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RCD
TERMS
| Question | Answer |
|---|---|
| It is the contact pressure between the separate bodies | Bearing stress |
| The shear strength vc of a normal weight beam cross section, given concrete strength fc', width of beam bee and effective depth d is: | 0.17 √fc'bd |
| It is the ratio of change in length caused by the applied force, to the original strength. | Strain |
| It is the condition in which concrete reaches its full comprehensive strength when the steel reaches its yield strength. | Over reinforced |
| The strain is still below yield point. | Fs/Es |
| For slab with bond and continuous. The minimum thickness of non-pressed slab unless deflections are computed is. | L/24 |
| An admixture used to slow the setting of concrete | Retarding add mixture |
| For a simply supported slab. The minimum thickness of non-pressed lab unless deflection are computed is | L/20 |
| Components of concrete that occupies about 3/4 of its volume | Aggregates |
| Strength of a member or cross section before application of any strength reduction factors. | Nominal |
| Bundled bars for concrete is allowable only for bar with a diameter or not greater than | 50 mm |
| Loads that may change in position and magnitude | Live load |
| Reinforcement used to resist shear and torsion stresses in a structural member. | Stirrups |
| Continuously wound reinforcement in the form of cylindrical helix. | Spiral |
| For a singly reinforced rectangular beam of weed b (mm) and effective depth d(mm, the ultimate moment in Nmm, Mu=Φfc'bd²w(1-0.59w) the unit for fc' and fy is | Mn/m² |
| It is required to hold the concrete in place until it hardens sufficiently. | Forms |
| The modulus of rapture of concrete is given by | 0.5√fc' |
| Minimum number of longitudinal bars for a spiral column | 4 |
| Point on the stress strain diagram where there is appreciatable deformation on material even without additional load | Yield point |
| Materials added to concrete during or before mixing | Admixtures |
| Loop of reinforcing bar or wire enclosing longitudinal reinforcement | Ties |
| What is the minimum diameter of stirrups if the main bar reinforcement is 35 mm | 8 |
| What is the maximum strain of concrete | 0.002 |
| β1 is equal 0.85 - 0.008 (fc'-28) but should not be less than what value if fc' is greater than | 28 mpa |
| These are load of constant magnitude that remain in one position | Dead load |
| Bars that are used in a range of residential, commercial and infrastructure application from concrete slab to prefabricate beam, columns, cages and precast product | Deformed |
| For beams with one and continuous, the minimum thickness of non-pressed beam unless deflections are computed is | L/18.5 |
| It is a mixture of sand, gravel, crash rock or other aggregates held together in a rock line must with a piece of cement and water | Plain concrete |
| The most important code in the united states for enforced concrete design | ACI |
| The value of strength reduction factor for the design of flexural member if under tension controlled | 0.90 |
| A bar subjected to forces or couples that lie in a plane containing the longitudinal section of the bar | Beam |
| At any section of flexural member were positive reinforcement is required by analysis, the ratio of steel area with the area of concrete shall not be less than by | 1.4/fy |
| These are additional deformation under sustained loads | Creep |
| The area of web reinforcement for a closed stirrups | 0.02Av |
| In the competition of deflection, for all light weight concrete, the modification factor λ is | 0.85 |
| The strain in steel @ yield point | fy/Es |
| Minimum number of longitudinal bars for a tide column | 4 |
| According to the ACI code, for symmetrical t beam the effective weed be shall not exceed ____ of the span length of the beam | 1/4 |
| It is required to hold the concrete in place until it happens sufficiently | Form |
| It is condition in concrete design in which the concrete reaches its full compressive strength and the steel has not yet yielded | Over reinforced |
| It is the ratio of the modulus of elasticity of steel over the module of elasticity of concrete | Modular ratio |
| Bars that is used in range of residential commercial and infrastructure application from concrete slab to fabricated beams columns cages and precast product | Deformed |
| It is occupies about 3/4 of the volume of concrete | Aggregates |
| These are loads of constant magnitude that remain in one position | Dead load |
| What is the modulus of elasticity of steel | 200 gpa |
| It is the method of design of reinforced concrete that is based on the modular ratio of materials | Working stress design |
| Additional deformation under sustained loads | Creep |
| An admixture used to slow the setting off the concrete and to retard temperature increases | Retarder |
| As per ACI code the capacity reduction factor of concrete members according to type of stress for shear is | 0.75 |
| Allowable stress of concrete in wsd | 0.45fc' |
| It is required to hold the concrete in place until it happens sufficiently | Form |
| What is the modulus of elasticity of steel | 200GPa |
| The maximum number of bars that can be bundled | 4 |
| Which of the following states that within proportional limit the stress is directly proportional to strain | Hooke's law |
| Maximum bar diameter that can be bundled | 32 mm |
| Modulus of elasticity of concrete in english unit | 57000√fc' |
| Additional deformation under sustained loads | Creep |
| If fs is greater than fy what will be the condition | Steel will yield |
Created by:
lelou_lampe