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A Class 1 post-tensioned rectangular concrete beam is simply supported over a 10 m span. The char...
A simply supported reinforced concrete beam of 8 m span is subjected to uniformly distributed load...
A simply supported reinforced concrete beam of 8 m span is subjected to uniformly distributed load as shown in Figure 3. The following data are given: The ultimate load, wu is 60 kN/m; characteristic strength of concrete, fck is 30 N/mm²; characteristic strength of reinforcement, fyk is 500 N/mm2. The effective depth, d is 650 mm. Take the link diameter, w as 10 mm, main bar diameter, o as 20 mm and concrete cover as 30 mm. Design the shear...
1. A post tensioned concrete beam, 100mm wide and 400mm deep is prestressed by three cables,...
1. A post tensioned concrete beam, 100mm wide and 400mm deep is prestressed by three cables, each with a cross sectional area of 50mm², initial stress of 1200N/mm². Calculate the stress in concrete at level of steel? 2. A pre tensioned concrete beam 100mm wide and 300mm deep, initial force of 150kN at an eccentricity of 50mm, moment of inertia is 225*10mm, initial stress in steel is 400N/mm², modular ratio is 8. Estimate the percentage loss? 3. A pretensioned concrete...
A post-tensioned member with simply support span cover length equal 18 m, the section properties is...
A post-tensioned member with simply support span cover length equal 18 m, the section properties is already calculated as shown below, assume indoor condition with 0-1.35 the initial stress is estimated foi -1024 N/mm2 was apply in pre-stressing tendon of low-relaxation steel on area Aps 2100 mm2 all the tendons are stressed simultaneously. The shape of the tendon along the member was straight with eccentricity equal to 276. Anchorage draw-in is 9mm Use the following problem data: ws.-19 KN/m ;...
1. A post tensioned concrete beam, 100mm wide and 400mm deep is prestressed by three cables,...
1. A post tensioned concrete beam, 100mm wide and 400mm deep is prestressed by three cables, each with a cross sectional area of 50mm², initial stress of 1200N/mm². Calculate the stress in concrete at level of steel? 2. A pre tensioned concrete beam 100mm wide and 300mm deep, initial force of 150kN at an eccentricity of 50mm, moment of inertia is 225x10mm, initial stress in steel is 400N/mm², modular ratio is 8. Estimate the percentage loss?
e = 108.3 mm A = 10 Ixx = 162.2 2. Figure Q.2 shows the section of a symmetrical prestressed concrete beam in which the eccentricity of the tendons is e mm, the cross-section area is A x 10 (mm',...
e = 108.3 mm
A = 10
Ixx = 162.2
2. Figure Q.2 shows the section of a symmetrical prestressed concrete beam in which the eccentricity of the tendons is e mm, the cross-section area is A x 10 (mm', and the 2d moment of area about x-x axis is Iux x 10' (mm). (50%) Figure Q.2 240 Calculate the maximum allowable prestressing force if, at the prestressing stage, the allowable stresses are 1 N/mm2 tension and 20 N/mn2 compression....
5. Determine the mid-span short-term deflection of a simply supported beam with the section shown in...
5. Determine the mid-span short-term deflection of a simply supported beam with the section shown in Figure Q5. Design data: Concrete strength: fcu 30 MPa. Area of tensile steel reinforcement: As 1500 mm Area of compressive steel reinforcement: A,-1500 mm2 Instantaneous static modulus of elasticity of concrete = 25GPa. Span -8.0 m Loading: Dead load 5.0 kN/m (uniformly distributed load); Live load 5.0 kN/m (uniformly distributed load) (Hint: the height of neutral axis of the mid-span section under the service...
plz make sure..... EXAMPLE 4.1 Consider a concrete beam of rectangular section, 150 mm wide by...
plz make sure.....
EXAMPLE 4.1 Consider a concrete beam of rectangular section, 150 mm wide by 300 mm deep, prestressed by 4 high-tensile wires of 5 mm diameter stressed to 1200 N/mmº. The wires are located at an eccentricity of 50 mm. The stresses developed at the soffit of the beam will be examined by considering the nominal concrete and 'equivalent concrete section. Prestressing force = (1200 x 80) = 96,000 N. For the nominal concrete section, A = 45,000...
2. Figure Q.2 shows the section of a symmetrical prestressed concrete beam in which the eccentricity...
2. Figure Q.2 shows the section of a symmetrical prestressed concrete beam in which the eccentricity of the tendons is e mm, the cross-section area is A x 10' (mm2), and the 2d moment of area about x-x axis is Lu 10 (mm). (50%) Figure Q.2 e106.1 mm xx 1611 240 a. Calculate the maximum allowable prestressing force if, at the prestressing stage, the allowable stresses are 1 N/mm2 tension and 20 N/mn2 compression. What applied moment can then be...
all parts A simply supported concrete beam is to be designed to span 8m. The beam...
all parts
A simply supported concrete beam is to be designed to span 8m. The beam is required to resist a dead load of 40 kN/m (which includes an allowance for self-weight) and an imposed load of 20 kN/m Calculate the ultimate design load that the beam will be required to resist and hence calculate the ultimate design moment. (10 Marks] b) Choose an appropriate depth and width of the beam. [5 marks] c) Calculate an appropriate amount of reinforcing...
Autumn 2018-Pre Assessment Tash Due Date: Monday 26th March A rectangular prestressed concrete beam is to...
Autumn 2018-Pre Assessment Tash Due Date: Monday 26th March A rectangular prestressed concrete beam is to span 10 m simply supported with a of different magnitude over each half span, 20 kN/m on the left half and 60 kN/m on the right half. The span and loads are shown on the skctch below. The UDLs (which include selEweight) are to be used for load-balancing. The proposed elevation is also shown below - note that the maximum eccentricity from the centroidal...
A simply supported reinforced concrete beam of 8 m span is subjected to uniformly distributed load as shown in Figure 3. The following data are given: The ultimate load, wu is 60 kN/m; characteristic strength of concrete, fck is 30 N/mm²; characteristic strength of reinforcement, fyk is 500 N/mm2. The effective depth, d is 650 mm. Take the link diameter, w as 10 mm, main bar diameter, o as 20 mm and concrete cover as 30 mm. Design the shear...
1. A post tensioned concrete beam, 100mm wide and 400mm deep is prestressed by three cables, each with a cross sectional area of 50mm², initial stress of 1200N/mm². Calculate the stress in concrete at level of steel? 2. A pre tensioned concrete beam 100mm wide and 300mm deep, initial force of 150kN at an eccentricity of 50mm, moment of inertia is 225*10mm, initial stress in steel is 400N/mm², modular ratio is 8. Estimate the percentage loss? 3. A pretensioned concrete...
A post-tensioned member with simply support span cover length equal 18 m, the section properties is already calculated as shown below, assume indoor condition with 0-1.35 the initial stress is estimated foi -1024 N/mm2 was apply in pre-stressing tendon of low-relaxation steel on area Aps 2100 mm2 all the tendons are stressed simultaneously. The shape of the tendon along the member was straight with eccentricity equal to 276. Anchorage draw-in is 9mm Use the following problem data: ws.-19 KN/m ;...
1. A post tensioned concrete beam, 100mm wide and 400mm deep is prestressed by three cables, each with a cross sectional area of 50mm², initial stress of 1200N/mm². Calculate the stress in concrete at level of steel? 2. A pre tensioned concrete beam 100mm wide and 300mm deep, initial force of 150kN at an eccentricity of 50mm, moment of inertia is 225x10mm, initial stress in steel is 400N/mm², modular ratio is 8. Estimate the percentage loss?
e = 108.3 mm
A = 10
Ixx = 162.2
2. Figure Q.2 shows the section of a symmetrical prestressed concrete beam in which the eccentricity of the tendons is e mm, the cross-section area is A x 10 (mm', and the 2d moment of area about x-x axis is Iux x 10' (mm). (50%) Figure Q.2 240 Calculate the maximum allowable prestressing force if, at the prestressing stage, the allowable stresses are 1 N/mm2 tension and 20 N/mn2 compression....
5. Determine the mid-span short-term deflection of a simply supported beam with the section shown in Figure Q5. Design data: Concrete strength: fcu 30 MPa. Area of tensile steel reinforcement: As 1500 mm Area of compressive steel reinforcement: A,-1500 mm2 Instantaneous static modulus of elasticity of concrete = 25GPa. Span -8.0 m Loading: Dead load 5.0 kN/m (uniformly distributed load); Live load 5.0 kN/m (uniformly distributed load) (Hint: the height of neutral axis of the mid-span section under the service...
plz make sure.....
EXAMPLE 4.1 Consider a concrete beam of rectangular section, 150 mm wide by 300 mm deep, prestressed by 4 high-tensile wires of 5 mm diameter stressed to 1200 N/mmº. The wires are located at an eccentricity of 50 mm. The stresses developed at the soffit of the beam will be examined by considering the nominal concrete and 'equivalent concrete section. Prestressing force = (1200 x 80) = 96,000 N. For the nominal concrete section, A = 45,000...
2. Figure Q.2 shows the section of a symmetrical prestressed concrete beam in which the eccentricity of the tendons is e mm, the cross-section area is A x 10' (mm2), and the 2d moment of area about x-x axis is Lu 10 (mm). (50%) Figure Q.2 e106.1 mm xx 1611 240 a. Calculate the maximum allowable prestressing force if, at the prestressing stage, the allowable stresses are 1 N/mm2 tension and 20 N/mn2 compression. What applied moment can then be...
all parts
A simply supported concrete beam is to be designed to span 8m. The beam is required to resist a dead load of 40 kN/m (which includes an allowance for self-weight) and an imposed load of 20 kN/m Calculate the ultimate design load that the beam will be required to resist and hence calculate the ultimate design moment. (10 Marks] b) Choose an appropriate depth and width of the beam. [5 marks] c) Calculate an appropriate amount of reinforcing...
Autumn 2018-Pre Assessment Tash Due Date: Monday 26th March A rectangular prestressed concrete beam is to span 10 m simply supported with a of different magnitude over each half span, 20 kN/m on the left half and 60 kN/m on the right half. The span and loads are shown on the skctch below. The UDLs (which include selEweight) are to be used for load-balancing. The proposed elevation is also shown below - note that the maximum eccentricity from the centroidal...
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