Effect of Tensile Reinforcement Ratio on the Effective Moment of Inertia of Reinforced Lightweight Concrete Beams for Short Term Deflection Calculation

Akmaluddin, Akmaluddin

doi:10.5614/itbj.eng.sci.2011.43.3.4

Cited by 10 publications

(7 citation statements)

References 9 publications

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“…Once this load is achieved the beam lost its strength and the curve starts to decrease and the test was stopped. This sandwich beam behavior is identical to the behavior of lightweight concrete beams that had been studied earlier by the author [10].…”

Section: Resultssupporting

confidence: 81%

Structural Behavior of Steel Reinforced Sandwich Concrete Beam with Pumice Lightweight Concrete Core

Akmaluddin

Murtiadi

Gazalba

2016

AMM

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This study is aimed to discuss structural behavior of steel reinforced sandwich concrete beams (SWB) consisted of skins and a core. The skins were made of ordinary concrete and a core was of pumice lightweight concrete. The SWB skin compressive strengths of 30 MPa and the core compressive strength of 15 MPa were considered. Twelve SWB specimen of 150x250x2500 mm with 50 mm skin thickness and 150 mm core thickness were cast and tested after curing process under flexural points loading as simply supported beams. All the beams considered were reinforced with 3D12 mm deformed bar and 8 mm stirrups with 3 spacing variations. Shear span depth ratio (a/d) of 1.8, 2.3, 2.8, and 5.4 were also considered to reflect the behavior between short and slender beams. Results showed that the flexural behavior of sandwich beams were identical with normal or lightweight concrete beams behavior. Ultimate moment of beam section slightly increased with increasing the shear span to depth ratio, which were varies between 1.26 and 2.31 of the calculated moment. The yield moment to the ultimate moment ratio vary between 0.83 and 0.99. The ductility was increased with the decreased shear reinforcement spacing. The shear strength increased as the spacing of shear reinforcement decreases in almost all a/d variations. Shear strength was also increased with the increase of a/d ratio for short beam and the other hand shear strength decreased with the increasing a/d.

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Section: Resultssupporting

confidence: 81%

Structural Behavior of Steel Reinforced Sandwich Concrete Beam with Pumice Lightweight Concrete Core

Akmaluddin

Murtiadi

Gazalba

2016

AMM

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“…However, from the flexural test point of view, the graph relationship between RS and deflection show that 60% RS is acceptable to consider a structure as "good". At this point, the deflection is about 1.1 mm which is still far away from the allowable deflection of 2.77 mm taken from L/360 where L is an effective span of the beam specimen [14]. It can be seen from the table that interpretation of the structural condition based on both compression and flexural tests lies within the range of v given in the Reference [10].…”

Section: Structure Representationmentioning

confidence: 69%

Application of NDT apparatus for possible use as structural health monitoring of concrete building in the field

2018

Self Cite

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Abstract.A condition assessment of reinforced concrete building structures can be conducted accurately when the components of the building structure data are available. Otherwise, data must be developed through testing directly in the field. Non-Destructive Test method (NDT) was considered to avoid disruptions to the existing building structures. This study aims to develop a model for interpreting the residual strength of concrete structures in the field. Nine cylinder specimens with a diameter of 150 mm and a height of 300 mm and 27 cube specimens of 200x200x200 mm were prepared. Nine reinforced concrete beam specimens of 100x150x1100 mm were also prepared to represent a component of the reinforced concrete structure. Hammer and UPV apparatuses were applied to the cylinder and cube specimens considered. Results concluded that the value of the pulse velocity is directly proportional to the load and inversely proportional to the residual strength. The concrete structure with a residual strength of more than 60% is considered healthy or a structural in "good" condition. The concrete structure is also healthy when the v measured gives a value of 3.5 and above. This value is acceptable as it lies within the range v given in the reference of 3.5 to 4.5.

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“…Several parameters as slab thickness, span length and floor panel aspect ratio are taken into consideration. Akmaluddin [13] presented an improvement model of the effective moment of inertia to predict to predict the short term deflection of reinforced light weight concrete beam. The proposed model is verified and compared with experimental results of nine beams, good agreement is obtained with the experimental results and in some cases have similar trend to the ACI and SNI previsions.…”

Section: Support Type One Way Slab Beammentioning

confidence: 99%

Modified Minimum depth-span ratio of beams and slabs

2020

IJETER

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The deflection control and determining of minimum thickness of slabs and beams are included in different buckling codes and standards, also the ACI Code includes provisions of determining immediate and time dependent deflection and depth-span limitations which is tabulated for normal weight concrete and specified yield strength of steel reinforcement and correction factors are provided for other values of steel reinforcement and light weight concrete. Correction factors are suggested in this study to include the effect of concrete strength and steel reinforcement yield strength on the ACI Code limitation factors of the depth-span ratio of beams and slabs with different boundary conditions;(simply supported, fixed ended, propped and cantilevers).

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Effect of Tensile Reinforcement Ratio on the Effective Moment of Inertia of Reinforced Lightweight Concrete Beams for Short Term Deflection Calculation

Cited by 10 publications

References 9 publications

Structural Behavior of Steel Reinforced Sandwich Concrete Beam with Pumice Lightweight Concrete Core

Structural Behavior of Steel Reinforced Sandwich Concrete Beam with Pumice Lightweight Concrete Core

Application of NDT apparatus for possible use as structural health monitoring of concrete building in the field

Modified Minimum depth-span ratio of beams and slabs

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