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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',...
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...
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° (mm), and the moment of area about x-x axis is Is < 10 (mm) Figure Q.2 440 e = 112.76 mm A = 73.32 Ixx = 155.55 |-240 a. Calculate the maximum allowable prestressing force if, at the prestressing stage, the allowable stresses are 1 N/mm' tension and 20 N/mn* compression....
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...
FIGURE Q2 shows cross-section of a rectangular doubly reinforced concrete beam. The concrete grade, fck is...
FIGURE Q2 shows cross-section of a rectangular doubly reinforced concrete beam. The concrete grade, fck is 20 N/mm2 and the steel grade, fyk is 500 N/mm2. Evaluate whether the beam has been designed as under reinforced section AND also determine if the section is able to resist an applied moment of 75 kN.m. [10 marks] 30 mm T 3H10 300 mm 5H12 30 mm 100 mm FIGURE Q2
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with...
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with 4H20 bars as compression steel. Determine the area of tension steel needed for the beam to attain its full moment capacity. Calculate the corresponding ultimate moment of resistance. Assume fck = 30 N/mm2 and fyk = 500 N/mm2.
1. A cross section of a RC beam is described in a below figure. Three No....
1. A cross section of a RC beam is described in a below figure. Three No. 29 reinforcing bars are located at the bottom of the section. The area of a #29 reinforcing bar is 645 mm2 while the yield strength of the steel bar is 420 MPa. The tensile strength of concrete is 2.7 MPa, and the compressive strength of concrete is 21 MPa. In addition, n= E/Eis selected as 8. (1) Compute the maximum compressive and tensile stresses...
03(a) A reinforced concrete beam is acted on by a positive bending moment. reinforcement consists of 4 bars of 28 mm diameter. The modulus of elasticity is E 25 GPa for the concrete and E-200 G...
03(a) A reinforced concrete beam is acted on by a positive bending moment. reinforcement consists of 4 bars of 28 mm diameter. The modulus of elasticity is E 25 GPa for the concrete and E-200 GPa for the steel. The allowable stresses for the concrete and steel are ơ.-9.2 MPa and ơ.-135 MPa, respectively. Determine the maximum permissible positive bending moment. (10 marks) 625 mm 4 bars 28 mm -300 mm Figure Q3(a) 03(b) A simply supported beam that is...
Figure 1 shows A fully symmetrical I beam of area A1 = 5472 mm?, and second...
Figure 1 shows A fully symmetrical I beam of area A1 = 5472 mm?, and second moment of areal = 59.9 x 10 mm' that is strengthened by attaching a plate of 10 mm thickness and 100 mm breadth at the top as shown in Figure 2. Pairs of 12 mm diameter steel bolts are used at regular 200 mm spacing along the beam to connect the plate to the I beam in an arrangement as shown in Figure 3....
Question 2 (30 marks) The wood beam below (cross section dimensions 150 x 250 mm, as...
Question 2 (30 marks) The wood beam below (cross section dimensions 150 x 250 mm, as indicated) is strengthened at the bottom using 3 steel reinforcement plates of the same 12mm thickness (see figure), perfectly glued to the wooden beam. The modulus of elasticity for wood is E,-12 GPa and for steel E,-200 GPa. Given the allowable stresses (in both tension and compression) for wood ơw-12 MPa and for steel Ơs = 150 MPa, determine the largest possible moment due...
please can you solve it as quick as possible. of square cross section is built up by gluing together three strips, each 20 mm x 60 mm in cross section (see figure). The beam has a A l 500 mm. tota...
please can you solve it as quick as possible.
of square cross section is built up by gluing together three strips, each 20 mm x 60 mm in cross section (see figure). The beam has a A l 500 mm. total weight of 5 N and is simply supported with span length L 20 mm 20 mm 60 mm 20 mm 60 mm Considering the weight of the beam (q) calculate the maximum permissible CCW moment M that may be...
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...
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 moment of area about x-x axis is Is < 10 (mm) Figure Q.2 440 e = 112.76 mm A = 73.32 Ixx = 155.55 |-240 a. Calculate the maximum allowable prestressing force if, at the prestressing stage, the allowable stresses are 1 N/mm' tension and 20 N/mn* compression....
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...
FIGURE Q2 shows cross-section of a rectangular doubly reinforced concrete beam. The concrete grade, fck is 20 N/mm2 and the steel grade, fyk is 500 N/mm2. Evaluate whether the beam has been designed as under reinforced section AND also determine if the section is able to resist an applied moment of 75 kN.m. [10 marks] 30 mm T 3H10 300 mm 5H12 30 mm 100 mm FIGURE Q2
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with 4H20 bars as compression steel. Determine the area of tension steel needed for the beam to attain its full moment capacity. Calculate the corresponding ultimate moment of resistance. Assume fck = 30 N/mm2 and fyk = 500 N/mm2.
1. A cross section of a RC beam is described in a below figure. Three No. 29 reinforcing bars are located at the bottom of the section. The area of a #29 reinforcing bar is 645 mm2 while the yield strength of the steel bar is 420 MPa. The tensile strength of concrete is 2.7 MPa, and the compressive strength of concrete is 21 MPa. In addition, n= E/Eis selected as 8. (1) Compute the maximum compressive and tensile stresses...
03(a) A reinforced concrete beam is acted on by a positive bending moment. reinforcement consists of 4 bars of 28 mm diameter. The modulus of elasticity is E 25 GPa for the concrete and E-200 GPa for the steel. The allowable stresses for the concrete and steel are ơ.-9.2 MPa and ơ.-135 MPa, respectively. Determine the maximum permissible positive bending moment. (10 marks) 625 mm 4 bars 28 mm -300 mm Figure Q3(a) 03(b) A simply supported beam that is...
Figure 1 shows A fully symmetrical I beam of area A1 = 5472 mm?, and second moment of areal = 59.9 x 10 mm' that is strengthened by attaching a plate of 10 mm thickness and 100 mm breadth at the top as shown in Figure 2. Pairs of 12 mm diameter steel bolts are used at regular 200 mm spacing along the beam to connect the plate to the I beam in an arrangement as shown in Figure 3....
Question 2 (30 marks) The wood beam below (cross section dimensions 150 x 250 mm, as indicated) is strengthened at the bottom using 3 steel reinforcement plates of the same 12mm thickness (see figure), perfectly glued to the wooden beam. The modulus of elasticity for wood is E,-12 GPa and for steel E,-200 GPa. Given the allowable stresses (in both tension and compression) for wood ơw-12 MPa and for steel Ơs = 150 MPa, determine the largest possible moment due...
please can you solve it as quick as possible.
of square cross section is built up by gluing together three strips, each 20 mm x 60 mm in cross section (see figure). The beam has a A l 500 mm. total weight of 5 N and is simply supported with span length L 20 mm 20 mm 60 mm 20 mm 60 mm Considering the weight of the beam (q) calculate the maximum permissible CCW moment M that may be...
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