Concrete-structures Questions Set 24:
What is the approximate shrinkage strain in concrete?
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Which ratio is used to control the deflection in slabs?
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What percentage of the design shear must the bent-up bars take while providing the shear reinforcement?
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A column is regarded as a long column if the ratio of its effective length and lateral dimension exceeds:
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According to IS 456-2000, what is the maximum shear stress for concrete grades above M40?
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A reinforced concrete column of size 400 mm × 400 mm has longitudinal bars with a diameter of 20 mm. What should be the pitch of the lateral ties in this case?
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In LSM (Limit State Method) for Reinforced Cement Concrete (RCC), deflection is computed by using
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IS 1343: 1980 limits the minimum characteristic strength of prestressed concrete for post tensioned work and pretension work as
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As per IS: 456 2000 for M20 grade concrete and plain bars in tension the design bond stress τbd = 1.2 MPa. Further, IS 456:2000 permits this design bond stress value to be increased by 60% for HYSD bars. The stress in the HYSD bars reinforcing steel bars in tension, ϭs = 360 MPa. Find the required development length, Ld, for HYSD bars in terms of the bar diameter (to the nearest one decimal place), Φ______.
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An RCC beam of rectangular cross section has factored shear of 200 kN at its critical section. Its width b is 250 mm and effective depth d is 350 mm. Assume design shear strength τc of concrete as 0.62 N/mm2 and maximum allowable shear stress τc,max in concrete as 2.8 N/mm2. If the two-legged 10 mm diameter vertical stirrups of Fe 250 grade steel are used, then the required spacing (in cm, up to one decimal place) as per limit state method will be____.
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