinforced concrete beams are tested under the effect of four-point loads. All beams had the same overall geometrical dimensions and main longitudinal top and bottom with internal diagonal reinforcement provided around the openings. One of the beam specimen is tested as control beam and the other specimens are divided into three groups [G1, G2, and G3] to study the effects of the following variables: effect of presence of web openings, layered system, lightweight aggregate (partially volumetric replacement of normal aggregate by thermostone) on the ultimate load, cracking load, cracking pattern and energy absorption capacity. The existing of an opening in beam specimens reduced the flexural capacity of beams with a percentage depending on the size of opening and opening number. The test data obtained from the adopted layered technique of (NEW) and (LWC) have shown that for beams constructed from two layered concrete (LWC with thermostone in the web and bottom flange of I-beam section) ultimate load is decreased about (9.3%-48.8%). It has also, the beams constructed from three-layered of concrete (LWC with thermostone in the web of I-beam section), their ultimate load is decreased about (25.6%-58.1%). On the other hand, magnitude increased of energy absorption capacity are achieved by the decreased opening size, introducing the full size opening of dimension (100×1000) mm reduces the energy absorption capacity of the RC I-section beams at least 80% compared to solid beam while the beam with opening size (100×100) mm decrease up to 16%. In the case of the layered concrete beams specimen, the real influence of lightweight concrete (LWC) type in the layered reinforced concrete is observed significantly after increasing the length of opening more than 100 mm.

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Section: Introductionmentioning

confidence: 99%

Energy Absorption Capacity Of Layered Lightweight Reinforced Concrete Beams With Openings In Web

Jomaa’h

Ghaidan

2019

Civ Eng J

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“…Numerical and experimental results are obtained with respect to torsional strengthening of solid and hollow RC beams, and the ultimate strength, cracking obtained was 77% and 41% with CFRP [7]. A study was carried out by [9] without special reinforcement on the opening zone the effects of reinforced concrete beams was studied. There was no effect on the ultimate load capacity when the depth of beam (D) was less than 44% with circular openings in the reinforced rectangular beams.…”

Section: Introductionmentioning

confidence: 99%

Hollow Beams Strengthened with Steel Fibres and FRP Wrapping

Jeyakumar.¹,

M.S²,

N³

2019

IJRTE

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In the field of construction hollow sections have found wide application due to its advantageous properties. Many research works have been conducted to study the flexural and tensional behaviour of hollow reinforced concrete beams. But its behaviour using High-Performance Concrete (HPC) has been poorly noticed. In this study an attempt made to evaluate Hollow reinforced beams made with HPC and reinforced with hybrid steel fibres. The flexural behaviour of hollow beams based on the effect of Carbon fibre reinforced polymer (CFRP) has also been explored. A comparison is made between the results obtained from analysis using ANSYS software with the experimental test result. It is noticeable that the flexural strength, its ductility, and stiffness is not affected but the self-weight of the structure is reduced due to hollow beams.

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“…With circular web openings of diameter less than (44%) of beam depth (D) had exerted no effect on the ultimate load capacity; nevertheless, circular openings with a diameter greater than (44%) of (D) reduced the ultimate load capacity by at least (34.29%). Their team also realized that the circular opening exhibits more strength than the equivalent square opening, with a variation of (9.58%) in ultimate load [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study to Investigate the effect of Longitudinal and Transverse Openings on the Structural Behavior of High Strength Self Compacting Reinforced Concrete Beams

Abtan¹,

AbdulJabbar²

2019

JEASD

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Service runs considered as a major nerve of any building. Thus, beam with longitudinal and transverse opening (BLTO) was creative solution for the purpose of serve those runs with other benefits, especially when utilized high strength self-compacting concrete (HS-SCC). This study examined the behavior of eight reinforced concrete (RC) beams. These beams were involved into two groups. All beams had identical in dimensions, reinforcement, concrete type, and hole dimensions. The evaluation used to elect the optimum hollow core section, and position effect of web openings with fixed hollow core section. Due to recorded load capacity, a reduction was produced by hollow core position at mid and bottom section by about (2%-14%), respectively, with comparing by solid section. Therefore, the optimum hollow core section was when it locate in mid beam section which used to unify BLTO sections. BLTO types indicated different loading data according to web opening position. The decrement of opening provision was about (20.4%) by compared with hollow beam (without transverse opening) and about (22%) by compared with the solid beam. The optimum BLTO was when the web opening located in mid-shear zone, while the critical one recorded in web opening position in mid-span and near supports in same BLTO. The registered failure mode of all beams was contained two main types, suddenly flexural failure in compressive zone by concrete cover crushing and flexural-shear failure.

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Effects of Opening on the Behavior of Reinforced Concrete Beam

Cited by 20 publications

References 2 publications

Energy Absorption Capacity Of Layered Lightweight Reinforced Concrete Beams With Openings In Web

Energy Absorption Capacity Of Layered Lightweight Reinforced Concrete Beams With Openings In Web

Hollow Beams Strengthened with Steel Fibres and FRP Wrapping

Experimental Study to Investigate the effect of Longitudinal and Transverse Openings on the Structural Behavior of High Strength Self Compacting Reinforced Concrete Beams

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