Bissoy.com
Doctors Medicines MCQs Q&A

How is the deflection in RC beams controlled as per IS:456

How is the deflection in RC beams controlled as per IS:456 Correct Answer By controlling span to depth ratio

Article 23.2 of IS 456:2000 clearly states that the control of deflection is governed by suitable A values which is span to effective depth ratios. To further decrease the depth of beam further suitable modification factors are also given which depends on the percentage of tension reinforcement provided and grade of steel.

Related Questions

In comparing the operation of the half-controlled 2-pulse circuit with that of the fully-controlled circuit, which of the following statements are evident? 1. Since half the thyristors are replaced by diodes, a half-controlled converter costs less than a fully-controlled converter. 2. Due to the freewheeling action with a half-controlled bridge-circuit power factor is improved in half-controlled converters. 3. The AC supply current is more distorted due to its zero periods with the half-controlled circuit, compared to a fully-controlled bridge circuit. Select the correct answer using the code given below :
A lady wants to buy the following items in the given price range- 1. Tomato between Rs. 40 and Rs. 45 per kg. 2. Grapes in the price range of Rs. 80 and Rs. 90 per kg. 3. Milk packets at Rs. 23 per liter. In which shop from the following will she definitely get all her items/ A. Shop S sells tomato at Rs. 22.5 per half kg, Grapes at Rs. 82 per kg and milk at Rs. 24 per liter. B. Shop H sells grapes at Rs. 21 per quarter kg, milk at 12.5 per half litre and tomato at Rs. 22 per half kg. C. Shop O sells milk at Rs. 11.5 per half litre, tomato at 21 per half kg and grapes at Rs. 43 per half kg. D. Shop P sells tomato at Rs. 23.5 per half kg, grapes at Rs. 85 per kg and milk at Rs. 23 per litre.
Consider the following statements in connection with deflection-type and null-type instruments: 1. Null-type instruments are more accurate than the deflection-type ones. 2. Null-type of instrument can be highly sensitive compared to a deflection-type instrument. 3. Under dynamic conditions, null-type instruments are less preferred to deflection-type instruments. 4. Response is faster in null-type instruments as compared to deflection-type instruments. Which of the above statements are correct?
Consider the following statements : Moment Area Method proves advantageous in analyzing 1. cantilever beams. 2. symmetrically loaded simply supported beams. 3. fixed beams. 4. continuous beams. Which of the above statements are correct?
Consider the following statements for deflection and null type instruments: 1. Deflection type of instruments are more accurate than null type of instruments. 2. Deflection type of instruments can be highly sensitive as compared with the null type of instruments. 3. Null type of instruments are more suitable for measurements under dynamic conditions than deflection type of instruments. Which of the above statements are not correct?
As per IS456-2000, what is the recommended length of column fixed at one end and hinged at other end?
A spring controlled indicating instrument has a deflection of 90° for maximum current I. The corresponding deflection for a gravity controlled instrument is
In the following question the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. 1. Security inks misuse a similar rule that causes the clear and always showing signs of changing shades of a film of oil on water. P. At the point when two beams of light meet each other in the wake of being reflected from these distinctive surfaces, they have each travelled somewhat extraordinary distances. Q. The key is that the light is bouncing off two surfaces, that of the oil and that of the water layer beneath it. R. The separation the two beams travel figures out which wavelengths, and thus, meddle productively and look brilliant. S. Since light is an electromagnetic wave, the pinnacles and troughs of each beam at that point meddle either usefully, to seem brilliant, or dangerously, to seem diminish. 6. Since the separation the beams travel changes with the point as you take a look at the surface, diverse hues look splendid from changed review edges.
Two beams PQ (fixed at P and with a roller support at Q, as shown in Figure I, which allows vertical movement) and XZ (with a hinge at Y) are shown in the Figures I and II respectively. The spans of PQ and XZ are L and 2L respectively. Both the beams are under the action of uniformly distributed load (W) and have the same flexural stiffness, EI (where, E and I respectively denote modulus of elasticity and moment of inertia about axis of bending). Let the maximum deflection and maximum rotation be δmax1 and θmax1, respectively, in the case of beam PQ and the corresponding quantities for the beam XZ be δmax2 and θmax2, respectively. Which one of the following relationships is true?
There are two beams of equal length L and a load P is acting on centre of both beams. One of them is simply supported at both ends while the other one is fixed at both ends. Deflection of centre of simply supported beam will be __________ times that of defection of centre of fixed beam.