A concrete beam (rectangular) of cross-section 30 cm deep and 20 cm wide is pre-stressed by (15) wires of 5 mm diameter located (6.5) cm from the bottom of the beam and 3 wires of diameter of 5 mm, 2.5 cm from the top. Assuming the pre -stress in the steel as 840 N/mm', calculate the stresses at the extreme fibers of the mid span section when the beam is supporting its own weight over a span of 6 m. If a uniformly distributed live load of 6kN/m is imposed, evaluate the maximum working stress in concrete. The density of concrete is 24kN/m'. 200 mm I 25 mm LL-6kN'm 300 mm 6m 65 s

A concrete beam (rectangular) of cross-section 30 cm deep and 20 cm wide is pre-stressed by (15) wires of 5 mm diameter located (6.5) cm from the bottom of the beam and 3 wires of diameter of 5 mm, 2.5 cm from the top. Assuming the pre -stress in the steel as 840 N/mm', calculate the stresses at the extreme fibers of the mid span section when the beam is supporting its own weight over a span of 6 m. If a uniformly distributed live load of 6kN/m is imposed, evaluate the maximum working stress in concrete. The density of concrete is 24kN/m'. 200 mm I 25 mm LL-6kN'm 300 mm 6m 65 s

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Problem 2 A composite beam made of steel and concrete has the dimensions and layout shown below. Determine (a) the location of the neutral axis; (b) The maximum allowable positive moment for the beam cross-section; and (c) the maximum allowable negative moment for the beam cross-section. = 200 GPa and a yield stress oy, steel = = 25 GPa and a yield stress oy, concrete = 30 MPa. The steel has an elastic modulus Esteel 275 MPa. The concrete has an elastic modulus Econcrete Assume that the concrete cannot carry any tensile stress. 2500mm 100mm 10mm 260mm 6mm 100mm
A composite beam is constructed using a steelplate (13 mm × 150 mm) with two wood beams (75 mm ×150 mm) on either side. The wood and steel are securelyfastened to act as a single beam. The beam is subjected to a positive bending moment Mz 5 ? 6.75 kN m. Cal-culate the maximum tensile and compressive stresses in the wood and steel if 11 GPa Ew 5 and 200 GPa
pre stressed conc. solution pls answer
A steel loop ABCD is placed around a 1.0 in. diameter aluminum rod AC. Cables BE and DF, each of 0.5 in. diameter, are used to apply the load Q. What is the largest allowable Q if the axial stress in cable BE stays under 23 ksi while the max axial stress in the aluminum rod AC is under 13 ksi? Reference: Beer, et.al., 7th Edition Mechanics of Materials 9 in. Į 9 in. ↓ A 12 in. 1 in. 4 E * F B D Q' 12 in. in. in. C
3) will upvote to anyone who will answer
The T-beam shown in figure resulted from monolithic construction of the beam and slab. The effective flange width is 1100 mm and the uniform slab thickness is 120mm. Width of beam is 340 mm, total depth of the T-section is 590 mm. The centroid of steel is 70 mm from extreme concrete fiber. Concrete strength f’c= 21 MPa amd steel strength fy= 415 MPa. 1 Calculate the nominal strength of the beam for positive moment neglecting the contribution of the top reinforcement, KN-m A 428.55 B 503.20 C 355.96 D 637.52 2 Calculate the nominal strength of the beam for negative moment, KN-m A 289.88 B 275.53 C 311.67 D 325.48
A doubly reinforced concrete beam of size 250 mm x 500 mm overall depth is reinforced with 2-12 mm dia. bars in compression zone and 3-20 mm dia. bars in tension zone, each at an effective cover of 40 mm. The grade of concrete and steel are M20 and Fe415 respectively. The strain in compression steel will be [Take stress in compression steel as 345 MPa]
The T-beam has the following properties: flange thickness = 110 mm flange width = 700 mm web width = 400 mm web height = 250 mm f'c = 28 Mpa a) Calculate the stresses in concrete at uncracked stage under 100 kN-m. b) Calculate the cracking moment. c) Determine the balanced steel area and balanced ultimate moment. The steel is placed 80 mm from its cg up to extreme fiber with yield strength of 414 MPa. NOTE: Please answer the question correctly, if you are not sure about the answer(s) please skip the question. Please box the final answer(s) Thank you
A high-strength steel band saw, 24 mm wide, runs over pulleys 900 mm in diameter. What minimum thickness of the steel band can be used without exceeding a flexural stress of 310? Assume E= 230 GPa. Answer must be in mm.
I need the answer as soon as possible
A concrete beam reinforced for tension has a section shown. The rebars are laid out in a single layer only. The compressive strength of concrete is 24 MPa and yield strength of steel bars is 345 MPa. b= 300 mm h=740mm sc=60mm As = 5 pieces of 36 mm diameter rebars 1. Calculate the depth of compression block in mm 2. Calculate the depth of neutral axis c in mm 3. Type failure (Tension, Compression, Transition) 4. Calculate the actual tensile stress in the tension reinforcements in MPa 5. Calculate the Ultimate Moment Capacity of the beam in kN-m b As SC
For a given loading on a rectangular plain concrete beam with an overall depth of 500 mm, the compressive strain and tensile strain developed at the extreme fibers are of the same magnitude of 2.5 x 10-4. The curvature in the beam cross-section (in m-, round off to 3 decimal places), is