A concrete beam of rectangular section is 10 cm wide and is reinforced with steel bars whose axes are 30 cm below the top of the beam. Estimate the required total area of the cross-section of the steel if the maximum compressive stress in the concrete is to be 7.5 MN/m? and the tensile stress in the steel is 135 MN/m? beam is subjected to pure bending. What bending moment would the beam withstand when in this condition? Assume that Young's modulus for steel is 15 times that for concrete and that concrete can sustain no tensile stresses. (Cambridge)

A concrete beam of rectangular section is 10 cm wide and is reinforced with steel bars whose axes are 30 cm below the top of the beam. Estimate the required total area of the cross-section of the steel if the maximum compressive stress in the concrete is to be 7.5 MN/m? and the tensile stress in the steel is 135 MN/m? beam is subjected to pure bending. What bending moment would the beam withstand when in this condition? Assume that Young's modulus for steel is 15 times that for concrete and that concrete can sustain no tensile stresses. (Cambridge)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Q2: A fiberglass composite consists of a matrix of vinyl ester and reinforcing fibers of E-glass. The volume fraction of E-glass is 30%. The density of the vinyl estiser 0.882 g/cm³, and its modulus of elasticity is 3.6 GPa. The density of E-glass is 2.6 g/cm³, and its modulus of elasticity is 76 GPa. A section of composite 1 cm by 25 cm by 2 m is fabricated with the E-glass fibers running longitudinally in the 2000 mm direction. Determine: (a) The masses of vinyl ester and E-glass fibers. (b) The density of the composite. (c) The composite modulus of elasticity in the longitudinal and the perpendicular directions of the glass fibers. (d) If the tensile strength of the glass fibers, is 1 GPA and the tensile strength of the epoxy matrix is 60 MPa, find the tensile strength of the composite in the longitudinal direction.
Figure 3 shows the cross-section of a bulb beam. a) b) Determine the centroid of a bulb beam (10 Marks) Determine the moment of inertia for a bulb beam about the x' passing through the centroid of the cross section 100 mm 50 mm 400 mm 250 mm → ←50 mm 80 mm Figure 3: Cross-section of a bulb beam
Describe a method for determining the shape of a beam that is fully stressed along its length?
You have been asked to help a world famous sculpture artist with a new project. Part of the design calls for an array of long, slender cantilever beams extending from the side of a building. The artist has a fixed length in mind for each beam, and r esthetic purposes, she wants the beams to be square cross sections (b × b) that are as thin as Q9. possible (smallest possible b). Each beam has a limit on the end deflection, DELTA (8), and also it should not break under load. Identify the constraints for this design case. I. It should not break under load. II. Smallest thickness, b. III. Fixed length of beam. IV. Deflection should not exceed 8 А. I and III B. I and II C. III and IV D. I and IV |
.BEAMS WITH MORE THAN 3 UNKNOWN REACTIONS ARE CONSIDERED ______________.
Discuss how to prevent the twisting of a beam when it supports a load?
Required information A block of wood is compressed 2.00 nm when inward forces of magnitude 139 N are applied to it on two opposite sides. How much work is done by the applied forces during the compression of the same block by inward forces of magnitude 480 N?
Provide the relationship between the too variables: (direct, inverse, no effect) Fiber alignment along longitudinal direction - Strength along the transverse direction Coefficient of thermal expansion - dimension Temperature - Thermal stress of unconstrained beam Magnetic moments of antiferromagnets - Net magnetism 2.4 eV band gap energy of a single crystal insulator - Opacity
An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J). It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).
%YO l. ۱۳ ۱ ۱ من ۱۸ ۱ ۱ 1 Semester Exam Time: 90 Minutes Date: 7/03 /2021 Code: CIV141 t force irected applied loads and moments as shown, calculate ne the Q2/ A simply supported beam supports the the support reactions? 12 kN 4 kN/m 8 kN-m 16 kN-m 2 kN/m 3 m 4 m 4 m 4 m Zaman Nashwan 22:18 äe lull 21.03.08 I
4. Three main sources of metals and their compounds are
Calculate the total electrical energy consumed for a load usage of 6 lamps (20 watts each) for 5 hrs a day. Total Electrical Energy consumed per day in watt hours=