Question 12.P.8: Repeat P.12.5 using ultimate load theory and take σcu = 22.5...

Structural and Stress Analysis

Repeat P.12.5 using ultimate load theory and take $\sigma_{cu}$ = 22.5 N/mm², $\sigma_{Y}$ = 250 N/mm².

The blue check mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.

Related Answered Questions

Question: 12.P.11

If the concrete in the composite beam in P.12.10 has a reduced strength of 15 N/mm² determine its resulting moment of resistance. ...

Verified Answer:

The available compressive force in the concrete is...

Question: 12.P.10

A concrete slab 175 mm thick and 2 m wide is supported by, and firmly connected to, a 457 mm × 152 mm × 74 kg/m Universal Beam whose actual depth is 461.3 mm and whose cross-sectional area is 9490 mm². If σcu = 30 N/mm² and σY = 350 N/mm², find the moment of resistance of the resultant steel and ...

Verified Answer:

Equating the compressive force in the concrete to ...

Question: 12.P.9

Repeat P.12.6 using ultimate load theory. Assume σcu = 25.5 N/mm² and σY = 280 N/mm². ...

Verified Answer:

From S.12.6,

M_{\max }

= 189 kN m. ...

Question: 12.P.7

Repeat P.12.4 using ultimate load theory assuming σcu = 24 N/mm² and σY = 280 N/mm². ...

Verified Answer:

The maximum bending moment is

M_{\max }=\fr...

Question: 12.P.6

A reinforced concrete T-beam is required to carry a uniformly distributed load of 42 kN/m on a simply supported span of 6 m. The slab is 125 mm thick, the rib is 250 mm wide and the effective depth to the tensile reinforcement is 550 mm. The working stresses are 8.5 N/ mm² in the concrete and ...

Verified Answer:

Assume that the neutral axis is at the base of the...

Question: 12.P.5

A reinforced concrete beam is of rectangular section 300 mm wide by 775 mm deep. It has five 25 mm diameter bars as tensile reinforcement in one layer with 25 mm cover and three 25 mm diameter bars as compression reinforcement, also in one layer with 25 mm cover. Find the moment of resistance of ...

Verified Answer:

The area of the compression steel is 3 × π × 25²/4...

Question: 12.P.4

A singly reinforced rectangular concrete beam of effective span 4.5 m is required to carry a uniformly distributed load of 16.8 kN/m. The overall depth, D, is to be twice the breadth and the centre of the steel is to be at 0.1D from the underside of the beam. Using elastic theory find the ...

Verified Answer:

From Eq. (12.13)

\sigma_{\mathrm{s}}=-\sigm...

Question: 12.P.3

A timber beam 150 mm wide by 300 mm deep is reinforced by a steel plate 150 mm wide and 12 mm thick which is securely attached to its lower surface. Determine the percentage increase in the moment of resistance of the beam produced by the steel-reinforcing plate. The allowable stress in the timber ...

Verified Answer:

The maximum stress in the timber beam is given by ...

Question: 12.P.2

A simply supported beam of span 3.5 m carries a uniformly distributed load of 46.5 kN/m. The beam has the box section shown in Fig. P.12.2. Determine the required thickness of the steel plates if the allowable stresses are 124 N/mm² for the steel and 8 N/mm² for the timber. The modular ratio of ...

Verified Answer:

The maximum bending moment is

M_{\max }=\fr...

Question: 12.P.1

A timber beam 200 mm wide by 300 mm deep is reinforced on its top and bottom surfaces by steel plates each 12 mm thick by 200 mm wide. If the allowable stress in the timber is 8 N/mm² and that in the steel is 110 N/mm², find the allowable bending moment. The ratio of the modulus of elasticity of ...

Verified Answer:

The second moments of area of the timber and steel...