Determine the cracking moment Mcr for the beam depicted in Fig. 6.85. Assume normal-weight concrete,  and Grade 60 reinforcing bars. Calculate the bending stresses in the extreme fibers of the cross-section for a service-load bending moment of 90 ft kips.

Q: Determine the type and magnitude of the stress in a fiber 20 mm from the top of the beam at a…

A: Moment at 1m from the left endM=-2.5×1×12=-1.25kN-m

Q: Why is reinforcing steel used in concrete? Discuss the typical properties ofreinforcing steel.

A: Reinforced concrete is used in concrete to make the structure very strong, and also to increase its…

Q: 1. Deflection angles: A = 28° 25' 00" (L) B = 68° 03' 30" (L) C = 120° 34' 00" (L) D = 58° 30' 00"…

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Q: . Calculate the cracking moment (max. resisting moment) for the unreinforced concrete beam shown.…

A: As per Bartleby's guidelines we are supposed to answer only first question.

Q: A composite bar is made up of a steel strip 2 mm thick and 12 mm wide, sandwiched between two…

A: Given:- steel strip 2 mm thick and 12 mm wide  aluminium strips each 3 mm thick and 12 mm wide.  two…

Q: The following data of a pre-stress concrete are given: Beam dimension ; bxh = 300 mm x 600 mm Loads…

A: In the question  calculation of load  on the beam is permissible until and unless there will no…

Q: A 1.8 m high square concrete column with b = 220 mm (Ec ac = 9.9 × 10-6/° C) is reinforced with six…

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Q: answers. (10 Points Each.) 1. Determine the maximum bending tensile stress and the maximum bending…

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Q: Design bond stress in limit state design method for deformed bars conforming to IS :1786 and M-20…

A: Deformed bars- M-20 concrete To Find- The design bond stress in LSM as per IS:1786.

Q: USE NSCP 2015 as reference: D. Minimum/maximum value of concrete strain(ec), (from nscp2015)…

A: Following is required answer :

Q: Calculate the tensile steel stress

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Q: Which strain and stress profiles shown in the figure below best represent a reinforced concrete…

A: To explain the nature of diagrams in strain and stress conditions for a reinforced concrete in…

Q: Calculate the tensile steel stress of 5-20-mm-dia rebars in a concrete beam 270 mm by 410 mm at…

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Q: What is the prestress steel loss from steel relaxation at 356 days for a Grade 270 low-relaxation…

A: Given:- Initial stress = 190,000 psi Yield stress = 245,000 psi Time period = 356 days To…

Q: Calculate the tensile steel stress of 5-20- mm-dia rebars in a concrete beam 260 mm by 410 mm at…

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Q: Q4: For the RC beam section shown in figure below, find the location of neutral axis (N.A) and the…

A: Given: h = 500 mm d = 450 mm b = 250 mm fc = 30 MPa fy = 420 MPa Es = 200000 MPa Ec = 20000 MPa 3…

Q: As shown below a rectangular R.C.C. column is subjected to compressive force P at an eccentricity of…

A: Given : fy =250 MPa E = 200000 MPa NA depth = 360 mm M20 concrete

Q: The boards for a concrete form are to be bent into a circular shape having an inside radius of 10 m.…

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Q: The grains of wood in the board make an angle of 20° with the horizontal as shown. The board is…

A: The stress in the beam is calculated as: σx=PA=25060×25=166.67×10-3 MPa=166.67 KPa Now, from the…

Q: A pre-tensioned concrete member of section 200 mm x 250 mm contains tendons of area 500 mm2 at…

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Q: 50 mm 20 mr 75 kN

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Q: Consider the prestressed concrete beam and prestressing steel stress-strain diagram given below. The…

A: Given- Ultimate strain capacity - 0.003 in/in Concrete strength - 4000 psi Fse  - 137 ksi Ec - 3850…

Q: A pre-tensioned concrete member of section 200 mm x 250 mm contains tendons of area 500 mm2 at…

A: step 1-

Q: A. Compute the bending stress in the extreme compression fiber of the beam in the figure for a…

A: Given data:- Bending moment,M=30 KN.m=30×106 N.mm Characteristics compressive strength of…

Q: The Dn value for a low relaxation steel is ______.

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Q: Calculate the tensile steel stress of 5-16-mm-dia rebars in a concrete beam 270 mm by 460 mm at…

A: The given data is: The dimensions are=270 mm*460 mm f'c=21 MPa fy=420 MPa The diameter of…

Q: o Why the tensilę strengths of concrete are of the order of 10 and 15%of the compressive'strength.

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Q: The beam is subject to 100 Kn-m Bending moment The modular Ratio is 8 Using cracked Analysis…

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Q: Assuming concrete below the neutral axis to be cracked, the shear stress across the depth of a…

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Q: As per IS 456 : 2000 for M20 grade concrete and plain bars in tension the design bond stress Tbd =…

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Q: Calculate the tensile steel strain of 5-16mm-diameter rebars in a concrete beam 240 mm by 420mm at…

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Q: techniques used to study the concrete behavior at microscopic level.

A: I would like to start answering this problem from very basics, Micro-scopic level- Behaviour of…

Q: Given the following properties of beam: b = 250 mm d = 325 mm  h = 400 mm a) Assuming the…

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Q: A pretensioned member with a dimension of 250mm x 360mm is subject to an eccentric

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Q: Using elastic stress analysis: 1. Evaluate the maimum momert that the hollow structural steel…

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Q: A UNIFORMLY DISTRIBUTED FORCE OF Px=3 (COMPRESSION), Py=6 (TENSION) AND Pz=9 (COMPRESSION) IN THE X,…

A: Given data  Px=3KN (COMPRESSION), Py=6KN (TENSION) AND Pz=9KN (COMPRESSION) IN THE X, Y AND Z…

Q: The figure shows a composite bar, it is stress free before the axial loads P1 and P2 are applied.…

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Q: Calculate the tensile steel stress

A: given- a concrete beam 240 mm by 450 mm reinforced with 5-16-mm-dia and f'c = 21 MPa, fy = 420 MPa.…

Q: The composite bar consists of a 25-mm-diameter A-36 steel segment AB and 60-mm-diameter red brass…

A: Given data:- Diameter of composite bar = 25 mm Grade of steel = A-36 Diameter of red brass  = 60…

Q: When the force P reached 1620 lb, the wooden specimen shown failed in shear along the surface…

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Q: Compute for the concrete stress in Mpa at the top fiber of the given transformed beam se M = 50…

A: Given, Moment M=50 kN-m b=300 mm d=600 mm

Crack Detection

Concrete materials are meant for supporting structures, building foundations and they act as several load-bearing structures. Over time, due to environmental conditions, and based on the constituent materials used, concrete materials are subjected to a great degree of distress. Corrosion of the reinforcement bars due to chemical influences, uneven base, earthquake, drying shrinkages, and alkali-aggregate reactions are some of the reasons for concrete distress.