The flooring of a warehouse is made up of double – tee joints as shown in Figure-1. The jointsare simply – supported on a span of 8 m and are pre – tensioned with one tendon in each stemwith an initial jacking force of 750 kN each, located 75 mm above the bottom fiber, loss ofprestress at service loads is 20%. The properties of the section are as follows:Total Area = 220,000 mm1 = 1,890 × 10° mm*DL = 2.5 kPaLL = 6 kPayc = 24 kN/mx = 2.5 my: = 90 mmy: = 270 mmya = 75 mmy1N.A.y2УзFigure-11. Determine the initial stress at the bottom fibers due to prestressing force alone.2. Determine the stress at the bottom fiber due to service load and prestressing force.3. Calculate the additional load the floor can carry so that the stress at the bottom fibers at themidspan is zero.

Answered: Image /qna-images/answer/0b5a3e02-d00a-4696-ba0f-d20a0a07bf02.jpg

1. Determine the initial stress at the bottom fibers due to prestressing force alone. 2. Determine the stress at the bottom fiber due to service load and prestressing force. 3. Calculate the additional load the floor can carry so that the stress at the bottom fibers at ti midspan is zero.

1. Determine the initial stress at the bottom fibers due to prestressing force alone. 2. Determine the stress at the bottom fiber due to service load and prestressing force. 3. Calculate the additional load the floor can carry so that the stress at the bottom fibers at ti midspan is zero.

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

The stress between a brick and another one below in a wall is bearing .stress True False
Question-02Describe the various types of stresses developed in the shaft AB due to load P acting at the end C as shownin Figure 1.
Please answer fast ASAP
A simply supported beam is reinforced with 5-p25 mm at the bottom and 2-020 mm at the top of the beam. Concrete covering to centroid of reinforcement is 70 mm at the top and 64 mm at the bottom of the beam. The beam has a gross depth of 450 mm and gross width of 300 mm. fc'= 28 MPa, fy = 415 MPa. Assume bars laid out in single layer. Calculate the following if the limiting tensile steel strain is 0.004 for a ductile failure: Depth of the neutral axis from the extreme concrete compression fiber to the nearest whole number = mm Design strength of the beam section to the nearest whole number = kN -m Maximum service uniform live load over the entire span in addition to a DL = 20 kN/m (including the weight of the beam) if it has a span of 6 m = kN/m (to the nearest whole number)
I need help on this question: a) Find strain energy for truss AC. The answer should be in J to 2 decimal places. (positive value indicates tension, negative value compression) b) Find strain energy for truss AB. The answer should be in J to 2 decimal places. (positive value indicates tension, negative value compression) c) Find Strain energy for truss BC. The answer should be in J to 2 decimal places. (positive value indicates tension, negative value compression)
S9. Knowing that the allowable normal stress for the steel used is 150 MPa, select the most economical metric wide-flange beam to support the loading shown in Figure 9.0. 50 kN/m A D B -2.4 m- 0.8 m 0.8 m Figure 9.0 $10. Determine the average shearing stress in the web of the beam indicated and check whether the design obtained earlier for that beam is acceptable, knowing that the allowable shearing stress for the steel used is 110 MPa. Consider the beam of $9 above.
A prestressed beam has a width of 300 mm and depth of 600 mm. It is subjected to a bonded prestress tendon having an area of 590 mm2 acting at a distance 550 mm from the compression, face of the member. fc' = 34.6 MPa, fpu = 1860 MPa, fpy = 0.85fpu (stress-relived strands).COMPUTE THE STRESS IN THE PRESTRESS REINFORCEMENT AT NOMINAL STRENGTH (MPa)
2. Per ACI318-19, choose the correct value of the strength reduction factor ø for the flexural capacity of a beam with ɛ = tension face. 0.0032, where & is the strain for steel reinforcement closest to the (A)0.9 (B) 0.85 (C) 0.75 (D)0.65
The beam shown left below has the cross section shown right below. Determine(a)The maximum tensile fiber stress in the beam.(b)The maximum compressive fiber stress in the beam.(c)The shearing stress 50 mm below the top surface of the flange.(d) The maximum shearing stress
1. Figure shows two wood members are joined together using a 60 degrees wood glue adhesive. Find the average normal and shear stress resisted in the plane of the connection. 25 mm 8 kN- 8 kN 60° 30 mm